71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
|
/*
|
||
|
* Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
|
||
|
* All rights reserved.
|
||
|
*
|
||
|
* Redistribution and use in source and binary forms, with or without
|
||
|
* modification, are permitted provided that the following conditions
|
||
|
* are met:
|
||
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer.
|
||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
* documentation and/or other materials provided with the distribution.
|
||
|
* 3. All advertising materials mentioning features or use of this software
|
||
|
* must display the following acknowledgement:
|
||
|
* This product includes software developed by John Birrell.
|
||
|
* 4. Neither the name of the author nor the names of any co-contributors
|
||
|
* may be used to endorse or promote products derived from this software
|
||
|
* without specific prior written permission.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
|
||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
* SUCH DAMAGE.
|
||
|
*
|
||
|
*/
|
||
|
#include <errno.h>
|
||
|
#ifdef _THREAD_SAFE
|
||
|
#include <pthread.h>
|
||
|
#include "pthread_private.h"
|
||
|
|
||
|
int
|
||
|
pthread_resume(pthread_t thread)
|
||
|
{
|
||
|
int ret = -1;
|
||
|
pthread_t pthread;
|
||
|
/*
|
||
|
* Search for the thread in the linked list.
|
||
|
*/
|
||
|
for (pthread = _thread_link_list; pthread != NULL && ret == -1; pthread = pthread->nxt) {
|
||
|
/* Is this the thread? */
|
||
|
if (pthread == thread) {
|
||
|
/* Found the thread. Is it suspended? */
|
||
|
if (pthread->state == PS_SUSPENDED) {
|
||
|
/* Allow the thread to run. */
|
||
|
pthread->state = PS_RUNNING;
|
||
|
ret = 0;
|
||
|
} else if (pthread->state == PS_RUNNING) {
|
||
|
/* Thread is already running. */
|
||
|
ret = 0;
|
||
|
} else {
|
||
|
/* Thread is in some other state. */
|
||
|
_thread_seterrno(_thread_run,EINVAL);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
/* Check if thread was not found. */
|
||
|
if (ret == -1) {
|
||
|
/* No such thread */
|
||
|
_thread_seterrno(_thread_run,ESRCH);
|
||
|
}
|
||
|
return(ret);
|
||
|
}
|
||
|
#endif
|