prosody
22066b02887f
util-src/poll.c

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util-src/poll.c @ 12781:22066b02887f

util.startup: Provide a common Lua 5.3+ math.type() for Lua 5.2 Code deduplication
author Kim Alvefur <zash@zash.se>
date Wed, 19 Oct 2022 16:25:05 +0200
parent 12575:1f6f05a98fcd
child 12884:f5a75aaa8a25
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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 < 504)
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48 #define luaL_pushfail lua_pushnil
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49 #endif
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50
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51 /*
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52 * Structure to keep state for each type of API
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53 */
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54 typedef struct Lpoll_state {
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55 int processed;
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56 #ifdef USE_EPOLL
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57 int epoll_fd;
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58 struct epoll_event events[MAX_EVENTS];
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59 #endif
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60 #ifdef USE_POLL
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61 nfds_t count;
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62 struct pollfd events[MAX_EVENTS];
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63 #endif
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64 #ifdef USE_SELECT
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65 fd_set wantread;
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66 fd_set wantwrite;
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67 fd_set readable;
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68 fd_set writable;
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69 fd_set all;
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70 fd_set err;
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71 #endif
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72 } Lpoll_state;
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73
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74 /*
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75 * Add an FD to be watched
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76 */
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77 static int Ladd(lua_State *L) {
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78 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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79 int fd = luaL_checkinteger(L, 2);
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80
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81 int wantread = lua_toboolean(L, 3);
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82 int wantwrite = lua_toboolean(L, 4);
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83
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84 if(fd < 0) {
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85 luaL_pushfail(L);
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86 lua_pushstring(L, strerror(EBADF));
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87 lua_pushinteger(L, EBADF);
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88 return 3;
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89 }
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90
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91 #ifdef USE_EPOLL
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92 struct epoll_event event;
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93 event.data.fd = fd;
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94 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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95
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96 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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97
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98 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_ADD, fd, &event);
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99
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100 if(ret < 0) {
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101 ret = errno;
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102 luaL_pushfail(L);
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103 lua_pushstring(L, strerror(ret));
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104 lua_pushinteger(L, ret);
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105 return 3;
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106 }
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107
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108 lua_pushboolean(L, 1);
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109 return 1;
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110
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111 #endif
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112 #ifdef USE_POLL
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113
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114 for(nfds_t i = 0; i < state->count; i++) {
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115 if(state->events[i].fd == fd) {
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116 luaL_pushfail(L);
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117 lua_pushstring(L, strerror(EEXIST));
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118 lua_pushinteger(L, EEXIST);
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119 return 3;
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120 }
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121 }
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122
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123 if(state->count >= MAX_EVENTS) {
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124 luaL_pushfail(L);
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125 lua_pushstring(L, strerror(EMFILE));
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126 lua_pushinteger(L, EMFILE);
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127 return 3;
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128 }
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129
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130 state->events[state->count].fd = fd;
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131 state->events[state->count].events = (wantread ? POLLIN : 0) | (wantwrite ? POLLOUT : 0);
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132 state->events[state->count].revents = 0;
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133 state->count++;
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134
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135 lua_pushboolean(L, 1);
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136 return 1;
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137 #endif
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138 #ifdef USE_SELECT
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139
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140 if(fd > FD_SETSIZE) {
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141 luaL_pushfail(L);
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142 lua_pushstring(L, strerror(EBADF));
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143 lua_pushinteger(L, EBADF);
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144 return 3;
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145 }
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146
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147 if(FD_ISSET(fd, &state->all)) {
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148 luaL_pushfail(L);
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149 lua_pushstring(L, strerror(EEXIST));
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150 lua_pushinteger(L, EEXIST);
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151 return 3;
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152 }
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153
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154 FD_CLR(fd, &state->readable);
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155 FD_CLR(fd, &state->writable);
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156 FD_CLR(fd, &state->err);
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157
