Mercurial > luasocket

annotate src/select.c @ 4:f0a27ccb1193 tip

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Added ignore file
author Eric Wing <ewing . public |-at-| gmail . com>
date Sat, 30 Aug 2008 08:46:39 -0700
parents 4b915342e2a8
children
rev   line source
0
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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1 /*=========================================================================*\
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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2 * Select implementation
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3 * LuaSocket toolkit
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4 *
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5 * RCS ID: $Id: select.c,v 1.22 2005/11/20 07:20:23 diego Exp $
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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6 \*=========================================================================*/
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7 #include <string.h>
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8
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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9 #include "lua.h"
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10 #include "lauxlib.h"
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11
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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12 #include "socket.h"
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13 #include "timeout.h"
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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14 #include "select.h"
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15
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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16 /*=========================================================================*\
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17 * Internal function prototypes.
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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18 \*=========================================================================*/
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19 static t_socket getfd(lua_State *L);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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20 static int dirty(lua_State *L);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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21 static t_socket collect_fd(lua_State *L, int tab, t_socket max_fd,
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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22 int itab, fd_set *set);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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23 static int check_dirty(lua_State *L, int tab, int dtab, fd_set *set);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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24 static void return_fd(lua_State *L, fd_set *set, t_socket max_fd,
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25 int itab, int tab, int start);
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26 static void make_assoc(lua_State *L, int tab);
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27 static int global_select(lua_State *L);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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28
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29 /* functions in library namespace */
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30 static luaL_reg func[] = {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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31 {"select", global_select},
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32 {NULL, NULL}
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33 };
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34
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35 /*=========================================================================*\
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36 * Exported functions
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37 \*=========================================================================*/
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38 /*-------------------------------------------------------------------------*\
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39 * Initializes module
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40 \*-------------------------------------------------------------------------*/
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41 int select_open(lua_State *L) {
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42 luaL_openlib(L, NULL, func, 0);
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43 return 0;
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44 }
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45
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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46 /*=========================================================================*\
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47 * Global Lua functions
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48 \*=========================================================================*/
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49 /*-------------------------------------------------------------------------*\
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50 * Waits for a set of sockets until a condition is met or timeout.
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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51 \*-------------------------------------------------------------------------*/
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52 static int global_select(lua_State *L) {
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53 int rtab, wtab, itab, ret, ndirty;
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54 t_socket max_fd;
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55 fd_set rset, wset;
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56 t_timeout tm;
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57 double t = luaL_optnumber(L, 3, -1);
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58 FD_ZERO(&rset); FD_ZERO(&wset);
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59 lua_settop(L, 3);
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60 lua_newtable(L); itab = lua_gettop(L);
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61 lua_newtable(L); rtab = lua_gettop(L);
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62 lua_newtable(L); wtab = lua_gettop(L);
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63 max_fd = collect_fd(L, 1, SOCKET_INVALID, itab, &rset);
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64 ndirty = check_dirty(L, 1, rtab, &rset);
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65 t = ndirty > 0? 0.0: t;
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66 timeout_init(&tm, t, -1);
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67 timeout_markstart(&tm);
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68 max_fd = collect_fd(L, 2, max_fd, itab, &wset);
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69 ret = socket_select(max_fd+1, &rset, &wset, NULL, &tm);
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70 if (ret > 0 || ndirty > 0) {
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71 return_fd(L, &rset, max_fd+1, itab, rtab, ndirty);
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72 return_fd(L, &wset, max_fd+1, itab, wtab, 0);
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73 make_assoc(L, rtab);
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74 make_assoc(L, wtab);
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75 return 2;
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76 } else if (ret == 0) {
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77 lua_pushstring(L, "timeout");
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78 return 3;
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79 } else {
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80 lua_pushstring(L, "error");
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81 return 3;
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82 }
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83 }
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84
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85 /*=========================================================================*\
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86 * Internal functions
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87 \*=========================================================================*/
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88 static t_socket getfd(lua_State *L) {
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89 t_socket fd = SOCKET_INVALID;
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90 lua_pushstring(L, "getfd");
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91 lua_gettable(L, -2);
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92 if (!lua_isnil(L, -1)) {
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93 lua_pushvalue(L, -2);
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94 lua_call(L, 1, 1);
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95 if (lua_isnumber(L, -1))
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96 fd = (t_socket) lua_tonumber(L, -1);
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97 }
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98 lua_pop(L, 1);
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99 return fd;
