68 lines
2.8 KiB
C++
68 lines
2.8 KiB
C++
/*=============================================================================
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Copyright (C) 2012 Allied Vision Technologies. All Rights Reserved.
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Redistribution of this file, in original or modified form, without
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prior written consent of Allied Vision Technologies is prohibited.
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-------------------------------------------------------------------------------
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File: ConditionHelper.h
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Description: Definition of helper class for conditions.
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Intended for use in the implementation of Vimba CPP API.
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-------------------------------------------------------------------------------
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF TITLE,
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NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=============================================================================*/
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#ifndef AVT_VMBAPI_CONDITIONHELPER_H
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#define AVT_VMBAPI_CONDITIONHELPER_H
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#include <VimbaCPP/Source/Condition.h>
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#include <map>
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namespace AVT {
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namespace VmbAPI {
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class ConditionHelper
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{
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public:
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ConditionHelper();
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// Waits until writing access has finished and returns true.
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// If exclusive writing access was granted the function exits immediately without locking and returns false
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bool EnterReadLock( BasicLockable &rLockable );
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bool EnterReadLock( MutexPtr &pMutex );
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void ExitReadLock( BasicLockable &rLockable );
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void ExitReadLock( MutexPtr &pMutex );
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// Waits until writing and reading access have finished and returns true.
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// If exclusive writing access was granted the function exits immediately without locking and returns false
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bool EnterWriteLock( BasicLockable &rLockable, bool bExclusive = false );
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bool EnterWriteLock( MutexPtr &pMutex, bool bExclusive = false );
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void ExitWriteLock( BasicLockable &rLockable );
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void ExitWriteLock( MutexPtr &pMutex );
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private:
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Condition m_ReadCondition;
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Condition m_WriteCondition;
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bool m_bIsWritingList;
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bool m_bExclusive;
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int m_nNumListReads;
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};
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}} // namespace AVT::VmbAPI
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#endif // CONDITIONHELPER_H
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