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Cleanups. Define FUTEX_CMP_REQUEUE and lll_futex_requeue.

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This commit is contained in:
Ulrich Drepper 2007-01-11 04:58:18 +00:00
parent 1c7c7e9095
commit 929340bf57
1 changed files with 22 additions and 6 deletions
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28
nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
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@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -35,6 +35,7 @@
#define SYS_futex 202
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_LOCK_PI 6
#define FUTEX_UNLOCK_PI 7
#define FUTEX_TRYLOCK_PI 8
@ -150,7 +151,7 @@ LLL_STUB_UNWIND_INFO_END
#define lll_futex_wait(futex, val) \
({ \
int __status; \
register __typeof (val) _val asm ("edx") = (val); \
register __typeof (val) _val __asm ("edx") = (val); \
__asm __volatile ("xorq %%r10, %%r10\n\t" \
"syscall" \
: "=a" (__status) \
@ -163,22 +164,22 @@ LLL_STUB_UNWIND_INFO_END
#define lll_futex_timed_wait(futex, val, timeout) \
({ \
register const struct timespec *__to __asm__ ("r10") = timeout; \
register const struct timespec *__to __asm ("r10") = timeout; \
int __status; \
register __typeof (val) _val asm ("edx") = (val); \
register __typeof (val) _val __asm ("edx") = (val); \
__asm __volatile ("syscall" \
: "=a" (__status) \
: "0" (SYS_futex), "D" (futex), "S" (FUTEX_WAIT), \
"d" (_val), "r" (__to) \
: "memory", "cc", "r11", "cx"); \
__status; \
-__status; \
})
#define lll_futex_wake(futex, nr) \
do { \
int __ignore; \
register __typeof (nr) _nr asm ("edx") = (nr); \
register __typeof (nr) _nr __asm ("edx") = (nr); \
__asm __volatile ("syscall" \
: "=a" (__ignore) \
: "0" (SYS_futex), "D" (futex), "S" (FUTEX_WAKE), \
@ -423,6 +424,21 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden;
: "cx", "r11", "cc", "memory"); })
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_requeue(ftx, nr_wake, nr_move, mutex, val) \
({ int __res; \
register int __nr_move __asm ("r10") = nr_move; \
register void *__mutex __asm ("r8") = mutex; \
register int __val __asm ("r9") = val; \
__asm __volatile ("syscall" \
: "=a" (__res) \
: "0" (__NR_futex), "D" ((void *) ftx), \
"S" (FUTEX_CMP_REQUEUE), "d" (nr_wake), \
"r" (__nr_move), "r" (__mutex), "r" (__val) \
: "cx", "r11", "cc", "memory"); \
__res < 0; })
#define lll_mutex_islocked(futex) \
(futex != LLL_MUTEX_LOCK_INITIALIZER)