/usr/include/OpenThreads/Block is in libopenthreads-dev 3.2.3+dfsg1-2+b4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | /* -*-c++-*- OpenThreads - Copyright (C) 1998-2007 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef _OPENTHREADS_BLOCK_
#define _OPENTHREADS_BLOCK_
#include <OpenThreads/Thread>
#include <OpenThreads/Barrier>
#include <OpenThreads/Condition>
#include <OpenThreads/ScopedLock>
namespace OpenThreads {
/** Block is a block that can be used to halt a thread that is waiting another thread to release it.*/
class Block
{
public:
Block():
_released(false) {}
~Block()
{
release();
}
inline bool block()
{
ScopedLock<OpenThreads::Mutex> mutlock(_mut);
if( !_released )
{
return _cond.wait(&_mut)==0;
}
else
{
return true;
}
}
inline bool block(unsigned long timeout)
{
ScopedLock<OpenThreads::Mutex> mutlock(_mut);
if( !_released )
{
return _cond.wait(&_mut, timeout)==0;
}
else
{
return true;
}
}
inline void release()
{
ScopedLock<OpenThreads::Mutex> mutlock(_mut);
if (!_released)
{
_released = true;
_cond.broadcast();
}
}
inline void reset()
{
ScopedLock<OpenThreads::Mutex> mutlock(_mut);
_released = false;
}
inline void set(bool doRelease)
{
if (doRelease!=_released)
{
if (doRelease) release();
else reset();
}
}
protected:
Mutex _mut;
Condition _cond;
bool _released;
private:
Block(const Block&) {}
};
/** BlockCount is a block that can be used to halt a thread that is waiting for a specified number of operations to be completed.*/
class BlockCount
{
public:
BlockCount(unsigned int blockCount):
_blockCount(blockCount),
_currentCount(0) {}
~BlockCount()
{
_blockCount = 0;
release();
}
inline void completed()
{
OpenThreads::ScopedLock<OpenThreads::Mutex> mutlock(_mut);
if (_currentCount>0)
{
--_currentCount;
if (_currentCount==0)
{
// osg::notify(osg::NOTICE)<<"Released"<<std::endl;
_cond.broadcast();
}
}
}
inline void block()
{
OpenThreads::ScopedLock<OpenThreads::Mutex> mutlock(_mut);
if (_currentCount)
_cond.wait(&_mut);
}
inline void reset()
{
OpenThreads::ScopedLock<OpenThreads::Mutex> mutlock(_mut);
if (_currentCount!=_blockCount)
{
if (_blockCount==0) _cond.broadcast();
_currentCount = _blockCount;
}
}
inline void release()
{
OpenThreads::ScopedLock<OpenThreads::Mutex> mutlock(_mut);
if (_currentCount)
{
_currentCount = 0;
_cond.broadcast();
}
}
inline void setBlockCount(unsigned int blockCount) { _blockCount = blockCount; }
inline unsigned int getBlockCount() const { return _blockCount; }
inline unsigned int getCurrentCount() const { return _currentCount; }
protected:
OpenThreads::Mutex _mut;
OpenThreads::Condition _cond;
unsigned int _blockCount;
unsigned int _currentCount;
private:
BlockCount(const BlockCount&) {}
};
}
#endif
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