Imported from /home/lorry/working-area/delta_php2/php-5.4.13.tar.bz2.HEADphp-5.4.13master

1 files changed, 176 insertions, 0 deletions

diff --git a/win32/select.c b/win32/select.c
new file mode 100644
index 0000000..d77ef3d
--- /dev/null
+++ b/win32/select.c
@@ -0,0 +1,176 @@
+/*
+  +----------------------------------------------------------------------+
+  | PHP Version 5                                                        |
+  +----------------------------------------------------------------------+
+  | Copyright (c) 1997-2013 The PHP Group                                |
+  +----------------------------------------------------------------------+
+  | This source file is subject to version 3.01 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_01.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"
+
+#ifdef PHP_WIN32
+
+/* $Id$ */
+
+/* Win32 select() will only work with sockets, so we roll our own implementation here.
+ * - If you supply only sockets, this simply passes through to winsock select().
+ * - If you supply file handles, there is no way to distinguish between
+ *   ready for read/write or OOB, so any set in which the handle is found will
+ *   be marked as ready.
+ * - If you supply a mixture of handles and sockets, the system will interleave
+ *   calls between select() and WaitForMultipleObjects(). The time slicing may
+ *   cause this function call to take up to 100 ms longer than you specified.
+ * - Calling this with NULL sets as a portable way to sleep with sub-second
+ *   accuracy is not supported.
+ * */
+PHPAPI int php_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
+{
+	DWORD ms_total, limit;
+	HANDLE handles[MAXIMUM_WAIT_OBJECTS];
+	int handle_slot_to_fd[MAXIMUM_WAIT_OBJECTS];
+	int n_handles = 0, i;
+	fd_set sock_read, sock_write, sock_except;
+	fd_set aread, awrite, aexcept;
+	int sock_max_fd = -1;
+	struct timeval tvslice;
+	int retcode;
+
+#define SAFE_FD_ISSET(fd, set)	(set != NULL && FD_ISSET(fd, set))
+	
+	/* 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;
+	}
+
+	FD_ZERO(&sock_read);
+	FD_ZERO(&sock_write);
+	FD_ZERO(&sock_except);
+	
+	/* build an array of handles for non-sockets */
+	for (i = 0; i < max_fd; i++) {
+		if (SAFE_FD_ISSET(i, rfds) || SAFE_FD_ISSET(i, wfds) || SAFE_FD_ISSET(i, efds)) {
+			handles[n_handles] = (HANDLE)(zend_uintptr_t)_get_osfhandle(i);
+			if (handles[n_handles] == INVALID_HANDLE_VALUE) {
+				/* socket */
+				if (SAFE_FD_ISSET(i, rfds)) {
+					FD_SET((uint)i, &sock_read);
+				}
+				if (SAFE_FD_ISSET(i, wfds)) {
+					FD_SET((uint)i, &sock_write);
+				}
+				if (SAFE_FD_ISSET(i, efds)) {
+					FD_SET((uint)i, &sock_except);
+				}
+				if (i > sock_max_fd) {
+					sock_max_fd = i;
+				}
+			} else {
+				handle_slot_to_fd[n_handles] = i;
+				n_handles++;
+			}
+		}
+	}
+
+	if (n_handles == 0) {
+		/* plain sockets only - let winsock handle the whole thing */
+		return select(max_fd, rfds, wfds, efds, tv);
+	}
+	
+	/* mixture of handles and sockets; lets multiplex between
+	 * winsock and waiting on the handles */
+
+	FD_ZERO(&aread);
+	FD_ZERO(&awrite);
+	FD_ZERO(&aexcept);
+	
+	limit = GetTickCount() + ms_total;
+	do {
+		retcode = 0;
+	
+		if (sock_max_fd >= 0) {
+			/* overwrite the zero'd sets here; the select call
+			 * will clear those that are not active */
+			aread = sock_read;
+			awrite = sock_write;
+			aexcept = sock_except;
+
+			tvslice.tv_sec = 0;
+			tvslice.tv_usec = 100000;
+
+			retcode = select(sock_max_fd+1, &aread, &awrite, &aexcept, &tvslice);
+		}
+		if (n_handles > 0) {
+			/* check handles */
+			DWORD wret;
+
+			wret = MsgWaitForMultipleObjects(n_handles, handles, FALSE, retcode > 0 ? 0 : 100, QS_ALLEVENTS);
+
+			if (wret == WAIT_TIMEOUT) {
+				/* set retcode to 0; this is the default.
+				 * select() may have set it to something else,
+				 * in which case we leave it alone, so this branch
+				 * does nothing */
+				;
+			} else if (wret == WAIT_FAILED) {
+				if (retcode == 0) {
+					retcode = -1;
+				}
+			} else {
+				if (retcode < 0) {
+					retcode = 0;
+				}
+				for (i = 0; i < n_handles; i++) {
+					if (WAIT_OBJECT_0 == WaitForSingleObject(handles[i], 0)) {
+						if (SAFE_FD_ISSET(handle_slot_to_fd[i], rfds)) {
+							FD_SET((uint)handle_slot_to_fd[i], &aread);
+						}
+						if (SAFE_FD_ISSET(handle_slot_to_fd[i], wfds)) {
+							FD_SET((uint)handle_slot_to_fd[i], &awrite);
+						}
+						if (SAFE_FD_ISSET(handle_slot_to_fd[i], efds)) {
+							FD_SET((uint)handle_slot_to_fd[i], &aexcept);
+						}
+						retcode++;
+					}
+				}
+			}
+		}
+	} while (retcode == 0 && (ms_total == INFINITE || GetTickCount() < limit));
+
+	if (rfds) {
+		*rfds = aread;
+	}
+	if (wfds) {
+		*wfds = awrite;
+	}
+	if (efds) {
+		*efds = aexcept;
+	}	
+	
+	return retcode;
+}
+
+#endif
+
+/*
+ * 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
+ */