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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Futex2 library addons for futex tests
*
* Copyright 2021 Collabora Ltd.
*/
#include <stdint.h>
#define u64_to_ptr(x) ((void *)(uintptr_t)(x))
#ifndef __NR_futex_waitv
#define __NR_futex_waitv 449
struct futex_waitv {
__u64 val;
__u64 uaddr;
__u32 flags;
__u32 __reserved;
};
#endif
#ifndef __NR_futex_wake
#define __NR_futex_wake 454
#endif
#ifndef __NR_futex_wait
#define __NR_futex_wait 455
#endif
#ifndef FUTEX2_SIZE_U32
#define FUTEX2_SIZE_U32 0x02
#endif
#ifndef FUTEX2_NUMA
#define FUTEX2_NUMA 0x04
#endif
#ifndef FUTEX2_MPOL
#define FUTEX2_MPOL 0x08
#endif
#ifndef FUTEX2_PRIVATE
#define FUTEX2_PRIVATE FUTEX_PRIVATE_FLAG
#endif
#ifndef FUTEX2_NO_NODE
#define FUTEX_NO_NODE (-1)
#endif
#ifndef FUTEX_32
#define FUTEX_32 FUTEX2_SIZE_U32
#endif
struct futex32_numa {
futex_t futex;
futex_t numa;
};
/**
* futex_waitv - Wait at multiple futexes, wake on any
* @waiters: Array of waiters
* @nr_waiters: Length of waiters array
* @flags: Operation flags
* @timo: Optional timeout for operation
*/
static inline int futex_waitv(volatile struct futex_waitv *waiters, unsigned long nr_waiters,
unsigned long flags, struct timespec *timo, clockid_t clockid)
{
return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, timo, clockid);
}
/*
* futex_wait() - block on uaddr with optional timeout
* @val: Expected value
* @flags: FUTEX2 flags
* @timeout: Relative timeout
* @clockid: Clock id for the timeout
*/
static inline int futex2_wait(void *uaddr, long val, unsigned int flags,
struct timespec *timeout, clockid_t clockid)
{
return syscall(__NR_futex_wait, uaddr, val, ~0U, flags, timeout, clockid);
}
/*
* futex2_wake() - Wake a number of futexes
* @nr: Number of threads to wake at most
* @flags: FUTEX2 flags
*/
static inline int futex2_wake(void *uaddr, int nr, unsigned int flags)
{
return syscall(__NR_futex_wake, uaddr, ~0U, nr, flags);
}
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