1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Futex2 library addons for futex tests 4 * 5 * Copyright 2021 Collabora Ltd. 6 */ 7 #include <stdint.h> 8 9 #define u64_to_ptr(x) ((void *)(uintptr_t)(x)) 10 11 #ifndef __NR_futex_waitv 12 #define __NR_futex_waitv 449 13 struct futex_waitv { 14 __u64 val; 15 __u64 uaddr; 16 __u32 flags; 17 __u32 __reserved; 18 }; 19 #endif 20 21 #ifndef __NR_futex_wake 22 #define __NR_futex_wake 454 23 #endif 24 25 #ifndef __NR_futex_wait 26 #define __NR_futex_wait 455 27 #endif 28 29 #ifndef FUTEX2_SIZE_U32 30 #define FUTEX2_SIZE_U32 0x02 31 #endif 32 33 #ifndef FUTEX2_NUMA 34 #define FUTEX2_NUMA 0x04 35 #endif 36 37 #ifndef FUTEX2_MPOL 38 #define FUTEX2_MPOL 0x08 39 #endif 40 41 #ifndef FUTEX2_PRIVATE 42 #define FUTEX2_PRIVATE FUTEX_PRIVATE_FLAG 43 #endif 44 45 #ifndef FUTEX2_NO_NODE 46 #define FUTEX_NO_NODE (-1) 47 #endif 48 49 #ifndef FUTEX_32 50 #define FUTEX_32 FUTEX2_SIZE_U32 51 #endif 52 53 struct futex32_numa { 54 futex_t futex; 55 futex_t numa; 56 }; 57 58 /** 59 * futex_waitv - Wait at multiple futexes, wake on any 60 * @waiters: Array of waiters 61 * @nr_waiters: Length of waiters array 62 * @flags: Operation flags 63 * @timo: Optional timeout for operation 64 */ 65 static inline int futex_waitv(volatile struct futex_waitv *waiters, unsigned long nr_waiters, 66 unsigned long flags, struct timespec *timo, clockid_t clockid) 67 { 68 return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, timo, clockid); 69 } 70 71 /* 72 * futex_wait() - block on uaddr with optional timeout 73 * @val: Expected value 74 * @flags: FUTEX2 flags 75 * @timeout: Relative timeout 76 * @clockid: Clock id for the timeout 77 */ 78 static inline int futex2_wait(void *uaddr, long val, unsigned int flags, 79 struct timespec *timeout, clockid_t clockid) 80 { 81 return syscall(__NR_futex_wait, uaddr, val, ~0U, flags, timeout, clockid); 82 } 83 84 /* 85 * futex2_wake() - Wake a number of futexes 86 * @nr: Number of threads to wake at most 87 * @flags: FUTEX2 flags 88 */ 89 static inline int futex2_wake(void *uaddr, int nr, unsigned int flags) 90 { 91 return syscall(__NR_futex_wake, uaddr, ~0U, nr, flags); 92 } 93