mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
m68k: use generic lowlevellock.h
This commit is contained in:
Andreas Schwab
parent
9c82da17b5
commit
23329dcaf9
@ -1,3 +1,7 @@
|
||||
2014-07-18 Andreas Schwab <schwab@linux-m68k.org>
|
||||
|
||||
* sysdeps/unix/sysv/linux/m68k/lowlevellock.h: Removed.
|
||||
|
||||
2014-07-17 Maciej W. Rozycki <macro@codesourcery.com>
|
||||
|
||||
[BZ #17078]
|
||||
|
||||
@ -1,308 +0,0 @@
|
||||
/* Copyright (C) 2010-2014 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library. If not, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
/* Borrowed from ARM's version. */
|
||||
|
||||
#ifndef _LOWLEVELLOCK_H
|
||||
#define _LOWLEVELLOCK_H 1
|
||||
|
||||
#include <time.h>
|
||||
#include <sys/param.h>
|
||||
#include <bits/pthreadtypes.h>
|
||||
#include <atomic.h>
|
||||
#include <kernel-features.h>
|
||||
|
||||
#define FUTEX_WAIT 0
|
||||
#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)
|
||||
#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_WAIT_REQEUE_PI 11
|
||||
#define FUTEX_CMP_REQEUE_PI 12
|
||||
#define FUTEX_PRIVATE_FLAG 128
|
||||
#define FUTEX_CLOCK_REALTIME 256
|
||||
|
||||
#define FUTEX_BITSET_MATCH_ANY 0xffffffff
|
||||
|
||||
/* 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
|
||||
|
||||
|
||||
#define lll_futex_wait(futexp, val, private) \
|
||||
lll_futex_timed_wait(futexp, val, NULL, private)
|
||||
|
||||
#define lll_futex_timed_wait(futexp, val, timespec, private) \
|
||||
({ \
|
||||
INTERNAL_SYSCALL_DECL (__err); \
|
||||
long int __ret; \
|
||||
__ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \
|
||||
__lll_private_flag (FUTEX_WAIT, private), \
|
||||
(val), (timespec)); \
|
||||
__ret; \
|
||||
})
|
||||
|
||||
#define lll_futex_timed_wait_bitset(futexp, val, timespec, clockbit, private) \
|
||||
({ \
|
||||
INTERNAL_SYSCALL_DECL (__err); \
|
||||
long int __ret; \
|
||||
int __op = FUTEX_WAIT_BITSET | clockbit; \
|
||||
__ret = INTERNAL_SYSCALL (futex, __err, 6, (long) (futexp), \
|
||||
__lll_private_flag (__op, private), \
|
||||
(val), (timespec), NULL /* Unused. */, \
|
||||
FUTEX_BITSET_MATCH_ANY); \
|
||||
__ret; \
|
||||
})
|
||||
|
||||
#define lll_futex_wake(futexp, nr, private) \
|
||||
({ \
|
||||
INTERNAL_SYSCALL_DECL (__err); \
|
||||
long int __ret; \
|
||||
__ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \
|
||||
__lll_private_flag (FUTEX_WAKE, private), \
|
||||
(nr), 0); \
|
||||
__ret; \
|
||||
})
|
||||
|
||||
/* Returns non-zero if error happened, zero if success. */
|
||||
#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val, private) \
|
||||
({ \
|
||||
INTERNAL_SYSCALL_DECL (__err); \
|
||||
long int __ret; \
|
||||
__ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
|
||||
__lll_private_flag (FUTEX_CMP_REQUEUE, private),\
|
||||
(nr_wake), (nr_move), (mutex), (val)); \
|
||||
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, private) \
|
||||
({ \
|
||||
INTERNAL_SYSCALL_DECL (__err); \
|
||||
long int __ret; \
|
||||
__ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
|
