prosody
898554323338
util-src/poll.c

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util-src/poll.c @ 12314:898554323338

util.poll: Restructure to make adding additional system APIs easier
author Kim Alvefur <zash@zash.se>
date Wed, 23 Feb 2022 20:30:22 +0100
parent 10921:6eb5d2bb11af
child 12315:cf2086a1bd45
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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 #if defined(__linux__)
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16 #define USE_EPOLL
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17 #else
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18 #define USE_SELECT
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19 #endif
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20
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21 #ifdef USE_EPOLL
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22 #include <sys/epoll.h>
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23 #ifndef MAX_EVENTS
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24 #define MAX_EVENTS 64
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25 #endif
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26 #endif
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27 #ifdef USE_SELECT
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28 #include <sys/select.h>
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29 #endif
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30
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31 #include <lualib.h>
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32 #include <lauxlib.h>
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33
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34 #ifdef USE_EPOLL
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35 #define STATE_MT "util.poll<epoll>"
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36 #endif
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37 #ifdef USE_SELECT
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38 #define STATE_MT "util.poll<select>"
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39 #endif
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40
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41 #if (LUA_VERSION_NUM == 501)
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42 #define luaL_setmetatable(L, tname) luaL_getmetatable(L, tname); lua_setmetatable(L, -2)
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43 #endif
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44 #if (LUA_VERSION_NUM < 504)
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45 #define luaL_pushfail lua_pushnil
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46 #endif
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47
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48 /*
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49 * Structure to keep state for each type of API
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50 */
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51 typedef struct Lpoll_state {
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52 int processed;
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53 #ifdef USE_EPOLL
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54 int epoll_fd;
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55 struct epoll_event events[MAX_EVENTS];
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56 #endif
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57 #ifdef USE_SELECT
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58 fd_set wantread;
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59 fd_set wantwrite;
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60 fd_set readable;
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61 fd_set writable;
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62 fd_set all;
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63 fd_set err;
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64 #endif
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65 } Lpoll_state;
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66
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67 /*
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68 * Add an FD to be watched
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69 */
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70 static int Ladd(lua_State *L) {
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71 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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72 int fd = luaL_checkinteger(L, 2);
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73
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74 int wantread = lua_toboolean(L, 3);
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75 int wantwrite = lua_toboolean(L, 4);
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76
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77 if(fd < 0) {
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78 luaL_pushfail(L);
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79 lua_pushstring(L, strerror(EBADF));
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80 lua_pushinteger(L, EBADF);
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81 return 3;
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82 }
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83
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84 #ifdef USE_EPOLL
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85 struct epoll_event event;
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86 event.data.fd = fd;
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87 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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88
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89 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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90
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91 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_ADD, fd, &event);
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92
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93 if(ret < 0) {
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94 ret = errno;
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95 luaL_pushfail(L);
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96 lua_pushstring(L, strerror(ret));
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97 lua_pushinteger(L, ret);
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98 return 3;
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99 }
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100
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101 lua_pushboolean(L, 1);
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102 return 1;
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103
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104 #endif
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105 #ifdef USE_SELECT
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106
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107 if(fd > FD_SETSIZE) {
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108 luaL_pushfail(L);
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109 lua_pushstring(L, strerror(EBADF));
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110 lua_pushinteger(L, EBADF);
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111 return 3;
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112 }
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113
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114 if(FD_ISSET(fd, &state->all)) {
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115 luaL_pushfail(L);
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116 lua_pushstring(L, strerror(EEXIST));
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117 lua_pushinteger(L, EEXIST);
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118 return 3;
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119 }
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120
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121 FD_CLR(fd, &state->readable);
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122 FD_CLR(fd, &state->writable);
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123 FD_CLR(fd, &state->err);
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124
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125 FD_SET(fd, &state->all);
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126
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127 if(wantread) {
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128 FD_SET(fd, &state->wantread);
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129 }
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130 else {
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131 FD_CLR(fd, &state->wantread);
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132 }
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133
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134 if(wantwrite) {
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135 FD_SET(fd, &state->wantwrite);
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136 }
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137 else {
