1 files changed, 110 insertions, 0 deletions
diff --git a/cpukit/posix/src/prwlockinit.c b/cpukit/posix/src/prwlockinit.c
new file mode 100644
index 0000000000..c79b260b50
--- /dev/null
+++ b/cpukit/posix/src/prwlockinit.c
@@ -0,0 +1,110 @@
+/*
+ *  POSIX RWLock Manager -- Destroy a RWLock Instance
+ *
+ *  COPYRIGHT (c) 1989-2006.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <pthread.h>
+#include <errno.h>
+
+#include <rtems/system.h>
+#include <rtems/posix/rwlock.h>
+
+/*
+ *  pthread_rwlock_init
+ *
+ *  This directive creates a rwlock.  A rwlock id is returned.
+ *
+ *  Input parameters:
+ *    rwlock          - pointer to rwlock id
+ *    attr            - rwlock attributes
+ *
+ *  Output parameters:
+ *    rwlock     - rwlock id
+ *    0          - if successful
+ *    error code - if unsuccessful
+ */
+
+int pthread_rwlock_init(
+  pthread_rwlock_t           *rwlock,
+  const pthread_rwlockattr_t *attr
+)
+{
+  POSIX_RWLock_Control        *the_rwlock;
+  CORE_RWLock_Attributes       the_attributes;
+  pthread_rwlockattr_t         default_attr;
+  const pthread_rwlockattr_t  *the_attr;
+
+  /*
+   *  Error check parameters
+   */
+  if ( !rwlock )
+    return EINVAL;
+
+  /*
+   * If the user passed in NULL, use the default attributes
+   */
+  if ( attr ) {
+    the_attr = attr;
+  } else {
+    (void) pthread_rwlockattr_init( &default_attr );
+    the_attr = &default_attr;
+  }
+
+  /*
+   * Now start error checking the attributes that we are going to use
+   */
+  if ( !the_attr->is_initialized )
+    return EINVAL;
+
+  switch ( the_attr->process_shared ) {
+    case PTHREAD_PROCESS_PRIVATE:    /* only supported values */
+      break;
+    case PTHREAD_PROCESS_SHARED:
+    default:
+      return EINVAL;
+  }
+
+  /*
+   * Convert from POSIX attributes to Core RWLock attributes
+   * 
+   * NOTE: Currently there are no core rwlock attributes
+   */
+  _CORE_RWLock_Initialize_attributes( &the_attributes );
+
+  /*
+   * Enter dispatching critical section to allocate and initialize RWLock
+   */
+  _Thread_Disable_dispatch();             /* prevents deletion */
+
+  the_rwlock = _POSIX_RWLock_Allocate();
+
+  if ( !the_rwlock ) {
+    _Thread_Enable_dispatch();
+    return EAGAIN;
+  }
+
+  _CORE_RWLock_Initialize( &the_rwlock->RWLock, &the_attributes );
+
+  _Objects_Open_u32(
+    &_POSIX_RWLock_Information,
+    &the_rwlock->Object,
+    0
+  );
+
+  *rwlock = the_rwlock->Object.id;
+
+  _Thread_Enable_dispatch();
+  return 0;
+}