prosody
5059a639f61e
util-src/poll.c

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util-src/poll.c @ 12545:5059a639f61e

util.watchdog: Update to use "new" util.timer API When this module was written, it wasn't possible to cancel or reschedule a timer. Times have changed, and we should take advantage of those new methods. This module becomes a very thin wrapper around util.timer now, but I'd argue it's still a very common and useful concept/abstraction to have around. Possible API change: this removes the 'last_reset' field of the watchdog. This was never really intended as a public thing, and I can't find any code that uses it, so I consider removal to be safe.
author Matthew Wild <mwild1@gmail.com>
date Sat, 11 Jun 2022 21:11:01 +0100
parent 12316:6bb2f660f689
child 12575:1f6f05a98fcd
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rev   line source
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1
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2 /*
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3 * Lua polling library
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4 * Copyright (C) 2017-2022 Kim Alvefur
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5 *
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6 * This project is MIT licensed. Please see the
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7 * COPYING file in the source package for more information.
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8 *
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9 */
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10
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11 #include <unistd.h>
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12 #include <string.h>
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13 #include <errno.h>
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14
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15 #if defined(__linux__)
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16 #define USE_EPOLL
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17 #define POLL_BACKEND "epoll"
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18 #elif defined(__unix__)
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19 #define USE_POLL
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20 #define POLL_BACKEND "poll"
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21 #else
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22 #define USE_SELECT
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23 #define POLL_BACKEND "select"
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24 #endif
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25
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26 #ifdef USE_EPOLL
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27 #include <sys/epoll.h>
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28 #ifndef MAX_EVENTS
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29 #define MAX_EVENTS 64
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30 #endif
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31 #endif
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32 #ifdef USE_POLL
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33 #include <poll.h>
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34 #ifndef MAX_EVENTS
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35 #define MAX_EVENTS 10000
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36 #endif
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37 #endif
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38 #ifdef USE_SELECT
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39 #include <sys/select.h>
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40 #endif
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41
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42 #include <lualib.h>
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43 #include <lauxlib.h>
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44
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45 #define STATE_MT "util.poll<" POLL_BACKEND ">"
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46
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47 #if (LUA_VERSION_NUM == 501)
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48 #define luaL_setmetatable(L, tname) luaL_getmetatable(L, tname); lua_setmetatable(L, -2)
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49 #endif
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50 #if (LUA_VERSION_NUM < 504)
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51 #define luaL_pushfail lua_pushnil
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52 #endif
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53
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54 /*
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55 * Structure to keep state for each type of API
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56 */
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57 typedef struct Lpoll_state {
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58 int processed;
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59 #ifdef USE_EPOLL
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60 int epoll_fd;
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61 struct epoll_event events[MAX_EVENTS];
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62 #endif
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63 #ifdef USE_POLL
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64 nfds_t count;
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65 struct pollfd events[MAX_EVENTS];
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66 #endif
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67 #ifdef USE_SELECT
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68 fd_set wantread;
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69 fd_set wantwrite;
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70 fd_set readable;
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71 fd_set writable;
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72 fd_set all;
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73 fd_set err;
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74 #endif
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75 } Lpoll_state;
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76
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77 /*
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78 * Add an FD to be watched
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79 */
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80 static int Ladd(lua_State *L) {
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81 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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82 int fd = luaL_checkinteger(L, 2);
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83
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84 int wantread = lua_toboolean(L, 3);
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85 int wantwrite = lua_toboolean(L, 4);
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86
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87 if(fd < 0) {
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88 luaL_pushfail(L);
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89 lua_pushstring(L, strerror(EBADF));
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90 lua_pushinteger(L, EBADF);
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91 return 3;
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92 }
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93
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94 #ifdef USE_EPOLL
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95 struct epoll_event event;
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96 event.data.fd = fd;
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97 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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98
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99 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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100
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101 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_ADD, fd, &event);
