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Diffstat (limited to 'c/src/lib/libbsp/i960/cvme961/shmsupp/lock.c')
-rw-r--r--c/src/lib/libbsp/i960/cvme961/shmsupp/lock.c74
1 files changed, 0 insertions, 74 deletions
diff --git a/c/src/lib/libbsp/i960/cvme961/shmsupp/lock.c b/c/src/lib/libbsp/i960/cvme961/shmsupp/lock.c
deleted file mode 100644
index dfddd58fcf..0000000000
--- a/c/src/lib/libbsp/i960/cvme961/shmsupp/lock.c
+++ /dev/null
@@ -1,74 +0,0 @@
-/* Shared Memory Lock Routines
- *
- * This shared memory locked queue support routine need to be
- * able to lock the specified locked queue. Interrupts are
- * disabled while the queue is locked to prevent preemption
- * and deadlock when two tasks poll for the same lock.
- * previous level.
- *
- * 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.
- *
- * $Id$
- */
-
-#include <rtems.h>
-#include <bsp.h>
-#include <shm_driver.h>
-
-/*
- * Shm_Initialize_lock
- *
- * Initialize the lock for the specified locked queue.
- */
-
-void Shm_Initialize_lock(
- Shm_Locked_queue_Control *lq_cb
-)
-{
- lq_cb->lock = LQ_UNLOCKED;
-}
-
-/* void _Shm_Lock( &lq_cb )
- *
- * This shared memory locked queue support routine locks the
- * specified locked queue. It disables interrupts to prevent
- * a deadlock condition.
- */
-
-void Shm_Lock(
- Shm_Locked_queue_Control *lq_cb
-)
-{
- uint32_t isr_level, oldlock;
-
- rtems_interrupt_disable( isr_level );
- Shm_isrstat = isr_level;
- while ( 1 ) {
- atomic_modify( SHM_LOCK_VALUE, &lq_cb->lock, oldlock );
- if ( !(oldlock & SHM_LOCK_VALUE) )
- return;
- rtems_bsp_delay( 28 ); /* delay 28 microseconds */
- }
-}
-
-/*
- * Shm_Unlock
- *
- * Unlock the lock for the specified locked queue.
- */
-
-void Shm_Unlock(
- Shm_Locked_queue_Control *lq_cb
-)
-{
- uint32_t isr_level;
-
- lq_cb->lock = SHM_UNLOCK_VALUE;
- isr_level = Shm_isrstat;
- rtems_interrupt_enable( isr_level );
-}