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#ifndef SYNC
#define SYNC
#include <stdint.h>
/**
* Mutex object type
*/
struct _futex_imp_t
{
uint64_t iv_val;
};
typedef _futex_imp_t mutex_t;
/**
* Barrier object type
*/
struct _barrier_imp_t
{
mutex_t iv_mutex;
uint64_t iv_event;
uint64_t iv_missing;
uint64_t iv_count;
};
typedef _barrier_imp_t barrier_t;
#define MUTEX_INITIALIZER {0}
/**
* Initialize a barrier object
* @param[out] o_barrier The barrier
* @param[in] i_count The number of threads to wait on
* @pre an unitiailized barrier object
* @post a valid barrier object
*/
void barrier_init (barrier_t * o_barrier, uint64_t i_count);
/**
* Destroy a barrier
* @param[in] i_barrier The barrier
*/
void barrier_destroy (barrier_t * i_barrier);
/**
* Wait on a barrier
* @param[in] i_barrier The barrier
* @post this thread will be blocked until the barrier count is reached.
*/
void barrier_wait (barrier_t * i_barrier);
/**
* Create a mutex and initialize a mutex
* @returns a pointer to the mutex
*/
mutex_t * mutex_create();
/**
* Initialize a mutex object
* @param[out] o_mutex the mutex
* @pre an uninitialized mutex object
* @post a valid mutex object
*/
void mutex_init(mutex_t * o_mutex);
/**
* Destroy a mutex
* @param[in/out] i_mutex The mutex
* @pre mutex must have been created with mutex_create()
*/
void mutex_destroy(mutex_t *& io_mutex);
/**
* Obtain a lock on a mutex
* @param[in] i_mutex The mutex
* @post returns when this thread has the lock
*/
void mutex_lock(mutex_t * i_mutex);
/**
* Release a lock on a mutex
* @param[in] i_mutex the mutex
* @returns non zero on error
* @post mutex lock release
*/
void mutex_unlock(mutex_t * i_mutex);
#endif
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