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158 FD_SET(fd, &state->all);
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159
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160 if(wantread) {
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161 FD_SET(fd, &state->wantread);
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162 }
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163 else {
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164 FD_CLR(fd, &state->wantread);
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165 }
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166
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167 if(wantwrite) {
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168 FD_SET(fd, &state->wantwrite);
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169 }
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170 else {
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171 FD_CLR(fd, &state->wantwrite);
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172 }
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173
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174 lua_pushboolean(L, 1);
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175 return 1;
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176 #endif
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177 }
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178
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179 /*
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180 * Set events to watch for, readable and/or writable
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181 */
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182 static int Lset(lua_State *L) {
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183 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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184 int fd = luaL_checkinteger(L, 2);
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185
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186 #ifdef USE_EPOLL
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187
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188 int wantread = lua_toboolean(L, 3);
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189 int wantwrite = lua_toboolean(L, 4);
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190
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191 struct epoll_event event;
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192 event.data.fd = fd;
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193 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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194
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195 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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196
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197 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_MOD, fd, &event);
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198
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diff changeset
199 if(ret == 0) {
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200 lua_pushboolean(L, 1);
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201 return 1;
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202 }
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diff changeset
203 else {
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204 ret = errno;
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205 luaL_pushfail(L);
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206 lua_pushstring(L, strerror(ret));
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207 lua_pushinteger(L, ret);
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208 return 3;
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209 }
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210
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211 #endif
12316
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212 #ifdef USE_POLL
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213 int wantread = lua_toboolean(L, 3);
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214 int wantwrite = lua_toboolean(L, 4);
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215
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216 for(nfds_t i = 0; i < state->count; i++) {
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217 struct pollfd *event = &state->events[i];
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218
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219 if(event->fd == fd) {
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220 event->events = (wantread ? POLLIN : 0) | (wantwrite ? POLLOUT : 0);
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221 lua_pushboolean(L, 1);
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222 return 1;
6bb2f660f689 util.poll: Add support for the poll() API
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223 } else if(event->fd == -1) {
6bb2f660f689 util.poll: Add support for the poll() API
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diff changeset
224 break;
6bb2f660f689 util.poll: Add support for the poll() API
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225 }
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226 }
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227
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228 luaL_pushfail(L);
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229 lua_pushstring(L, strerror(ENOENT));
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230 lua_pushinteger(L, ENOENT);
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231 return 3;
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diff changeset
232 #endif
12314
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233 #ifdef USE_SELECT
9313
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234
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235 if(!FD_ISSET(fd, &state->all)) {
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236 luaL_pushfail(L);
9313
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237 lua_pushstring(L, strerror(ENOENT));
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238 lua_pushinteger(L, ENOENT);
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239 return 3;
9313
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240 }
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241
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diff changeset
242 if(!lua_isnoneornil(L, 3)) {
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diff changeset
243 if(lua_toboolean(L, 3)) {
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diff changeset
244 FD_SET(fd, &state->wantread);
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diff changeset
245 }
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parents:
diff changeset
246 else {
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247 FD_CLR(fd, &state->wantread);
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diff changeset
248 }
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249 }
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diff changeset
250
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parents:
diff changeset
251 if(!lua_isnoneornil(L, 4)) {
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parents:
diff changeset
252 if(lua_toboolean(L, 4)) {
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diff changeset
253 FD_SET(fd, &state->wantwrite);
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parents:
diff changeset
254 }
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parents:
diff changeset
255 else {
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diff changeset
256 FD_CLR(fd, &state->wantwrite);
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parents:
diff changeset
257 }
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parents:
diff changeset
258 }
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diff changeset
259
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diff changeset
260 lua_pushboolean(L, 1);
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parents:
diff changeset
261 return 1;
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parents:
diff changeset
262 #endif
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
263 }
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
264
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
265 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
266 * Remove FDs
