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m68k: add support for PI futexes

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This commit is contained in:
Andreas Schwab 2013-12-04 01:41:08 +01:00
parent 2ea2960024
commit e1c5c75ea2
2 changed files with 34 additions and 0 deletions
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5
ports/ChangeLog.m68k
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@ -1,5 +1,10 @@
2013-12-10 Andreas Schwab <schwab@linux-m68k.org>
* sysdeps/unix/sysv/linux/m68k/nptl/lowlevellock.h
(FUTEX_WAIT_REQEUE_PI, FUTEX_CMP_REQEUE_PI)
(lll_futex_wait_requeue_pi, lll_futex_timed_wait_requeue_pi)
(lll_futex_cmp_requeue_pi): Define.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_REQUEUE_PI, __ASSUME_SET_ROBUST_LIST): Undefine before
3.10.

29
ports/sysdeps/unix/sysv/linux/m68k/nptl/lowlevellock.h
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@ -38,6 +38,8 @@
#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
@ -142,6 +144,33 @@
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)