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/**
* @file
*
* @brief Examine and/or change the calling thread's signal mask
* @ingroup POSIXAPI
*/
/*
* 3.3.5 Examine and Change Blocked Signals, P1003.1b-1993, p. 73
*
* NOTE: P1003.1c/D10, p. 37 adds pthread_sigmask().
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <signal.h>
#include <errno.h>
#include <rtems/system.h>
#include <rtems/posix/pthreadimpl.h>
#include <rtems/posix/psignalimpl.h>
#include <rtems/seterr.h>
int pthread_sigmask(
int how,
const sigset_t *__restrict set,
sigset_t *__restrict oset
)
{
POSIX_API_Control *api;
if ( !set && !oset )
rtems_set_errno_and_return_minus_one( EINVAL );
api = _Thread_Get_executing()->API_Extensions[ THREAD_API_POSIX ];
if ( oset )
*oset = api->signals_blocked;
if ( !set )
return 0;
switch ( how ) {
case SIG_BLOCK:
api->signals_blocked |= *set;
break;
case SIG_UNBLOCK:
api->signals_blocked &= ~*set;
break;
case SIG_SETMASK:
api->signals_blocked = *set;
break;
default:
rtems_set_errno_and_return_minus_one( EINVAL );
}
/* XXX are there critical section problems here? */
/* XXX evaluate the new set */
if ( ~api->signals_blocked &
(api->signals_pending | _POSIX_signals_Pending) ) {
_Thread_Dispatch();
}
return 0;
}
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