The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_futex.h

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    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 
   55 #define LINUX_FUTEX_PRIVATE_FLAG        128
   56 #define LINUX_FUTEX_CLOCK_REALTIME      256
   57 
   58 #define FUTEX_OP_SET            0       /* *(int *)UADDR2 = OPARG; */
   59 #define FUTEX_OP_ADD            1       /* *(int *)UADDR2 += OPARG; */
   60 #define FUTEX_OP_OR             2       /* *(int *)UADDR2 |= OPARG; */
   61 #define FUTEX_OP_ANDN           3       /* *(int *)UADDR2 &= ~OPARG; */
   62 #define FUTEX_OP_XOR            4       /* *(int *)UADDR2 ^= OPARG; */
   63 
   64 #define FUTEX_OP_OPARG_SHIFT    8       /* Use (1 << OPARG) instead of OPARG.  */
   65 
   66 #define FUTEX_OP_CMP_EQ         0       /* if (oldval == CMPARG) wake */
   67 #define FUTEX_OP_CMP_NE         1       /* if (oldval != CMPARG) wake */
   68 #define FUTEX_OP_CMP_LT         2       /* if (oldval < CMPARG) wake */
   69 #define FUTEX_OP_CMP_LE         3       /* if (oldval <= CMPARG) wake */
   70 #define FUTEX_OP_CMP_GT         4       /* if (oldval > CMPARG) wake */
   71 #define FUTEX_OP_CMP_GE         5       /* if (oldval >= CMPARG) wake */
   72 
   73 #define FUTEX_WAITERS           0x80000000
   74 #define FUTEX_OWNER_DIED        0x40000000
   75 #define FUTEX_TID_MASK          0x3fffffff
   76 #define FUTEX_BITSET_MATCH_ANY  0xffffffff
   77 
   78 int futex_xchgl(int oparg, uint32_t *uaddr, int *oldval);
   79 int futex_addl(int oparg, uint32_t *uaddr, int *oldval);
   80 int futex_orl(int oparg, uint32_t *uaddr, int *oldval);
   81 int futex_andl(int oparg, uint32_t *uaddr, int *oldval);
   82 int futex_xorl(int oparg, uint32_t *uaddr, int *oldval);
   83 void    release_futexes(struct thread *,
   84                         struct linux_emuldata *);
   85 
   86 #endif  /* !_LINUX_FUTEX_H */

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