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211d90c524
* sysdeps/unix/sysv/linux/ia64/lowlevellock.h (__lll_mutex_lock): Use atomic_exchange_and_add instead of __lll_add. (__lll_mutex_timedlock): Likewise. Patch by Ian Wienand. 2003-03-24 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h (SINGLE_THREAD_P): Fix typo. * tst-cancel-wrappers.sh: Handle '.'ed symbols. 2003-03-31 Ulrich Drepper <drepper@redhat.com> * Makefile (tests): Add tst-align. * tst-align.c: New file. * sysdeps/i386/Makefile: Define CFLAGS-tst-align. * sysdeps/x86_64/Makefile: Likewise. * tst-tsd2.c: Add casts to avoid warnings.
214 lines
6.8 KiB
C
214 lines
6.8 KiB
C
/* Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _LOWLEVELLOCK_H
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#define _LOWLEVELLOCK_H 1
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#include <time.h>
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#include <sys/param.h>
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#include <bits/pthreadtypes.h>
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#include <ia64intrin.h>
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#include <atomic.h>
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#define SYS_futex 1230
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#define FUTEX_WAIT 0
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#define FUTEX_WAKE 1
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/* Initializer for compatibility lock. */
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#define LLL_MUTEX_LOCK_INITIALIZER (0)
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#define lll_futex_clobbers \
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"out4", "out5", "out6", "out7", \
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/* Non-stacked integer registers, minus r8, r10, r15. */ \
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"r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", \
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"r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", \
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"r28", "r29", "r30", "r31", \
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/* Predicate registers. */ \
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"p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", \
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/* Non-rotating fp registers. */ \
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"f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
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/* Branch registers. */ \
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"b6", "b7", \
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"memory"
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#define lll_futex_wait(futex, val) lll_futex_timed_wait (futex, val, 0)
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#define lll_futex_timed_wait(futex, val, timespec) \
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({ \
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register long int __o0 asm ("out0") = (long int) (futex); \
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register long int __o1 asm ("out1") = FUTEX_WAIT; \
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register long int __o2 asm ("out2") = (long int) (val); \
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register long int __o3 asm ("out3") = (long int) (timespec); \
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register long int __r8 asm ("r8"); \
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register long int __r10 asm ("r10"); \
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register long int __r15 asm ("r15") = SYS_futex; \
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\
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__asm __volatile ("break %7;;" \
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: "=r" (__r8), "=r" (__r10), "=r" (__r15), \
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"=r" (__o0), "=r" (__o1), "=r" (__o2), "=r" (__o3) \
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: "i" (0x100000), "2" (__r15), "3" (__o0), "4" (__o1), \
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"5" (__o2), "6" (__o3) \
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: lll_futex_clobbers); \
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__r10 == -1 ? -__r8 : __r8; \
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})
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#define lll_futex_wake(futex, nr) \
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({ \
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register long int __o0 asm ("out0") = (long int) (futex); \
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register long int __o1 asm ("out1") = FUTEX_WAKE; \
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register long int __o2 asm ("out2") = (long int) (nr); \
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register long int __r8 asm ("r8"); \
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register long int __r10 asm ("r10"); \
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register long int __r15 asm ("r15") = SYS_futex; \
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\
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__asm __volatile ("break %6;;" \
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: "=r" (__r8), "=r" (__r10), "=r" (__r15), \
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"=r" (__o0), "=r" (__o1), "=r" (__o2) \
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: "i" (0x100000), "2" (__r15), "3" (__o0), "4" (__o1), \
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"5" (__o2) \
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: "out3", lll_futex_clobbers); \
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__r10 == -1 ? -__r8 : __r8; \
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})
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static inline int
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__attribute__ ((always_inline))
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__lll_mutex_trylock (int *futex)
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{
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return atomic_compare_and_exchange_val_acq (futex, 1, 0) != 0;
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}
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#define lll_mutex_trylock(futex) __lll_mutex_trylock (&(futex))
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extern void __lll_lock_wait (int *futex, int val) attribute_hidden;
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static inline void
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__attribute__ ((always_inline))
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__lll_mutex_lock (int *futex)
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{
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int val = atomic_exchange_and_add (futex, 1);
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if (__builtin_expect (val != 0, 0))
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__lll_lock_wait (futex, val);
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}
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#define lll_mutex_lock(futex) __lll_mutex_lock (&(futex))
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extern int __lll_timedlock_wait (int *futex, int val, const struct timespec *)
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attribute_hidden;
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static inline int
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__attribute__ ((always_inline))
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__lll_mutex_timedlock (int *futex, const struct timespec *abstime)
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{
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int val = atomic_exchange_and_add (futex, 1);
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int result = 0;
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if (__builtin_expect (val != 0, 0))
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result = __lll_timedlock_wait (futex, val, abstime);
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return result;
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}
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#define lll_mutex_timedlock(futex, abstime) \
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__lll_mutex_timedlock (&(futex), abstime)
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static inline void
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__attribute__ ((always_inline))
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__lll_mutex_unlock (int *futex)
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{
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int val = atomic_exchange (futex, 0);
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if (__builtin_expect (val > 1, 0))
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lll_futex_wake (futex, 1);
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}
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#define lll_mutex_unlock(futex) __lll_mutex_unlock(&(futex))
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#define lll_mutex_islocked(futex) \
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(futex != 0)
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/* We have a separate internal lock implementation which is not tied
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to binary compatibility. We can use the lll_mutex_*. */
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/* Type for lock object. */
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typedef int lll_lock_t;
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extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
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/* Initializers for lock. */
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#define LLL_LOCK_INITIALIZER (0)
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#define LLL_LOCK_INITIALIZER_LOCKED (1)
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#define lll_trylock(futex) lll_mutex_trylock (futex)
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#define lll_lock(futex) lll_mutex_lock (futex)
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#define lll_unlock(futex) lll_mutex_unlock (futex)
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#define lll_islocked(futex) lll_mutex_islocked (futex)
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/* The kernel notifies a process with uses CLONE_CLEARTID via futex
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wakeup when the clone terminates. The memory location contains the
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thread ID while the clone is running and is reset to zero
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afterwards. */
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#define lll_wait_tid(tid) \
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do \
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{ \
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__typeof (tid) __tid; \
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while ((__tid = (tid)) != 0) \
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lll_futex_wait (&(tid), __tid); \
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} \
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while (0)
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extern int __lll_timedwait_tid (int *, const struct timespec *)
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attribute_hidden;
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#define lll_timedwait_tid(tid, abstime) \
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({ \
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int __res = 0; \
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if ((tid) != 0) \
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__res = __lll_timedwait_tid (&(tid), (abstime)); \
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__res; \
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})
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/* Conditional variable handling. */
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extern void __lll_cond_wait (pthread_cond_t *cond)
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attribute_hidden;
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extern int __lll_cond_timedwait (pthread_cond_t *cond,
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const struct timespec *abstime)
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attribute_hidden;
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extern void __lll_cond_wake (pthread_cond_t *cond)
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attribute_hidden;
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extern void __lll_cond_broadcast (pthread_cond_t *cond)
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attribute_hidden;
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#define lll_cond_wait(cond) \
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__lll_cond_wait (cond)
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#define lll_cond_timedwait(cond, abstime) \
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__lll_cond_timedwait (cond, abstime)
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#define lll_cond_wake(cond) \
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__lll_cond_wake (cond)
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#define lll_cond_broadcast(cond) \
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__lll_cond_broadcast (cond)
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#endif /* lowlevellock.h */
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