1 files changed, 94 insertions, 0 deletions
diff --git a/cpukit/score/src/coremutex.c b/cpukit/score/src/coremutex.c
new file mode 100644
index 0000000000..dcd2e778fe
--- /dev/null
+++ b/cpukit/score/src/coremutex.c
@@ -0,0 +1,94 @@
+/*
+ *  Mutex Handler
+ *
+ *  DESCRIPTION:
+ *
+ *  This package is the implementation of the Mutex Handler.
+ *  This handler provides synchronization and mutual exclusion capabilities.
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  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 <rtems/system.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/coremutex.h>
+#include <rtems/score/states.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/threadq.h>
+
+/*PAGE
+ *
+ *  _CORE_mutex_Initialize
+ *
+ *  This routine initializes a mutex at create time and set the control
+ *  structure according to the values passed.
+ *
+ *  Input parameters:
+ *    the_mutex             - the mutex control block to initialize
+ *    the_mutex_attributes  - the mutex attributes specified at create time
+ *    initial_lock          - mutex initial lock or unlocked status
+ *
+ *  Output parameters:  NONE
+ */
+
+CORE_mutex_Status _CORE_mutex_Initialize(
+  CORE_mutex_Control           *the_mutex,
+  CORE_mutex_Attributes        *the_mutex_attributes,
+  uint32_t                      initial_lock
+)
+{
+
+/* Add this to the RTEMS environment later ?????????
+  rtems_assert( initial_lock == CORE_MUTEX_LOCKED ||
+                initial_lock == CORE_MUTEX_UNLOCKED );
+ */
+
+  the_mutex->Attributes    = *the_mutex_attributes;
+  the_mutex->lock          = initial_lock;
+  the_mutex->blocked_count = 0;
+
+  if ( initial_lock == CORE_MUTEX_LOCKED ) {
+    the_mutex->nest_count = 1;
+    the_mutex->holder     = _Thread_Executing;
+    the_mutex->holder_id  = _Thread_Executing->Object.id;
+    if ( _CORE_mutex_Is_inherit_priority( &the_mutex->Attributes ) ||
+         _CORE_mutex_Is_priority_ceiling( &the_mutex->Attributes ) ) {
+
+      if ( _Thread_Executing->current_priority <
+             the_mutex->Attributes.priority_ceiling )
+       return CORE_MUTEX_STATUS_CEILING_VIOLATED;
+#ifdef __RTEMS_STRICT_ORDER_MUTEX__
+       _Chain_Prepend_unprotected( &_Thread_Executing->lock_mutex,
+                                   &the_mutex->queue.lock_queue );
+       the_mutex->queue.priority_before = _Thread_Executing->current_priority;
+#endif
+
+      _Thread_Executing->resource_count++;
+    }
+  } else {
+    the_mutex->nest_count = 0;
+    the_mutex->holder     = NULL;
+    the_mutex->holder_id  = 0;
+  }
+
+  _Thread_queue_Initialize(
+    &the_mutex->Wait_queue,
+    _CORE_mutex_Is_fifo( the_mutex_attributes ) ?
+      THREAD_QUEUE_DISCIPLINE_FIFO : THREAD_QUEUE_DISCIPLINE_PRIORITY,
+    STATES_WAITING_FOR_MUTEX,
+    CORE_MUTEX_TIMEOUT
+  );
+
+  return CORE_MUTEX_STATUS_SUCCESSFUL;
+}