Mir
cross_process_sync.h
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1 /*
2  * Copyright © 2013 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License version 2 or 3,
6  * as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored by: Thomas Voss <thomas.voss@canonical.com>
17  */
18 
19 #ifndef MIR_TEST_CROSS_PROCESS_SYNC_H_
20 #define MIR_TEST_CROSS_PROCESS_SYNC_H_
21 
22 #include <chrono>
23 
24 namespace mir
25 {
26 namespace test
27 {
28 // A cross-process synchronization primitive that supports simple
29 // wait-condition-like scenarios.
31 {
32  public:
35  ~CrossProcessSync() noexcept;
36 
38 
39  // Try to signal the other side that we are ready for at most duration milliseconds.
40  // Throws a std::runtime_error if not successful.
41  void try_signal_ready_for(const std::chrono::milliseconds& duration);
42 
43  void try_signal_ready_for();
44 
45  // Wait for the other sides to signal readiness for at most duration milliseconds.
46  // Returns the number of ready signals that have been collected since creation.
47  // Throws std::runtime_error if not successful.
48  unsigned int wait_for_signal_ready_for(const std::chrono::milliseconds& duration);
49  unsigned int wait_for_signal_ready_for();
50 
51  void signal_ready();
52  unsigned int wait_for_signal_ready();
53 
54  private:
55  int fds[2];
56  unsigned int counter;
57 };
58 }
59 }
60 
61 #endif // MIR_TEST_CROSS_PROCESS_SYNC_H_
AutoUnblockThread is a helper thread class that can gracefully shutdown at destruction time...
Definition: sw_splash.h:26
CrossProcessSync & operator=(const CrossProcessSync &rhs)
unsigned int wait_for_signal_ready_for()
Definition: cross_process_sync.h:30
unsigned int wait_for_signal_ready()

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