blob: c11e8dd1057cff6583417efdd43e1d8c69961b3e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* semaphore.h - General-purpose counting semaphore
*/
#pragma once
#include <libcamera/base/private.h>
#include <libcamera/base/mutex.h>
namespace libcamera {
class Semaphore
{
public:
Semaphore(unsigned int n = 0);
unsigned int available();
void acquire(unsigned int n = 1);
bool tryAcquire(unsigned int n = 1);
void release(unsigned int n = 1);
private:
Mutex mutex_;
ConditionVariable cv_;
unsigned int available_;
};
} /* namespace libcamera */
|