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windows.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2009
8  *
9  * Last modified:
10  * $Date: 2009-10-13 05:40:58 +1100 (Tue, 13 Oct 2009) $ by $Author: schulte $
11  * $Revision: 9882 $
12  *
13  * This file is part of Gecode, the generic constraint
14  * development environment:
15  * http://www.gecode.org
16  *
17  * Permission is hereby granted, free of charge, to any person obtaining
18  * a copy of this software and associated documentation files (the
19  * "Software"), to deal in the Software without restriction, including
20  * without limitation the rights to use, copy, modify, merge, publish,
21  * distribute, sublicense, and/or sell copies of the Software, and to
22  * permit persons to whom the Software is furnished to do so, subject to
23  * the following conditions:
24  *
25  * The above copyright notice and this permission notice shall be
26  * included in all copies or substantial portions of the Software.
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28  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
29  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
30  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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34  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35  *
36  */
37 
38 namespace Gecode { namespace Support {
39 
40  /*
41  * Mutex
42  */
44  Mutex::Mutex(void) {
45  InitializeCriticalSection(&w_cs);
46  }
47  forceinline void
48  Mutex::acquire(void) {
49  EnterCriticalSection(&w_cs);
50  }
51  forceinline bool
52  Mutex::tryacquire(void) {
53  return TryEnterCriticalSection(&w_cs) != 0;
54  }
55  forceinline void
56  Mutex::release(void) {
57  LeaveCriticalSection(&w_cs);
58  }
60  Mutex::~Mutex(void) {
61  DeleteCriticalSection(&w_cs);
62  }
63 
64 
65  /*
66  * Event
67  */
69  Event::Event(void)
70  : w_h(CreateEvent(NULL, FALSE, FALSE, NULL)) {
71  if (w_h == NULL)
72  throw OperatingSystemError("Event::Event[Windows::CreateEvent]");
73  }
74  forceinline void
75  Event::signal(void) {
76  if (SetEvent(w_h) == 0)
77  throw OperatingSystemError("Event::signal[Windows::SetEvent]");
78  }
79  forceinline void
80  Event::wait(void) {
81  if (WaitForSingleObject(w_h,INFINITE) != 0)
82  throw OperatingSystemError("Event::wait[Windows::WaitForSingleObject]");
83  }
85  Event::~Event(void) {
86  if (CloseHandle(w_h) == 0)
87  throw OperatingSystemError("Event::~Event[Windows::CloseHandle]");
88  }
89 
90 
91  /*
92  * Thread
93  */
94  forceinline void
95  Thread::sleep(unsigned int ms) {
96  Sleep(static_cast<DWORD>(ms));
97  }
98 
99  forceinline unsigned int
100  Thread::npu(void) {
101  SYSTEM_INFO si;
102  GetSystemInfo(&si);
103  return static_cast<unsigned int>(si.dwNumberOfProcessors);
104  }
105 
106 }}
107 
108 // STATISTICS: support-any