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Update.

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* 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.
This commit is contained in:
Ulrich Drepper
2004-02-27 08:09:35 +00:00
parent 261eada2ca
commit 14ffbc8350
8 changed files with 120 additions and 38 deletions
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57
nptl/pthread_create.c
View File

@@ -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.
@@ -386,7 +386,9 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
pd->arg = arg;
/* Copy the thread attribute flags. */
pd->flags = iattr->flags;
struct pthread *self = THREAD_SELF;
pd->flags = ((iattr->flags & ~(ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET))
| (self->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)));
/* Initialize the field for the ID of the thread which is waiting
for us. This is a self-reference in case the thread is created
@@ -394,25 +396,49 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
pd->joinid = iattr->flags & ATTR_FLAG_DETACHSTATE ? pd : NULL;
/* The debug events are inherited from the parent. */
pd->eventbuf = THREAD_SELF->eventbuf;
pd->eventbuf = self->eventbuf;
/* Determine scheduling parameters for the thread.
XXX How to determine whether scheduling handling is needed? */
if (0 && attr != NULL)
/* Copy the parent's scheduling parameters. The flags will say what
is valid and what is not. */
pd->schedpolicy = self->schedpolicy;
pd->schedparam = self->schedparam;
/* Determine scheduling parameters for the thread. */
if (attr != NULL
&& __builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0)
&& (iattr->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0)
{
if (iattr->flags & ATTR_FLAG_NOTINHERITSCHED)
INTERNAL_SYSCALL_DECL (err);
/* Use the scheduling parameters the user provided. */
if (iattr->flags & ATTR_FLAG_POLICY_SET)
pd->schedpolicy = iattr->schedpolicy;
else if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
{
/* Use the scheduling parameters the user provided. */
pd->schedpolicy = iattr->schedpolicy;
memcpy (&pd->schedparam, &iattr->schedparam,
sizeof (struct sched_param));
pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, err, 1, 0);
pd->flags |= ATTR_FLAG_POLICY_SET;
}
else
if (iattr->flags & ATTR_FLAG_SCHED_SET)
memcpy (&pd->schedparam, &iattr->schedparam,
sizeof (struct sched_param));
else if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
{
/* Just store the scheduling attributes of the parent. */
pd->schedpolicy = __sched_getscheduler (0);
__sched_getparam (0, &pd->schedparam);
INTERNAL_SYSCALL (sched_getparam, err, 2, 0, &pd->schedparam);
pd->flags |= ATTR_FLAG_SCHED_SET;
}
/* Check for valid priorities. */
int minprio = INTERNAL_SYSCALL (sched_get_priority_min, err, 1,
iattr->schedpolicy);
int maxprio = INTERNAL_SYSCALL (sched_get_priority_max, err, 1,
iattr->schedpolicy);
if (pd->schedparam.sched_priority < minprio
|| pd->schedparam.sched_priority > maxprio)
{
err = EINVAL;
goto errout;
}
}
@@ -423,6 +449,7 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
err = create_thread (pd, iattr, STACK_VARIABLES_ARGS);
if (err != 0)
{
errout:
/* Something went wrong. Free the resources. */
__deallocate_stack (pd);
return err;