From 99d5954a88f95e093df6337d675b56e9da2d4f96 Mon Sep 17 00:00:00 2001
From: rswindell <>
Date: Thu, 8 May 2003 20:46:31 +0000
Subject: [PATCH] Create sem_reset() macro (NOT POSIX).
---
src/xpdev/semwrap.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/xpdev/semwrap.h b/src/xpdev/semwrap.h
index a88f47a87a..3e506c5727 100644
--- a/src/xpdev/semwrap.h
+++ b/src/xpdev/semwrap.h
@@ -61,6 +61,7 @@ extern "C" {
#include <semaphore.h> /* POSIX semaphores */
#endif
+ /* NOT POSIX */
int sem_trywait_block(sem_t *sem, unsigned long timeout);
#elif defined(_WIN32)
@@ -78,6 +79,7 @@ extern "C" {
#define sem_destroy(psem) CloseHandle(*(psem))
/* No Win32 implementation for sem_getvalue() */
+ /* NOT POSIX */
#define sem_trywait_block(psem,t) (WaitForSingleObject(*(psem),t)==WAIT_OBJECT_0?0:(errno=EAGAIN,-1))
#elif defined(__OS2__) /* These have *not* been tested! */
@@ -95,6 +97,9 @@ extern "C" {
#endif
+/* Change semaphore to "unsignaled" (NOT POSIX) */
+#define sem_reset(psem) while(sem_trywait(psem)==0)
+
#if defined(__cplusplus)
}
#endif
--
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