||||
__lll_private_flag (FUTEX_WAKE_OP, private), \
|
||||
(nr_wake), (nr_wake2), (futexp2), \
|
||||
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
|
||||
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
|
||||
})
|
||||
|
||||
/* Priority Inheritance support. */
|
||||
#define lll_futex_wait_requeue_pi(futexp, val, mutex, private) \
|
||||
lll_futex_timed_wait_requeue_pi (futexp, val, NULL, 0, mutex, private)
|
||||
|
||||
#define lll_futex_timed_wait_requeue_pi(futexp, val, timespec, clockbit, \
|
||||
mutex, private) \
|
||||
({ \
|
||||
INTERNAL_SYSCALL_DECL (__err); \
|
||||
long int __ret; \
|
||||
int __op = FUTEX_WAIT_REQUEUE_PI | clockbit; \
|
||||
\
|
||||
__ret = INTERNAL_SYSCALL (futex, __err, 5, (futexp), \
|
||||
__lll_private_flag (__op, private), \
|
||||
(val), (timespec), mutex); \
|
||||
__ret; \
|
||||
})
|
||||
|
||||
#define lll_futex_cmp_requeue_pi(futexp, nr_wake, nr_move, mutex, val, priv) \
|
||||
({ \
|
||||
INTERNAL_SYSCALL_DECL (__err); \
|
||||
long int __ret; \
|
||||
__ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
|
||||
__lll_private_flag (FUTEX_CMP_REQUEUE_PI, priv),\
|
||||
(nr_wake), (nr_move), (mutex), (val)); \
|
||||
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
|
||||
})
|
||||
|
||||
#define lll_trylock(lock) \
|
||||
atomic_compare_and_exchange_val_acq (&(lock), 1, 0)
|
||||
|
||||
#define lll_cond_trylock(lock) \
|
||||
atomic_compare_and_exchange_val_acq (&(lock), 2, 0)
|
||||
|
||||
extern void __lll_lock_wait_private (int *futex) attribute_hidden;
|
||||
extern void __lll_lock_wait (int *futex, int private) attribute_hidden;
|
||||
extern int __lll_robust_lock_wait (int *futex, int private) attribute_hidden;
|
||||
|
||||
#define __lll_lock(futex, private) \
|
||||
((void) ({ \
|
||||
int *__futex = (futex); \
|
||||
if (__builtin_expect (atomic_compare_and_exchange_val_acq (__futex, \
|
||||
1, 0), 0)) \
|
||||
{ \
|
||||
if (__builtin_constant_p (private) && (private) == LLL_PRIVATE) \
|
||||
__lll_lock_wait_private (__futex); \
|
||||
else \
|
||||
__lll_lock_wait (__futex, private); \
|
||||
} \
|
||||
}))
|
||||
#define lll_lock(futex, private) __lll_lock (&(futex), private)
|
||||
|
||||
|
||||
#define __lll_robust_lock(futex, id, private) \
|
||||
({ \
|
||||
int *__futex = (futex); \
|
||||
int __val = 0; \
|
||||
\
|
||||
if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \
|
||||
0), 0)) \
|
||||
__val = __lll_robust_lock_wait (__futex, private); \
|
||||
__val; \
|
||||
})
|
||||
#define lll_robust_lock(futex, id, private) \
|
||||
__lll_robust_lock (&(futex), id, private)
|
||||
|
||||
|
||||
#define __lll_cond_lock(futex, private) \
|
||||
((void) ({ \
|
||||
int *__futex = (futex); \
|
||||
if (__builtin_expect (atomic_exchange_acq (__futex, 2), 0)) \
|
||||
__lll_lock_wait (__futex, private); \
|
||||
}))
|
||||
#define lll_cond_lock(futex, private) __lll_cond_lock (&(futex), private)
|
||||
|
||||
|
||||
#define lll_robust_cond_lock(futex, id, private) \
|
||||
__lll_robust_lock (&(futex), (id) | FUTEX_WAITERS, private)
|
