a7af285d1a
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47777 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
63 lines
2.0 KiB
TeX
63 lines
2.0 KiB
TeX
\section{\class{wxCriticalSection}}\label{wxcriticalsection}
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A critical section object is used for exactly the same purpose as
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\helpref{mutexes}{wxmutex}. The only difference is that under Windows platform
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critical sections are only visible inside one process, while mutexes may be
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shared between processes, so using critical sections is slightly more
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efficient. The terminology is also slightly different: mutex may be locked (or
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acquired) and unlocked (or released) while critical section is entered and left
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by the program.
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Finally, you should try to use
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\helpref{wxCriticalSectionLocker}{wxcriticalsectionlocker} class whenever
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possible instead of directly using wxCriticalSection for the same reasons
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\helpref{wxMutexLocker}{wxmutexlocker} is preferrable to
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\helpref{wxMutex}{wxmutex} - please see wxMutex for an example.
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\wxheading{Derived from}
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None.
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\wxheading{Include files}
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<wx/thread.h>
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\wxheading{Library}
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\helpref{wxBase}{librarieslist}
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\wxheading{See also}
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\helpref{wxThread}{wxthread}, \helpref{wxCondition}{wxcondition},
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\helpref{wxCriticalSectionLocker}{wxcriticalsectionlocker}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxCriticalSection::wxCriticalSection}\label{wxcriticalsectionctor}
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\func{}{wxCriticalSection}{\void}
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Default constructor initializes critical section object.
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\membersection{wxCriticalSection::\destruct{wxCriticalSection}}\label{wxcriticalsectiondtor}
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\func{}{\destruct{wxCriticalSection}}{\void}
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Destructor frees the resources.
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\membersection{wxCriticalSection::Enter}\label{wxcriticalsectionenter}
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\func{void }{Enter}{\void}
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Enter the critical section (same as locking a mutex). There is no error return
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for this function. After entering the critical section protecting some global
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data the thread running in critical section may safely use/modify it.
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\membersection{wxCriticalSection::Leave}\label{wxcriticalsectionleave}
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\func{void }{Leave}{\void}
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Leave the critical section allowing other threads use the global data protected
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by it. There is no error return for this function.
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