forked from Imagelibrary/rtems
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/*
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* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#include <pthread.h>
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#include <signal.h>
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#include <errno.h>
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#include <rtems/system.h>
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#include <rtems/posix/pthread.h>
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#include <rtems/posix/psignal.h>
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#include <rtems/posix/seterr.h>
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#include <rtems/posix/time.h>
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int _POSIX_signals_Get_highest(
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sigset_t set
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)
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{
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int signo;
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for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
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if ( set & signo_to_mask( signo ) )
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return signo;
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}
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/* XXX - add __SIGFIRSTNOTRT or something like that to newlib siginfo.h */
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for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
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if ( set & signo_to_mask( signo ) )
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return signo;
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}
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return 0;
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}
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int sigtimedwait(
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const sigset_t *set,
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siginfo_t *info,
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const struct timespec *timeout
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)
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{
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Thread_Control *the_thread;
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POSIX_API_Control *api;
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Watchdog_Interval interval;
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siginfo_t signal_information;
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siginfo_t *the_info;
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int signo;
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the_info = ( info ) ? info : &signal_information;
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the_thread = _Thread_Executing;
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api = the_thread->API_Extensions[ THREAD_API_POSIX ];
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/*
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* What if they are already pending?
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*/
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/* API signals pending? */
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if ( *set & api->signals_pending ) {
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/* XXX real info later */
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the_info->si_signo = _POSIX_signals_Get_highest( api->signals_pending );
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_POSIX_signals_Clear_signals( api, the_info->si_signo, the_info,
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FALSE, FALSE );
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the_info->si_code = SI_USER;
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the_info->si_value.sival_int = 0;
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return the_info->si_signo;
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}
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/* Process pending signals? */
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if ( *set & _POSIX_signals_Pending ) {
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signo = _POSIX_signals_Get_highest( _POSIX_signals_Pending );
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_POSIX_signals_Clear_signals( api, signo, the_info, TRUE, FALSE );
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the_info->si_signo = signo;
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the_info->si_code = SI_USER;
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the_info->si_value.sival_int = 0;
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return signo;
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}
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interval = 0;
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if ( timeout ) {
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if (timeout->tv_nsec < 0 || timeout->tv_nsec >= TOD_NANOSECONDS_PER_SECOND)
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set_errno_and_return_minus_one( EINVAL );
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interval = _POSIX_Timespec_to_interval( timeout );
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}
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the_info->si_signo = -1;
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_Thread_Disable_dispatch();
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the_thread->Wait.queue = &_POSIX_signals_Wait_queue;
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the_thread->Wait.return_code = EINTR;
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the_thread->Wait.option = *set;
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the_thread->Wait.return_argument = (void *) the_info;
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_Thread_queue_Enter_critical_section( &_POSIX_signals_Wait_queue );
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_Thread_queue_Enqueue( &_POSIX_signals_Wait_queue, interval );
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_Thread_Enable_dispatch();
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/*
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* When the thread is set free by a signal, it is need to eliminate
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* the signal.
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*/
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_POSIX_signals_Clear_signals( api, the_info->si_signo, the_info,
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FALSE, FALSE );
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errno = _Thread_Executing->Wait.return_code;
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return the_info->si_signo;
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}
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