1 files changed, 53 insertions, 0 deletions
diff --git a/src/framework/common/include/generic/dmm_spinlock.h b/src/framework/common/include/generic/dmm_spinlock.h
new file mode 100644
index 0000000..be183a6
--- /dev/null
+++ b/src/framework/common/include/generic/dmm_spinlock.h
@@ -0,0 +1,53 @@
+/*
+*
+* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at:
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+#ifndef _DMM_SPINLOCK_H_
+#define _DMM_SPINLOCK_H_
+
+#include "dmm_pause.h"
+
+typedef struct
+{
+  volatile int lock;
+} dmm_spinlock_t;
+
+inline static void
+dmm_spin_init (dmm_spinlock_t * spinlock)
+{
+  spinlock->lock = 0;
+}
+
+inline static void
+dmm_spin_lock (dmm_spinlock_t * spinlock)
+{
+  while (0 != __sync_lock_test_and_set (&spinlock->lock, 1))
+    {
+      DMM_PAUSE_WHILE (spinlock->lock);
+    }
+}
+
+inline static int
+dmm_spin_trylock (dmm_spinlock_t * spinlock)
+{
+  return 0 == __sync_lock_test_and_set (&spinlock->lock, 1);
+}
+
+inline static void
+dmm_spin_unlock (dmm_spinlock_t * spinlock)
+{
+  spinlock->lock = 0;
+}
+
+#endif /* #ifndef _DMM_SPINLOCK_H_ */