diff options
author | Austin Foxley <austinf@cetoncorp.com> | 2010-02-16 12:27:18 -0800 |
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committer | Austin Foxley <austinf@cetoncorp.com> | 2010-02-16 12:27:18 -0800 |
commit | a032a6587011cbdac8c2f7e11f15dc4e592bbb55 (patch) | |
tree | b8d8dfc6abf0168e098223c2134a3e4bd7640942 /libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h | |
parent | 70f1d42b13a741f603472f405299e5d2938aa728 (diff) |
mass sync with glibc nptl
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h')
-rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h | 311 |
1 files changed, 219 insertions, 92 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h index 45339f5e0..d7fada991 100644 --- a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.h @@ -1,4 +1,5 @@ -/* Copyright (C) 2003, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009 + Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -19,28 +20,107 @@ #ifndef _LOWLEVELLOCK_H #define _LOWLEVELLOCK_H 1 -#include <syscall.h> +#ifndef __ASSEMBLER__ #include <time.h> #include <sys/param.h> #include <bits/pthreadtypes.h> +#include <bits/kernel-features.h> +#endif +#define SYS_futex 240 #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 +#define FUTEX_CMP_REQUEUE 4 +#define FUTEX_WAKE_OP 5 +#define FUTEX_LOCK_PI 6 +#define FUTEX_UNLOCK_PI 7 +#define FUTEX_TRYLOCK_PI 8 +#define FUTEX_WAIT_BITSET 9 +#define FUTEX_WAKE_BITSET 10 +#define FUTEX_PRIVATE_FLAG 128 +#define FUTEX_CLOCK_REALTIME 256 + +#define FUTEX_BITSET_MATCH_ANY 0xffffffff + +#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) + +/* Values for 'private' parameter of locking macros. Yes, the + definition seems to be backwards. But it is not. The bit will be + reversed before passing to the system call. */ +#define LLL_PRIVATE 0 +#define LLL_SHARED FUTEX_PRIVATE_FLAG + + +#if !defined NOT_IN_libc || defined IS_IN_rtld +/* In libc.so or ld.so all futexes are private. */ +# ifdef __ASSUME_PRIVATE_FUTEX +# define __lll_private_flag(fl, private) \ + ((fl) | FUTEX_PRIVATE_FLAG) +# else +# define __lll_private_flag(fl, private) \ + ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) +# endif +#else +# ifdef __ASSUME_PRIVATE_FUTEX +# define __lll_private_flag(fl, private) \ + (((fl) | FUTEX_PRIVATE_FLAG) ^ (private)) +# else +# define __lll_private_flag(fl, private) \ + (__builtin_constant_p (private) \ + ? ((private) == 0 \ + ? ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) \ + : (fl)) \ + : ((fl) | (((private) ^ FUTEX_PRIVATE_FLAG) \ + & THREAD_GETMEM (THREAD_SELF, header.private_futex)))) +# endif +#endif +#ifndef __ASSEMBLER__ /* Initializer for compatibility lock. */ -#define LLL_MUTEX_LOCK_INITIALIZER (0) -#define LLL_MUTEX_LOCK_INITIALIZER_LOCKED (1) -#define LLL_MUTEX_LOCK_INITIALIZER_WAITERS (2) - -extern int __lll_mutex_lock_wait (int val, int *__futex) attribute_hidden; -extern int __lll_mutex_timedlock_wait (int val, int *__futex, - const struct timespec *abstime) - attribute_hidden; -extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; - +#define LLL_LOCK_INITIALIZER (0) +#define LLL_LOCK_INITIALIZER_LOCKED (1) +#define LLL_LOCK_INITIALIZER_WAITERS (2) + +extern int __lll_lock_wait_private (int val, int *__futex) + attribute_hidden; +extern int __lll_lock_wait (int val, int *__futex, int private) + attribute_hidden; +extern int __lll_timedlock_wait (int val, int *__futex, + const struct timespec *abstime, int private) + attribute_hidden; +extern int __lll_robust_lock_wait (int val, int *__futex, int private) + attribute_hidden; +extern int __lll_robust_timedlock_wait (int val, int *__futex, + const struct timespec *abstime, + int private) + attribute_hidden; +extern int __lll_unlock_wake_private (int *__futex) attribute_hidden; +extern int __lll_unlock_wake (int *__futex, int private) attribute_hidden; + +#define lll_trylock(futex) \ + ({ unsigned char __result; \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + nop\n\ + mov r15,r1\n\ + mov #-8,r15\n\ + 0: mov.l @%1,r2\n\ + cmp/eq r2,%3\n\ + bf 1f\n\ + mov.l %2,@%1\n\ + 1: mov r1,r15\n\ + mov #-1,%0\n\ + negc %0,%0"\ + : "=r" (__result) \ + : "r" (&(futex)), \ + "r" (LLL_LOCK_INITIALIZER_LOCKED), \ + "r" (LLL_LOCK_INITIALIZER) \ + : "r0", "r1", "r2", "t", "memory"); \ + __result; }) -#define lll_mutex_trylock(futex) \ +#define lll_robust_trylock(futex, id) \ ({ unsigned char __result; \ __asm __volatile ("\ .align 2\n\ @@ -57,12 +137,12 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; negc %0,%0"\ : "=r" (__result) \ : "r" (&(futex)), \ - "r" (LLL_MUTEX_LOCK_INITIALIZER_LOCKED), \ - "r" (LLL_MUTEX_LOCK_INITIALIZER) \ + "r" (id), \ + "r" (LLL_LOCK_INITIALIZER) \ : "r0", "r1", "r2", "t", "memory"); \ __result; }) -#define lll_mutex_cond_trylock(futex) \ +#define lll_cond_trylock(futex) \ ({ unsigned char __result; \ __asm __volatile ("\ .align 2\n\ @@ -79,12 +159,12 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; negc %0,%0"\ : "=r" (__result) \ : "r" (&(futex)), \ - "r" (LLL_MUTEX_LOCK_INITIALIZER_WAITERS), \ - "r" (LLL_MUTEX_LOCK_INITIALIZER) \ + "r" (LLL_LOCK_INITIALIZER_WAITERS), \ + "r" (LLL_LOCK_INITIALIZER) \ : "r0", "r1", "r2", "t", "memory"); \ __result; }) -#define lll_mutex_lock(futex) \ +#define lll_lock(futex, private) \ (void) ({ int __result, *__futex = &(futex); \ __asm __volatile ("\ .align 2\n\ @@ -100,11 +180,37 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; : "=&r" (__result) : "r" (1), "r" (__futex) \ : "r0", "r1", "t", "memory"); \ if (__result) \ - __lll_mutex_lock_wait (__result, __futex); }) + { \ + if (__builtin_constant_p (private) \ + && (private) == LLL_PRIVATE) \ + __lll_lock_wait_private (__result, __futex); \ + else \ + __lll_lock_wait (__result, __futex, (private)); \ + } \ + }) + +#define lll_robust_lock(futex, id, private) \ + ({ int __result, *__futex = &(futex); \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + nop\n\ + mov r15,r1\n\ + mov #-8,r15\n\ + 0: mov.l @%2,%0\n\ + tst %0,%0\n\ + bf 1f\n\ + mov.l %1,@%2\n\ + 1: mov r1,r15"\ + : "=&r" (__result) : "r" (id), "r" (__futex) \ + : "r0", "r1", "t", "memory"); \ + if (__result) \ + __result = __lll_robust_lock_wait (__result, __futex, private); \ + __result; }) /* Special version of lll_mutex_lock which causes the unlock function to always wakeup waiters. */ -#define lll_mutex_cond_lock(futex) \ +#define lll_cond_lock(futex, private) \ (void) ({ int __result, *__futex = &(futex); \ __asm __volatile ("\ .align 2\n\ @@ -120,9 +226,28 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; : "=&r" (__result) : "r" (2), "r" (__futex) \ : "r0", "r1", "t", "memory"); \ if (__result) \ - __lll_mutex_lock_wait (__result, __futex); }) + __lll_lock_wait (__result, __futex, private); }) -#define lll_mutex_timedlock(futex, timeout) \ +#define lll_robust_cond_lock(futex, id, private) \ + ({ int __result, *__futex = &(futex); \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + nop\n\ + mov r15,r1\n\ + mov #-8,r15\n\ + 0: mov.l @%2,%0\n\ + tst %0,%0\n\ + bf 1f\n\ + mov.l %1,@%2\n\ + 1: mov r1,r15"\ + : "=&r" (__result) : "r" (id | FUTEX_WAITERS), "r" (__futex) \ + : "r0", "r1", "t", "memory"); \ + if (__result) \ + __result = __lll_robust_lock_wait (__result, __futex, private); \ + __result; }) + +#define lll_timedlock(futex, timeout, private) \ ({ int __result, *__futex = &(futex); \ __asm __volatile ("\ .align 2\n\ @@ -138,10 +263,30 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; : "=&r" (__result) : "r" (1), "r" (__futex) \ : "r0", "r1", "t", "memory"); \ if (__result) \ - __result = __lll_mutex_timedlock_wait (__result, __futex, timeout); \ + __result = __lll_timedlock_wait (__result, __futex, timeout, private); \ __result; }) -#define lll_mutex_unlock(futex) \ +#define lll_robust_timedlock(futex, timeout, id, private) \ + ({ int __result, *__futex = &(futex); \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + nop\n\ + mov r15,r1\n\ + mov #-8,r15\n\ + 0: mov.l @%2,%0\n\ + tst %0,%0\n\ + bf 1f\n\ + mov.l %1,@%2\n\ + 1: mov r1,r15"\ + : "=&r" (__result) : "r" (id), "r" (__futex) \ + : "r0", "r1", "t", "memory"); \ + if (__result) \ + __result = __lll_robust_timedlock_wait (__result, __futex, \ + timeout, private); \ + __result; }) + +#define lll_unlock(futex, private) \ (void) ({ int __result, *__futex = &(futex); \ __asm __volatile ("\ .align 2\n\ @@ -155,22 +300,45 @@ extern int __lll_mutex_unlock_wake (int *__futex) attribute_hidden; : "=&r" (__result) : "r" (__futex) \ : "r0", "r1", "memory"); \ if (__result) \ - __lll_mutex_unlock_wake (__futex); }) - -#define lll_mutex_islocked(futex) \ - (futex != 0) - - -/* We have a separate internal lock implementation which is not tied - to binary compatibility. */ - -/* Type for lock object. */ -typedef int lll_lock_t; - -/* Initializers for lock. */ -#define LLL_LOCK_INITIALIZER (0) -#define LLL_LOCK_INITIALIZER_LOCKED (1) + { \ + if (__builtin_constant_p (private) \ + && (private) == LLL_PRIVATE) \ + __lll_unlock_wake_private (__futex); \ + else \ + __lll_unlock_wake (__futex, (private)); \ + } \ + }) + +#define lll_robust_unlock(futex, private) \ + (void) ({ int __result, *__futex = &(futex); \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + mov r15,r1\n\ + mov #-6,r15\n\ + 0: mov.l @%1,%0\n\ + and %2,%0\n\ + mov.l %0,@%1\n\ + 1: mov r1,r15"\ + : "=&r" (__result) : "r" (__futex), "r" (FUTEX_WAITERS) \ + : "r0", "r1", "memory"); \ + if (__result) \ + __lll_unlock_wake (__futex, private); }) +#define lll_robust_dead(futex, private) \ + (void) ({ int __ignore, *__futex = &(futex); \ + __asm __volatile ("\ + .align 2\n\ + mova 1f,r0\n\ + mov r15,r1\n\ + mov #-6,r15\n\ + 0: mov.l @%1,%0\n\ + or %2,%0\n\ + mov.l %0,@%1\n\ + 1: mov r1,r15"\ + : "=&r" (__ignore) : "r" (__futex), "r" (FUTEX_OWNER_DIED) \ + : "r0", "r1", "memory"); \ + lll_futex_wake (__futex, 1, private); }) # ifdef NEED_SYSCALL_INST_PAD # define SYSCALL_WITH_INST_PAD "\ @@ -180,27 +348,17 @@ typedef int lll_lock_t; trapa #0x14" # endif -#define lll_futex_wait(futex, val) \ - do { \ - int __ignore; \ - register unsigned long __r3 __asm ("r3") = SYS_futex; \ - register unsigned long __r4 __asm ("r4") = (unsigned long) (futex); \ - register unsigned long __r5 __asm ("r5") = FUTEX_WAIT; \ - register unsigned long __r6 __asm ("r6") = (unsigned long) (val); \ - register unsigned long __r7 __asm ("r7") = 0; \ - __asm __volatile (SYSCALL_WITH_INST_PAD \ - : "=z" (__ignore) \ - : "r" (__r3), "r" (__r4), "r" (__r5), \ - "r" (__r6), "r" (__r7) \ - : "memory", "t"); \ - } while (0) +#define lll_futex_wait(futex, val, private) \ + lll_futex_timed_wait (futex, val, NULL, private) + -#define lll_futex_timed_wait(futex, val, timeout) \ +#define lll_futex_timed_wait(futex, val, timeout, private) \ ({ \ int __status; \ register unsigned long __r3 __asm ("r3") = SYS_futex; \ register unsigned long __r4 __asm ("r4") = (unsigned long) (futex); \ - register unsigned long __r5 __asm ("r5") = FUTEX_WAIT; \ + register unsigned long __r5 __asm ("r5") \ + = __lll_private_flag (FUTEX_WAIT, private); \ register unsigned long __r6 __asm ("r6") = (unsigned long) (val); \ register unsigned long __r7 __asm ("r7") = (timeout); \ __asm __volatile (SYSCALL_WITH_INST_PAD \ @@ -212,12 +370,13 @@ typedef int lll_lock_t; }) -#define lll_futex_wake(futex, nr) \ +#define lll_futex_wake(futex, nr, private) \ do { \ int __ignore; \ register unsigned long __r3 __asm ("r3") = SYS_futex; \ register unsigned long __r4 __asm ("r4") = (unsigned long) (futex); \ - register unsigned long __r5 __asm ("r5") = FUTEX_WAKE; \ + register unsigned long __r5 __asm ("r5") \ + = __lll_private_flag (FUTEX_WAKE, private); \ register unsigned long __r6 __asm ("r6") = (unsigned long) (nr); \ register unsigned long __r7 __asm ("r7") = 0; \ __asm __volatile (SYSCALL_WITH_INST_PAD \ @@ -228,33 +387,19 @@ typedef int lll_lock_t; } while (0) -extern int lll_unlock_wake_cb (int *__futex) attribute_hidden; - - -/* The states of a lock are: - 0 - untaken - 1 - taken by one user - 2 - taken by more users */ - -#define lll_trylock(futex) lll_mutex_trylock (futex) -#define lll_lock(futex) lll_mutex_lock (futex) -#define lll_unlock(futex) lll_mutex_unlock (futex) - #define lll_islocked(futex) \ (futex != LLL_LOCK_INITIALIZER) - /* The kernel notifies a process with 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. */ -extern int __lll_wait_tid (int *tid) attribute_hidden; #define lll_wait_tid(tid) \ do { \ __typeof (tid) *__tid = &(tid); \ while (*__tid != 0) \ - lll_futex_wait (__tid, *__tid); \ + lll_futex_wait (__tid, *__tid, LLL_SHARED); \ } while (0) extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime) @@ -271,24 +416,6 @@ extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime) } \ __result; }) - -/* 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 /* !__ASSEMBLER__ */ #endif /* lowlevellock.h */ |