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102
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103 if(ret < 0) {
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104 ret = errno;
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105 luaL_pushfail(L);
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106 lua_pushstring(L, strerror(ret));
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107 lua_pushinteger(L, ret);
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108 return 3;
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109 }
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110
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111 lua_pushboolean(L, 1);
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112 return 1;
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113
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114 #endif
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115 #ifdef USE_POLL
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116
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117 for(nfds_t i = 0; i < state->count; i++) {
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118 if(state->events[i].fd == fd) {
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119 luaL_pushfail(L);
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120 lua_pushstring(L, strerror(EEXIST));
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121 lua_pushinteger(L, EEXIST);
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122 return 3;
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123 }
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124 }
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125
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126 if(state->count >= MAX_EVENTS) {
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127 luaL_pushfail(L);
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128 lua_pushstring(L, strerror(EMFILE));
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129 lua_pushinteger(L, EMFILE);
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130 return 3;
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131 }
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132
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133 state->events[state->count].fd = fd;
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134 state->events[state->count].events = (wantread ? POLLIN : 0) | (wantwrite ? POLLOUT : 0);
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135 state->events[state->count].revents = 0;
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136 state->count++;
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137
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138 lua_pushboolean(L, 1);
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139 return 1;
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140 #endif
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141 #ifdef USE_SELECT
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142
9447
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143 if(fd > FD_SETSIZE) {
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144 luaL_pushfail(L);
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145 lua_pushstring(L, strerror(EBADF));
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146 lua_pushinteger(L, EBADF);
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147 return 3;
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148 }
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149
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150 if(FD_ISSET(fd, &state->all)) {
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151 luaL_pushfail(L);
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152 lua_pushstring(L, strerror(EEXIST));
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153 lua_pushinteger(L, EEXIST);
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154 return 3;
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155 }
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156
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157 FD_CLR(fd, &state->readable);
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158 FD_CLR(fd, &state->writable);
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159 FD_CLR(fd, &state->err);
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160
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161 FD_SET(fd, &state->all);
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162
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163 if(wantread) {
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164 FD_SET(fd, &state->wantread);
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165 }
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166 else {
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167 FD_CLR(fd, &state->wantread);
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168 }
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169
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170 if(wantwrite) {
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171 FD_SET(fd, &state->wantwrite);
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172 }
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173 else {
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174 FD_CLR(fd, &state->wantwrite);
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175 }
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176
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177 lua_pushboolean(L, 1);
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178 return 1;
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179 #endif
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180 }
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181
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182 /*
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183 * Set events to watch for, readable and/or writable
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184 */
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185 static int Lset(lua_State *L) {
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186 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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187 int fd = luaL_checkinteger(L, 2);
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188
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189 #ifdef USE_EPOLL
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190
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191 int wantread = lua_toboolean(L, 3);
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192 int wantwrite = lua_toboolean(L, 4);
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193
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194 struct epoll_event event;
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195 event.data.fd = fd;
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196 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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197
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198 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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199
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200 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_MOD, fd, &event);
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201
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202 if(ret == 0) {
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203 lua_pushboolean(L, 1);
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204 return 1;
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205 }
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206 else {
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207 ret = errno;
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208 luaL_pushfail(L);
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209 lua_pushstring(L, strerror(ret));
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210 lua_pushinteger(L, ret);
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211 return 3;
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212 }
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213
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214 #endif
12316
