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/*

 *  setcancelstate.c,v 1.4 2002/07/05 18:13:18 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include <pthread.h>

#include <errno.h>

#include <rtems/system.h>

#include <rtems/score/chain.h>

#include <rtems/score/isr.h>

#include <rtems/score/thread.h>

#include <rtems/score/wkspace.h>

#include <rtems/posix/cancel.h>

#include <rtems/posix/pthread.h>

#include <rtems/posix/threadsup.h>

/*PAGE

 *

 *  18.2.2 Setting Cancelability State, P1003.1c/Draft 10, p. 183

 */

int pthread_setcancelstate(

  int  state,

  int *oldstate

)

{

  POSIX_API_Control                 *thread_support;

  /*

   *  Don't even think about deleting a resource from an ISR.

   *  Besides this request is supposed to be for _Thread_Executing

   *  and the ISR context is not a thread.

   */

  if ( _ISR_Is_in_progress() )

    return EPROTO;

  if ( !oldstate )

    return EINVAL;

  if ( state != PTHREAD_CANCEL_ENABLE && state != PTHREAD_CANCEL_DISABLE )

    return EINVAL;

  thread_support = _Thread_Executing->API_Extensions[ THREAD_API_POSIX ];

  _Thread_Disable_dispatch();

    *oldstate = thread_support->cancelability_state;

    thread_support->cancelability_state = state;

    if ( thread_support->cancelability_state == PTHREAD_CANCEL_ENABLE &&

         thread_support->cancelability_type == PTHREAD_CANCEL_ASYNCHRONOUS &&

         thread_support->cancelation_requested )

      _POSIX_Threads_cancel_run( _Thread_Executing );

  _Thread_Enable_dispatch();

  return 0;

}