2002-01-27 Ross Johnson <rpj@special.ise.canberra.edu.au>

        * mutex.c (pthread_mutex_timedlock): New function suggested by
        Alexander Terekhov. The logic required to implement this
        properly came from Alexander, with some collaboration
        with Thomas Pfaff.
        (pthread_mutex_unlock): Wrap the waiters check and sema
        post in a critical section to prevent a race with
        pthread_mutex_timedlock.
        (ptw32_timed_semwait): New function;
        returns a special result if the absolute timeout parameter
        represents a time already passed when called; used by
        pthread_mutex_timedwait(). Have deliberately not reused
        the name "ptw32_sem_timedwait" because they are not the same
        routine.
        * condvar.c (ptw32_cond_timedwait): Use the new sem_timedwait()
        instead of ptw32_sem_timedwait(), which now has a different
        function. See previous.
        * implement.h: Remove prototype for ptw32_sem_timedwait.
        See next.
        (pthread_mutex_t_): Add critical section element for access
        to lock_idx during mutex post-timeout processing.
        * semaphore.h (sem_timedwait): See next.
        * semaphore.c (sem_timedwait): See next.
        * private.c (ptw32_sem_timedwait): Move to semaphore.c
        and rename as sem_timedwait().

2002-01-18  Ross Johnson  <rpj@special.ise.canberra.edu.au>

        * sync.c (pthread_join): Was getting the exit code from the
        calling thread rather than the joined thread if
        defined(__MINGW32__) && !defined(__MSVCRT__).

2002-01-15  Ross Johnson  <rpj@special.ise.canberra.edu.au>

        * pthread.h: Unless the build explicitly defines __CLEANUP_SEH,
        __CLEANUP_CXX, or __CLEANUP_C, then the build defaults to
        __CLEANUP_C style cleanup. This style uses setjmp/longjmp
        in the cancelation and thread exit implementations and therefore
        won't do stack unwinding if linked to applications that have it
        (e.g. C++ apps). This is currently consistent with most/all
        commercial Unix POSIX threads implementations.

        * spin.c (pthread_spin_init): Edit renamed function call.
        * nonportable.c (pthread_num_processors_np): New.
        (pthread_getprocessors_np): Renamed to ptw32_getprocessors
        and moved to private.c.
        * private.c (pthread_getprocessors): Moved here from
        nonportable.c.
        * pthread.def (pthread_getprocessors_np): Removed
        from export list.

        * rwlock.c (pthread_rwlockattr_init): New.
        (pthread_rwlockattr_destroy): New.
        (pthread_rwlockattr_getpshared): New.
        (pthread_rwlockattr_setpshared): New.

1 files changed, 231 insertions, 0 deletions

diff --git a/rwlock.c b/rwlock.c
index 506803b..5a89833 100644
--- a/rwlock.c
+++ b/rwlock.c
@@ -254,6 +254,237 @@ pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
     return ((result != 0) ? result : ((result1 != 0) ? result1 : result2));
 }
 