||||
|
||||
|
||||
extern int __lll_timedlock_wait (int *futex, const struct timespec *,
|
||||
int private) attribute_hidden;
|
||||
extern int __lll_robust_timedlock_wait (int *futex, const struct timespec *,
|
||||
int private) attribute_hidden;
|
||||
|
||||
#define __lll_timedlock(futex, abstime, private) \
|
||||
({ \
|
||||
int *__futex = (futex); \
|
||||
int __val = 0; \
|
||||
\
|
||||
if (__builtin_expect (atomic_exchange_acq (__futex, 1), 0)) \
|
||||
__val = __lll_timedlock_wait (__futex, abstime, private); \
|
||||
__val; \
|
||||
})
|
||||
#define lll_timedlock(futex, abstime, private) \
|
||||
__lll_timedlock (&(futex), abstime, private)
|
||||
|
||||
|
||||
#define __lll_robust_timedlock(futex, abstime, id, private) \
|
||||
({ \
|
||||
int *__futex = (futex); \
|
||||
int __val = 0; \
|
||||
\
|
||||
if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \
|
||||
0), 0)) \
|
||||
__val = __lll_robust_timedlock_wait (__futex, abstime, private); \
|
||||
__val; \
|
||||
})
|
||||
#define lll_robust_timedlock(futex, abstime, id, private) \
|
||||
__lll_robust_timedlock (&(futex), abstime, id, private)
|
||||
|
||||
|
||||
#define __lll_unlock(futex, private) \
|
||||
(void) \
|
||||
({ int *__futex = (futex); \
|
||||
int __oldval = atomic_exchange_rel (__futex, 0); \
|
||||
if (__builtin_expect (__oldval > 1, 0)) \
|
||||
lll_futex_wake (__futex, 1, private); \
|
||||
})
|
||||
#define lll_unlock(futex, private) __lll_unlock(&(futex), private)
|
||||
|
||||
|
||||
#define __lll_robust_unlock(futex, private) \
|
||||
(void) \
|
||||
({ int *__futex = (futex); \
|
||||
int __oldval = atomic_exchange_rel (__futex, 0); \
|
||||
if (__builtin_expect (__oldval & FUTEX_WAITERS, 0)) \
|
||||
lll_futex_wake (__futex, 1, private); \
|
||||
})
|
||||
#define lll_robust_unlock(futex, private) \
|
||||
__lll_robust_unlock(&(futex), private)
|
||||
|
||||
|
||||
#define lll_islocked(futex) \
|
||||
(futex != 0)
|
||||
|
||||
|
||||
/* Our internal lock implementation is identical to the binary-compatible
|
||||
mutex implementation. */
|
||||
|
||||
/* Initializers for lock. */
|
||||
#define LLL_LOCK_INITIALIZER (0)
|
||||
#define LLL_LOCK_INITIALIZER_LOCKED (1)
|
||||
|
||||
/* The states of a lock are:
|
||||
0 - untaken
|
||||
1 - taken by one user
|
||||
>1 - taken by more users */
|
||||
|
||||
/* The kernel notifies a process which uses CLONE_CHILD_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. */
|
||||
#define lll_wait_tid(tid) \
|
||||
do { \
|
||||
__typeof (tid) __tid; \
|
||||
while ((__tid = (tid)) != 0) \
|
||||
lll_futex_wait (&(tid), __tid, LLL_SHARED); \
|
||||
} while (0)
|
||||
|
||||
extern int __lll_timedwait_tid (int *, const struct timespec *)
|
||||
attribute_hidden;
|
||||
|
||||
#define lll_timedwait_tid(tid, abstime) \
|
||||
({ \
|
||||
int __res = 0; \
|
||||
if ((tid) != 0) \
|
||||
__res = __lll_timedwait_tid (&(tid), (abstime)); \
|
||||
__res; \
|
||||
})
|
||||
|
||||
#endif /* lowlevellock.h */
|
||||
Loading…
Reference in New Issue
Block a user