Alexandria  2.27.0
SDC-CH common library for the Euclid project
Semaphore.h
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2012-2021 Euclid Science Ground Segment
3  *
4  * This library is free software; you can redistribute it and/or modify it under
5  * the terms of the GNU Lesser General Public License as published by the Free
6  * Software Foundation; either version 3.0 of the License, or (at your option)
7  * any later version.
8  *
9  * This library is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11  * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12  * details.
13  *
14  * You should have received a copy of the GNU Lesser General Public License
15  * along with this library; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #ifndef _ALEXANDRIAKERNEL_SEMAPHORE_H
20 #define _ALEXANDRIAKERNEL_SEMAPHORE_H
21 
22 #include <chrono>
23 #include <memory>
24 
25 namespace Euclid {
26 
31 class Semaphore {
32 public:
38  explicit Semaphore(unsigned int i);
39 
44 
48  void release();
49 
53  void acquire();
54 
59  bool try_acquire();
60 
69  bool try_acquire_until(const std::chrono::system_clock::time_point& abs_time);
70 
79  template <class Clock, class Duration>
81  return try_acquire_until(std::chrono::system_clock::now() + (Clock::now() - abs_time));
82  }
83 
93  template <class Rep, class Ratio>
96  }
97 
98 private:
99  class SemaphoreImpl;
101 };
102 
103 } // namespace Euclid
104 
105 #endif // _ALEXANDRIAKERNEL_SEMAPHORE_H
Semaphore(unsigned int i)
Definition: Semaphore.cpp:28
bool try_acquire_until(const std::chrono::time_point< Clock, Duration > &abs_time)
Definition: Semaphore.h:80
bool try_acquire_for(const std::chrono::duration< Rep, Ratio > &rel_time)
Definition: Semaphore.h:94
bool try_acquire_until(const std::chrono::system_clock::time_point &abs_time)
Definition: Semaphore.cpp:44
std::unique_ptr< SemaphoreImpl > m_impl
Definition: Semaphore.h:99