Sat Sep 10 12:56:13 1999 Ross Johnson <rpj@swan.canberra.edu.au>

        The following code for POSIX read/write locks was contributed
        by Aurelio Medina.

        * implement.h (pthread_rwlock_t_): Add.
        * pthread.h (pthread_rwlock_t): Add.
        (PTHREAD_RWLOCK_INITIALIZER): Add.
        Add rwlock function prototypes.
        * rwlock.c: New module.
        * pthread.def: Add new rwlock functions.
        * private.c (_pthread_processInitialize): initialise
        _pthread_rwlock_test_init_lock critical section.
        * global.c (_pthread_rwlock_test_init_lock): Add.

        * mutex.c (pthread_mutex_destroy): Don't free mutex memory
        if mutex is PTHREAD_MUTEX_INITIALIZER and has not been
        initialised yet.

tests/ChangeLog
Sep 15 1999  Ross Johnson  <rpj@ixobrychus.canberra.edu.au>

        * rwlock1.c: New test.
        * rwlock2.c: New test.
        * rwlock3.c: New test.
        * rwlock4.c: New test.

1 files changed, 44 insertions, 0 deletions

diff --git a/tests/rwlock4.c b/tests/rwlock4.c
new file mode 100644
index 0000000..07e4cff
--- /dev/null
+++ b/tests/rwlock4.c
@@ -0,0 +1,44 @@
+/* 
+ * rwlock3.c
+ *
+ * Declare a static rwlock object, rdlock it, trywrlock it, 
+ * and then unlock it again.
+ *
+ * Depends on API functions: 
+ *	pthread_rwlock_rdlock()
+ *	pthread_rwlock_trywrlock()
+ *	pthread_rwlock_unlock()
+ */
+
+#include "test.h"
+ 
+pthread_rwlock_t rwlock1 = PTHREAD_RWLOCK_INITIALIZER;
+
+static int washere = 0;
+
+void * func(void * arg)
+{
+  assert(pthread_rwlock_trywrlock(&rwlock1) == EBUSY);
+
+  washere = 1;
+
+  return 0; 
+}
+ 
+int
+main()
+{
+  pthread_t t;
+
+  assert(pthread_rwlock_rdlock(&rwlock1) == 0);
+
+  assert(pthread_create(&t, NULL, func, NULL) == 0);
+
+  Sleep(2000);
+
+  assert(pthread_rwlock_unlock(&rwlock1) == 0);
+
+  assert(washere == 1);
+
+  return 0;
+}