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< div id = "projectbrief" > MUtilities< / div >
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< li class = "navelem" > < a class = "el" href = "../../d3/da6/namespace_m_utils.html" > MUtils< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../d0/dce/class_m_utils_1_1_lazy.html" > Lazy< / a > < / li > < / ul >
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< a href = "#pub-methods" > Public Member Functions< / a > |
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< div class = "title" > MUtils::Lazy< T > Class Template Reference< / div > < / div >
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< p > < a class = "el" href = "../../d0/dce/class_m_utils_1_1_lazy.html" title = "Lazy initialization template class. " > Lazy< / a > initialization template class.
< a href = "../../d0/dce/class_m_utils_1_1_lazy.html#details" > More...< / a > < / p >
< p > < code > #include < < a class = "el" href = "../../d8/d4d/_lazy_8h_source.html" > Lazy.h< / a > > < / code > < / p >
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Public Member Functions< / h2 > < / td > < / tr >
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  < / td > < td class = "memItemRight" valign = "bottom" > < b > Lazy< / b > (std::function< T *(void)> & & initializer)< / td > < / tr >
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T &   < / td > < td class = "memItemRight" valign = "bottom" > < b > operator*< / b > (void)< / td > < / tr >
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< a name = "details" id = "details" > < / a > < h2 class = "groupheader" > Detailed Description< / h2 >
< div class = "textblock" > < h3 > template< typename T> < br / >
class MUtils::Lazy< T > < / h3 >
< p > < a class = "el" href = "../../d0/dce/class_m_utils_1_1_lazy.html" title = "Lazy initialization template class. " > Lazy< / a > initialization template class. < / p >
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< p > The lazy-initialized value of type T can be obtained from a < code > < a class = "el" href = "../../d0/dce/class_m_utils_1_1_lazy.html" title = "Lazy initialization template class. " > Lazy< / a > < T> < / code > instance by using the < code > operator*()< / code > . Initialization of the value happens when the < code > operator*()< / code > is called for the very first time, by invoking the < code > initializer< / code > lambda-function that was passed to the constructor. The return value of the < code > initializer< / code > lambda-function is then stored internally, so that any subsequent call to the < code > operator*()< / code > < em > immediately< / em > returns the previously created value.< / p >
< p > < b > Note on thread-saftey:< / b > This class is thread-safe in the sense that all calls to < code > operator*()< / code > on the same < code > < a class = "el" href = "../../d0/dce/class_m_utils_1_1_lazy.html" title = "Lazy initialization template class. " > Lazy< / a > < T> < / code > instance, regardless from which thread, are guaranteed to return the exactly same value/object. Still, if the value has < em > not< / em > been initialized yet < b > and< / b > if multiple threads happen to call < code > operator*()< / code > at the same time, then the < code > initializer< / code > lambda-function < em > may< / em > be invoked more than once (concurrently and by different threads). In that case, all but one return value of the < code > initializer< / code > lambda-function are discarded, and all threads eventually obtain the same value/object. < / p >
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< / div > < hr / > The documentation for this class was generated from the following file:< ul >
< li > include/MUtils/< a class = "el" href = "../../d8/d4d/_lazy_8h_source.html" > Lazy.h< / a > < / li >
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