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, 34 insertions, 0 deletions

diff --git a/pthread.h b/pthread.h
index af982b3..ebf9854 100644
--- a/pthread.h
+++ b/pthread.h
@@ -122,6 +122,17 @@
  *      ---------------------------
  *      pthread_sigmask
  *
+ *      ---------------------------
+ *      Read/Write Locks:
+ *      ---------------------------
+ *      pthread_rwlock_init
+ *      pthread_rwlock_destroy
+ *      pthread_rwlock_tryrdlock
+ *      pthread_rwlock_trywrlock
+ *      pthread_rwlock_rdlock
+ *      pthread_rwlock_rwlock
+ *      pthread_rwlock_unlock
+ *
  * Limitations
  * ===========
  *      The following functions are not implemented:
@@ -418,6 +429,8 @@ typedef struct pthread_mutex_t_ *pthread_mutex_t;
 typedef struct pthread_mutexattr_t_ *pthread_mutexattr_t;
 typedef struct pthread_cond_t_ *pthread_cond_t;
 typedef struct pthread_condattr_t_ *pthread_condattr_t;
+typedef struct pthread_rwlock_t_ *pthread_rwlock_t;
+typedef struct pthread_rwlockattr_t_ *pthread_rwlockattr_t;
 
 
 /*
@@ -496,6 +509,8 @@ struct pthread_once_t_
 
 #define PTHREAD_COND_INITIALIZER ((pthread_cond_t) -1)
 
+#define PTHREAD_RWLOCK_INITIALIZER ((pthread_rwlock_t) -1)
+
 
 /*
  * ====================
@@ -846,6 +861,25 @@ int pthread_attr_setschedparam (pthread_attr_t *attr,
 				const struct sched_param *param);
 
 /*
+ * Read-Write Lock Functions
+ */
+
+int pthread_rwlock_init(pthread_rwlock_t *lock,
+                               const pthread_rwlockattr_t *attr);
+
+int pthread_rwlock_destroy(pthread_rwlock_t *lock);
+
+int pthread_rwlock_tryrdlock(pthread_rwlock_t *);
+
+int pthread_rwlock_trywrlock(pthread_rwlock_t *);
+
+int pthread_rwlock_rdlock(pthread_rwlock_t *lock);
+
+int pthread_rwlock_wrlock(pthread_rwlock_t *lock);
+
+int pthread_rwlock_unlock(pthread_rwlock_t *lock);
+
+/*
  * Protected Methods
  *
  * This function blocks until the given WIN32 handle