source: mainline/kernel/generic/include/synch/futex.h@ a53ed3a

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since a53ed3a was b7fd2a0, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 7 years ago

Use errno_t in all uspace and kernel code.

Change type of every variable, parameter and return value that holds an
<errno.h> constant to either errno_t (the usual case), or sys_errno_t
(some places in kernel). This is for the purpose of self-documentation,
as well as for type-checking with a bit of type definition hackery.

Although this is a massive commit, it is a simple text replacement, and thus
is very easy to verify. Simply do the following:

`
git checkout <this commit's hash>
git reset HEAD
git add .
tools/srepl '\berrno_t\b' int
git add .
tools/srepl '\bsys_errno_t\b' sysarg_t
git reset
git diff
`

While this doesn't ensure that the replacements are correct, it does ensure
that the commit doesn't do anything except those replacements. Since errno_t
is typedef'd to int in the usual case (and sys_errno_t to sysarg_t), even if
incorrect, this commit cannot change behavior.
  • Property mode set to 100644
File size: 2.2 KB
RevLine 
[9aa72b4]1/*
[df4ed85]2 * Copyright (c) 2006 Jakub Jermar
[9aa72b4]3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
[7f1c620]29/** @addtogroup sync
[b45c443]30 * @{
31 */
32/** @file
33 */
34
[06e1e95]35#ifndef KERN_FUTEX_H_
36#define KERN_FUTEX_H_
[9aa72b4]37
[d99c1d2]38#include <typedefs.h>
[9aa72b4]39#include <synch/waitq.h>
[82cbf8c6]40#include <adt/hash_table.h>
[9aa72b4]41
42/** Kernel-side futex structure. */
[e71a61d]43typedef struct {
[80bcaed]44 /** Physical address of the status variable. */
45 uintptr_t paddr;
46 /** Wait queue for threads waiting for futex availability. */
47 waitq_t wq;
48 /** Futex hash table link. */
[82cbf8c6]49 ht_link_t ht_link;
[80bcaed]50 /** Number of tasks that reference this futex. */
[98000fb]51 size_t refcount;
[e71a61d]52} futex_t;
[9aa72b4]53
54extern void futex_init(void);
[b7fd2a0]55extern sys_errno_t sys_futex_sleep(uintptr_t);
56extern sys_errno_t sys_futex_wakeup(uintptr_t);
[9aa72b4]57
[669f3d32]58extern void futex_task_cleanup(void);
59extern void futex_task_init(struct task *);
60extern void futex_task_deinit(struct task *);
[e090e1bc]61
[9aa72b4]62#endif
[b45c443]63
[7f1c620]64/** @}
[b45c443]65 */
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