prosody
6dcc45a2e3bc
util-src/poll.c

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util-src/poll.c @ 11609:6dcc45a2e3bc

mod_s2s: Bail if connection is destroyed after attempting to open stream Fixes "attempt to compare number with nil" because `session.version` has been cleared by s2smanager.destroy_session. This can happen with the server_epoll setting opportunistic_writes enabled, which means that it can notice that the connection failed at this point, after which it triggers the whole chain of events that leads to session destruction and "cleaning" most of the session fields.
author Kim Alvefur <zash@zash.se>
date Wed, 16 Jun 2021 23:53:00 +0200
parent 10921:6eb5d2bb11af
child 12314:898554323338
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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) 2017-2018 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 #if (LUA_VERSION_NUM < 504)
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41 #define luaL_pushfail lua_pushnil
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42 #endif
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43
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44 /*
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45 * Structure to keep state for each type of API
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46 */
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47 typedef struct Lpoll_state {
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48 int processed;
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49 #ifdef USE_EPOLL
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50 int epoll_fd;
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51 struct epoll_event events[MAX_EVENTS];
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52 #else
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53 fd_set wantread;
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54 fd_set wantwrite;
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55 fd_set readable;
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56 fd_set writable;
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57 fd_set all;
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58 fd_set err;
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59 #endif
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60 } Lpoll_state;
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61
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62 /*
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63 * Add an FD to be watched
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64 */
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65 static int Ladd(lua_State *L) {
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66 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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67 int fd = luaL_checkinteger(L, 2);
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68
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69 int wantread = lua_toboolean(L, 3);
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70 int wantwrite = lua_toboolean(L, 4);
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71
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72 if(fd < 0) {
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73 luaL_pushfail(L);
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74 lua_pushstring(L, strerror(EBADF));
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75 lua_pushinteger(L, EBADF);
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76 return 3;
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77 }
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78
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79 #ifdef USE_EPOLL
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80 struct epoll_event event;
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81 event.data.fd = fd;
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82 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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83
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84 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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85
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86 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_ADD, fd, &event);
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87
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88 if(ret < 0) {
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89 ret = errno;
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90 luaL_pushfail(L);
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91 lua_pushstring(L, strerror(ret));
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92 lua_pushinteger(L, ret);
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93 return 3;
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94 }
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95
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96 lua_pushboolean(L, 1);
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97 return 1;
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98
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99 #else
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100
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101 if(fd > FD_SETSIZE) {
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102 luaL_pushfail(L);
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103 lua_pushstring(L, strerror(EBADF));
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104 lua_pushinteger(L, EBADF);
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105 return 3;
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106 }
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107
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108 if(FD_ISSET(fd, &state->all)) {
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109 luaL_pushfail(L);
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110 lua_pushstring(L, strerror(EEXIST));
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111 lua_pushinteger(L, EEXIST);
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112 return 3;
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113 }
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114
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115 FD_CLR(fd, &state->readable);
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116 FD_CLR(fd, &state->writable);
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117 FD_CLR(fd, &state->err);
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118
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119 FD_SET(fd, &state->all);
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120
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121 if(wantread) {
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122 FD_SET(fd, &state->wantread);
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123 }
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124 else {
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125 FD_CLR(fd, &state->wantread);
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126 }
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127
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128 if(wantwrite) {
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129 FD_SET(fd, &state->wantwrite);
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130 }
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131 else {
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132 FD_CLR(fd, &state->wantwrite);
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133 }
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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 }
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139
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140 /*
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141 * Set events to watch for, readable and/or writable
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142 */
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143 static int Lset(lua_State *L) {
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144 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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145 int fd = luaL_checkinteger(L, 2);
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146
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147 #ifdef USE_EPOLL
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148
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149 int wantread = lua_toboolean(L, 3);
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150 int wantwrite = lua_toboolean(L, 4);
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151
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152 struct epoll_event event;
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153 event.data.fd = fd;
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154 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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155
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156 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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157
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158 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_MOD, fd, &event);
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159
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160 if(ret == 0) {
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161 lua_pushboolean(L, 1);
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162 return 1;
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163 }
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164 else {
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165 ret = errno;
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166 luaL_pushfail(L);
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167 lua_pushstring(L, strerror(ret));
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168 lua_pushinteger(L, ret);
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169 return 3;
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170 }
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171
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172 #else
