author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 02:56:42 +0300 | |
changeset 68 | ff3fc7722556 |
parent 18 | 47c74d1534e1 |
permissions | -rw-r--r-- |
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/* GLIB - Library of useful routines for C programming |
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
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* Portions copyright (c) 2009 Nokia Corporation. All rights reserved. |
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* gpoll.c: poll(2) abstraction |
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* Copyright 1998 Owen Taylor |
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* Copyright 2008 Red Hat, Inc. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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|
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/* |
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS |
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* file for a list of people on the GLib Team. See the ChangeLog |
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* files for a list of changes. These files are distributed with |
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* GLib at ftp://ftp.gtk.org/pub/gtk/. |
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*/ |
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/* |
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* MT safe |
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*/ |
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#include "config.h" |
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/* Uncomment the next line (and the corresponding line in gmain.c) to |
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* enable debugging printouts if the environment variable |
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* G_MAIN_POLL_DEBUG is set to some value. |
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*/ |
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/* #define G_MAIN_POLL_DEBUG */ |
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#ifdef _WIN32 |
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/* Always enable debugging printout on Windows, as it is more often |
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* needed there... |
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*/ |
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#define G_MAIN_POLL_DEBUG |
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#endif |
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#include "glib.h" |
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#include <sys/types.h> |
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#include <time.h> |
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#include <stdlib.h> |
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#ifdef HAVE_SYS_TIME_H |
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#include <sys/time.h> |
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#endif /* HAVE_SYS_TIME_H */ |
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#ifdef GLIB_HAVE_SYS_POLL_H |
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# include <sys/poll.h> |
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# undef events /* AIX 4.1.5 & 4.3.2 define this for SVR3,4 compatibility */ |
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# undef revents /* AIX 4.1.5 & 4.3.2 define this for SVR3,4 compatibility */ |
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/* The poll() emulation on OS/X doesn't handle fds=NULL, nfds=0, |
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* so we prefer our own poll emulation. |
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*/ |
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#if defined(_POLL_EMUL_H_) || defined(BROKEN_POLL) |
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#undef HAVE_POLL |
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#endif |
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#endif /* GLIB_HAVE_SYS_POLL_H */ |
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif /* HAVE_UNISTD_H */ |
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#include <errno.h> |
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#ifdef G_OS_WIN32 |
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#define STRICT |
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#include <windows.h> |
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#endif /* G_OS_WIN32 */ |
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#include "galias.h" |
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#ifdef G_MAIN_POLL_DEBUG |
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extern gboolean _g_main_poll_debug; |
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#endif |
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#ifdef HAVE_POLL |
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/* SunOS has poll, but doesn't provide a prototype. */ |
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# if defined (sun) && !defined (__SVR4) |
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extern gint poll (struct pollfd *fds, guint nfsd, gint timeout); |
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# endif /* !sun */ |
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/** |
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* g_poll: |
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* @fds: file descriptors to poll |
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* @nfds: the number of file descriptors in @fds |
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* @timeout: amount of time to wait, in milliseconds, or -1 to wait forever |
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* |
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* Polls @fds, as with the poll() system call, but portably. (On |
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* systems that don't have poll(), it is emulated using select().) |
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* This is used internally by #GMainContext, but it can be called |
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* directly if you need to block until a file descriptor is ready, but |
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102 |
* don't want to run the full main loop. |
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103 |
* |
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104 |
* Each element of @fds is a #GPollFD describing a single file |
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105 |
* descriptor to poll. The %fd field indicates the file descriptor, |
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106 |
* and the %events field indicates the events to poll for. On return, |
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107 |
* the %revents fields will be filled with the events that actually |
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108 |
* occurred. |
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109 |
* |
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110 |
* On POSIX systems, the file descriptors in @fds can be any sort of |
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111 |
* file descriptor, but the situation is much more complicated on |
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112 |
* Windows. If you need to use g_poll() in code that has to run on |
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113 |
* Windows, the easiest solution is to construct all of your |
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114 |
* #GPollFD<!-- -->s with g_io_channel_win32_make_pollfd(). |
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115 |
* |
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116 |
* Return value: the number of entries in @fds whose %revents fields |
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117 |
* were filled in, or 0 if the operation timed out, or -1 on error or |
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118 |
* if the call was interrupted. |
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119 |
* |
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120 |
* Since: 2.20 |
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121 |
