prosody
161411a41377
util-src/poll.c

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util-src/poll.c @ 9781:161411a41377

util.prosodyctl: Allow passing path to Lua runtime to the start() function By default the shebang is used. Being able to override it is useful in cases where the shebang does not match the configured runtime.
author Kim Alvefur <zash@zash.se>
date Thu, 10 Jan 2019 14:57:26 +0100
parent 9508:2055b497b515
child 9954:36280801ddf1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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) 2017-2018 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 #ifdef __linux__
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16 #define USE_EPOLL
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17 #endif
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18
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19 #ifdef USE_EPOLL
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20 #include <sys/epoll.h>
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21 #ifndef MAX_EVENTS
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22 #define MAX_EVENTS 64
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23 #endif
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24 #else
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25 #include <sys/select.h>
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26 #endif
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27
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28 #include <lualib.h>
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29 #include <lauxlib.h>
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30
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31 #ifdef USE_EPOLL
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32 #define STATE_MT "util.poll<epoll>"
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33 #else
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34 #define STATE_MT "util.poll<select>"
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35 #endif
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36
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37 #if (LUA_VERSION_NUM == 501)
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38 #define luaL_setmetatable(L, tname) luaL_getmetatable(L, tname); lua_setmetatable(L, -2)
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39 #endif
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40
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41 /*
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42 * Structure to keep state for each type of API
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43 */
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44 typedef struct Lpoll_state {
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45 int processed;
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46 #ifdef USE_EPOLL
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47 int epoll_fd;
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48 struct epoll_event events[MAX_EVENTS];
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49 #else
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50 fd_set wantread;
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51 fd_set wantwrite;
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52 fd_set readable;
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53 fd_set writable;
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54 fd_set all;
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55 fd_set err;
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56 #endif
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57 } Lpoll_state;
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58
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59 /*
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60 * Add an FD to be watched
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61 */
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62 int Ladd(lua_State *L) {
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63 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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64 int fd = luaL_checkinteger(L, 2);
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65
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66 int wantread = lua_toboolean(L, 3);
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67 int wantwrite = lua_toboolean(L, 4);
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68
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69 if(fd < 0) {
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70 lua_pushnil(L);
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71 lua_pushstring(L, strerror(EBADF));
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72 lua_pushinteger(L, EBADF);
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73 return 3;
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74 }
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75
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76 #ifdef USE_EPOLL
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77 struct epoll_event event;
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78 event.data.fd = fd;
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79 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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80
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81 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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82
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83 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_ADD, fd, &event);
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84
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85 if(ret < 0) {
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86 ret = errno;
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87 lua_pushnil(L);
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88 lua_pushstring(L, strerror(ret));
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89 lua_pushinteger(L, ret);
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90 return 3;
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91 }
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92
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93 lua_pushboolean(L, 1);
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94 return 1;
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95
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96 #else
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97
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98 if(fd > FD_SETSIZE) {
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99 lua_pushnil(L);
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100 lua_pushstring(L, strerror(EBADF));
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101 lua_pushinteger(L, EBADF);
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102 return 3;
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103 }
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104
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105 if(FD_ISSET(fd, &state->all)) {
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106 lua_pushnil(L);
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107 lua_pushstring(L, strerror(EEXIST));
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108 lua_pushinteger(L, EEXIST);
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109 return 3;
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110 }
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111
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112 FD_CLR(fd, &state->readable);
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113 FD_CLR(fd, &state->writable);
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114 FD_CLR(fd, &state->err);
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115
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116 FD_SET(fd, &state->all);
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117
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118 if(wantread) {
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119 FD_SET(fd, &state->wantread);
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120 }
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121 else {
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122 FD_CLR(fd, &state->wantread);
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123 }
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124
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125 if(wantwrite) {
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126 FD_SET(fd, &state->wantwrite);
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127 }
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128 else {
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129 FD_CLR(fd, &state->wantwrite);
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130 }
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131
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132 lua_pushboolean(L, 1);
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133 return 1;
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134 #endif
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135 }
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136
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137 /*
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138 * Set events to watch for, readable and/or writable
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139 */
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140 int Lset(lua_State *L) {
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141 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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142 int fd = luaL_checkinteger(L, 2);
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143
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144 #ifdef USE_EPOLL
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145
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146 int wantread = lua_toboolean(L, 3);
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147 int wantwrite = lua_toboolean(L, 4);
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148
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149 struct epoll_event event;
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150 event.data.fd = fd;
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151 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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152
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153 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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154
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155 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_MOD, fd, &event);
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156
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157 if(ret == 0) {
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158 lua_pushboolean(L, 1);
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159 return 1;
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160 }
