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2004-03-18  Ulrich Drepper  <drepper@redhat.com>

	* posix/sched.h: Change sched_getaffinity and sched_setaffinity
	interfaces: add new second parameter.
	* sysdeps/generic/sched_getaffinity.c: Implement interface change.
	* sysdeps/generic/sched_setaffinity.c: Likewise.
	* sysdeps/unix/sysv/linux/sched_getaffinity.c: Likewise.  Add
	compatibility interface.
	* sysdeps/unix/sysv/linux/sched_setaffinity.c: Likewise.
	* sysdeps/unix/sysv/linux/Versions: Add versions for changed
	interfaces.
This commit is contained in:
Ulrich Drepper
2004-03-19 00:14:42 +00:00
parent 701a7b234e
commit 439ff07be0
18 changed files with 326 additions and 125 deletions
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59
sysdeps/unix/sysv/linux/sched_setaffinity.c
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@ -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.
The GNU C Library is free software; you can redistribute it and/or
@ -20,18 +20,65 @@
#include <sched.h>
#include <string.h>
#include <sysdep.h>
#include <unistd.h>
#include <sys/types.h>
#include <shlib-compat.h>
#ifdef __NR_sched_setaffinity
static size_t __kernel_cpumask_size;
int
sched_setaffinity (pid, cpuset)
pid_t pid;
const cpu_set_t *cpuset;
__sched_setaffinity_new (pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset)
{
return INLINE_SYSCALL (sched_setaffinity, 3, pid, sizeof (cpu_set_t),
cpuset);
if (__builtin_expect (__kernel_cpumask_size == 0, 0))
{
INTERNAL_SYSCALL_DECL (err);
int res;
size_t psize = 128;
void *p = alloca (psize);
while (res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, getpid (),
psize, p),
INTERNAL_SYSCALL_ERROR_P (res, err)
&& INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL)
p = extend_alloca (p, psize, 2 * psize);
if (res == 0 || INTERNAL_SYSCALL_ERROR_P (res, err))
{
__set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
return -1;
}
__kernel_cpumask_size = res;
}
/* We now know the size of the kernel cpumask_t. Make sure the user
does not request to set a bit beyond that. */
for (size_t cnt = __kernel_cpumask_size; cnt < cpusetsize; ++cnt)
if (((char *) cpuset)[cnt] != '\0')
/* Found a nonzero byte. This means the user request cannot be
fulfilled. */
return EINVAL;
return INLINE_SYSCALL (sched_setaffinity, 3, pid, cpusetsize, cpuset);
}
versioned_symbol (libc, __sched_setaffinity_new, sched_setaffinity,
GLIBC_2_3_4);
# if SHLIB_COMPAT(libc, 2_3_3, 2_3_4)
int
attribute_compat_text_section
__sched_setaffinity_old (const pthread_attr_t *attr, const cpu_set_t *cpuset)
{
/* The old interface by default assumed a 1024 processor bitmap. */
return __sched_setaffinity_new (attr, 128, cpuset);
}
compat_symbol (libc, __sched_setaffinity_old, sched_setaffinity, GLIBC_2_3_3);
# endif
#else
# include <sysdeps/generic/sched_setaffinity.c>
#endif