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/* intr.h

 *

 *  XXX: It is unclear if the type "intr_t" should be defined when

 *       _POSIX_INTERRUPT_CONTROL is not.

 *

 *  $Id: intr.h,v 1.2 2001-09-27 11:59:13 chris Exp $

 */

#ifndef __POSIX_INTERRUPTS_h

#define __POSIX_INTERRUPTS_h

#ifdef __cplusplus

extern "C" {

#endif

#include <sys/features.h>

#include <sys/types.h>

#include <sys/time.h>

#if defined(_POSIX_INTERRUPT_CONTROL)

/*

 *  22.2 Concepts, P1003.4b/D8, p. 73

 */

typedef int intr_t;

/*

 *  22.3.1 Associate a User-Written ISR with an Interrupt, P1003.4b/D8, p. 74

 */

/*

 *  Return codes from an interrupt handler

 */

#define INTR_HANDLED_NOTIFY         0 /* ISR handled this interrupt, notify */

                                      /*   the thread that registered the */

                                      /*   ISR that the interrupt occurred. */

#define INTR_HANDLED_DO_NOT_NOTIFY  1 /* ISR handled this interrupt, but */

                                      /*   do NOT perform notification. */

#define INTR_NOT_HANDLED            2 /* ISR did not handle this interrupt, */

                                      /*   let the next handler try. */

int intr_capture(

  intr_t          intr,

  int           (*intr_handler)( void *area ),

  volatile void   *area,

  size_t           areasize

);

int intr_release(

  intr_t    intr,

  int     (*intr_handler)( void *area )

);

int intr_lock(

  intr_t  intr

);

int intr_unlock(

  intr_t  intr

);

/*

 *  22.3.2 Await Interrupt Notification, P1003.4b/D8, p. 76

 */

int intr_timed_wait(

  int                     flags,

  const struct timespec  *timeout

);

#endif

#ifdef __cplusplus

}

#endif

#endif

/* end of include file */