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161 else {
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162 ret = errno;
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163 lua_pushnil(L);
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164 lua_pushstring(L, strerror(ret));
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165 lua_pushinteger(L, ret);
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166 return 3;
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167 }
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168
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169 #else
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170
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171 if(!FD_ISSET(fd, &state->all)) {
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172 lua_pushnil(L);
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173 lua_pushstring(L, strerror(ENOENT));
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174 lua_pushinteger(L, ENOENT);
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175 }
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176
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177 if(!lua_isnoneornil(L, 3)) {
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178 if(lua_toboolean(L, 3)) {
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179 FD_SET(fd, &state->wantread);
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180 }
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181 else {
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182 FD_CLR(fd, &state->wantread);
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183 }
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184 }
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185
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186 if(!lua_isnoneornil(L, 4)) {
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187 if(lua_toboolean(L, 4)) {
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188 FD_SET(fd, &state->wantwrite);
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189 }
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190 else {
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191 FD_CLR(fd, &state->wantwrite);
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192 }
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193 }
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194
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195 lua_pushboolean(L, 1);
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196 return 1;
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197 #endif
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198 }
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199
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200 /*
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201 * Remove FDs
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202 */
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203 int Ldel(lua_State *L) {
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204 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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205 int fd = luaL_checkinteger(L, 2);
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206
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207 #ifdef USE_EPOLL
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208
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209 struct epoll_event event;
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210 event.data.fd = fd;
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211
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212 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_DEL, fd, &event);
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213
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214 if(ret == 0) {
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215 lua_pushboolean(L, 1);
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216 return 1;
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217 }
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218 else {
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219 ret = errno;
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220 lua_pushnil(L);
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221 lua_pushstring(L, strerror(ret));
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222 lua_pushinteger(L, ret);
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223 return 3;
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224 }
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225
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226 #else
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227
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228 if(!FD_ISSET(fd, &state->all)) {
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229 lua_pushnil(L);
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230 lua_pushstring(L, strerror(ENOENT));
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231 lua_pushinteger(L, ENOENT);
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232 }
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233
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234 FD_CLR(fd, &state->wantread);
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235 FD_CLR(fd, &state->wantwrite);
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236 FD_CLR(fd, &state->readable);
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237 FD_CLR(fd, &state->writable);
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238 FD_CLR(fd, &state->all);
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239 FD_CLR(fd, &state->err);
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240
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241 lua_pushboolean(L, 1);
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242 return 1;
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243 #endif
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244 }
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245
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246
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247 /*
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248 * Check previously manipulated event state for FDs ready for reading or writing
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249 */
9317
d8496858c809 util.poll: Remove 'inline' from function declaration
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parents: 9313
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250 int Lpushevent(lua_State *L, struct Lpoll_state *state) {
9313
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251 #ifdef USE_EPOLL
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252
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253 if(state->processed > 0) {
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254 state->processed--;
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255 struct epoll_event event = state->events[state->processed];
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256 lua_pushinteger(L, event.data.fd);
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257 lua_pushboolean(L, event.events & (EPOLLIN | EPOLLHUP | EPOLLRDHUP | EPOLLERR));
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258 lua_pushboolean(L, event.events & EPOLLOUT);
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259 return 3;
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260 }
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261
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262 #else
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263
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264 for(int fd = state->processed + 1; fd < FD_SETSIZE; fd++) {
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265 if(FD_ISSET(fd, &state->readable) || FD_ISSET(fd, &state->writable) || FD_ISSET(fd, &state->err)) {
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266 lua_pushinteger(L, fd);
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267 lua_pushboolean(L, FD_ISSET(fd, &state->readable) | FD_ISSET(fd, &state->err));
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268 lua_pushboolean(L, FD_ISSET(fd, &state->writable));
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269 FD_CLR(fd, &state->readable);
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270 FD_CLR(fd, &state->writable);
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271 FD_CLR(fd, &state->err);
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272 state->processed = fd;
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273 return 3;
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274 }
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275 }
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276
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277 #endif
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278 return 0;
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279 }
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280
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parents:
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281 /*
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parents:
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282 * Wait for event
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283 */
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284 int Lwait(lua_State *L) {
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285 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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286
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287 int ret = Lpushevent(L, state);
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288
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
289 if(ret != 0) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
290 return ret;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
291 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
292
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
293 lua_Number timeout = luaL_checknumber(L, 2);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
294 luaL_argcheck(L, timeout >= 0, 1, "positive number expected");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
295
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
296 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
297 ret = epoll_wait(state->epoll_fd, state->events, MAX_EVENTS, timeout * 1000);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
298 #else
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
299 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
300 * 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
301 * 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
302 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
303 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
304 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
305 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
306
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
307 struct timeval tv;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
308 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