**/ |
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122 |
gint |
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123 |
g_poll (GPollFD *fds, |
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124 |
guint nfds, |
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125 |
gint timeout) |
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126 |
{ |
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127 |
return poll ((struct pollfd *)fds, nfds, timeout); |
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128 |
} |
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129 |
|
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130 |
#else /* !HAVE_POLL */ |
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131 |
|
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132 |
#ifdef G_OS_WIN32 |
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133 |
|
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134 |
static int |
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135 |
poll_rest (gboolean poll_msgs, |
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136 |
HANDLE *handles, |
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137 |
gint nhandles, |
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138 |
GPollFD *fds, |
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139 |
guint nfds, |
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140 |
gint timeout) |
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141 |
{ |
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142 |
DWORD ready; |
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143 |
GPollFD *f; |
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144 |
int recursed_result; |
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145 |
|
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146 |
if (poll_msgs) |
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147 |
{ |
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148 |
/* Wait for either messages or handles |
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149 |
* -> Use MsgWaitForMultipleObjectsEx |
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150 |
*/ |
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151 |
if (_g_main_poll_debug) |
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152 |
g_print (" MsgWaitForMultipleObjectsEx(%d, %d)\n", nhandles, timeout); |
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153 |
|
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154 |
ready = MsgWaitForMultipleObjectsEx (nhandles, handles, timeout, |
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155 |
QS_ALLINPUT, MWMO_ALERTABLE); |
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156 |
|
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157 |
if (ready == WAIT_FAILED) |
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158 |
{ |
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159 |
gchar *emsg = g_win32_error_message (GetLastError ()); |
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160 |
g_warning ("MsgWaitForMultipleObjectsEx failed: %s", emsg); |
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161 |
g_free (emsg); |
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162 |
} |
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163 |
} |
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164 |
else if (nhandles == 0) |
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165 |
{ |
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166 |
/* No handles to wait for, just the timeout */ |
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167 |
if (timeout == INFINITE) |
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168 |
ready = WAIT_FAILED; |
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169 |
else |
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170 |
{ |
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171 |
SleepEx (timeout, TRUE); |
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172 |
ready = WAIT_TIMEOUT; |
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173 |
} |
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174 |
} |
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175 |
else |
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176 |
{ |
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177 |
/* Wait for just handles |
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178 |
* -> Use WaitForMultipleObjectsEx |
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179 |
*/ |
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180 |
if (_g_main_poll_debug) |
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181 |
g_print (" WaitForMultipleObjectsEx(%d, %d)\n", nhandles, timeout); |
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182 |
|
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183 |
ready = WaitForMultipleObjectsEx (nhandles, handles, FALSE, timeout, TRUE); |
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184 |
if (ready == WAIT_FAILED) |
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185 |
{ |
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186 |
gchar *emsg = g_win32_error_message (GetLastError ()); |
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187 |
g_warning ("WaitForMultipleObjectsEx failed: %s", emsg); |
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188 |
g_free (emsg); |
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189 |
} |
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190 |
} |
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191 |
|
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192 |
if (_g_main_poll_debug) |
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193 |
g_print (" wait returns %ld%s\n", |
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194 |
ready, |
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195 |
(ready == WAIT_FAILED ? " (WAIT_FAILED)" : |
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196 |
(ready == WAIT_TIMEOUT ? " (WAIT_TIMEOUT)" : |
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197 |
(poll_msgs && ready == WAIT_OBJECT_0 + nhandles ? " (msg)" : "")))); |
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198 |
|
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199 |
if (ready == WAIT_FAILED) |
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200 |
return -1; |
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201 |
else if (ready == WAIT_TIMEOUT || |
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202 |
ready == WAIT_IO_COMPLETION) |
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203 |
return 0; |
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204 |
else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles) |
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|
205 |
{ |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
206 |
for (f = fds; f < &fds[nfds]; ++f) |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
207 |
if (f->fd == G_WIN32_MSG_HANDLE && f->events & G_IO_IN) |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
208 |
f->revents |= G_IO_IN; |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
209 |
|
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
210 |
/* If we have a timeout, or no handles to poll, be satisfied |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
211 |
* with just noticing we have messages waiting. |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
212 |
*/ |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
213 |
if (timeout != 0 || nhandles == 0) |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
214 |
return 1; |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
215 |
|
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
216 |
/* If no timeout and handles to poll, recurse to poll them, |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
217 |
* too. |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
218 |
*/ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
219 |
recursed_result = poll_rest (FALSE, handles, nhandles, fds, nfds, 0); |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
220 |
return (recursed_result == -1) ? -1 : 1 + recursed_result; |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
221 |
} |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
222 |
