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(FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define. (lll_futex_wake_unlock): Define.

This commit is contained in:
Ulrich Drepper 2005-09-08 17:39:07 +00:00
parent 4043787150
commit b9b8cf0366
5 changed files with 80 additions and 0 deletions
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16
nptl/sysdeps/unix/sysv/linux/alpha/lowlevellock.h
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@ -31,6 +31,8 @@
#define FUTEX_WAKE 1
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_WAKE_OP 5
#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
/* Initializer for compatibility lock. */
#define LLL_MUTEX_LOCK_INITIALIZER (0)
@ -73,6 +75,20 @@
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
__ret = INTERNAL_SYSCALL (futex, __err, 6, \
(futexp), FUTEX_WAKE_OP, (nr_wake), \
(nr_wake2), (futexp2), \
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})
static inline int __attribute__((always_inline))
__lll_mutex_trylock(int *futex)

11
nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
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@ -31,6 +31,8 @@
#define FUTEX_WAKE 1
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_WAKE_OP 5
#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
/* Delay in spinlock loop. */
#define BUSY_WAIT_NOP asm ("hint @pause")
@ -62,6 +64,15 @@
_r10 == -1; \
})
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_wake_unlock(ftx, nr_wake, nr_wake2, ftx2) \
({ \
DO_INLINE_SYSCALL(futex, 6, (long) (ftx), FUTEX_WAKE_OP, \
(int) (nr_wake), (int) (nr_wake2), (long) (ftx2), \
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
_r10 == -1; \
})
#define __lll_mutex_trylock(futex) \
(atomic_compare_and_exchange_val_acq (futex, 1, 0) != 0)

15
nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
View File

@ -33,6 +33,8 @@
#define FUTEX_WAKE 1
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_WAKE_OP 5
#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
/* Initializer for compatibility lock. */
#define LLL_MUTEX_LOCK_INITIALIZER (0)
@ -79,6 +81,19 @@
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 6, \
(futexp), FUTEX_WAKE_OP, (nr_wake), \
(nr_wake2), (futexp2), \
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})
#ifdef UP
# define __lll_acq_instr ""
# define __lll_rel_instr ""

23
nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h
View File

@ -30,6 +30,8 @@
#define FUTEX_WAKE 1
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_WAKE_OP 5
#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
/* Initializer for compatibility lock. */
#define LLL_MUTEX_LOCK_INITIALIZER (0)
@ -103,6 +105,27 @@
})
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_wake_unlock(futex, nr_wake, nr_wake2, futex2) \
({ \
register unsigned long int __r2 asm ("2") = (unsigned long int) (futex); \
register unsigned long int __r3 asm ("3") = FUTEX_WAKE_OP; \
register unsigned long int __r4 asm ("4") = (long int) (nr_wake); \
register unsigned long int __r5 asm ("5") = (long int) (nr_wake2); \
register unsigned long int __r6 asm ("6") = (unsigned long int) (futex2); \
register unsigned long int __r7 asm ("7") \
= (int) FUTEX_OP_CLEAR_WAKE_IF_GT_ONE; \
register unsigned long __result asm ("2"); \
\
__asm __volatile ("svc %b1" \
: "=d" (__result) \
: "i" (SYS_futex), "0" (__r2), "d" (__r3), \
"d" (__r4), "d" (__r5), "d" (__r6), "d" (__r7) \
: "cc", "memory" ); \
__result > -4096UL; \
})
#define lll_compare_and_swap(futex, oldval, newval, operation) \
do { \
__typeof (futex) __futex = (futex); \

15
nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h
View File

@ -30,6 +30,8 @@
#define FUTEX_WAKE 1
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_WAKE_OP 5
#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
/* Initializer for compatibility lock. */
#define LLL_MUTEX_LOCK_INITIALIZER (0)
@ -76,6 +78,19 @@
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
\
__ret = INTERNAL_SYSCALL (futex, __err, 6, \
(futexp), FUTEX_WAKE_OP, (nr_wake), \
(nr_wake2), (futexp2), \
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})
#ifdef __sparc32_atomic_do_lock
#error SPARC < v9 does not support compare and swap which is essential for futex based locking
#endif