mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 19:21:05 +00:00
f3c13160fe
PowerPC port contributed by Paul Mackerras <paulus@samba.org>. * sysdeps/pthread/pthread_spin_init.c: New file. * sysdeps/pthread/pthread_spin_unlock.c: New file. * sysdeps/powerpc/Makefile: New file. * sysdeps/powerpc/pthread_spin_lock.c: New file. * sysdeps/powerpc/pthread_spin_trylock.c: New file. * sysdeps/powerpc/pthreaddef.h: New file. * sysdeps/powerpc/tcb-offsets.sym: New file. * sysdeps/powerpc/td_ta_map_lwp2thr.c: New file. * sysdeps/powerpc/tls.h: New file. * sysdeps/powerpc/bits/atomic.h: New file. * sysdeps/unix/sysv/linux/libc-lowlevelmutex.c: New file. * sysdeps/unix/sysv/linux/libc-lowlevellock.c: New file. * sysdeps/unix/sysv/linux/lowlevellock.c: New file. * sysdeps/unix/sysv/linux/sem_post.c: New file. * sysdeps/unix/sysv/linux/sem_timedwait.c: New file. * sysdeps/unix/sysv/linux/sem_trywait.c: New file. * sysdeps/unix/sysv/linux/powerpc/Makefile: New file. * sysdeps/unix/sysv/linux/powerpc/createthread.c: New file. * sysdeps/unix/sysv/linux/powerpc/fork.c: New file. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: New file. * sysdeps/unix/sysv/linux/powerpc/pt-vfork.S: New file. * sysdeps/unix/sysv/linux/powerpc/pthread_once.c: New file. * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: New file. * sysdeps/unix/sysv/linux/powerpc/bits/semaphore.h: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h: New file.
225 lines
6.7 KiB
C
225 lines
6.7 KiB
C
/* Copyright (C) 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
|
|
|
|
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 Libr \ary; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _LOWLEVELLOCK_H
|
|
#define _LOWLEVELLOCK_H 1
|
|
|
|
#include <time.h>
|
|
#include <sys/param.h>
|
|
#include <bits/pthreadtypes.h>
|
|
|
|
#define __NR_futex 221
|
|
#define FUTEX_WAIT 0
|
|
#define FUTEX_WAKE 1
|
|
|
|
/* Initializer for compatibility lock. */
|
|
#define LLL_MUTEX_LOCK_INITIALIZER (0)
|
|
|
|
#define lll_futex_wait(futexp, val) \
|
|
({ \
|
|
INTERNAL_SYSCALL_DECL (__err); \
|
|
long int __ret; \
|
|
\
|
|
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
|
|
(futexp), FUTEX_WAIT, (val), 0); \
|
|
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
|
|
})
|
|
|
|
#define lll_futex_timed_wait(futexp, val, timespec) \
|
|
({ \
|
|
INTERNAL_SYSCALL_DECL (__err); \
|
|
long int __ret; \
|
|
\
|
|
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
|
|
(futexp), FUTEX_WAIT, (val), (timespec)); \
|
|
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
|
|
})
|
|
|
|
#define lll_futex_wake(futexp, nr) \
|
|
({ \
|
|
INTERNAL_SYSCALL_DECL (__err); \
|
|
long int __ret; \
|
|
\
|
|
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
|
|
(futexp), FUTEX_WAKE, (nr), 0); \
|
|
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret: 0; \
|
|
})
|
|
|
|
#ifdef UP
|
|
#define __lll_acq_instr ""
|
|
#define __lll_rel_instr ""
|
|
#else
|
|
#define __lll_acq_instr "isync"
|
|
#define __lll_rel_instr "sync"
|
|
#endif
|
|
|
|
/* Set *futex to 1 if it is 0, atomically. Returns the old value */
|
|
#define __lll_trylock(futex) \
|
|
({ int __val; \
|
|
__asm __volatile ("1: lwarx %0,0,%2\n" \
|
|
" cmpwi 0,%0,0\n" \
|
|
" bne 2f\n" \
|
|
" stwcx. %3,0,%2\n" \
|
|
" bne- 1b\n" \
|
|
"2: " __lll_acq_instr \
|
|
: "=&r" (__val), "=m" (*futex) \
|
|
: "r" (futex), "r" (1), "1" (*futex) \
|
|
: "cr0", "memory"); \
|
|
__val; \
|
|
})
|
|
|
|
#define lll_mutex_trylock(lock) __lll_trylock(&(lock))
|
|
|
|
/* Add inc to *futex atomically and return the old value. */
|
|
#define __lll_add(futex, inc) \
|
|
({ int __val, __tmp; \
|
|
__asm __volatile ("1: lwarx %0,0,%3\n" \
|
|
" addi %1,%0,%4\n" \
|
|
" stwcx. %1,0,%3\n" \
|
|
" bne- 1b" \
|
|
