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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: 2009-10-12 20:40:58 +0200 (Mon, 12 Oct 2009) $ by $Author: schulte $
11  * $Revision: 9882 $
12  *
13  * This file is part of Gecode, the generic constraint
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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  }
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
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:132
Gecode toplevel namespace
void wait(void)
Wait until the event becomes signalled.
Definition: none.hpp:65