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215 #ifdef USE_POLL
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216 int wantread = lua_toboolean(L, 3);
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217 int wantwrite = lua_toboolean(L, 4);
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218
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219 for(nfds_t i = 0; i < state->count; i++) {
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220 struct pollfd *event = &state->events[i];
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221
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222 if(event->fd == fd) {
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223 event->events = (wantread ? POLLIN : 0) | (wantwrite ? POLLOUT : 0);
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224 lua_pushboolean(L, 1);
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225 return 1;
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226 } else if(event->fd == -1) {
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227 break;
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228 }
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229 }
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230
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231 luaL_pushfail(L);
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232 lua_pushstring(L, strerror(ENOENT));
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233 lua_pushinteger(L, ENOENT);
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234 return 3;
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235 #endif
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236 #ifdef USE_SELECT
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237
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238 if(!FD_ISSET(fd, &state->all)) {
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239 luaL_pushfail(L);
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240 lua_pushstring(L, strerror(ENOENT));
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241 lua_pushinteger(L, ENOENT);
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242 return 3;
9313
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243 }
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244
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245 if(!lua_isnoneornil(L, 3)) {
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246 if(lua_toboolean(L, 3)) {
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247 FD_SET(fd, &state->wantread);
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248 }
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249 else {
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250 FD_CLR(fd, &state->wantread);
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251 }
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252 }
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253
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254 if(!lua_isnoneornil(L, 4)) {
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255 if(lua_toboolean(L, 4)) {
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256 FD_SET(fd, &state->wantwrite);
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257 }
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diff changeset
258 else {
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259 FD_CLR(fd, &state->wantwrite);
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260 }
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261 }
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262
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263 lua_pushboolean(L, 1);
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264 return 1;
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265 #endif
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266 }
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267
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diff changeset
268 /*
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parents:
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269 * Remove FDs
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270 */
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271 static int Ldel(lua_State *L) {
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272 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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273 int fd = luaL_checkinteger(L, 2);
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274
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275 #ifdef USE_EPOLL
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276
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277 struct epoll_event event;
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diff changeset
278 event.data.fd = fd;
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279
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280 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_DEL, fd, &event);
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281
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282 if(ret == 0) {
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283 lua_pushboolean(L, 1);
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284 return 1;
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285 }
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286 else {
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287 ret = errno;
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288 luaL_pushfail(L);
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289 lua_pushstring(L, strerror(ret));
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290 lua_pushinteger(L, ret);
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291 return 3;
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292 }
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293
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294 #endif
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295 #ifdef USE_POLL
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296
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297 if(state->count == 0) {
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298 luaL_pushfail(L);
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299 lua_pushstring(L, strerror(ENOENT));
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300 lua_pushinteger(L, ENOENT);
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301 return 3;
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302 }
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303
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304 /*
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305 * Move the last item on top of the removed one
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306 */
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307 struct pollfd *last = &state->events[state->count - 1];
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308
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309 for(nfds_t i = 0; i < state->count; i++) {
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310 struct pollfd *event = &state->events[i];
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311
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312 if(event->fd == fd) {
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313 event->fd = last->fd;
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314 event->events = last->events;
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315 event->revents = last->revents;
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316 last->fd = -1;
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317 state->count--;
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318
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319 lua_pushboolean(L, 1);
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320 return 1;
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321 }
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322 }
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323
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324 luaL_pushfail(L);
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325 lua_pushstring(L, strerror(ENOENT));
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326 lua_pushinteger(L, ENOENT);
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327 return 3;