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173
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174 if(!FD_ISSET(fd, &state->all)) {
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175 luaL_pushfail(L);
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176 lua_pushstring(L, strerror(ENOENT));
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177 lua_pushinteger(L, ENOENT);
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178 return 3;
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179 }
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180
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181 if(!lua_isnoneornil(L, 3)) {
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182 if(lua_toboolean(L, 3)) {
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183 FD_SET(fd, &state->wantread);
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184 }
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185 else {
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186 FD_CLR(fd, &state->wantread);
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187 }
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188 }
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189
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190 if(!lua_isnoneornil(L, 4)) {
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191 if(lua_toboolean(L, 4)) {
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192 FD_SET(fd, &state->wantwrite);
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193 }
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194 else {
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195 FD_CLR(fd, &state->wantwrite);
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196 }
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197 }
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198
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199 lua_pushboolean(L, 1);
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200 return 1;
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201 #endif
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202 }
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203
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204 /*
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205 * Remove FDs
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206 */
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207 static int Ldel(lua_State *L) {
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208 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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209 int fd = luaL_checkinteger(L, 2);
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210
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211 #ifdef USE_EPOLL
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212
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213 struct epoll_event event;
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214 event.data.fd = fd;
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215
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216 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_DEL, fd, &event);
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217
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218 if(ret == 0) {
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219 lua_pushboolean(L, 1);
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220 return 1;
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221 }
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222 else {
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223 ret = errno;
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224 luaL_pushfail(L);
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225 lua_pushstring(L, strerror(ret));
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226 lua_pushinteger(L, ret);
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227 return 3;
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228 }
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229
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230 #else
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231
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232 if(!FD_ISSET(fd, &state->all)) {
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233 luaL_pushfail(L);
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234 lua_pushstring(L, strerror(ENOENT));
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235 lua_pushinteger(L, ENOENT);
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236 return 3;
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237 }
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238
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239 FD_CLR(fd, &state->wantread);
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240 FD_CLR(fd, &state->wantwrite);
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241 FD_CLR(fd, &state->readable);
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242 FD_CLR(fd, &state->writable);
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243 FD_CLR(fd, &state->all);
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244 FD_CLR(fd, &state->err);
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245
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246 lua_pushboolean(L, 1);
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247 return 1;
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248 #endif
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249 }
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250
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251
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252 /*
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253 * Check previously manipulated event state for FDs ready for reading or writing
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254 */
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255 static int Lpushevent(lua_State *L, struct Lpoll_state *state) {
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256 #ifdef USE_EPOLL
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257
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258 if(state->processed > 0) {
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259 state->processed--;
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260 struct epoll_event event = state->events[state->processed];
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261 lua_pushinteger(L, event.data.fd);
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262 lua_pushboolean(L, event.events & (EPOLLIN | EPOLLHUP | EPOLLRDHUP | EPOLLERR));
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263 lua_pushboolean(L, event.events & EPOLLOUT);
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264 return 3;
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265 }
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266
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267 #else
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268
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269 for(int fd = state->processed + 1; fd < FD_SETSIZE; fd++) {
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270 if(FD_ISSET(fd, &state->readable) || FD_ISSET(fd, &state->writable) || FD_ISSET(fd, &state->err)) {
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271 lua_pushinteger(L, fd);
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272 lua_pushboolean(L, FD_ISSET(fd, &state->readable) | FD_ISSET(fd, &state->err));
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273 lua_pushboolean(L, FD_ISSET(fd, &state->writable));
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274 FD_CLR(fd, &state->readable);
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275 FD_CLR(fd, &state->writable);
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276 FD_CLR(fd, &state->err);
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277 state->processed = fd;
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278 return 3;
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279 }
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280 }
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281
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282 #endif
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283 return 0;
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284 }
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285
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286 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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287 * Wait for event
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288 */
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289 static int Lwait(lua_State *L) {
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290 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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291
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diff changeset
292 int ret = Lpushevent(L, state);
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293
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diff changeset
294 if(ret != 0) {
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295 return ret;
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296 }
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297
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298 lua_Number timeout = luaL_checknumber(L, 2);
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299 luaL_argcheck(L, timeout >= 0, 1, "positive number expected");
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300
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diff changeset
301 #ifdef USE_EPOLL
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302 ret = epoll_wait(state->epoll_fd, state->events, MAX_EVENTS, timeout * 1000);
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303 #else
b95ef295c66d util.poll: Import poll library with epoll and select support
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304 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
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305 * 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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306 * have to recreate it manually every time a copy is made.
