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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: 2015-08-18 09:57:34 +0200 (Tue, 18 Aug 2015) $ by $Author: schulte $
11  * $Revision: 14653 $
12  *
13  * This file is part of Gecode, the generic constraint
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15  * http://www.gecode.org
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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  }
84 
86  Event::~Event(void) {
87  if (CloseHandle(w_h) == 0) {
88  std::cerr << "Operating system error: "
89  << "Event::~Event[Windows::CloseHandle]";
90  std::terminate();
91  }
92  }
93 
94 
95  /*
96  * Thread
97  */
98  forceinline void
99  Thread::sleep(unsigned int ms) {
100  Sleep(static_cast<DWORD>(ms));
101  }
102 
103  forceinline unsigned int
104  Thread::npu(void) {
105  SYSTEM_INFO si;
106  GetSystemInfo(&si);
107  return static_cast<unsigned int>(si.dwNumberOfProcessors);
108  }
109 
110 }}
111 
112 // STATISTICS: support-any
const SetInstr * si[]
Definition: mm-set.cpp:4340
static unsigned int npu(void)
Return number of processing units (1 if information not available)
Definition: none.hpp:80
Mutex(void)
Initialize mutex.
Definition: none.hpp:44
void acquire(void)
Acquire the mutex and possibly block.
Definition: none.hpp:46
void signal(void)
Signal the event.
Definition: none.hpp:63
void release(void)
Release the mutex.
Definition: none.hpp:52
static void sleep(unsigned int ms)
Put current thread to sleep for ms milliseconds.
Definition: none.hpp:78
bool tryacquire(void)
Try to acquire the mutex, return true if succesful.
Definition: none.hpp:48
~Event(void)
Delete event.
Definition: none.hpp:67
~Mutex(void)
Delete mutex.
Definition: none.hpp:54
Event(void)
Initialize event.
Definition: none.hpp:61
#define forceinline
Definition: config.hpp:173
Gecode toplevel namespace
void wait(void)
Wait until the event becomes signalled.
Definition: none.hpp:65