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Last change
on this file since 039e15 was 039e15, checked in by Frederik Heber <heber@…>, 9 years ago |
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Added AtomicInstance as a mutex-locked wrapper around a given entity.
- this should help in multi-threaded codes to prevent accessing the entity from
more than one thread at once: Lock the entity by accessing it within a scope
while wrapped in AtomicInstance.
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-
Property mode
set to
100644
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File size:
1.6 KB
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| 1 | /*
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| 2 | * AtomicInstance_impl.hpp
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| 3 | *
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| 4 | * Created on: Apr 26, 2016
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| 5 | * Author: heber
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| 6 | */
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| 7 |
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| 8 |
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| 9 | #ifndef ATOMICINSTANCE_IMPL_HPP_
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| 10 | #define ATOMICINSTANCE_IMPL_HPP_
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| 11 |
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| 12 | // include config.h
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| 13 | #ifdef HAVE_CONFIG_H
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| 14 | #include <config.h>
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| 15 | #endif
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| 16 |
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| 17 | #include "CodePatterns/Assert.hpp"
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| 18 |
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| 19 | #include "AtomicInstance.hpp"
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| 20 |
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| 21 | template<class T> boost::mutex AtomicInstance< T >::atomicLock;
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| 22 |
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| 23 | template <class T>
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| 24 | AtomicInstance<T>::AtomicInstance(T* _content) :
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| 25 | content(_content)
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| 26 | {
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| 27 | if (content != NULL)
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| 28 | AtomicInstance<T>::atomicLock.lock();
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| 29 | }
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| 30 |
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| 31 | template <class T>
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| 32 | AtomicInstance<T>::AtomicInstance() :
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| 33 | content(NULL)
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| 34 | {
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| 35 | }
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| 36 |
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| 37 | template <class T>
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| 38 | AtomicInstance<T>::~AtomicInstance()
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| 39 | {
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| 40 | if (content != NULL)
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| 41 | AtomicInstance<T>::atomicLock.unlock();
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| 42 | }
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| 43 |
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| 44 | template <class T>
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| 45 | T& AtomicInstance<T>::operator*()
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| 46 | { return *content;}
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| 47 |
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| 48 | template <class T>
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| 49 | const T& AtomicInstance<T>::operator*() const
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| 50 | { return *content;}
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| 51 |
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| 52 | template <class T>
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| 53 | AtomicInstance<T>& AtomicInstance<T>::operator=(const AtomicInstance<T>& rhs)
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| 54 | {
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| 55 | if (this != &rhs) {
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| 56 | this->content = rhs.content;
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| 57 | const_cast<AtomicInstance<T>&>(rhs).content = NULL;
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| 58 | }
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| 59 | return *this;
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| 60 | }
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| 61 |
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| 62 | template <class T>
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| 63 | AtomicInstance<T>::AtomicInstance(AtomicInstance<T>& rhs) :
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| 64 | content(rhs.content)
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| 65 | {
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| 66 | // check for self-copy
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| 67 | if (this != &rhs)
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| 68 | rhs.content = NULL;
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| 69 | }
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| 70 |
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| 71 | template <class T>
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| 72 | AtomicInstance<T>::AtomicInstance(const AtomicInstance<T>& rhs) :
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| 73 | content(rhs.content)
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| 74 | {
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| 75 | // check for self-copy
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| 76 | ASSERT (this != &rhs,
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| 77 | "AtomicInstance<T>::AtomicInstance() - self-assignment not allowed for rhs copy.");
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| 78 | const_cast<AtomicInstance<T>&>(rhs).content = NULL;
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| 79 | }
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| 80 |
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| 81 | #endif /* ATOMICINSTANCE_IMPL_HPP_ */
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