[RFC/PATCH] MSVC: Windows-native implementation of pthread_cond_broadcast

["Zoltán Füzesi" <zfuzesi@eaglet.hu>]

Threaded grep feature relies on this function, but its implementation was
missing from the Win32 Pthreads API.

Signed-off-by: Zoltán Füzesi <zfuzesi@eaglet.hu>
---
Johannes, how about this? I haven't tested it.

 compat/win32/pthread.c |   12 ++++++++++++
 compat/win32/pthread.h |    2 ++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/compat/win32/pthread.c b/compat/win32/pthread.c
index 631c0a4..498b552 100644
--- a/compat/win32/pthread.c
+++ b/compat/win32/pthread.c
@@ -108,3 +108,15 @@ int pthread_cond_signal(pthread_cond_t *cond)
 	else
 		return 0;
 }
+
+int pthread_cond_broadcast(pthread_cond_t *cond)
+{
+	LONG prev_count;
+	while (cond->waiters) {
+		if (!ReleaseSemaphore(cond->sema, 1, &prev_count))
+			return err_win_to_posix(GetLastError());
+		if (prev_count == LONG_MAX - 1)
+			break;
+	}
+	return 0;
+}
diff --git a/compat/win32/pthread.h b/compat/win32/pthread.h
index b8e1bcb..11426f5 100644
--- a/compat/win32/pthread.h
+++ b/compat/win32/pthread.h
@@ -44,6 +44,8 @@ extern int pthread_cond_wait(pthread_cond_t *cond, CRITICAL_SECTION *mutex);
 
 extern int pthread_cond_signal(pthread_cond_t *cond);
 
+extern int pthread_cond_broadcast(pthread_cond_t *cond);
+
 /*
  * Simple thread creation implementation using pthread API
  */
-- 
1.7.0.rc0.48.gdace5.dirty