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328 #endif
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329 #ifdef USE_SELECT
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330
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331 if(!FD_ISSET(fd, &state->all)) {
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332 luaL_pushfail(L);
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333 lua_pushstring(L, strerror(ENOENT));
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334 lua_pushinteger(L, ENOENT);
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335 return 3;
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336 }
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diff changeset
337
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338 FD_CLR(fd, &state->wantread);
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339 FD_CLR(fd, &state->wantwrite);
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340 FD_CLR(fd, &state->readable);
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341 FD_CLR(fd, &state->writable);
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342 FD_CLR(fd, &state->all);
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343 FD_CLR(fd, &state->err);
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344
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345 lua_pushboolean(L, 1);
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346 return 1;
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347 #endif
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348 }
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349
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350
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351 /*
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352 * Check previously manipulated event state for FDs ready for reading or writing
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353 */
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354 static int Lpushevent(lua_State *L, struct Lpoll_state *state) {
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355 #ifdef USE_EPOLL
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356
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357 if(state->processed > 0) {
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358 state->processed--;
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359 struct epoll_event event = state->events[state->processed];
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360 lua_pushinteger(L, event.data.fd);
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361 lua_pushboolean(L, event.events & (EPOLLIN | EPOLLHUP | EPOLLRDHUP | EPOLLERR));
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362 lua_pushboolean(L, event.events & EPOLLOUT);
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363 return 3;
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diff changeset
364 }
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diff changeset
365
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366 #endif
12316
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367 #ifdef USE_POLL
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368
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369 for(int i = state->processed - 1; i >= 0; i--) {
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370 struct pollfd *event = &state->events[i];
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371
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diff changeset
372 if(event->fd != -1 && event->revents != 0) {
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373 lua_pushinteger(L, event->fd);
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374 lua_pushboolean(L, event->revents & (POLLIN | POLLHUP | POLLERR));
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375 lua_pushboolean(L, event->revents & POLLOUT);
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diff changeset
376 event->revents = 0;
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diff changeset
377 state->processed = i;
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378 return 3;
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diff changeset
379 }
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diff changeset
380 }
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diff changeset
381
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diff changeset
382 #endif
12314
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383 #ifdef USE_SELECT
9313
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384
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diff changeset
385 for(int fd = state->processed + 1; fd < FD_SETSIZE; fd++) {
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diff changeset
386 if(FD_ISSET(fd, &state->readable) || FD_ISSET(fd, &state->writable) || FD_ISSET(fd, &state->err)) {
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diff changeset
387 lua_pushinteger(L, fd);
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diff changeset
388 lua_pushboolean(L, FD_ISSET(fd, &state->readable) | FD_ISSET(fd, &state->err));
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diff changeset
389 lua_pushboolean(L, FD_ISSET(fd, &state->writable));
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diff changeset
390 FD_CLR(fd, &state->readable);
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diff changeset
391 FD_CLR(fd, &state->writable);
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diff changeset
392 FD_CLR(fd, &state->err);
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diff changeset
393 state->processed = fd;
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diff changeset
394 return 3;
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
395 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
396 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
397
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
398 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
399 return 0;
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
400 }
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
401
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
402 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
403 * Wait for event
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
404 */
9954
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diff changeset
405 static int Lwait(lua_State *L) {
9313
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diff changeset
406 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
407
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
408 int ret = Lpushevent(L, state);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
409
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
410 if(ret != 0) {
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
411 return ret;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
412 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
413
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
414 lua_Number timeout = luaL_checknumber(L, 2);
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parents:
diff changeset
415 luaL_argcheck(L, timeout >= 0, 1, "positive number expected");
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
416
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
417 #ifdef USE_EPOLL
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diff changeset
418 ret = epoll_wait(state->epoll_fd, state->events, MAX_EVENTS, timeout * 1000);
12314
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diff changeset
419 #endif
12316
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diff changeset
420 #ifdef USE_POLL
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diff changeset
421 ret = poll(state->events, state->count, timeout * 1000);
6bb2f660f689 util.poll: Add support for the poll() API
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diff changeset
422 #endif
12314
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diff changeset
423 #ifdef USE_SELECT
9313
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diff changeset
424 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
425 * select(2) mutates the fd_sets passed to it so in order to not
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
426 * have to recreate it manually every time a copy is made.
