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/* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef ODP_API_RWLOCK_H_
#define ODP_API_RWLOCK_H_
/**
* @file
*
* ODP RW Locks
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup odp_locks ODP LOCKS
* @details
* <b> Reader / writer lock (odp_rwlock_t) </b>
*
* A reader/writer lock allows multiple simultaneous readers but only one
* writer at a time. A thread that wants write access will have to wait until
* there are no threads that want read access. This casues a risk for
* starvation.
* @{
*/
/**
* @typedef odp_rwlock_t
* ODP reader/writer lock
*/
/**
* Initialize a reader/writer lock.
*
* @param rwlock Pointer to a reader/writer lock
*/
void odp_rwlock_init(odp_rwlock_t *rwlock);
/**
* Acquire read permission on a reader/writer lock.
*
* @param rwlock Pointer to a reader/writer lock
*/
void odp_rwlock_read_lock(odp_rwlock_t *rwlock);
/**
* Release read permission on a reader/writer lock.
*
* @param rwlock Pointer to a reader/writer lock
*/
void odp_rwlock_read_unlock(odp_rwlock_t *rwlock);
/**
* Acquire write permission on a reader/writer lock.
*
* @param rwlock Pointer to a reader/writer lock
*/
void odp_rwlock_write_lock(odp_rwlock_t *rwlock);
/**
* Release write permission on a reader/writer lock.
*
* @param rwlock Pointer to a reader/writer lock
*/
void odp_rwlock_write_unlock(odp_rwlock_t *rwlock);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* ODP_RWLOCK_H_ */
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