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138 FD_CLR(fd, &state->wantwrite);
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139 }
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140
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141 lua_pushboolean(L, 1);
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142 return 1;
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143 #endif
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144 }
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145
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146 /*
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147 * Set events to watch for, readable and/or writable
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148 */
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149 static int Lset(lua_State *L) {
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150 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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151 int fd = luaL_checkinteger(L, 2);
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152
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153 #ifdef USE_EPOLL
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154
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155 int wantread = lua_toboolean(L, 3);
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156 int wantwrite = lua_toboolean(L, 4);
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157
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158 struct epoll_event event;
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159 event.data.fd = fd;
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160 event.events = (wantread ? EPOLLIN : 0) | (wantwrite ? EPOLLOUT : 0);
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161
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162 event.events |= EPOLLERR | EPOLLHUP | EPOLLRDHUP;
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163
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164 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_MOD, fd, &event);
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165
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166 if(ret == 0) {
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167 lua_pushboolean(L, 1);
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168 return 1;
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169 }
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170 else {
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171 ret = errno;
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172 luaL_pushfail(L);
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173 lua_pushstring(L, strerror(ret));
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174 lua_pushinteger(L, ret);
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175 return 3;
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176 }
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177
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178 #endif
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179 #ifdef USE_SELECT
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180
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181 if(!FD_ISSET(fd, &state->all)) {
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182 luaL_pushfail(L);
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183 lua_pushstring(L, strerror(ENOENT));
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184 lua_pushinteger(L, ENOENT);
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185 return 3;
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186 }
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187
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188 if(!lua_isnoneornil(L, 3)) {
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189 if(lua_toboolean(L, 3)) {
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190 FD_SET(fd, &state->wantread);
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191 }
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192 else {
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193 FD_CLR(fd, &state->wantread);
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194 }
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195 }
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196
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197 if(!lua_isnoneornil(L, 4)) {
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198 if(lua_toboolean(L, 4)) {
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199 FD_SET(fd, &state->wantwrite);
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200 }
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201 else {
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202 FD_CLR(fd, &state->wantwrite);
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203 }
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204 }
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205
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206 lua_pushboolean(L, 1);
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207 return 1;
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208 #endif
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209 }
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210
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211 /*
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212 * Remove FDs
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213 */
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214 static int Ldel(lua_State *L) {
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215 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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216 int fd = luaL_checkinteger(L, 2);
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217
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218 #ifdef USE_EPOLL
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219
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220 struct epoll_event event;
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221 event.data.fd = fd;
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222
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223 int ret = epoll_ctl(state->epoll_fd, EPOLL_CTL_DEL, fd, &event);
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224
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225 if(ret == 0) {
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226 lua_pushboolean(L, 1);
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227 return 1;
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228 }
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229 else {
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230 ret = errno;
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231 luaL_pushfail(L);
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232 lua_pushstring(L, strerror(ret));
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233 lua_pushinteger(L, ret);
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234 return 3;
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235 }
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236
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237 #endif
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238 #ifdef USE_SELECT
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239
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240 if(!FD_ISSET(fd, &state->all)) {
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241 luaL_pushfail(L);
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242 lua_pushstring(L, strerror(ENOENT));
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243 lua_pushinteger(L, ENOENT);
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244 return 3;
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245 }
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246
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247 FD_CLR(fd, &state->wantread);
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248 FD_CLR(fd, &state->wantwrite);
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249 FD_CLR(fd, &state->readable);
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250 FD_CLR(fd, &state->writable);
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251 FD_CLR(fd, &state->all);
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252 FD_CLR(fd, &state->err);
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253
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254 lua_pushboolean(L, 1);
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255 return 1;
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256 #endif
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257 }
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258
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259
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260 /*
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261 * Check previously manipulated event state for FDs ready for reading or writing
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262 */
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263 static int Lpushevent(lua_State *L, struct Lpoll_state *state) {
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264 #ifdef USE_EPOLL