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
427 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
428 memcpy(&state->readable, &state->wantread, sizeof(fd_set));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
429 memcpy(&state->writable, &state->wantwrite, sizeof(fd_set));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
430 memcpy(&state->err, &state->all, sizeof(fd_set));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
431
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
432 struct timeval tv;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
433 tv.tv_sec = (time_t)timeout;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
434 tv.tv_usec = ((suseconds_t)(timeout * 1000000)) % 1000000;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
435
9437
b202aa1e2d7b util.poll: Fix monitoring of socket exceptions in select mode
Kim Alvefur <zash@zash.se>
parents: 9318
diff changeset
436 ret = select(FD_SETSIZE, &state->readable, &state->writable, &state->err, &tv);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
437 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
438
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
439 if(ret == 0) {
10921
6eb5d2bb11af util-src: Use the luaL_pushfail API added in Lua 5.4 to highlight all failure conditions
Kim Alvefur <zash@zash.se>
parents: 10096
diff changeset
440 /* Is this an error? */
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
441 lua_pushnil(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
442 lua_pushstring(L, "timeout");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
443 return 2;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
444 }
9508
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
445 else if(ret < 0 && errno == EINTR) {
10921
6eb5d2bb11af util-src: Use the luaL_pushfail API added in Lua 5.4 to highlight all failure conditions
Kim Alvefur <zash@zash.se>
parents: 10096
diff changeset
446 /* Is this an error? */
9508
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
447 lua_pushnil(L);
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
448 lua_pushstring(L, "signal");
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
449 return 2;
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
450 }
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
451 else if(ret < 0) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
452 ret = errno;
10921
6eb5d2bb11af util-src: Use the luaL_pushfail API added in Lua 5.4 to highlight all failure conditions
Kim Alvefur <zash@zash.se>
parents: 10096
diff changeset
453 luaL_pushfail(L);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
454 lua_pushstring(L, strerror(ret));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
455 lua_pushinteger(L, ret);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
456 return 3;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
457 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
458
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
459 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
460 * Search for the first ready FD and return it
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
461 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
462 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
463 state->processed = ret;
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
464 #endif
12316
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
465 #ifdef USE_POLL
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
466 state->processed = state->count;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
467 #endif
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
468 #ifdef USE_SELECT
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
469 state->processed = -1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
470 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
471 return Lpushevent(L, state);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
472 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
473
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
474 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
475 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
476 * Return Epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
477 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
478 static int Lgetfd(lua_State *L) {
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
479 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
480 lua_pushinteger(L, state->epoll_fd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
481 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
482 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
483
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
484 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
485 * Close epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
486 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
487 static int Lgc(lua_State *L) {
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
488 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
489
9478
bd178ed0459b util.poll: Fix inverted logic
Kim Alvefur <zash@zash.se>
parents: 9476
diff changeset
490 if(state->epoll_fd == -1) {
9475
9b26a50cdfe3 util.poll: Early return from __gc in case of no valid epoll FD
Kim Alvefur <zash@zash.se>
parents: 9450
diff changeset
491 return 0;
9b26a50cdfe3 util.poll: Early return from __gc in case of no valid epoll FD
Kim Alvefur <zash@zash.se>
parents: 9450
diff changeset
492 }
9b26a50cdfe3 util.poll: Early return from __gc in case of no valid epoll FD
Kim Alvefur <zash@zash.se>
parents: 9450
diff changeset
493
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
494 if(close(state->epoll_fd) == 0) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
495 state->epoll_fd = -1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
496 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
497 else {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
498 lua_pushstring(L, strerror(errno));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
499 lua_error(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
500 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
501
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
502 return 0;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
503 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
504 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
505
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
506 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
507 * String representation
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
508 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
509 static int Ltos(lua_State *L) {
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
510 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
511 lua_pushfstring(L, "%s: %p", STATE_MT, state);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
512 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
513 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
514
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
515 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
516 * Create a new context
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
517 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
518 static int Lnew(lua_State *L) {
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
519 /* Allocate state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
520 Lpoll_state *state = lua_newuserdata(L, sizeof(Lpoll_state));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
521 luaL_setmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
522
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
