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59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _FUTEX_H
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#define _FUTEX_H
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#include <asm/futex.h>
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/*
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* Futex flags used to encode options to functions and preserve them across
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* restarts.
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*/
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#ifdef CONFIG_MMU
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# define FLAGS_SHARED 0x01
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#else
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/*
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* NOMMU does not have per process address space. Let the compiler optimize
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* code away.
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*/
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# define FLAGS_SHARED 0x00
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#endif
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#define FLAGS_CLOCKRT 0x02
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#define FLAGS_HAS_TIMEOUT 0x04
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#ifdef CONFIG_HAVE_FUTEX_CMPXCHG
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#define futex_cmpxchg_enabled 1
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#else
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extern int __read_mostly futex_cmpxchg_enabled;
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#endif
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#ifdef CONFIG_FAIL_FUTEX
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extern bool should_fail_futex(bool fshared);
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#else
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static inline bool should_fail_futex(bool fshared)
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{
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return false;
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}
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#endif
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extern int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, u32
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val, ktime_t *abs_time, u32 bitset, u32 __user
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*uaddr2);
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extern int futex_requeue(u32 __user *uaddr1, unsigned int flags,
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u32 __user *uaddr2, int nr_wake, int nr_requeue,
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u32 *cmpval, int requeue_pi);
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extern int futex_wait(u32 __user *uaddr, unsigned int flags, u32 val,
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ktime_t *abs_time, u32 bitset);
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extern int futex_wake(u32 __user *uaddr, unsigned int flags, int nr_wake, u32 bitset);
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extern int futex_wake_op(u32 __user *uaddr1, unsigned int flags,
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u32 __user *uaddr2, int nr_wake, int nr_wake2, int op);
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extern int futex_unlock_pi(u32 __user *uaddr, unsigned int flags);
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extern int futex_lock_pi(u32 __user *uaddr, unsigned int flags, ktime_t *time, int trylock);
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#endif /* _FUTEX_H */
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