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100 }
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101
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102 static int dirty(lua_State *L) {
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103 int is = 0;
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104 lua_pushstring(L, "dirty");
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105 lua_gettable(L, -2);
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106 if (!lua_isnil(L, -1)) {
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107 lua_pushvalue(L, -2);
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108 lua_call(L, 1, 1);
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109 is = lua_toboolean(L, -1);
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110 }
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111 lua_pop(L, 1);
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112 return is;
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113 }
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114
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115 static t_socket collect_fd(lua_State *L, int tab, t_socket max_fd,
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116 int itab, fd_set *set) {
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117 int i = 1;
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118 if (lua_isnil(L, tab))
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119 return max_fd;
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120 while (1) {
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121 t_socket fd;
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122 lua_pushnumber(L, i);
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123 lua_gettable(L, tab);
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124 if (lua_isnil(L, -1)) {
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125 lua_pop(L, 1);
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126 break;
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127 }
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128 fd = getfd(L);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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129 if (fd != SOCKET_INVALID) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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130 FD_SET(fd, set);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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131 if (max_fd == SOCKET_INVALID || max_fd < fd)
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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132 max_fd = fd;
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133 lua_pushnumber(L, fd);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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134 lua_pushvalue(L, -2);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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135 lua_settable(L, itab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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136 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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137 lua_pop(L, 1);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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138 i = i + 1;
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139 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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140 return max_fd;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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141 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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142
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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143 static int check_dirty(lua_State *L, int tab, int dtab, fd_set *set) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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144 int ndirty = 0, i = 1;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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145 if (lua_isnil(L, tab))
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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146 return 0;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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147 while (1) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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148 t_socket fd;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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149 lua_pushnumber(L, i);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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150 lua_gettable(L, tab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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151 if (lua_isnil(L, -1)) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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152 lua_pop(L, 1);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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153 break;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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154 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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155 fd = getfd(L);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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156 if (fd != SOCKET_INVALID && dirty(L)) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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157 lua_pushnumber(L, ++ndirty);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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158 lua_pushvalue(L, -2);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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159 lua_settable(L, dtab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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160 FD_CLR(fd, set);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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161 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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162 lua_pop(L, 1);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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163 i = i + 1;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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164 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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165 return ndirty;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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166 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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167
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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168 static void return_fd(lua_State *L, fd_set *set, t_socket max_fd,
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
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169 int itab, int tab, int start) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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170 t_socket fd;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
171 for (fd = 0; fd < max_fd; fd++) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
172 if (FD_ISSET(fd, set)) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
173 lua_pushnumber(L, ++start);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
174 lua_pushnumber(L, fd);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
175 lua_gettable(L, itab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
176 lua_settable(L, tab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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177 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
178 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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179 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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180
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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181 static void make_assoc(lua_State *L, int tab) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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182 int i = 1, atab;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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183 lua_newtable(L); atab = lua_gettop(L);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
184 while (1) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
185 lua_pushnumber(L, i);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
186 lua_gettable(L, tab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
187 if (!lua_isnil(L, -1)) {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
188 lua_pushnumber(L, i);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
189 lua_pushvalue(L, -2);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
190 lua_settable(L, atab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
191 lua_pushnumber(L, i);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
192 lua_settable(L, atab);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
193 } else {
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
194 lua_pop(L, 1);
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
195 break;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
196 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
197 i = i+1;
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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198 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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199 }
4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
200