mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-31 22:10:34 +03:00
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _SYS_TAS_H
|
|
#define _SYS_TAS_H 1
|
|
|
|
#include <features.h>
|
|
#include <sgidefs.h>
|
|
#include <sys/sysmips.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
extern int _test_and_set (int *p, int v) __THROW;
|
|
|
|
#ifdef __USE_EXTERN_INLINES
|
|
|
|
# ifndef _EXTERN_INLINE
|
|
# define _EXTERN_INLINE extern __inline
|
|
# endif
|
|
|
|
# if (_MIPS_ISA >= _MIPS_ISA_MIPS2)
|
|
|
|
_EXTERN_INLINE int
|
|
_test_and_set (int *p, int v) __THROW
|
|
{
|
|
int r, t;
|
|
|
|
__asm__ __volatile__
|
|
("/* Inline test and set */\n"
|
|
"1:\n\t"
|
|
"ll %0,%3\n\t"
|
|
"move %1,%4\n\t"
|
|
"beq %0,%4,2f\n\t"
|
|
"sc %1,%2\n\t"
|
|
"beqz %1,1b\n"
|
|
"2:\n\t"
|
|
"/* End test and set */"
|
|
: "=&r" (r), "=&r" (t), "=m" (*p)
|
|
: "m" (*p), "r" (v)
|
|
: "memory");
|
|
|
|
return r;
|
|
}
|
|
|
|
# else /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */
|
|
|
|
_EXTERN_INLINE int
|
|
_test_and_set (int *p, int v) __THROW
|
|
{
|
|
return sysmips (MIPS_ATOMIC_SET, (int) p, v, 0);
|
|
}
|
|
|
|
# endif /* !(_MIPS_ISA >= _MIPS_ISA_MIPS2) */
|
|
|
|
#endif /* __USE_EXTERN_INLINES */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* sys/tas.h */
|