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/**
* @file
*
* @ingroup POSIX_SIGNALS POSIX Signals Support
*
* @brief POSIX Signals Clear Signals
*/
/*
* COPYRIGHT (c) 1989-2007.
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <rtems/score/isr.h>
#include <rtems/score/thread.h>
#include <rtems/score/wkspace.h>
#include <rtems/seterr.h>
#include <rtems/posix/threadsup.h>
#include <rtems/posix/psignalimpl.h>
#include <rtems/posix/pthreadimpl.h>
#include <stdio.h>
/*
* _POSIX_signals_Clear_signals
*/
bool _POSIX_signals_Clear_signals(
POSIX_API_Control *api,
int signo,
siginfo_t *info,
bool is_global,
bool check_blocked,
bool do_signals_acquire_release
)
{
sigset_t mask;
sigset_t signals_unblocked;
Thread_queue_Context queue_context;
bool do_callout;
POSIX_signals_Siginfo_node *psiginfo;
mask = signo_to_mask( signo );
do_callout = false;
/* set blocked signals based on if checking for them, SIGNAL_ALL_MASK
* insures that no signals are blocked and all are checked.
*/
if ( check_blocked )
signals_unblocked = api->signals_unblocked;
else
signals_unblocked = SIGNAL_ALL_MASK;
/* XXX is this right for siginfo type signals? */
/* XXX are we sure they can be cleared the same way? */
if ( do_signals_acquire_release ) {
_Thread_queue_Context_initialize( &queue_context );
_POSIX_signals_Acquire( &queue_context );
}
if ( is_global ) {
if ( mask & (_POSIX_signals_Pending & signals_unblocked) ) {
if ( _POSIX_signals_Vectors[ signo ].sa_flags == SA_SIGINFO ) {
psiginfo = (POSIX_signals_Siginfo_node *)
_Chain_Get_unprotected( &_POSIX_signals_Siginfo[ signo ] );
_POSIX_signals_Clear_process_signals( signo );
/*
* It may be impossible to get here with an empty chain
* BUT until that is proven we need to be defensive and
* protect against it.
*/
if ( psiginfo ) {
*info = psiginfo->Info;
_Chain_Append_unprotected(
&_POSIX_signals_Inactive_siginfo,
&psiginfo->Node
);
} else
do_callout = false;
}
_POSIX_signals_Clear_process_signals( signo );
do_callout = true;
}
} else {
if ( mask & (api->signals_pending & signals_unblocked) ) {
api->signals_pending &= ~mask;
do_callout = true;
}
}
if ( do_signals_acquire_release ) {
_POSIX_signals_Release( &queue_context );
}
return do_callout;
}
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