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/*

 *  condinit.c,v 1.3 2002/07/01 22:33:47 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include <pthread.h>

#include <errno.h>

#include <rtems/system.h>

#include <rtems/score/object.h>

#include <rtems/score/states.h>

#include <rtems/score/watchdog.h>

#include <rtems/posix/cond.h>

#include <rtems/posix/time.h>

#include <rtems/posix/mutex.h>

/*PAGE

 *

 *  11.4.2 Initializing and Destroying a Condition Variable,

 *         P1003.1c/Draft 10, p. 87

 */

int pthread_cond_init(

  pthread_cond_t           *cond,

  const pthread_condattr_t *attr

)

{

  POSIX_Condition_variables_Control   *the_cond;

  const pthread_condattr_t            *the_attr;

  if ( attr ) the_attr = attr;

  else        the_attr = &_POSIX_Condition_variables_Default_attributes;

  /*

   *  XXX: Be careful about attributes when global!!!

   */

  if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED )

    return POSIX_MP_NOT_IMPLEMENTED();

  if ( !the_attr->is_initialized )

    return EINVAL;

  _Thread_Disable_dispatch();

  the_cond = _POSIX_Condition_variables_Allocate();

  if ( !the_cond ) {

    _Thread_Enable_dispatch();

    return ENOMEM;

  }

#if defined(RTEMS_MULTIPROCESSING)

  if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED &&

     !( _Objects_MP_Allocate_and_open( &_POSIX_Condition_variables_Information,

                0, the_cond->Object.id, FALSE ) ) ) {

    _POSIX_Condition_variables_Free( the_cond );

    _Thread_Enable_dispatch();

    return EAGAIN;

  }

#endif

  the_cond->process_shared  = the_attr->process_shared;

  the_cond->Mutex = POSIX_CONDITION_VARIABLES_NO_MUTEX;

/* XXX some more initialization might need to go here */

  _Thread_queue_Initialize(

    &the_cond->Wait_queue,

    THREAD_QUEUE_DISCIPLINE_FIFO,

    STATES_WAITING_FOR_CONDITION_VARIABLE,

    ETIMEDOUT

  );

  _Objects_Open(

    &_POSIX_Condition_variables_Information,

    &the_cond->Object,

  );

  *cond = the_cond->Object.id;

#if defined(RTEMS_MULTIPROCESSING)

  if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED )

    _POSIX_Condition_variables_MP_Send_process_packet(

      POSIX_CONDITION_VARIABLES_MP_ANNOUNCE_CREATE,

      the_cond->Object.id,

      0,                         /* Name not used */

    );

#endif

  _Thread_Enable_dispatch();

  return 0;

}