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2c0b891afe
* sysdeps/unix/sysv/linux/smp.h: New file. * sysdeps/unix/sysv/linux/sh/smp.h: New file. * init.c: Define __is_smp. (__pthread_initialize_minimal_internal): Call is_smp_system to initialize __is_smp. * pthreadP.h: Declare __is_smp. Define MAX_ADAPTIVE_COUNT is necessary. * pthread_mutex_init.c: Add comment regarding __spins field. * pthread_mutex_lock.c: Implement adaptive mutex type. * pthread_mutex_timedlock.c: Likewise. * sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h (pthread_mutex_t): Add __spins field. * sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/ia64/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h: Define lll_mutex_cond_trylock. * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h: Likewise. Define BUSY_WAIT_NOP. * sysdeps/unix/sysv/linux/ia64/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: Likewise. * tst-mutex5.c: Add support for testing adaptive mutexes. * tst-mutex7.c: Likewise. * tst-mutex5a.c: New file. * tst-mutex7a.c: New file. * Makefile (tests): Add tst-mutex5a and tst-mutex7a.
276 lines
7.9 KiB
C
276 lines
7.9 KiB
C
/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#define SYS_futex 240
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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_MUTEX_LOCK_INITIALIZER_LOCKED (1)
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#define LLL_MUTEX_LOCK_INITIALIZER_WAITERS (2)
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extern int __lll_mutex_lock_wait (int val, int *__futex) attribute_hidden;
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extern int __lll_mutex_timedlock_wait (int val, int *__futex,
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const struct timespec *abstime)
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attribute_hidden;
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extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden;
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#define lll_mutex_trylock(futex) \
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({ unsigned char __result; \
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__asm __volatile ("\
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.align 2\n\
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mova 1f,r0\n\
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nop\n\
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mov r15,r1\n\
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mov #-8,r15\n\
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0: mov.l @%1,r2\n\
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cmp/eq r2,%3\n\
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bf 1f\n\
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mov.l %2,@%1\n\
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1: mov r1,r15\n\
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mov #-1,%0\n\
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negc %0,%0"\
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: "=r" (__result) \
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: "r" (&(futex)), \
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"r" (LLL_MUTEX_LOCK_INITIALIZER_LOCKED), \
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"r" (LLL_MUTEX_LOCK_INITIALIZER) \
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: "r0", "r1", "r2", "t", "memory"); \
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__result; })
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#define lll_mutex_cond_trylock(futex) \
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({ unsigned char __result; \
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__asm __volatile ("\
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.align 2\n\
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mova 1f,r0\n\
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nop\n\
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mov r15,r1\n\
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mov #-8,r15\n\
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0: mov.l @%1,r2\n\
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cmp/eq r2,%3\n\
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bf 1f\n\
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mov.l %2,@%1\n\
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1: mov r1,r15\n\
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mov #-1,%0\n\
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negc %0,%0"\
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: "=r" (__result) \
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: "r" (&(futex)), \
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"r" (LLL_MUTEX_LOCK_INITIALIZER_WAITERS), \
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"r" (LLL_MUTEX_LOCK_INITIALIZER) \
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: "r0", "r1", "r2", "t", "memory"); \
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__result; })
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#define lll_mutex_lock(futex) \
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(void) ({ int __result, val, *__futex = &(futex); \
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__asm __volatile ("\
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.align 2\n\
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mova 1f,r0\n\
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mov r15,r1\n\
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mov #-8,r15\n\
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0: mov.l @%2,%0\n\
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tst %0,%0\n\
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bf 1f\n\
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mov.l %1,@%2\n\
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1: mov r1,r15"\
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: "=&r" (__result) : "r" (1), "r" (__futex) \
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: "r0", "r1", "t", "memory"); \
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if (__result) \
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__lll_mutex_lock_wait (__result, __futex); })
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/* Special version of lll_mutex_lock which causes the unlock function to
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always wakeup waiters. */
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#define lll_mutex_cond_lock(futex) \
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(void) ({ int __result, val, *__futex = &(futex); \
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__asm __volatile ("\
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.align 2\n\
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mova 1f,r0\n\
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mov r15,r1\n\
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mov #-8,r15\n\
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0: mov.l @%2,%0\n\
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tst %0,%0\n\
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bf 1f\n\
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mov.l %1,@%2\n\
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1: mov r1,r15"\
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: "=&r" (__result) : "r" (2), "r" (__futex) \
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: "r0", "r1", "t", "memory"); \
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if (__result) \
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__lll_mutex_lock_wait (__result, __futex); })
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#define lll_mutex_timedlock(futex, timeout) \
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({ int __result, val, *__futex = &(futex); \
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__asm __volatile ("\
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.align 2\n\