523 /* Initialize state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
524 #ifdef USE_EPOLL
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
525 state->epoll_fd = -1;
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
526 state->processed = 0;
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
527
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
528 int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
529
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
530 if(epoll_fd <= 0) {
10921
6eb5d2bb11af util-src: Use the luaL_pushfail API added in Lua 5.4 to highlight all failure conditions
Kim Alvefur <zash@zash.se>
parents: 10096
diff changeset
531 luaL_pushfail(L);
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
532 lua_pushstring(L, strerror(errno));
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
533 lua_pushinteger(L, errno);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
534 return 3;
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
535 }
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
536
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
537 state->epoll_fd = epoll_fd;
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
538 #endif
12316
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
539 #ifdef USE_POLL
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
540 state->processed = -1;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
541 state->count = 0;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
542
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
543 for(nfds_t i = 0; i < MAX_EVENTS; i++) {
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
544 state->events[i].fd = -1;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
545 state->events[i].events = 0;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
546 state->events[i].revents = 0;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
547 }
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
548
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
549 #endif
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
550 #ifdef USE_SELECT
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
551 FD_ZERO(&state->wantread);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
552 FD_ZERO(&state->wantwrite);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
553 FD_ZERO(&state->readable);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
554 FD_ZERO(&state->writable);
9448
352e8b75c1ae util.poll: Zero FD sets watched for errors on creation
Kim Alvefur <zash@zash.se>
parents: 9447
diff changeset
555 FD_ZERO(&state->all);
352e8b75c1ae util.poll: Zero FD sets watched for errors on creation
Kim Alvefur <zash@zash.se>
parents: 9447
diff changeset
556 FD_ZERO(&state->err);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
557 state->processed = FD_SETSIZE;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
558 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
559
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
560 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
561 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
562
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
563 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
564 * Open library
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
565 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
566 int luaopen_util_poll(lua_State *L) {
9318
3429006518bf util.poll: Lua 5.1 compat
Kim Alvefur <zash@zash.se>
parents: 9317
diff changeset
567 #if (LUA_VERSION_NUM > 501)
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
568 luaL_checkversion(L);
9318
3429006518bf util.poll: Lua 5.1 compat
Kim Alvefur <zash@zash.se>
parents: 9317
diff changeset
569 #endif
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
570
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
571 luaL_newmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
572 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
573
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
574 lua_pushliteral(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
575 lua_setfield(L, -2, "__name");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
576
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
577 lua_pushcfunction(L, Ltos);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
578 lua_setfield(L, -2, "__tostring");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
579
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
580 lua_createtable(L, 0, 2);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
581 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
582 lua_pushcfunction(L, Ladd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
583 lua_setfield(L, -2, "add");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
584 lua_pushcfunction(L, Lset);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
585 lua_setfield(L, -2, "set");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
586 lua_pushcfunction(L, Ldel);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
587 lua_setfield(L, -2, "del");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
588 lua_pushcfunction(L, Lwait);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
589 lua_setfield(L, -2, "wait");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
590 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
591 lua_pushcfunction(L, Lgetfd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
592 lua_setfield(L, -2, "getfd");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
593 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
594 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
595 lua_setfield(L, -2, "__index");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
596
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
597 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
598 lua_pushcfunction(L, Lgc);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
599 lua_setfield(L, -2, "__gc");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
600 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
601 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
602
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
603 lua_createtable(L, 0, 3);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
604 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
605 lua_pushcfunction(L, Lnew);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
606 lua_setfield(L, -2, "new");
9506
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
607
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
608 #define push_errno(named_error) lua_pushinteger(L, named_error);\
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
609 lua_setfield(L, -2, #named_error);
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
610
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
611 push_errno(EEXIST);
12316
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
612 push_errno(EMFILE);
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
613 push_errno(ENOENT);
9506
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
614
12315
cf2086a1bd45 util.poll: Expose API (epoll or select) used
Kim Alvefur <zash@zash.se>
parents: 12314
diff changeset
615 lua_pushliteral(L, POLL_BACKEND);
cf2086a1bd45 util.poll: Expose API (epoll or select) used
Kim Alvefur <zash@zash.se>
parents: 12314
diff changeset
616 lua_setfield(L, -2, "api");
cf2086a1bd45 util.poll: Expose API (epoll or select) used
Kim Alvefur <zash@zash.se>
parents: 12314
diff changeset
617
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
618 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
619 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
620 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
621