: "=&b" (__val), "=&r" (__tmp), "=m" (*futex) \
|
|
: "r" (futex), "I" (inc), "2" (*futex) \
|
|
: "cr0"); \
|
|
__val; \
|
|
})
|
|
|
|
extern void __lll_lock_wait (int *futex, int val) attribute_hidden;
|
|
|
|
#define lll_mutex_lock(lock) \
|
|
(void) ({ \
|
|
int *__futex = &(lock); \
|
|
int __val = __lll_add (__futex, 1); \
|
|
__asm __volatile (__lll_acq_instr ::: "memory"); \
|
|
if (__builtin_expect (__val != 0, 0)) \
|
|
__lll_lock_wait (__futex, __val); \
|
|
})
|
|
|
|
extern int __lll_timedlock_wait
|
|
(int *futex, int val, const struct timespec *) attribute_hidden;
|
|
|
|
#define lll_mutex_timedlock(lock, abstime) \
|
|
({ int *__futex = &(lock); \
|
|
int __val = __lll_add (__futex, 1); \
|
|
__asm __volatile (__lll_acq_instr ::: "memory"); \
|
|
if (__builtin_expect (__val != 0, 0)) \
|
|
__val = __lll_timedlock_wait (__futex, __val, (abstime)); \
|
|
__val; \
|
|
})
|
|
|
|
#define lll_mutex_unlock(lock) \
|
|
(void) ({ \
|
|
int *__futex = &(lock); \
|
|
__asm __volatile (__lll_rel_instr ::: "memory"); \
|
|
int __val = __lll_add (__futex, -1); \
|
|
if (__builtin_expect (__val != 1, 0)) \
|
|
{ \
|
|
*__futex = 0; \
|
|
lll_futex_wake (__futex, 1); \
|
|
} \
|
|
})
|
|
|
|
#define lll_mutex_islocked(futex) \
|
|
(futex != 0)
|
|
|
|
|
|
/* Our internal lock implementation is identical to the binary-compatible
|
|
mutex implementation. */
|
|
|
|
/* Type for lock object. */
|
|
typedef int lll_lock_t;
|
|
|
|
/* Initializers for lock. */
|
|
#define LLL_LOCK_INITIALIZER (0)
|
|
#define LLL_LOCK_INITIALIZER_LOCKED (1)
|
|
|
|
extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
|
|
|
|
/* The states of a lock are:
|
|
0 - untaken
|
|
1 - taken by one user
|
|
>1 - taken by more users */
|
|
|
|
#define lll_trylock(lock) lll_mutex_trylock (lock)
|
|
#define lll_lock(lock) lll_mutex_lock (lock)
|
|
#define lll_unlock(lock) lll_mutex_unlock (lock)
|
|
#define lll_islocked(lock) lll_mutex_islocked (lock)
|
|
|
|
/* The kernel notifies a process which uses CLONE_CLEARTID via futex
|
|
wakeup when the clone terminates. The memory location contains the
|
|
thread ID while the clone is running and is reset to zero
|
|
afterwards. */
|
|
#define lll_wait_tid(tid) \
|
|
do { \
|
|
__typeof (tid) __tid; \
|
|
while ((__tid = (tid)) != 0) \
|
|
lll_futex_wait (&(tid), __tid); \
|
|
} while (0)
|
|
|
|
extern int __lll_timedwait_tid (int *, const struct timespec *)
|
|
attribute_hidden;
|
|
|
|
#define lll_timedwait_tid(tid, abstime) \
|
|
({ \
|
|
int __res = 0; \
|
|
if ((tid) != 0) \
|
|
__res = __lll_timedwait_tid (&(tid), (abstime)); \
|
|
__res; \
|
|
})
|
|
|
|
|
|
/* Decrement *futex if it is > 0, and return the old value */
|
|
#define __lll_dec_if_positive(futex) \
|
|
({ int __val, __tmp; \
|
|
__asm __volatile ("1: lwarx %0,0,%3\n" \
|
|
" cmpwi 0,%0,0\n" \
|
|
" addi %1,%0,-1\n" \
|
|
" ble 2f\n" \
|
|
" stwcx. %1,0,%3\n" \
|
|
" bne- 1b\n" \
|
|
"2: " __lll_acq_instr \
|
|
: "=&b" (__val), "=&r" (__tmp), "=m" (*futex) \
|
|
: "r" (futex), "2" (*futex) \
|
|
: "cr0"); \
|
|
__val; \
|
|
})
|
|
|
|
|
|
/* Conditional variable handling. */
|
|
|
|
extern void __lll_cond_wait (pthread_cond_t *cond)
|
|
attribute_hidden;
|
|
extern int __lll_cond_timedwait (pthread_cond_t *cond,
|
|
const struct timespec *abstime)
|
|
attribute_hidden;
|
|
extern void __lll_cond_wake (pthread_cond_t *cond)
|
|
attribute_hidden;
|
|
extern void __lll_cond_broadcast (pthread_cond_t *cond)
|
|
attribute_hidden;
|
|
|
|
#define lll_cond_wait(cond) \
|
|
__lll_cond_wait (cond)
|
|
#define lll_cond_timedwait(cond, abstime) \
|
|
__lll_cond_timedwait (cond, abstime)
|
|
#define lll_cond_wake(cond) \
|
|
__lll_cond_wake (cond)
|
|
#define lll_cond_broadcast(cond) \
|
|
__lll_cond_broadcast (cond)
|
|
|
|
#endif /* lowlevellock.h */
|