309 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
310
9437
b202aa1e2d7b util.poll: Fix monitoring of socket exceptions in select mode
Kim Alvefur <zash@zash.se>
parents: 9318
diff changeset
311 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
312 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
314 if(ret == 0) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
315 lua_pushnil(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
316 lua_pushstring(L, "timeout");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
317 return 2;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
318 }
9508
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
319 else if(ret < 0 && errno == EINTR) {
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
320 lua_pushnil(L);
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
321 lua_pushstring(L, "signal");
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
322 return 2;
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
parents: 9507
diff changeset
323 }
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
324 else if(ret < 0) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
325 ret = errno;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
326 lua_pushnil(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
327 lua_pushstring(L, strerror(ret));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
328 lua_pushinteger(L, ret);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
329 return 3;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
330 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
331
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
332 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
333 * 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
334 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
335 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
336 state->processed = ret;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
337 #else
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
338 state->processed = -1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
339 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
340 return Lpushevent(L, state);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
341 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
342
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
343 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
344 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
345 * Return Epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
346 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
347 int Lgetfd(lua_State *L) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
348 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
349 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
350 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
351 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
352
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
353 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
354 * Close epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
355 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
356 int Lgc(lua_State *L) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
357 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
358
9478
bd178ed0459b util.poll: Fix inverted logic
Kim Alvefur <zash@zash.se>
parents: 9476
diff changeset
359 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
360 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
361 }
9b26a50cdfe3 util.poll: Early return from __gc in case of no valid epoll FD
Kim Alvefur <zash@zash.se>
parents: 9450
diff changeset
362
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
363 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
364 state->epoll_fd = -1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
365 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
366 else {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
367 lua_pushstring(L, strerror(errno));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
368 lua_error(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
369 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
370
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
371 return 0;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
372 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
373 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
374
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
375 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
376 * String representation
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
377 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
378 int Ltos(lua_State *L) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
379 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
380 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
381 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
382 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
383
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
384 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
385 * Create a new context
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
386 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
387 int Lnew(lua_State *L) {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
388 /* Allocate state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
389 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
390 luaL_setmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
391
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
392 /* Initialize state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
393 #ifdef USE_EPOLL
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
394 state->epoll_fd = -1;
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
395 state->processed = 0;
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
396
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
397 int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
398
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
399 if(epoll_fd <= 0) {
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
400 lua_pushnil(L);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
401 lua_pushstring(L, strerror(errno));
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
402 lua_pushinteger(L, errno);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
403 return 3;
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
404 }
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
405
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
406 state->epoll_fd = epoll_fd;
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
407 #else
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
408 FD_ZERO(&state->wantread);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
409 FD_ZERO(&state->wantwrite);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
410 FD_ZERO(&state->readable);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
411 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
412 FD_ZERO(&state->all);
352e8b75c1ae util.poll: Zero FD sets watched for errors on creation
Kim Alvefur <zash@zash.se>
parents: 9447
diff changeset
413 FD_ZERO(&state->err);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
414 state->processed = FD_SETSIZE;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
415 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
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 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
418 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
419
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
420 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
421 * Open library
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
422 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
423 int luaopen_util_poll(lua_State *L) {
9318
3429006518bf util.poll: Lua 5.1 compat
Kim Alvefur <zash@zash.se>
parents: 9317
diff changeset
424 #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
425 luaL_checkversion(L);
9318
3429006518bf util.poll: Lua 5.1 compat
Kim Alvefur <zash@zash.se>
parents: 9317
diff changeset
426 #endif
9313
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 luaL_newmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
429 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
430
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
431 lua_pushliteral(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
432 lua_setfield(L, -2, "__name");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
433
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
434 lua_pushcfunction(L, Ltos);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
435 lua_setfield(L, -2, "__tostring");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
436
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
437 lua_createtable(L, 0, 2);
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 lua_pushcfunction(L, Ladd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
440 lua_setfield(L, -2, "add");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
441 lua_pushcfunction(L, Lset);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
442 lua_setfield(L, -2, "set");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
443 lua_pushcfunction(L, Ldel);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
444 lua_setfield(L, -2, "del");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
445 lua_pushcfunction(L, Lwait);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
446 lua_setfield(L, -2, "wait");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
447 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
448 lua_pushcfunction(L, Lgetfd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
449 lua_setfield(L, -2, "getfd");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
450 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
451 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
452 lua_setfield(L, -2, "__index");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
453
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
454 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
455 lua_pushcfunction(L, Lgc);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
456 lua_setfield(L, -2, "__gc");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
457 #endif
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
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
460 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
461 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
462 lua_pushcfunction(L, Lnew);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
463 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
464
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
465 #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
466 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
467
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
468 push_errno(EEXIST);
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
469 push_errno(ENOENT);
9506
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
470
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
471 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
472 return 1;
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