1 files changed, 116 insertions, 0 deletions
diff --git a/cpukit/posix/src/pbarrierinit.c b/cpukit/posix/src/pbarrierinit.c
new file mode 100644
index 0000000000..a2a77f83a5
--- /dev/null
+++ b/cpukit/posix/src/pbarrierinit.c
@@ -0,0 +1,116 @@
+/*
+ *  POSIX Barrier Manager -- Initialize a Barrier 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/barrier.h>
+
+/*
+ *  pthread_barrier_init
+ *
+ *  This directive creates a barrier.  A barrier id is returned.
+ *
+ *  Input parameters:
+ *    barrier          - pointer to barrier id
+ *    attr             - barrier attributes
+ *    count            - number of threads before automatic release
+ *
+ *  Output parameters:
+ *    barrier     - barrier id
+ *    0           - if successful
+ *    error code  - if unsuccessful
+ */
+
+int pthread_barrier_init(
+  pthread_barrier_t           *barrier,
+  const pthread_barrierattr_t *attr,
+  unsigned int                 count
+)
+{
+  POSIX_Barrier_Control         *the_barrier;
+  CORE_barrier_Attributes        the_attributes;
+  pthread_barrierattr_t          my_attr;
+  const pthread_barrierattr_t   *the_attr;
+
+  /*
+   *  Error check parameters
+   */
+  if ( !barrier )
+    return EINVAL;
+
+  if ( count == 0 )
+    return EINVAL;
+
+  /*
+   * If the user passed in NULL, use the default attributes
+   */
+  if ( attr ) {
+    the_attr = attr;
+  } else {
+    (void) pthread_barrierattr_init( &my_attr );
+    the_attr = &my_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 Barrier attributes
+   */
+  the_attributes.discipline    = CORE_BARRIER_AUTOMATIC_RELEASE;
+  the_attributes.maximum_count = count;
+
+  /*
+   * Enter dispatching critical section to allocate and initialize barrier
+   */
+  _Thread_Disable_dispatch();             /* prevents deletion */
+
+  the_barrier = _POSIX_Barrier_Allocate();
+
+  if ( !the_barrier ) {
+    _Thread_Enable_dispatch();
+    return EAGAIN;
+  }
+
+  _CORE_barrier_Initialize( &the_barrier->Barrier, &the_attributes );
+
+  _Objects_Open_u32(
+    &_POSIX_Barrier_Information,
+    &the_barrier->Object,
+    0
+  );
+
+  /*
+   * Exit the critical section and return the user an operational barrier
+   */
+  *barrier = the_barrier->Object.id;
+  _Thread_Enable_dispatch();
+  return 0;
+}