diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_resume.c')
| -rw-r--r-- | lib/libc_r/uthread/uthread_resume.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/lib/libc_r/uthread/uthread_resume.c b/lib/libc_r/uthread/uthread_resume.c new file mode 100644 index 0000000..4c5298e --- /dev/null +++ b/lib/libc_r/uthread/uthread_resume.c @@ -0,0 +1,70 @@ +/* + * 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 |
