source: mainline/kernel/generic/include/synch/semaphore.h@ aadde10

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since aadde10 was b7fd2a0, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 8 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: 2.3 KB
RevLine 
[f761f1eb]1/*
[df4ed85]2 * Copyright (c) 2001-2004 Jakub Jermar
[f761f1eb]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
[06e1e95]29/** @addtogroup sync
[b45c443]30 * @{
31 */
32/** @file
33 */
34
[06e1e95]35#ifndef KERN_SEMAPHORE_H_
36#define KERN_SEMAPHORE_H_
[f761f1eb]37
[897fd8f1]38#include <errno.h>
[83dab11]39#include <stdint.h>
[f761f1eb]40#include <synch/waitq.h>
[c0699467]41#include <abi/synch.h>
[f761f1eb]42
[e71a61d]43typedef struct {
[76cec1e]44 waitq_t wq;
[e71a61d]45} semaphore_t;
[f761f1eb]46
47#define semaphore_down(s) \
[b3f8fb7]48 _semaphore_down_timeout((s), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE)
[da1bafb]49
[f761f1eb]50#define semaphore_trydown(s) \
[80bcaed]51 _semaphore_down_timeout((s), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NON_BLOCKING)
[da1bafb]52
[b3f8fb7]53#define semaphore_down_timeout(s, usec) \
54 _semaphore_down_timeout((s), (usec), SYNCH_FLAGS_NONE)
[f761f1eb]55
[181a746]56#define semaphore_down_interruptable(s) \
[897fd8f1]57 (_semaphore_down_timeout((s), SYNCH_NO_TIMEOUT, \
58 SYNCH_FLAGS_INTERRUPTIBLE) != EINTR)
[181a746]59
[da1bafb]60extern void semaphore_initialize(semaphore_t *, int);
[b7fd2a0]61extern errno_t _semaphore_down_timeout(semaphore_t *, uint32_t, unsigned int);
[da1bafb]62extern void semaphore_up(semaphore_t *);
[5df7928]63extern int semaphore_count_get(semaphore_t *);
[f761f1eb]64
65#endif
[116d1ef4]66
[06e1e95]67/** @}
[b45c443]68 */
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