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265
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266 if(state->processed > 0) {
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267 state->processed--;
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268 struct epoll_event event = state->events[state->processed];
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269 lua_pushinteger(L, event.data.fd);
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270 lua_pushboolean(L, event.events & (EPOLLIN | EPOLLHUP | EPOLLRDHUP | EPOLLERR));
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271 lua_pushboolean(L, event.events & EPOLLOUT);
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272 return 3;
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273 }
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274
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275 #endif
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276 #ifdef USE_SELECT
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277
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278 for(int fd = state->processed + 1; fd < FD_SETSIZE; fd++) {
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279 if(FD_ISSET(fd, &state->readable) || FD_ISSET(fd, &state->writable) || FD_ISSET(fd, &state->err)) {
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280 lua_pushinteger(L, fd);
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281 lua_pushboolean(L, FD_ISSET(fd, &state->readable) | FD_ISSET(fd, &state->err));
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282 lua_pushboolean(L, FD_ISSET(fd, &state->writable));
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283 FD_CLR(fd, &state->readable);
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diff changeset
284 FD_CLR(fd, &state->writable);
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diff changeset
285 FD_CLR(fd, &state->err);
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diff changeset
286 state->processed = fd;
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287 return 3;
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288 }
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289 }
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290
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291 #endif
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292 return 0;
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293 }
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294
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295 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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296 * Wait for event
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297 */
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298 static int Lwait(lua_State *L) {
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299 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
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300
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diff changeset
301 int ret = Lpushevent(L, state);
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302
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diff changeset
303 if(ret != 0) {
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diff changeset
304 return ret;
b95ef295c66d util.poll: Import poll library with epoll and select support
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305 }
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306
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diff changeset
307 lua_Number timeout = luaL_checknumber(L, 2);
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308 luaL_argcheck(L, timeout >= 0, 1, "positive number expected");
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309
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diff changeset
310 #ifdef USE_EPOLL
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311 ret = epoll_wait(state->epoll_fd, state->events, MAX_EVENTS, timeout * 1000);
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312 #endif
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313 #ifdef USE_SELECT
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314 /*
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315 * 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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316 * have to recreate it manually every time a copy is made.
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317 */
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318 memcpy(&state->readable, &state->wantread, sizeof(fd_set));
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319 memcpy(&state->writable, &state->wantwrite, sizeof(fd_set));
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320 memcpy(&state->err, &state->all, sizeof(fd_set));
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321
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
322 struct timeval tv;
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323 tv.tv_sec = (time_t)timeout;
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324 tv.tv_usec = ((suseconds_t)(timeout * 1000000)) % 1000000;
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325
9437
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diff changeset
326 ret = select(FD_SETSIZE, &state->readable, &state->writable, &state->err, &tv);
9313
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327 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
328
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diff changeset
329 if(ret == 0) {
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330 /* Is this an error? */
9313
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331 lua_pushnil(L);
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332 lua_pushstring(L, "timeout");
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333 return 2;
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diff changeset
334 }
9508
2055b497b515 net.server_epoll: Special handling of signal interrupts
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335 else if(ret < 0 && errno == EINTR) {
10921
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336 /* Is this an error? */
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diff changeset
337 lua_pushnil(L);
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diff changeset
338 lua_pushstring(L, "signal");
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diff changeset
339 return 2;
2055b497b515 net.server_epoll: Special handling of signal interrupts
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diff changeset
340 }
9313
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diff changeset
341 else if(ret < 0) {
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diff changeset
342 ret = errno;
10921
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diff changeset
343 luaL_pushfail(L);
9313
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diff changeset
344 lua_pushstring(L, strerror(ret));
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diff changeset
345 lua_pushinteger(L, ret);
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diff changeset
346 return 3;
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
347 }
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
348
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
349 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
350 * 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
351 */
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Kim Alvefur <zash@zash.se>
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diff changeset
352 #ifdef USE_EPOLL
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Kim Alvefur <zash@zash.se>
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diff changeset
353 state->processed = ret;
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diff changeset
354 #endif
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diff changeset
355 #ifdef USE_SELECT
9313
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diff changeset
356 state->processed = -1;
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diff changeset
357 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
358 return Lpushevent(L, state);
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
359 }
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
360
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
361 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
362 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
363 * 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
364 */
9954
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diff changeset
365 static int Lgetfd(lua_State *L) {
9313
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diff changeset
366 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>
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diff changeset
367 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
368 return 1;
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 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
372 * Close epoll FD
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
373 */
9954
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diff changeset
374 static int Lgc(lua_State *L) {
9313
