/* ------------------------------
   $Id: abar.h,v 1.1 2006/01/27 08:40:46 marquet Exp $
   ------------------------------------------------------------

   Asymmetric barrier synchronization
   Philippe Marquet, Jan 2006
   
*/

#ifndef _ABAR_H_
#define _ABAR_H_

typedef struct abar_s abar_t;

/* Called by the master to allocate and initialize a barrier for use
   by n_slaves slave processes */
abar_t *abar_init(int n_slaves);

/* Called by master to indicate it is finished with the barrier. No
   slaves must be waiting in the barrier at the time of the call */
int abar_destroy(abar_t *b);

/* Called by the master to wait for all slaves to enter the
   barrier. Returns when all slaves have called barrier_slave.  */
int abar_master(abar_t *b);

/* Called by a slave to enter the barrier.  Returns after the master
   has released the barrier (barrier_release) */ 
int abar_slave(abar_t *b);

/* Called by the master to release all the slaves that have entered
   the barrier */
int abar_release(abar_t *b);

#endif