1998-10-05 Ben Elliston <bje@cygnus.com>

	* global.c (PTHREAD_MUTEX_INITIALIZER): Move to pthread.h.
	* pthread.h (PTHREAD_MUTEX_INITIALIZER): Define.
	(pthread_mutex_t): Reimplement as a struct containing a valid
	flag. If the flag is ever down upon entry to a mutex operation,
	we call pthread_mutex_create() to initialise the object. This
	fixes the problem of how to handle statically initialised objects
	that can't call InitializeCriticalSection() due to their context.
	* mutex.c (pthread_mutex_init): Set valid flag.
	(pthread_mutex_destroy): Clear valid flag.
	(pthread_mutex_lock): Check and handle the valid flag.
	(pthread_mutex_unlock): Likewise.
	(pthread_mutex_trylock): Likewise.
	* tests/mutex3.c: New file; test for the static initialisation
	macro. Passes.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/mutex3.c b/tests/mutex3.c
new file mode 100644
index 0000000..2bb6106
--- /dev/null
+++ b/tests/mutex3.c
@@ -0,0 +1,12 @@
+#include <pthread.h>
+
+pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+int
+main()
+{
+  pthread_mutex_lock(&mutex);
+  /* do stuff */
+  pthread_mutex_unlock(&mutex);
+  return 0;
+}