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|
/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2003 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_0.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Wez Furlong <wez@thebrainroom.com> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "php_network.h"
/* $Id$ */
/* Win32 select() will only work with sockets, so we roll our own implementation that will
* get the OS file handle from regular fd's and sockets and then use WaitForMultipleObjects().
* This implementation is not as feature-full as posix select, but it works for our purposes
*/
PHPAPI int php_select(php_socket_t max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
{
HANDLE *handles;
DWORD waitret;
DWORD ms_total;
int f, s, fd_count = 0, sock_count = 0;
int retval;
php_socket_t i;
fd_set ard, awr, aex; /* active fd sets */
for (i = 0; i < max_fd; i++) {
if (FD_ISSET(i, rfds) || FD_ISSET(i, wfds) || FD_ISSET(i, efds)) {
if (_get_osfhandle(i) == 0xffffffff) {
/* it is a socket */
sock_count++;
} else {
fd_count++;
}
}
}
if (fd_count + sock_count == 0) {
return 0;
}
handles = (HANDLE*)safe_emalloc((fd_count + sock_count), sizeof(HANDLE), 0);
/* populate the events and handles arrays */
f = 0;
s = 0;
for (i = 0; i < max_fd; i++) {
if (FD_ISSET(i, rfds) || FD_ISSET(i, wfds) || FD_ISSET(i, efds)) {
long h = _get_osfhandle(i);
if (h == 0xFFFFFFFF) {
HANDLE evt;
long evt_flags = 0;
if (FD_ISSET(i, rfds)) {
evt_flags |= FD_READ|FD_CONNECT|FD_ACCEPT|FD_CLOSE;
}
if (FD_ISSET(i, wfds)) {
evt_flags |= FD_WRITE;
}
if (FD_ISSET(i, efds)) {
evt_flags |= FD_OOB;
}
evt = WSACreateEvent();
WSAEventSelect(i, evt, evt_flags);
handles[fd_count + s] = evt;
s++;
} else {
handles[f++] = (HANDLE)h;
}
}
}
/* calculate how long we need to wait in milliseconds */
if (tv == NULL) {
ms_total = INFINITE;
} else {
ms_total = tv->tv_sec * 1000;
ms_total += tv->tv_usec / 1000;
}
waitret = MsgWaitForMultipleObjects(fd_count + sock_count, handles, FALSE, ms_total, QS_ALLEVENTS);
if (waitret == WAIT_TIMEOUT) {
retval = 0;
} else if (waitret == 0xFFFFFFFF) {
retval = -1;
} else {
FD_ZERO(&ard);
FD_ZERO(&awr);
FD_ZERO(&aex);
f = 0;
retval = 0;
for (i = 0; i < max_fd; i++) {
if (FD_ISSET(i, rfds) || FD_ISSET(i, wfds) || FD_ISSET(i, efds)) {
if (f >= fd_count) {
/* socket event */
HANDLE evt = handles[f];
if (WAIT_OBJECT_0 == WaitForSingleObject(evt, 0)) {
/* check for various signal states */
if (FD_ISSET(i, rfds)) {
WSAEventSelect(i, evt, FD_READ|FD_CONNECT|FD_ACCEPT|FD_CLOSE);
if (WAIT_OBJECT_0 == WaitForSingleObject(evt, 0)) {
FD_SET(i, &ard);
}
}
if (FD_ISSET(i, wfds)) {
WSAEventSelect(i, evt, FD_WRITE);
if (WAIT_OBJECT_0 == WaitForSingleObject(evt, 0)) {
FD_SET(i, &awr);
}
}
if (FD_ISSET(i, efds)) {
WSAEventSelect(i, evt, FD_OOB);
if (WAIT_OBJECT_0 == WaitForSingleObject(evt, 0)) {
FD_SET(i, &aex);
}
}
retval++;
}
WSACloseEvent(evt);
} else {
if (WAIT_OBJECT_0 == WaitForSingleObject(handles[f], 0)) {
if (FD_ISSET(i, rfds)) {
FD_SET(i, &ard);
}
if (FD_ISSET(i, wfds)) {
FD_SET(i, &awr);
}
if (FD_ISSET(i, efds)) {
FD_SET(i, &aex);
}
retval++;
}
}
f++;
}
}
if (rfds) {
*rfds = ard;
}
if (wfds) {
*wfds = awr;
}
if (efds) {
*efds = aex;
}
}
efree(handles);
return retval;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
|
