mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 02:40:06 +00:00
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* Machine-dependent pthreads configuration and inline functions.
|
|
SuperH version.
|
|
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Niibe Yutaka <gniibe@m17n.org>.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef PT_EI
|
|
# define PT_EI extern inline
|
|
#endif
|
|
|
|
/* Spinlock implementation; required. */
|
|
PT_EI long int
|
|
testandset (int *spinlock)
|
|
{
|
|
int ret;
|
|
|
|
__asm__ __volatile__(
|
|
"tas.b @%1\n\t"
|
|
"movt %0"
|
|
: "=r" (ret)
|
|
: "r" (spinlock)
|
|
: "memory", "cc");
|
|
|
|
return (ret == 0);
|
|
}
|
|
|
|
|
|
/* Get some notion of the current stack. Need not be exactly the top
|
|
of the stack, just something somewhere in the current frame. */
|
|
#define CURRENT_STACK_FRAME stack_pointer
|
|
register char * stack_pointer __asm__ ("r15");
|
|
|
|
/* Return the thread descriptor for the current thread. */
|
|
struct _pthread_descr_struct;
|
|
#define THREAD_SELF \
|
|
({ struct _pthread_descr_struct *self; \
|
|
__asm__("stc gbr,%0" : "=r" (self)); self;})
|
|
|
|
/* Initialize the thread-unique value. */
|
|
#define INIT_THREAD_SELF(descr, nr) \
|
|
({ __asm__ __volatile__("ldc %0,gbr" : : "r" (descr));})
|