+
+int
+pthread_rwlockattr_init (pthread_rwlockattr_t * attr)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      Initializes a rwlock attributes object with default
+      *      attributes.
+      *
+      * PARAMETERS
+      *      attr
+      *              pointer to an instance of pthread_rwlockattr_t
+      *
+      *
+      * DESCRIPTION
+      *      Initializes a rwlock attributes object with default
+      *      attributes.
+      *
+      * RESULTS
+      *              0               successfully initialized attr,
+      *              ENOMEM          insufficient memory for attr.
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result = 0;
+  pthread_rwlockattr_t rwa;
+
+  rwa = (pthread_rwlockattr_t) calloc (1, sizeof (*rwa));
+
+  if (rwa == NULL)
+    {
+      result = ENOMEM;
+    }
+  else
+    {
+      rwa->pshared = PTHREAD_PROCESS_PRIVATE;
+    }
+
+  *attr = rwa;
+
+  return(result);
+}                               /* pthread_rwlockattr_init */
+
+
+int
+pthread_rwlockattr_destroy (pthread_rwlockattr_t * attr)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      Destroys a rwlock attributes object. The object can
+      *      no longer be used.
+      *
+      * PARAMETERS
+      *      attr
+      *              pointer to an instance of pthread_rwlockattr_t
+      *
+      *
+      * DESCRIPTION
+      *      Destroys a rwlock attributes object. The object can
+      *      no longer be used.
+      *
+      *      NOTES:
+      *              1)      Does not affect rwlockss created using 'attr'
+      *
+      * RESULTS
+      *              0               successfully released attr,
+      *              EINVAL          'attr' is invalid.
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result = 0;
+
+  if (attr == NULL || *attr == NULL)
+    {
+      result = EINVAL;
+    }
+  else
+    {
+      pthread_rwlockattr_t rwa = *attr;
+
+      *attr = NULL;
+      free (rwa);
+    }
+
+  return(result);
+}                               /* pthread_rwlockattr_destroy */
+
+
+int
+pthread_rwlockattr_getpshared (const pthread_rwlockattr_t * attr,
+                               int *pshared)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      Determine whether rwlocks created with 'attr' can be
+      *      shared between processes.
+      *
+      * PARAMETERS
+      *      attr
+      *              pointer to an instance of pthread_rwlockattr_t
+      *
+      *      pshared
+      *              will be set to one of:
+      *
+      *                      PTHREAD_PROCESS_SHARED
+      *                              May be shared if in shared memory
+      *
+      *                      PTHREAD_PROCESS_PRIVATE
+      *                              Cannot be shared.
+      *
+      *
+      * DESCRIPTION
+      *      Rwlocks creatd with 'attr' can be shared between
+      *      processes if pthread_rwlock_t variable is allocated
+      *      in memory shared by these processes.
+      *      NOTES:
+      *              1)      pshared rwlocks MUST be allocated in shared
+      *                      memory.
+      *              2)      The following macro is defined if shared rwlocks
+      *                      are supported:
+      *                              _POSIX_THREAD_PROCESS_SHARED
+      *
+      * RESULTS
+      *              0               successfully retrieved attribute,
+      *              EINVAL          'attr' is invalid,
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result;
+
+  if ((attr != NULL && *attr != NULL) &&
+      (pshared != NULL))
+    {
+      *pshared = (*attr)->pshared;
+      result = 0;
+    }
+  else
+    {
+      result = EINVAL;
+    }
+
+  return (result);
+
+}                               /* pthread_rwlockattr_getpshared */
+
+
+int
+pthread_rwlockattr_setpshared (pthread_rwlockattr_t * attr,
+			      int pshared)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      Rwlocks created with 'attr' can be shared between
+      *      processes if pthread_rwlock_t variable is allocated
+      *      in memory shared by these processes.
+      *
+      * PARAMETERS
+      *      attr
+      *              pointer to an instance of pthread_rwlockattr_t
+      *
+      *      pshared
+      *              must be one of:
+      *
+      *                      PTHREAD_PROCESS_SHARED
+      *                              May be shared if in shared memory
+      *
+      *                      PTHREAD_PROCESS_PRIVATE
+      *                              Cannot be shared.
+      *
+      * DESCRIPTION
+      *      Rwlocks creatd with 'attr' can be shared between
+      *      processes if pthread_rwlock_t variable is allocated
+      *      in memory shared by these processes.
+      *
+      *      NOTES:
+      *              1)      pshared rwlocks MUST be allocated in shared
+      *                      memory.
+      *
+      *              2)      The following macro is defined if shared rwlocks
+      *                      are supported:
+      *                              _POSIX_THREAD_PROCESS_SHARED
+      *
+      * RESULTS
+      *              0               successfully set attribute,
+      *              EINVAL          'attr' or pshared is invalid,
+      *              ENOSYS          PTHREAD_PROCESS_SHARED not supported,
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result;
+
+  if ((attr != NULL && *attr != NULL) &&
+      ((pshared == PTHREAD_PROCESS_SHARED) ||
+       (pshared == PTHREAD_PROCESS_PRIVATE)))
+    {
+      if (pshared == PTHREAD_PROCESS_SHARED)
+        {
+
+#if !defined( _POSIX_THREAD_PROCESS_SHARED )
+
+          result = ENOSYS;
+          pshared = PTHREAD_PROCESS_PRIVATE;
+
+#else
+
+          result = 0;
+
+#endif /* _POSIX_THREAD_PROCESS_SHARED */
+
+        }
+      else
+        {
+          result = 0;
+        }
+
+      (*attr)->pshared = pshared;
+    }
+  else
+    {
+      result = EINVAL;
+    }
+
+  return (result);
+
+}                               /* pthread_rwlockattr_setpshared */
+
+
 int
 pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 {