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author | julian <julian@FreeBSD.org> | 1996-01-22 00:23:58 +0000 |
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committer | julian <julian@FreeBSD.org> | 1996-01-22 00:23:58 +0000 |
commit | 529743d354ac402b1302b397159146fa46c180c5 (patch) | |
tree | d93df8a19a0cab699bfc2c0b9e4bc691251efa16 /lib/libpthread/thread/thr_setprio.c | |
parent | 619b731f5bb5e09dcf1eaf1fbd96383ca64398fd (diff) | |
download | FreeBSD-src-529743d354ac402b1302b397159146fa46c180c5.zip FreeBSD-src-529743d354ac402b1302b397159146fa46c180c5.tar.gz |
Reviewed by: julian
Submitted by: john birrel
One version of the pthreads library
another will follow with differnt actions under some cases..
not QUITE complete
Diffstat (limited to 'lib/libpthread/thread/thr_setprio.c')
-rw-r--r-- | lib/libpthread/thread/thr_setprio.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/lib/libpthread/thread/thr_setprio.c b/lib/libpthread/thread/thr_setprio.c new file mode 100644 index 0000000..e052ec3 --- /dev/null +++ b/lib/libpthread/thread/thr_setprio.c @@ -0,0 +1,80 @@ +/* + * 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_setprio(pthread_t pthread, int prio) +{ + int rval = 0; + int status; + pthread_t pthread_p; + + /* Check if the priority is invalid: */ + if (prio < PTHREAD_MIN_PRIORITY || prio > PTHREAD_MAX_PRIORITY) { + /* Return an invalid argument error: */ + _thread_seterrno(_thread_run, EINVAL); + rval = -1; + } else { + /* Block signals: */ + _thread_kern_sig_block(&status); + + /* Point to the first thread in the list: */ + pthread_p = _thread_link_list; + + /* Enter a loop to search for the thread: */ + while (pthread_p != NULL && pthread_p != pthread) { + /* Point to the next thread: */ + pthread_p = pthread_p->nxt; + } + + /* Check if the thread pointer is NULL: */ + if (pthread == NULL || pthread_p == NULL) { + /* Return a 'search' error: */ + _thread_seterrno(_thread_run, ESRCH); + rval = -1; + } else { + /* Set the thread priority: */ + pthread->pthread_priority = prio; + } + + /* Unblock signals: */ + _thread_kern_sig_unblock(status); + } + + /* Return the error status: */ + return (rval); +} +#endif |