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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  * This file is part of Gecode, the generic constraint
10  * development environment:
11  * http://www.gecode.org
12  *
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33 
34 namespace Gecode { namespace Support {
35 
36  /*
37  * Mutex
38  */
40  Mutex::Mutex(void) {
41  InitializeCriticalSection(&w_cs);
42  }
43  forceinline void
44  Mutex::acquire(void) {
45  EnterCriticalSection(&w_cs);
46  }
47  forceinline bool
48  Mutex::tryacquire(void) {
49  return TryEnterCriticalSection(&w_cs) != 0;
50  }
51  forceinline void
52  Mutex::release(void) {
53  LeaveCriticalSection(&w_cs);
54  }
56  Mutex::~Mutex(void) {
57  DeleteCriticalSection(&w_cs);
58  }
59 
60 
61  /*
62  * Event
63  */
65  Event::Event(void)
66  : w_h(CreateEvent(NULL, FALSE, FALSE, NULL)) {
67  if (w_h == NULL)
68  throw OperatingSystemError("Event::Event[Windows::CreateEvent]");
69  }
70  forceinline void
71  Event::signal(void) {
72  if (SetEvent(w_h) == 0)
73  throw OperatingSystemError("Event::signal[Windows::SetEvent]");
74  }
75  forceinline void
76  Event::wait(void) {
77  if (WaitForSingleObject(w_h,INFINITE) != 0)
78  throw OperatingSystemError("Event::wait[Windows::WaitForSingleObject]");
79  }
80 
82  Event::~Event(void) {
83  if (CloseHandle(w_h) == 0) {
84  std::cerr << "Operating system error: "
85  << "Event::~Event[Windows::CloseHandle]";
86  std::terminate();
87  }
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
void acquire(void)
Acquire the mutex and possibly block.
Definition: none.hpp:42
Event(void)
Initialize event.
Definition: none.hpp:57
Gecode toplevel namespace
~Event(void)
Delete event.
Definition: none.hpp:63
Mutex(void)
Initialize mutex.
Definition: none.hpp:40
bool tryacquire(void)
Try to acquire the mutex, return true if succesful.
Definition: none.hpp:44
~Mutex(void)
Delete mutex.
Definition: none.hpp:50
const SetInstr * si[]
Definition: mm-set.cpp:4341
void signal(void)
Signal the event.
Definition: none.hpp:59
static void sleep(unsigned int ms)
Put current thread to sleep for ms milliseconds.
Definition: none.hpp:74
#define forceinline
Definition: config.hpp:192
void release(void)
Release the mutex.
Definition: none.hpp:48
void wait(void)
Wait until the event becomes signalled.
Definition: none.hpp:61
static unsigned int npu(void)
Return number of processing units (1 if information not available)
Definition: none.hpp:76