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thr_getschedparam.c (158073) thr_getschedparam.c (160287)
1/*
2 * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 15 unchanged lines hidden (view full) ---

24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
1/*
2 * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 15 unchanged lines hidden (view full) ---

24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: head/lib/libthr/thread/thr_getschedparam.c 158073 2006-04-27 08:18:23Z davidxu $
32 * $FreeBSD: head/lib/libthr/thread/thr_getschedparam.c 160287 2006-07-12 06:13:18Z davidxu $
33 */
34
35#include "namespace.h"
36#include <errno.h>
37#include <pthread.h>
38#include "un-namespace.h"
39
40#include "thr_private.h"
41
42__weak_reference(_pthread_getschedparam, pthread_getschedparam);
43
44int
45_pthread_getschedparam(pthread_t pthread, int *policy,
46 struct sched_param *param)
47{
48 struct pthread *curthread = _get_curthread();
33 */
34
35#include "namespace.h"
36#include <errno.h>
37#include <pthread.h>
38#include "un-namespace.h"
39
40#include "thr_private.h"
41
42__weak_reference(_pthread_getschedparam, pthread_getschedparam);
43
44int
45_pthread_getschedparam(pthread_t pthread, int *policy,
46 struct sched_param *param)
47{
48 struct pthread *curthread = _get_curthread();
49 int ret, tmp;
49 int ret;
50
50
51 if ((param == NULL) || (policy == NULL))
52 /* Return an invalid argument error: */
53 ret = EINVAL;
54 else if (pthread == curthread) {
51 if (policy == NULL || param == NULL)
52 return (EINVAL);
53
54 if (pthread == curthread) {
55 /*
56 * Avoid searching the thread list when it is the current
57 * thread.
58 */
55 /*
56 * Avoid searching the thread list when it is the current
57 * thread.
58 */
59 THR_THREAD_LOCK(curthread, curthread);
60 param->sched_priority = pthread->base_priority;
61 tmp = pthread->attr.sched_policy;
62 THR_THREAD_UNLOCK(curthread, curthread);
63 *policy = tmp;
64 ret = 0;
59 THR_LOCK(curthread);
60
61 /*
62 * XXX Here we need two separated syscalls, atomic is only
63 * guaranteed in thread library, a new syscall is needed.
64 */
65
66 *policy = sched_getscheduler((pid_t)curthread->tid);
67 if (*policy == -1)
68 ret = errno;
69 else {
70 ret = sched_getparam((pid_t)curthread->tid, param);
71 if (ret == -1)
72 ret = errno;
73 }
74 THR_UNLOCK(curthread);
65 }
66 /* Find the thread in the list of active threads. */
67 else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
68 == 0) {
69 THR_THREAD_LOCK(curthread, pthread);
75 }
76 /* Find the thread in the list of active threads. */
77 else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
78 == 0) {
79 THR_THREAD_LOCK(curthread, pthread);
70 param->sched_priority = pthread->base_priority;
71 tmp = pthread->attr.sched_policy;
80 *policy = sched_getscheduler((pid_t)pthread->tid);
81 if (*policy == -1)
82 ret = errno;
83 else {
84 ret = sched_getparam((pid_t)pthread->tid, param);
85 if (ret == -1)
86 ret = errno;
87 }
72 THR_THREAD_UNLOCK(curthread, pthread);
73 _thr_ref_delete(curthread, pthread);
88 THR_THREAD_UNLOCK(curthread, pthread);
89 _thr_ref_delete(curthread, pthread);
74 *policy = tmp;
75 }
76 return (ret);
77}
90 }
91 return (ret);
92}