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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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16
nptl/ChangeLog
View File

@ -1,5 +1,21 @@
2004-02-26 Ulrich Drepper <drepper@redhat.com>
* 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.
* pthread_attr_getstackaddr.c (__pthread_attr_getstackaddr): Don't
fail if stack address hasn't been set. Just return 0.

18
nptl/pthread_attr_setschedparam.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -28,23 +28,15 @@ __pthread_attr_setschedparam (attr, param)
pthread_attr_t *attr;
const struct sched_param *param;
{
struct pthread_attr *iattr;
int max_prio;
int min_prio;
assert (sizeof (*attr) >= sizeof (struct pthread_attr));
iattr = (struct pthread_attr *) attr;
max_prio = __sched_get_priority_max (iattr->schedpolicy);
min_prio = __sched_get_priority_min (iattr->schedpolicy);
/* Catch invalid values. */
if (param->sched_priority < min_prio || param->sched_priority > max_prio)
return EINVAL;
struct pthread_attr *iattr = (struct pthread_attr *) attr;
/* Copy the new values. */
memcpy (&iattr->schedparam, param, sizeof (struct sched_param));
/* Remember we set the value. */
iattr->flags |= ATTR_FLAG_SCHED_SET;
return 0;
}
strong_alias (__pthread_attr_setschedparam, pthread_attr_setschedparam)

5
nptl/pthread_attr_setschedpolicy.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -39,6 +39,9 @@ __pthread_attr_setschedpolicy (attr, policy)
/* Store the new values. */
iattr->schedpolicy = policy;
/* Remember we set the value. */
iattr->flags |= ATTR_FLAG_POLICY_SET;
return 0;
}
strong_alias (__pthread_attr_setschedpolicy, pthread_attr_setschedpolicy)

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;

35
nptl/pthread_getschedparam.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.
@ -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)

3
nptl/pthread_setschedparam.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.
@ -55,6 +55,7 @@ __pthread_setschedparam (threadid, policy, param)
change in the thread descriptor. */
pd->schedpolicy = policy;
memcpy (&pd->schedparam, param, sizeof (struct sched_param));
pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET;
}
lll_unlock (pd->lock);

20
nptl/sysdeps/pthread/createthread.c
View File

@ -93,11 +93,24 @@ do_clone (struct pthread *pd, const struct pthread_attr *attr,
send it the cancellation signal. */
INTERNAL_SYSCALL_DECL (err2);
err_out:
#if __ASSUME_TGKILL
(void) INTERNAL_SYSCALL (tgkill, err2, 3,
THREAD_GETMEM (THREAD_SELF, pid),
pd->tid, SIGCANCEL);
# ifdef __ASSUME_CLONE_STOPPED
/* Then wake it up so that the signal can be processed. */
(void) INTERNAL_SYSCALL (tgkill, err2, 3,
THREAD_GETMEM (THREAD_SELF, pid),
pd->tid, SIGCONT);
# endif
#else
(void) INTERNAL_SYSCALL (tkill, err2, 2, pd->tid, SIGCANCEL);
#ifdef __ASSUME_CLONE_STOPPED
# ifdef __ASSUME_CLONE_STOPPED
/* Then wake it up so that the signal can be processed. */
(void) INTERNAL_SYSCALL (tkill, err2, 2, pd->tid, SIGCONT);
# endif
#endif
return INTERNAL_SYSCALL_ERRNO (res, err);
@ -116,7 +129,12 @@ do_clone (struct pthread *pd, const struct pthread_attr *attr,
#ifdef __ASSUME_CLONE_STOPPED
/* Now start the thread for real. */
# if __ASSUME_TGKILL
res = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid),
pd->tid, SIGCONT);
# else
res = INTERNAL_SYSCALL (tkill, err, 2, pd->tid, SIGCONT);
# endif
/* If something went wrong, kill the thread. */
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (res, err), 0))

4
nptl/sysdeps/unix/sysv/linux/internaltypes.h
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.
@ -48,6 +48,8 @@ struct pthread_attr
#define ATTR_FLAG_SCOPEPROCESS 0x0004
#define ATTR_FLAG_STACKADDR 0x0008
#define ATTR_FLAG_OLDATTR 0x0010
#define ATTR_FLAG_SCHED_SET 0x0020
#define ATTR_FLAG_POLICY_SET 0x0040
/* Mutex attribute data structure. */