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mova 1f,r0\n\
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mov r15,r1\n\
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mov #-8,r15\n\
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0: mov.l @%2,%0\n\
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tst %0,%0\n\
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bf 1f\n\
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mov.l %1,@%2\n\
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1: mov r1,r15"\
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: "=&r" (__result) : "r" (1), "r" (__futex) \
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: "r0", "r1", "t", "memory"); \
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if (__result) \
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__result = __lll_mutex_timedlock_wait (__result, __futex, timeout); \
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__result; })
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#define lll_mutex_unlock(futex) \
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(void) ({ int __result, *__futex = &(futex); \
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__asm __volatile ("\
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.align 2\n\
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mova 1f,r0\n\
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mov r15,r1\n\
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mov #-6,r15\n\
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0: mov.l @%1,%0\n\
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add #-1,%0\n\
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mov.l %0,@%1\n\
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1: mov r1,r15"\
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: "=&r" (__result) : "r" (__futex) \
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: "r0", "r1", "memory"); \
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if (__result) \
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__lll_mutex_unlock_wake (__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. */
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/* Type for lock object. */
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typedef int lll_lock_t;
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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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# ifdef NEED_SYSCALL_INST_PAD
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# define SYSCALL_WITH_INST_PAD "\
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trapa #0x14; or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0"
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# else
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# define SYSCALL_WITH_INST_PAD "\
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trapa #0x14"
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# endif
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#define lll_futex_wait(futex, val) \
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do { \
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int __ignore; \
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register unsigned long __r3 asm ("r3") = SYS_futex; \
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register unsigned long __r4 asm ("r4") = (unsigned long) (futex); \
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register unsigned long __r5 asm ("r5") = FUTEX_WAIT; \
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register unsigned long __r6 asm ("r6") = (unsigned long) (val); \
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register unsigned long __r7 asm ("r7") = 0; \
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__asm __volatile (SYSCALL_WITH_INST_PAD \
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: "=z" (__ignore) \
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: "r" (__r3), "r" (__r4), "r" (__r5), \
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"r" (__r6), "r" (__r7) \
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: "memory", "t"); \
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} while (0)
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#define lll_futex_wake(futex, nr) \
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do { \
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int __ignore; \
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register unsigned long __r3 asm ("r3") = SYS_futex; \
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register unsigned long __r4 asm ("r4") = (unsigned long) (futex); \
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register unsigned long __r5 asm ("r5") = FUTEX_WAKE; \
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register unsigned long __r6 asm ("r6") = (unsigned long) (nr); \
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register unsigned long __r7 asm ("r7") = 0; \
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__asm __volatile (SYSCALL_WITH_INST_PAD \
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: "=z" (__ignore) \
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: "r" (__r3), "r" (__r4), "r" (__r5), \
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"r" (__r6), "r" (__r7) \
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: "memory", "t"); \
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} while (0)
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extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
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/* The states of a lock are:
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0 - untaken
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1 - taken by one user
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2 - taken by more users */
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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) \
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(futex != LLL_LOCK_INITIALIZER)
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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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extern int __lll_wait_tid (int *tid) attribute_hidden;
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#define lll_wait_tid(tid) \
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do { \
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__typeof (tid) *__tid = &(tid); \
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while (*__tid != 0) \
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lll_futex_wait (__tid, *__tid); \
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} while (0)
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extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime)
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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 __result = 0; \
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if (tid != 0) \
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{ \
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if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) \
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__result = EINVAL; \
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else \
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__result = __lll_timedwait_tid (&tid, abstime); \
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} \
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__result; })
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/* Conditional variable handling. */
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extern void __lll_cond_wait (pthread_cond_t *cond) 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) attribute_hidden;
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extern void __lll_cond_broadcast (pthread_cond_t *cond) 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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