else if (ready >= WAIT_OBJECT_0 && ready < WAIT_OBJECT_0 + nhandles) |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
223 |
{ |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
224 |
for (f = fds; f < &fds[nfds]; ++f) |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
225 |
{ |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
226 |
if ((HANDLE) f->fd == handles[ready - WAIT_OBJECT_0]) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
227 |
{ |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
228 |
f->revents = f->events; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
229 |
if (_g_main_poll_debug) |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
230 |
g_print (" got event %p\n", (HANDLE) f->fd); |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
231 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
232 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
233 |
|
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
234 |
/* If no timeout and polling several handles, recurse to poll |
47c74d1534e1
Revision: 201011
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parents:
diff
changeset
|
235 |
* the rest of them. |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
236 |
*/ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
237 |
if (timeout == 0 && nhandles > 1) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
238 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
239 |
/* Remove the handle that fired */ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
240 |
int i; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
241 |
if (ready < nhandles - 1) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
242 |
for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
243 |
handles[i-1] = handles[i]; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
244 |
nhandles--; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
245 |
recursed_result = poll_rest (FALSE, handles, nhandles, fds, nfds, 0); |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
246 |
return (recursed_result == -1) ? -1 : 1 + recursed_result; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
247 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
248 |
return 1; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
249 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
250 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
251 |
return 0; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
252 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
253 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
254 |
gint |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
255 |
g_poll (GPollFD *fds, |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
256 |
guint nfds, |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
257 |
gint timeout) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
258 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
259 |
HANDLE handles[MAXIMUM_WAIT_OBJECTS]; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
260 |
gboolean poll_msgs = FALSE; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
261 |
GPollFD *f; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
262 |
gint nhandles = 0; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
263 |
int retval; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
264 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
265 |
if (_g_main_poll_debug) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
266 |
g_print ("g_poll: waiting for"); |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
267 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
268 |
for (f = fds; f < &fds[nfds]; ++f) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
269 |
if (f->fd == G_WIN32_MSG_HANDLE && (f->events & G_IO_IN)) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
270 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
271 |
if (_g_main_poll_debug && !poll_msgs) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
272 |
g_print (" MSG"); |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
273 |
poll_msgs = TRUE; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
274 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
275 |
else if (f->fd > 0) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
276 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
277 |
/* Don't add the same handle several times into the array, as |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
278 |
* docs say that is not allowed, even if it actually does seem |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
279 |
* to work. |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
280 |
*/ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
281 |
gint i; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
282 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
283 |
for (i = 0; i < nhandles; i++) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
284 |
if (handles[i] == (HANDLE) f->fd) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
285 |
break; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
286 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
287 |
if (i == nhandles) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
288 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
289 |
if (nhandles == MAXIMUM_WAIT_OBJECTS) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
290 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
291 |
g_warning ("Too many handles to wait for!\n"); |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
292 |
break; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
293 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
294 |
else |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
295 |
{ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
296 |
if (_g_main_poll_debug) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
297 |
g_print (" %p", (HANDLE) f->fd); |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
298 |
handles[nhandles++] = (HANDLE) f->fd; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
299 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
300 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
301 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
302 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
303 |
if (_g_main_poll_debug) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
304 |
g_print ("\n"); |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
305 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
306 |
for (f = fds; f < &fds[nfds]; ++f) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
307 |
f->revents = 0; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
308 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
309 |
if (timeout == -1) |
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timeout = INFINITE; |
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311 |
|
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312 |
/* Polling for several things? */ |
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if (nhandles > 1 || (nhandles > 0 && poll_msgs)) |
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314 |
{ |
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315 |
/* First check if one or several of them are immediately |
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* available |
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317 |
*/ |
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retval = poll_rest (poll_msgs, handles, nhandles, fds, nfds, 0); |
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319 |
|
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320 |
/* If not, and we have a significant timeout, poll again with |
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321 |
* timeout then. Note that this will return indication for only |
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* one event, or only for messages. We ignore timeouts less than |
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323 |
* ten milliseconds as they are mostly pointless on Windows, the |
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* MsgWaitForMultipleObjectsEx() call will timeout right away |
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325 |
* anyway. |
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326 |
*/ |
