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thread.h
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C/C++ Source or Header
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2005-12-20
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3KB
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84 lines
/*
Copyright (C) 2004 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
$Id: thread.h,v 1.3 2004/09/15 16:56:04 joq Exp $
*/
#ifndef __jack_thread_h__
#define __jack_thread_h__
#ifdef __cplusplus
extern "C" {
#endif
#include <pthread.h>
/** @file thread.h
*
* Library functions to standardize thread creation for JACK and its
* clients. These interfaces hide some system variations in the
* handling of realtime scheduling and associated privileges.
*/
/**
* Attempt to enable realtime scheduling for a thread. On some
* systems that may require special privileges.
*
* @param thread POSIX thread ID.
* @param priority requested thread priority.
*
* @returns 0, if successful; EPERM, if the calling process lacks
* required realtime privileges; otherwise some other error number.
*/
int jack_acquire_real_time_scheduling (pthread_t thread, int priority);
/**
* Create a thread for JACK or one of its clients. The thread is
* created executing @a start_routine with @a arg as its sole
* argument.
*
* @param thread place to return POSIX thread ID.
* @param priority thread priority, if realtime.
* @param realtime true for the thread to use realtime scheduling. On
* some systems that may require special privileges.
* @param start_routine function the thread calls when it starts.
* @param arg parameter passed to the @a start_routine.
*
* @returns 0, if successful; EPERM, if the calling process lacks
* required realtime privileges; otherwise some other error number.
*/
int jack_create_thread (pthread_t *thread,
int priority,
int realtime, /* boolean */
void *(*start_routine)(void*),
void *arg);
/**
* Drop realtime scheduling for a thread.
*
* @param thread POSIX thread ID.
*
* @returns 0, if successful; otherwise an error number.
*/
int jack_drop_real_time_scheduling (pthread_t thread);
#ifdef __cplusplus
}
#endif
#endif /* __jack_thread_h__ */