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diff changeset
375 struct Lpoll_state *state = luaL_checkudata(L, 1, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
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diff changeset
376
9478
bd178ed0459b util.poll: Fix inverted logic
Kim Alvefur <zash@zash.se>
parents: 9476
diff changeset
377 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>
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diff changeset
378 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
379 }
9b26a50cdfe3 util.poll: Early return from __gc in case of no valid epoll FD
Kim Alvefur <zash@zash.se>
parents: 9450
diff changeset
380
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
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parents:
diff changeset
381 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
382 state->epoll_fd = -1;
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 else {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
385 lua_pushstring(L, strerror(errno));
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
386 lua_error(L);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
387 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
388
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
389 return 0;
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 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
392
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
393 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
394 * String representation
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
395 */
9954
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parents: 9508
diff changeset
396 static int Ltos(lua_State *L) {
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
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diff changeset
397 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
398 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
399 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
400 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
401
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
402 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
403 * Create a new context
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
404 */
9954
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parents: 9508
diff changeset
405 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
406 /* Allocate state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
407 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
408 luaL_setmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
409
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
410 /* Initialize state */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
411 #ifdef USE_EPOLL
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
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diff changeset
412 state->epoll_fd = -1;
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
413 state->processed = 0;
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
414
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
415 int epoll_fd = epoll_create1(EPOLL_CLOEXEC);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
416
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
417 if(epoll_fd <= 0) {
10921
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Kim Alvefur <zash@zash.se>
parents: 10096
diff changeset
418 luaL_pushfail(L);
9476
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
419 lua_pushstring(L, strerror(errno));
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
420 lua_pushinteger(L, errno);
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
421 return 3;
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
422 }
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
423
f3935aa4cc7e util.poll: Handle failed epoll FD creation
Kim Alvefur <zash@zash.se>
parents: 9475
diff changeset
424 state->epoll_fd = epoll_fd;
12314
898554323338 util.poll: Restructure to make adding additional system APIs easier
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diff changeset
425 #endif
898554323338 util.poll: Restructure to make adding additional system APIs easier
Kim Alvefur <zash@zash.se>
parents: 10921
diff changeset
426 #ifdef USE_SELECT
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
427 FD_ZERO(&state->wantread);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
428 FD_ZERO(&state->wantwrite);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
429 FD_ZERO(&state->readable);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
430 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
431 FD_ZERO(&state->all);
352e8b75c1ae util.poll: Zero FD sets watched for errors on creation
Kim Alvefur <zash@zash.se>
parents: 9447
diff changeset
432 FD_ZERO(&state->err);
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
433 state->processed = FD_SETSIZE;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
434 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
435
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
436 return 1;
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
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
439 /*
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
440 * Open library
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
441 */
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
442 int luaopen_util_poll(lua_State *L) {
9318
3429006518bf util.poll: Lua 5.1 compat
Kim Alvefur <zash@zash.se>
parents: 9317
diff changeset
443 #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
444 luaL_checkversion(L);
9318
3429006518bf util.poll: Lua 5.1 compat
Kim Alvefur <zash@zash.se>
parents: 9317
diff changeset
445 #endif
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
446
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
447 luaL_newmetatable(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
448 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
449
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
450 lua_pushliteral(L, STATE_MT);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
451 lua_setfield(L, -2, "__name");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
452
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
453 lua_pushcfunction(L, Ltos);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
454 lua_setfield(L, -2, "__tostring");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
455
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
456 lua_createtable(L, 0, 2);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
457 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
458 lua_pushcfunction(L, Ladd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
459 lua_setfield(L, -2, "add");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
460 lua_pushcfunction(L, Lset);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
461 lua_setfield(L, -2, "set");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
462 lua_pushcfunction(L, Ldel);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
463 lua_setfield(L, -2, "del");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
464 lua_pushcfunction(L, Lwait);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
465 lua_setfield(L, -2, "wait");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
466 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
467 lua_pushcfunction(L, Lgetfd);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
468 lua_setfield(L, -2, "getfd");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
469 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
470 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
471 lua_setfield(L, -2, "__index");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
472
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
473 #ifdef USE_EPOLL
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
474 lua_pushcfunction(L, Lgc);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
475 lua_setfield(L, -2, "__gc");
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
476 #endif
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
477 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
478
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
479 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
480 {
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
481 lua_pushcfunction(L, Lnew);
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
482 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
483
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
484 #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
485 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
486
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
487 push_errno(EEXIST);
9507
33d21f020b66 net.server_epoll: Ignore ENOENT when deregitering socket
Kim Alvefur <zash@zash.se>
parents: 9506
diff changeset
488 push_errno(ENOENT);
9506
ae6636052be9 net.server_epoll: Graceful handling of registering already added socket
Kim Alvefur <zash@zash.se>
parents: 9478
diff changeset
489
9313
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
490 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
491 return 1;
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
492 }
b95ef295c66d util.poll: Import poll library with epoll and select support
Kim Alvefur <zash@zash.se>
parents:
diff changeset
493