From 8c8bcc5d1737002a9d153105c16b262d2e201efa Mon Sep 17 00:00:00 2001
From: rpj <rpj>
Date: Tue, 19 Oct 2004 13:24:40 +0000
Subject: Semaphore speedups - alpha, but passes testsuite

---
 sem_post_multiple.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'sem_post_multiple.c')

diff --git a/sem_post_multiple.c b/sem_post_multiple.c
index 43c71a6..e30e01a 100644
--- a/sem_post_multiple.c
+++ b/sem_post_multiple.c
@@ -76,6 +76,9 @@ sem_post_multiple (sem_t * sem, int count)
       */
 {
   int result = 0;
+#ifndef NEED_SEM
+  long waiters;
+#endif
 
   if (sem == NULL || *sem == NULL || count <= 0)
     {
@@ -88,7 +91,8 @@ sem_post_multiple (sem_t * sem, int count)
 
 #else /* NEED_SEM */
 
-  else if (!ReleaseSemaphore ((*sem)->sem, count, 0))
+    else if ((waiters = -InterlockedExchangeAdd((LPLONG) &(*sem)->value, (LONG) count)) > 0
+	     && !ReleaseSemaphore((*sem)->sem,  (waiters<=count)?waiters:count, 0))
 
 #endif /* NEED_SEM */
 
-- 
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