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parents:
diff changeset
267 */
9954
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268 static int Ldel(lua_State *L) {
9313
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269 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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diff changeset
270 int fd = luaL_checkinteger(L, 2);
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271
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diff changeset
272 #ifdef USE_EPOLL
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273
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diff changeset
274 struct epoll_event event;
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diff changeset
275 event.data.fd = fd;
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276
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diff changeset
277 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_DEL, fd, &event);
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278
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parents:
diff changeset
279 if(ret == 0) {
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parents:
diff changeset
280 lua_pushboolean(L, 1);
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diff changeset
281 return 1;
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parents:
diff changeset
282 }
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parents:
diff changeset
283 else {
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diff changeset
284 ret = errno;
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285 luaL_pushfail(L);
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286 lua_pushstring(L, strerror(ret));
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287 lua_pushinteger(L, ret);
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288 return 3;
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289 }
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290
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291 #endif
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292 #ifdef USE_POLL
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293
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294 if(state->count == 0) {
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295 luaL_pushfail(L);
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296 lua_pushstring(L, strerror(ENOENT));
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297 lua_pushinteger(L, ENOENT);
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298 return 3;
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299 }
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300
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301 /*
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302 * Move the last item on top of the removed one
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303 */
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304 struct pollfd *last = &state->events[state->count - 1];
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305
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306 for(nfds_t i = 0; i < state->count; i++) {
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307 struct pollfd *event = &state->events[i];
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308
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309 if(event->fd == fd) {
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310 event->fd = last->fd;
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311 event->events = last->events;
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312 event->revents = last->revents;
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313 last->fd = -1;
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314 state->count--;
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315
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316 lua_pushboolean(L, 1);
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317 return 1;
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318 }
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319 }
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320
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321 luaL_pushfail(L);
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322 lua_pushstring(L, strerror(ENOENT));
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323 lua_pushinteger(L, ENOENT);
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324 return 3;
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325 #endif
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326 #ifdef USE_SELECT
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327
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328 if(!FD_ISSET(fd, &state->all)) {
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329 luaL_pushfail(L);
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330 lua_pushstring(L, strerror(ENOENT));
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331 lua_pushinteger(L, ENOENT);
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332 return 3;
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333 }
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334
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335 FD_CLR(fd, &state->wantread);
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336 FD_CLR(fd, &state->wantwrite);
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337 FD_CLR(fd, &state->readable);
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338 FD_CLR(fd, &state->writable);
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339 FD_CLR(fd, &state->all);
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340 FD_CLR(fd, &state->err);
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341
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342 lua_pushboolean(L, 1);
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343 return 1;
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344 #endif
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345 }
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346
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347
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348 /*
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349 * Check previously manipulated event state for FDs ready for reading or writing
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350 */
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351 static int Lpushevent(lua_State *L, struct Lpoll_state *state) {
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352 #ifdef USE_EPOLL
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353
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354 if(state->processed > 0) {
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355 state->processed--;
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356 struct epoll_event event = state->events[state->processed];
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357 lua_pushinteger(L, event.data.fd);
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358 lua_pushboolean(L, event.events & (EPOLLIN | EPOLLHUP | EPOLLRDHUP | EPOLLERR));
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359 lua_pushboolean(L, event.events & EPOLLOUT);
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360 return 3;
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361 }
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362
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363 #endif
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364 #ifdef USE_POLL
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365
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366 for(int i = state->processed - 1; i >= 0; i--) {
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367 struct pollfd *event = &state->events[i];
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368
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369 if(event->fd != -1 && event->revents != 0) {
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370 lua_pushinteger(L, event->fd);
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371 lua_pushboolean(L, event->revents & (POLLIN | POLLHUP | POLLERR));
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372 lua_pushboolean(L, event->revents & POLLOUT);
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373 event->revents = 0;
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374 state->processed = i;
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375 return 3;
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376 }
