1 /* $NetBSD: linux_futex.h,v 1.2 2005/12/11 12:20:19 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-4-Clause 5 * 6 * Copyright (c) 2005 Emmanuel Dreyfus, all rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Emmanuel Dreyfus 19 * 4. The name of the author may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 25 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 * 35 * $FreeBSD$ 36 */ 37 38 #ifndef _LINUX_FUTEX_H 39 #define _LINUX_FUTEX_H 40 41 #define LINUX_FUTEX_WAIT 0 42 #define LINUX_FUTEX_WAKE 1 43 #define LINUX_FUTEX_FD 2 /* unused */ 44 #define LINUX_FUTEX_REQUEUE 3 45 #define LINUX_FUTEX_CMP_REQUEUE 4 46 #define LINUX_FUTEX_WAKE_OP 5 47 #define LINUX_FUTEX_LOCK_PI 6 48 #define LINUX_FUTEX_UNLOCK_PI 7 49 #define LINUX_FUTEX_TRYLOCK_PI 8 50 #define LINUX_FUTEX_WAIT_BITSET 9 51 #define LINUX_FUTEX_WAKE_BITSET 10 52 #define LINUX_FUTEX_WAIT_REQUEUE_PI 11 53 #define LINUX_FUTEX_CMP_REQUEUE_PI 12 54 #define LINUX_FUTEX_LOCK_PI2 13 55 56 #define LINUX_FUTEX_PRIVATE_FLAG 128 57 #define LINUX_FUTEX_CLOCK_REALTIME 256 58 59 #define LINUX_FUTEX_CMD_MASK ~(LINUX_FUTEX_PRIVATE_FLAG | \ 60 LINUX_FUTEX_CLOCK_REALTIME) 61 62 #define FUTEX_OP_SET 0 /* *(int *)UADDR2 = OPARG; */ 63 #define FUTEX_OP_ADD 1 /* *(int *)UADDR2 += OPARG; */ 64 #define FUTEX_OP_OR 2 /* *(int *)UADDR2 |= OPARG; */ 65 #define FUTEX_OP_ANDN 3 /* *(int *)UADDR2 &= ~OPARG; */ 66 #define FUTEX_OP_XOR 4 /* *(int *)UADDR2 ^= OPARG; */ 67 68 #define FUTEX_OP_OPARG_SHIFT 8 /* Use (1 << OPARG) instead of OPARG. */ 69 70 #define FUTEX_OP_CMP_EQ 0 /* if (oldval == CMPARG) wake */ 71 #define FUTEX_OP_CMP_NE 1 /* if (oldval != CMPARG) wake */ 72 #define FUTEX_OP_CMP_LT 2 /* if (oldval < CMPARG) wake */ 73 #define FUTEX_OP_CMP_LE 3 /* if (oldval <= CMPARG) wake */ 74 #define FUTEX_OP_CMP_GT 4 /* if (oldval > CMPARG) wake */ 75 #define FUTEX_OP_CMP_GE 5 /* if (oldval >= CMPARG) wake */ 76 77 #define FUTEX_WAITERS 0x80000000 78 #define FUTEX_OWNER_DIED 0x40000000 79 #define FUTEX_TID_MASK 0x3fffffff 80 #define FUTEX_BITSET_MATCH_ANY 0xffffffff 81 82 int futex_xchgl(int oparg, uint32_t *uaddr, int *oldval); 83 int futex_addl(int oparg, uint32_t *uaddr, int *oldval); 84 int futex_orl(int oparg, uint32_t *uaddr, int *oldval); 85 int futex_andl(int oparg, uint32_t *uaddr, int *oldval); 86 int futex_xorl(int oparg, uint32_t *uaddr, int *oldval); 87 int futex_wake(struct thread *td, uint32_t *uaddr, int val, bool shared); 88 void release_futexes(struct thread *, 89 struct linux_emuldata *); 90 91 #endif /* !_LINUX_FUTEX_H */ 92