diff options
Diffstat (limited to 'src/framework/common/include/generic/dmm_spinlock.h')
-rw-r--r-- | src/framework/common/include/generic/dmm_spinlock.h | 53 |
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_ */ |