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377 }
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378
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379 #endif
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380 #ifdef USE_SELECT
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381
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382 for(int fd = state->processed + 1; fd < FD_SETSIZE; fd++) {
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diff changeset
383 if(FD_ISSET(fd, &state->readable) || FD_ISSET(fd, &state->writable) || FD_ISSET(fd, &state->err)) {
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diff changeset
384 lua_pushinteger(L, fd);
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385 lua_pushboolean(L, FD_ISSET(fd, &state->readable) | FD_ISSET(fd, &state->err));
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386 lua_pushboolean(L, FD_ISSET(fd, &state->writable));
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387 FD_CLR(fd, &state->readable);
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388 FD_CLR(fd, &state->writable);
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389 FD_CLR(fd, &state->err);
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diff changeset
390 state->processed = fd;
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391 return 3;
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diff changeset
392 }
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393 }
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diff changeset
394
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diff changeset
395 #endif
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diff changeset
396 return 0;
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diff changeset
397 }
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diff changeset
398
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diff changeset
399 /*
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
400 * Wait for event
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
401 */
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402 static int Lwait(lua_State *L) {
9313
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403 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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parents:
diff changeset
404
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diff changeset
405 int ret = Lpushevent(L, state);
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diff changeset
406
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
407 if(ret != 0) {
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parents:
diff changeset
408 return ret;
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
409 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
410
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
411 lua_Number timeout = luaL_checknumber(L, 2);
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diff changeset
412 luaL_argcheck(L, timeout >= 0, 1, "positive number expected");
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
413
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parents:
diff changeset
414 #ifdef USE_EPOLL
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diff changeset
415 ret = epoll_wait(state->epoll_fd, state->events, MAX_EVENTS, timeout * 1000);
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416 #endif
12316
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417 #ifdef USE_POLL
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418 ret = poll(state->events, state->count, timeout * 1000);
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diff changeset
419 #endif
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420 #ifdef USE_SELECT
9313
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diff changeset
421 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
422 * 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
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parents:
diff changeset
423 * have to recreate it manually every time a copy is made.
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diff changeset
424 */
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
425 memcpy(&state->readable, &state->wantread, sizeof(fd_set));
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parents:
diff changeset
426 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
427 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
428
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
429 struct timeval tv;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
430 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
431 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
432
9437
b202aa1e2d7b util.poll: Fix monitoring of socket exceptions in select mode
Kim Alvefur <zash@zash.se>
parents: 9318
diff changeset
433 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
434 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
435
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
436 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
437 /* Is this an error? */
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
438 lua_pushnil(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
439 lua_pushstring(L, "timeout");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
440 return 2;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
441 }
9508
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
442 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
443 /* Is this an error? */
9508
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
444 lua_pushnil(L);
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
445 lua_pushstring(L, "signal");
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
446 return 2;
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
447 }
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
448 else if(ret < 0) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
449 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
450 luaL_pushfail(L);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
451 lua_pushstring(L, strerror(ret));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
452 lua_pushinteger(L, ret);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
453 return 3;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
454 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
455
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
456 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
457 * 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
458 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
459 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
460 state->processed = ret;
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
461 #endif
12316
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
462 #ifdef USE_POLL
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
463 state->processed = state->count;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
464 #endif
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
465 #ifdef USE_SELECT
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
466 state->processed = -1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
467 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
468 return Lpushevent(L, state);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
469 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
470
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
471 #ifdef USE_EPOLL
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 * Return Epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
474 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
475 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
476 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
477 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
478 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
479 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
480
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
481 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
482 * Close epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
483 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
484 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
485 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
486
9478
bd178ed0459b util.poll: Fix inverted logic
Kim Alvefur <zash@zash.se>
parents: 9476
diff changeset
487 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
488 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
489 }
9b26a50cdfe3 util.poll: Early return from __gc in case of no valid epoll FD
