mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
056e03583b
1999-12-28 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove oldgetrlimit and oldsetrlimit definitions.
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/* Machine-dependent pthreads configuration and inline functions.
|
|
Alpha version.
|
|
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Richard Henderson <rth@tamu.edu>.
|
|
|
|
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
|
|
|
|
#include <asm/pal.h>
|
|
|
|
|
|
/* 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__("$30");
|
|
|
|
|
|
/* Spinlock implementation; required. */
|
|
PT_EI long int
|
|
testandset (int *spinlock)
|
|
{
|
|
long int ret, temp;
|
|
|
|
__asm__ __volatile__(
|
|
"/* Inline spinlock test & set */\n"
|
|
"1:\t"
|
|
"ldl_l %0,%3\n\t"
|
|
"bne %0,2f\n\t"
|
|
"or $31,1,%1\n\t"
|
|
"stl_c %1,%2\n\t"
|
|
"beq %1,1b\n"
|
|
"2:\tmb\n"
|
|
"/* End spinlock test & set */"
|
|
: "=&r"(ret), "=&r"(temp), "=m"(*spinlock)
|
|
: "m"(*spinlock)
|
|
: "memory");
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Spinlock release; default is just set to zero. */
|
|
#define RELEASE(spinlock) \
|
|
__asm__ __volatile__("mb" : : : "memory"); \
|
|
*spinlock = 0
|
|
|
|
|
|
/* Begin allocating thread stacks at this address. Default is to allocate
|
|
them just below the initial program stack. */
|
|
#define THREAD_STACK_START_ADDRESS 0x40000000000
|
|
|
|
|
|
/* Return the thread descriptor for the current thread. */
|
|
#define THREAD_SELF \
|
|
({ \
|
|
register pthread_descr __self __asm__("$0"); \
|
|
__asm__ ("call_pal %1" : "=r"(__self) : "i"(PAL_rduniq) : "$0"); \
|
|
__self; \
|
|
})
|
|
|
|
/* Initialize the thread-unique value. */
|
|
#define INIT_THREAD_SELF(descr, nr) \
|
|
{ \
|
|
register pthread_descr __self __asm__("$16") = (descr); \
|
|
__asm__ __volatile__ ("call_pal %1" : : "r"(__self), "i"(PAL_wruniq)); \
|
|
}
|
|
|
|
|
|
/* Compare-and-swap for semaphores. */
|
|
|
|
#define HAS_COMPARE_AND_SWAP
|
|
PT_EI int
|
|
__compare_and_swap (long int *p, long int oldval, long int newval)
|
|
{
|
|
long int ret;
|
|
|
|
__asm__ __volatile__ (
|
|
"/* Inline compare & swap */\n"
|
|
"1:\t"
|
|
"ldq_l %0,%4\n\t"
|
|
"cmpeq %0,%2,%0\n\t"
|
|
"beq %0,2f\n\t"
|
|
"mov %3,%0\n\t"
|
|
"stq_c %0,%1\n\t"
|
|
"beq %0,1b\n\t"
|
|
"2:\tmb\n"
|
|
"/* End compare & swap */"
|
|
: "=&r"(ret), "=m"(*p)
|
|
: "r"(oldval), "r"(newval), "m"(*p));
|
|
|
|
return ret;
|
|
}
|