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307 */
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308 memcpy(&state->readable, &state->wantread, sizeof(fd_set));
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309 memcpy(&state->writable, &state->wantwrite, sizeof(fd_set));
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310 memcpy(&state->err, &state->all, sizeof(fd_set));
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311
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312 struct timeval tv;
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313 tv.tv_sec = (time_t)timeout;
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314 tv.tv_usec = ((suseconds_t)(timeout * 1000000)) % 1000000;
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315
9437
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316 ret = select(FD_SETSIZE, &state->readable, &state->writable, &state->err, &tv);
9313
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317 #endif
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318
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319 if(ret == 0) {
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320 /* Is this an error? */
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321 lua_pushnil(L);
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322 lua_pushstring(L, "timeout");
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323 return 2;
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324 }
9508
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325 else if(ret < 0 && errno == EINTR) {
10921
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326 /* Is this an error? */
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diff changeset
327 lua_pushnil(L);
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328 lua_pushstring(L, "signal");
2055b497b515 net.server_epoll: Special handling of signal interrupts
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diff changeset
329 return 2;
2055b497b515 net.server_epoll: Special handling of signal interrupts
Kim Alvefur <zash@zash.se>
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diff changeset
330 }
9313
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diff changeset
331 else if(ret < 0) {
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diff changeset
332 ret = errno;
10921
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333 luaL_pushfail(L);
9313
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334 lua_pushstring(L, strerror(ret));
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diff changeset
335 lua_pushinteger(L, ret);
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diff changeset
336 return 3;
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
337 }
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
338
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
339 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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340 * 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>
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diff changeset
341 */
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Kim Alvefur <zash@zash.se>
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diff changeset
342 #ifdef USE_EPOLL
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Kim Alvefur <zash@zash.se>
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diff changeset
343 state->processed = ret;
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diff changeset
344 #else
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diff changeset
345 state->processed = -1;
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diff changeset
346 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
347 return Lpushevent(L, state);
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diff changeset
348 }
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
349
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
350 #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
351 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
352 * Return Epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
353 */
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354 static int Lgetfd(lua_State *L) {
9313
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355 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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Kim Alvefur <zash@zash.se>
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356 lua_pushinteger(L, state->epoll_fd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
357 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
358 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
359
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
360 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
361 * Close epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
362 */
9954
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diff changeset
363 static int Lgc(lua_State *L) {
9313
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diff changeset
364 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
365
9478
bd178ed0459b util.poll: Fix inverted logic
Kim Alvefur <zash@zash.se>
parents: 9476
diff changeset
366 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
367 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
368 }
9b26a50cdfe3 util.poll: Early return from __gc in case of no valid epoll FD
Kim Alvefur <zash@zash.se>
parents: 9450
diff changeset
369
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
370 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
371 state->epoll_fd = -1;
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 else {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
374 lua_pushstring(L, strerror(errno));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
375 lua_error(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
376 }
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 return 0;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
379 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
380 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
381
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 * String representation
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
384 */
9954
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diff changeset
385 static int Ltos(lua_State *L) {
9313
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
386 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
387 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
388 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
389 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
390
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 * Create a new context
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
393 */
9954
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diff changeset
394 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
395 /* Allocate state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
396 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
397 luaL_setmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
398
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
399 /* Initialize state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
400 #ifdef USE_EPOLL
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
401 state->epoll_fd = -1;
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
402 state->processed = 0;
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
403
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
404 int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
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 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
407 luaL_pushfail(L);
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
408 lua_pushstring(L, strerror(errno));
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
409 lua_pushinteger(L, errno);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
410 return 3;
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
411 }
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
412
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
413 state->epoll_fd = epoll_fd;
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
414 #else
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
415 FD_ZERO(&state->wantread);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
416 FD_ZERO(&state->wantwrite);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
417 FD_ZERO(&state->readable);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
418 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
419 FD_ZERO(&state->all);
352e8b75c1ae util.poll: Zero FD sets watched for errors on creation
Kim Alvefur <zash@zash.se>
parents: 9447
diff changeset
420 FD_ZERO(&state->err);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
421 state->processed = FD_SETSIZE;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
422 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
423
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
424 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
425 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
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426
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
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427 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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428 * Open library
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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429 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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430 int luaopen_util_poll(lua_State *L) {
9318
3429006518bf util.poll: Lua 5.1 compat
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parents: 9317
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431 #if (LUA_VERSION_NUM > 501)
9313
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432 luaL_checkversion(L);
9318
3429006518bf util.poll: Lua 5.1 compat
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433 #endif
9313
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
434
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
435 luaL_newmetatable(L, STATE_MT);
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
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
438 lua_pushliteral(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
439 lua_setfield(L, -2, "__name");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
440
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
441 lua_pushcfunction(L, Ltos);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
442 lua_setfield(L, -2, "__tostring");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
443
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
444 lua_createtable(L, 0, 2);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
445 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
446 lua_pushcfunction(L, Ladd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
447 lua_setfield(L, -2, "add");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
448 lua_pushcfunction(L, Lset);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
449 lua_setfield(L, -2, "set");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
450 lua_pushcfunction(L, Ldel);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
451 lua_setfield(L, -2, "del");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
452 lua_pushcfunction(L, Lwait);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
453 lua_setfield(L, -2, "wait");
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, Lgetfd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
456 lua_setfield(L, -2, "getfd");
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 lua_setfield(L, -2, "__index");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
460
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
461 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
462 lua_pushcfunction(L, Lgc);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
463 lua_setfield(L, -2, "__gc");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
464 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
465 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
466
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
467 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
468 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
469 lua_pushcfunction(L, Lnew);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
470 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
471
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
472 #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
473 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
474
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
475 push_errno(EEXIST);
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
476 push_errno(ENOENT);
9506
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
477
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
478 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
479 return 1;
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