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/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef __NVGPU_POSIX_LOCK_H__
#define __NVGPU_POSIX_LOCK_H__
#include <stdlib.h>
#include <pthread.h>
/*
* All locks for posix nvgpu are just pthread locks. There's not a lot of reason
* to have real spinlocks in userspace since we aren't using real HW or running
* perf critical code where a sleep could be devestating.
*
* This could be revisited later, though.
*/
struct __nvgpu_posix_lock {
pthread_mutex_t mutex;
};
static inline void __nvgpu_posix_lock_acquire(struct __nvgpu_posix_lock *lock)
{
pthread_mutex_lock(&lock->mutex);
}
static inline int __nvgpu_posix_lock_try_acquire(
struct __nvgpu_posix_lock *lock)
{
return pthread_mutex_trylock(&lock->mutex);
}
static inline void __nvgpu_posix_lock_release(struct __nvgpu_posix_lock *lock)
{
pthread_mutex_unlock(&lock->mutex);
}
struct nvgpu_mutex {
struct __nvgpu_posix_lock lock;
};
struct nvgpu_spinlock {
struct __nvgpu_posix_lock lock;
};
struct nvgpu_raw_spinlock {
struct __nvgpu_posix_lock lock;
};
#endif /* NVGPU_LOCK_LINUX_H */
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