Kim Alvefur <zash@zash.se>
parents: 9450
diff changeset
490
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
491 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
492 state->epoll_fd = -1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
493 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
494 else {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
495 lua_pushstring(L, strerror(errno));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
496 lua_error(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
497 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
498
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
499 return 0;
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 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
502
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 * String representation
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
505 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
506 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
507 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
508 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
509 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
510 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
511
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
512 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
513 * Create a new context
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
514 */
9954
36280801ddf1 util.poll: Minimize scope of methods
Kim Alvefur <zash@zash.se>
parents: 9508
diff changeset
515 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
516 /* Allocate state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
517 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
518 luaL_setmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
519
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
520 /* Initialize state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
521 #ifdef USE_EPOLL
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
522 state->epoll_fd = -1;
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
523 state->processed = 0;
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
524
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
525 int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
526
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
527 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
528 luaL_pushfail(L);
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
529 lua_pushstring(L, strerror(errno));
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
530 lua_pushinteger(L, errno);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
531 return 3;
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
532 }
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
533
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
534 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
535 #endif
12316
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
536 #ifdef USE_POLL
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
537 state->processed = -1;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
538 state->count = 0;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
539
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
540 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
541 state->events[i].fd = -1;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
542 state->events[i].events = 0;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
543 state->events[i].revents = 0;
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
544 }
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
545
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
546 #endif
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
547 #ifdef USE_SELECT
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
548 FD_ZERO(&state->wantread);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
549 FD_ZERO(&state->wantwrite);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
550 FD_ZERO(&state->readable);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
551 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
552 FD_ZERO(&state->all);
352e8b75c1ae util.poll: Zero FD sets watched for errors on creation
Kim Alvefur <zash@zash.se>
parents: 9447
diff changeset
553 FD_ZERO(&state->err);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
554 state->processed = FD_SETSIZE;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
555 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
556
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
557 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
558 }
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 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
561 * Open library
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 int luaopen_util_poll(lua_State *L) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
564 luaL_checkversion(L);
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 luaL_newmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
567 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
568
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
569 lua_pushliteral(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
570 lua_setfield(L, -2, "__name");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
571
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
572 lua_pushcfunction(L, Ltos);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
573 lua_setfield(L, -2, "__tostring");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
574
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
575 lua_createtable(L, 0, 2);
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, Ladd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
578 lua_setfield(L, -2, "add");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
579 lua_pushcfunction(L, Lset);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
580 lua_setfield(L, -2, "set");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
581 lua_pushcfunction(L, Ldel);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
582 lua_setfield(L, -2, "del");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
583 lua_pushcfunction(L, Lwait);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
584 lua_setfield(L, -2, "wait");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
585 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
586 lua_pushcfunction(L, Lgetfd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
587 lua_setfield(L, -2, "getfd");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
588 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
589 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
590 lua_setfield(L, -2, "__index");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
591
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
592 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
593 lua_pushcfunction(L, Lgc);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
594 lua_setfield(L, -2, "__gc");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
595 #endif
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
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
598 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
599 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
600 lua_pushcfunction(L, Lnew);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
601 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
602
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
603 #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
604 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
605
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
606 push_errno(EEXIST);
12316
6bb2f660f689 util.poll: Add support for the poll() API
Kim Alvefur <zash@zash.se>
parents: 12315
diff changeset
607 push_errno(EMFILE);
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
608 push_errno(ENOENT);
9506
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
609
12315
cf2086a1bd45 util.poll: Expose API (epoll or select) used
Kim Alvefur <zash@zash.se>
parents: 12314
diff changeset
610 lua_pushliteral(L, POLL_BACKEND);
cf2086a1bd45 util.poll: Expose API (epoll or select) used
Kim Alvefur <zash@zash.se>
parents: 12314
diff changeset
611 lua_setfield(L, -2, "api");
cf2086a1bd45 util.poll: Expose API (epoll or select) used
Kim Alvefur <zash@zash.se>
parents: 12314
diff changeset
612
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
613 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
614 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
615 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
616