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if (retval == 0 && (timeout == INFINITE || timeout >= 10)) |
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retval = poll_rest (poll_msgs, handles, nhandles, fds, nfds, timeout); |
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329 |
} |
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330 |
else |
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331 |
{ |
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332 |
/* Just polling for one thing, so no need to check first if |
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333 |
* available immediately |
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334 |
*/ |
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335 |
retval = poll_rest (poll_msgs, handles, nhandles, fds, nfds, timeout); |
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336 |
} |
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337 |
|
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338 |
if (retval == -1) |
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for (f = fds; f < &fds[nfds]; ++f) |
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340 |
f->revents = 0; |
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|
341 |
|
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342 |
return retval; |
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343 |
} |
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|
344 |
|
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345 |
#else /* !G_OS_WIN32 */ |
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346 |
|
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347 |
/* The following implementation of poll() comes from the GNU C Library. |
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348 |
* Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc. |
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349 |
*/ |
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350 |
|
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|
351 |
#include <string.h> /* for bzero on BSD systems */ |
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|
352 |
|
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|
353 |
#ifdef HAVE_SYS_SELECT_H |
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354 |
#include <sys/select.h> |
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355 |
#endif /* HAVE_SYS_SELECT_H */ |
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|
356 |
|
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357 |
#ifdef G_OS_BEOS |
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358 |
#undef NO_FD_SET |
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359 |
#endif /* G_OS_BEOS */ |
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|
360 |
|
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|
361 |
#ifndef NO_FD_SET |
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362 |
# define SELECT_MASK fd_set |
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363 |
#else /* !NO_FD_SET */ |
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364 |
# ifndef _AIX |
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365 |
typedef long fd_mask; |
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366 |
# endif /* _AIX */ |
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|
367 |
# ifdef _IBMR2 |
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368 |
# define SELECT_MASK void |
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369 |
# else /* !_IBMR2 */ |
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370 |
# define SELECT_MASK int |
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371 |
# endif /* !_IBMR2 */ |
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372 |
#endif /* !NO_FD_SET */ |
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|
373 |
|
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|
374 |
EXPORT_C gint |
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|
375 |
g_poll (GPollFD *fds, |
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376 |
guint nfds, |
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377 |
gint timeout) |
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|
378 |
{ |
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|
379 |
struct timeval tv; |
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380 |
SELECT_MASK rset, wset, xset; |
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381 |
GPollFD *f; |
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382 |
int ready; |
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383 |
int maxfd = 0; |
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|
384 |
|
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|
385 |
FD_ZERO (&rset); |
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|
386 |
FD_ZERO (&wset); |
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387 |
FD_ZERO (&xset); |
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|
388 |
|
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|
389 |
for (f = fds; f < &fds[nfds]; ++f) |
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|
390 |
if (f->fd >= 0) |
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|
391 |
{ |
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|
392 |
if (f->events & G_IO_IN) |
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|
393 |
FD_SET (f->fd, &rset); |
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|
394 |
if (f->events & G_IO_OUT) |
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|
395 |
FD_SET (f->fd, &wset); |
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|
396 |
if (f->events & G_IO_PRI) |
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|
397 |
FD_SET (f->fd, &xset); |
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|
398 |
if (f->fd > maxfd && (f->events & (G_IO_IN|G_IO_OUT|G_IO_PRI))) |
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|
399 |
maxfd = f->fd; |
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|
400 |
} |
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|
401 |
|
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|
402 |
tv.tv_sec = timeout / 1000; |
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|
403 |
tv.tv_usec = (timeout % 1000) * 1000; |
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|
404 |
|
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|
405 |
ready = select (maxfd + 1, &rset, &wset, &xset, |
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|
406 |
timeout == -1 ? NULL : &tv); |
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|
407 |
if (ready > 0) |
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|
408 |
for (f = fds; f < &fds[nfds]; ++f) |
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|
409 |
{ |
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|
410 |
f->revents = 0; |
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|
411 |
if (f->fd >= 0) |
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|
412 |
{ |
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diff
changeset
|
413 |
if (FD_ISSET (f->fd, &rset)) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
414 |
f->revents |= G_IO_IN; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
415 |
if (FD_ISSET (f->fd, &wset)) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
416 |
f->revents |= G_IO_OUT; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
417 |
if (FD_ISSET (f->fd, &xset)) |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
418 |
f->revents |= G_IO_PRI; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
419 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
420 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
421 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
422 |
return ready; |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
423 |
} |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
424 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
425 |
#endif /* !G_OS_WIN32 */ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
426 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
427 |
#endif /* !HAVE_POLL */ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
428 |
|
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
429 |
#define __G_POLL_C__ |
47c74d1534e1
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
430 |
#include "galiasdef.c" |