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authorUlrich Drepper <drepper@redhat.com>2004-02-27 08:09:35 +0000
committerUlrich Drepper <drepper@redhat.com>2004-02-27 08:09:35 +0000
commit14ffbc8350791ff0f33ccc65af26ebaa1b520132 (patch)
treed1fa245e05ff0de18632a76b51c2570bafd18890 /nptl/pthread_getschedparam.c
parent261eada2ca65277dcc68565370cb2d321f402c21 (diff)
downloadglibc-14ffbc8350791ff0f33ccc65af26ebaa1b520132.tar.gz
Update.
* pthread_attr_setschedparam.c: Don't test priority against limits here. Set ATTR_FLAG_SCHED_SET flag. * pthread_attr_setschedpolicy.c: Set ATTR_FLAG_POLICY_SET flag. * pthread_create.c (__pthread_create_2_1): Copy scheduling attributes from parent thread to child. If attribute is used and scheduling parameters are not inherited, copy parameters from attribute or compute them. Check priority value. * pthread_getschedparam.c: If the parameters aren't known yet get them from the kernel. * pthread_setschedparam.c: Set ATTR_FLAG_SCHED_SET and ATTR_FLAG_POLICY_SET flag for thread. * sysdeps/unix/sysv/linux/internaltypes.h: Define ATTR_FLAG_SCHED_SET and ATTR_FLAG_POLICY_SET. * sysdeps/pthread/createthread.c: Use tgkill if possible.
Diffstat (limited to 'nptl/pthread_getschedparam.c')
-rw-r--r--nptl/pthread_getschedparam.c35
1 files changed, 29 insertions, 6 deletions
diff --git a/nptl/pthread_getschedparam.c b/nptl/pthread_getschedparam.c
index d9d6cb43b0..434d867779 100644
--- a/nptl/pthread_getschedparam.c
+++ b/nptl/pthread_getschedparam.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -36,8 +36,10 @@ __pthread_getschedparam (threadid, policy, param)
/* Not a valid thread handle. */
return ESRCH;
+ int result = 0;
+
/* We have to handle cancellation in the following code since we are
- locking another threads desriptor. */
+ locking another threads descriptor. */
pthread_cleanup_push ((void (*) (void *)) lll_unlock_wake_cb, &pd->lock);
lll_lock (pd->lock);
@@ -45,14 +47,35 @@ __pthread_getschedparam (threadid, policy, param)
/* The library is responsible for maintaining the values at all
times. If the user uses a interface other than
pthread_setschedparam to modify the scheduler setting it is not
- the library's problem. */
- *policy = pd->schedpolicy;
- memcpy (param, &pd->schedparam, sizeof (struct sched_param));
+ the library's problem. In case the descriptor's values have
+ not yet been retrieved do it now. */
+ if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
+ {
+ if (__sched_getparam (pd->tid, &pd->schedparam) != 0)
+ result = 1;
+ else
+ pd->flags |= ATTR_FLAG_SCHED_SET;
+ }
+
+ if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
+ {
+ pd->schedpolicy = __sched_getscheduler (pd->tid);
+ if (pd->schedpolicy == -1)
+ result = 1;
+ else
+ pd->flags |= ATTR_FLAG_POLICY_SET;
+ }
+
+ if (result == 0)
+ {
+ *policy = pd->schedpolicy;
+ memcpy (param, &pd->schedparam, sizeof (struct sched_param));
+ }
lll_unlock (pd->lock);
pthread_cleanup_pop (0);
- return 0;
+ return result;
}
strong_alias (__pthread_getschedparam, pthread_getschedparam)