Sat Feb 13 03:03:30 1999 Ross Johnson <rpj@ixobrychus.canberra.edu.au>

        * pthread.h (struct pthread_once_t_): Replaced.
        * misc.c (pthread_once): Replace with John Bossom's version;
        has lighter weight serialisation; fixes problem of not holding
        competing threads until after the init_routine completes.

1 files changed, 7 insertions, 1 deletions

diff --git a/pthread.h b/pthread.h
index 415602c..d08eac3 100644
--- a/pthread.h
+++ b/pthread.h
@@ -491,8 +491,14 @@ extern "C"
  * ====================
  * ====================
  */
-#define PTHREAD_ONCE_INIT	 { 0, PTHREAD_MUTEX_INITIALIZER }
+#define PTHREAD_ONCE_INIT       { FALSE, -1 }
 
+struct pthread_once_t_
+{
+  int done;                 /* indicates if user function executed  */
+  long started;             /* First thread to increment this value */
+                            /* to zero executes the user function   */
+};
 
 /*
  * ====================