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/*___INFO__MARK_BEGIN__*/
/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the Sun Industry Standards Source License Version 1.2
*
* Sun Microsystems Inc., March, 2001
*
*
* Sun Industry Standards Source License Version 1.2
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.2 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://gridengine.sunsource.net/Gridengine_SISSL_license.html
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2003 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
************************************************************************/
/*___INFO__MARK_END__*/
#include "sge_thread_jvm.h"
#include <signal.h>
#include <pthread.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include "uti/sge_mtutil.h"
#include "uti/sge_rmon.h"
#include "uti/sge_thread_ctrl.h"
#define THREAD_CONTROL_MUTEX "thread_control_mutex"
#define THREAD_LAYER BASIS_LAYER
thread_control_t Thread_Control = {
PTHREAD_MUTEX_INITIALIZER,
PTHREAD_COND_INITIALIZER,
false
};
/****** uti/thread_ctrl/sge_thread_has_shutdown_started() **********************
* NAME
* sge_thread_has_shutdown_started() -- shutdown in progress?
*
* SYNOPSIS
* bool sge_thread_has_shutdown_started(void)
*
* FUNCTION
* Service function which can be used to check if the executing
* component is already shutting down.
*
* INPUTS
* void - NONE
*
* RESULT
* bool - is in progress?
* true - yes
* false - no
*
* NOTES
* MT-NOTE: sge_thread_has_shutdown_started() is MT safe
*******************************************************************************/
bool
sge_thread_has_shutdown_started(void)
{
bool res = false;
DENTER(THREAD_LAYER, "sge_thread_has_shutdown_started");
sge_mutex_lock(THREAD_CONTROL_MUTEX, SGE_FUNC, __LINE__, &Thread_Control.mutex);
res = Thread_Control.shutdown_started;
sge_mutex_unlock(THREAD_CONTROL_MUTEX, SGE_FUNC, __LINE__, &Thread_Control.mutex);
DEXIT;
return res;
}
/****** uti/thread_ctrl/sge_thread_notify_all_waiting() ************************
* NAME
* sge_thread_notify_all_waiting() -- notify waiting thread
*
* SYNOPSIS
* void sge_thread_notify_all_waiting(void)
*
* FUNCTION
* After the main thread has initialized all needed components and
* threads it waits for a certain condition to be signaled
* (sge_thread_wait_for_signal).
* This signal will start the shutdown process of the master.
* This function triggers this signal.
*
* INPUTS
* void - NONE
*
* RESULT
* void - NONE
*
* NOTES
* MT-NOTE: sge_thread_notify_all_waiting() is MT safe
*
* SEE ALSO
* uti/thread_ctrl/sge_thread_wait_for_signal()
*******************************************************************************/
void
sge_thread_notify_all_waiting(void)
{
DENTER(THREAD_LAYER, "sge_thread_notify_all_waiting");
sge_mutex_lock(THREAD_CONTROL_MUTEX, SGE_FUNC, __LINE__, &Thread_Control.mutex);
Thread_Control.shutdown_started = true;
pthread_cond_broadcast(&Thread_Control.cond_var);
sge_mutex_unlock(THREAD_CONTROL_MUTEX, SGE_FUNC, __LINE__, &Thread_Control.mutex);
DRETURN_VOID;
}
/****** uti/thread_ctrl/sge_thread_wait_for_signal() ***************************
* NAME
* sge_thread_wait_for_signal() -- block current thread till shutdown
*
* SYNOPSIS
* void sge_thread_wait_for_signal(void)
*
* FUNCTION
* A call of this function will block the executing thread until the
* shutdown of the process is triggered via sge_thread_notify_all_waiting()
*
* INPUTS
* void - NONE
*
* RESULT
* void - NONE
*
* NOTES
* MT-NOTE: sge_thread_wait_for_signal() is not MT safe
*
* SEE ALSO
* uti/thread_ctrl/sge_thread_notify_all_waiting()
*******************************************************************************/
void
sge_thread_wait_for_signal(void)
{
DENTER(THREAD_LAYER, "sge_thread_wait_for_signal");
sge_mutex_lock(THREAD_CONTROL_MUTEX, SGE_FUNC, __LINE__, &Thread_Control.mutex);
while (Thread_Control.shutdown_started == false) {
pthread_cond_wait(&Thread_Control.cond_var, &Thread_Control.mutex);
}
sge_mutex_unlock(THREAD_CONTROL_MUTEX, SGE_FUNC, __LINE__, &Thread_Control.mutex);
DEXIT;
return;
}
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