X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/20e85460c40ebc4dcc9577928771adb264cc998f..9fc3ad34c5326856aeebf02335244ae315cef688:/docs/latex/wx/tthreads.tex diff --git a/docs/latex/wx/tthreads.tex b/docs/latex/wx/tthreads.tex index 531a04375b..2e1d6cb80d 100644 --- a/docs/latex/wx/tthreads.tex +++ b/docs/latex/wx/tthreads.tex @@ -8,7 +8,10 @@ wxWindows provides a complete set of classes encapsulating objects necessary in multithreaded (MT) programs: the \helpref{thread}{wxthread} class itself and different synchronization objects: \helpref{mutexes}{wxmutex} and \helpref{critical sections}{wxcriticalsection} with -\helpref{conditions}{wxcondition}. +\helpref{conditions}{wxcondition}. The thread API in wxWindows resembles to +POSIX1.c threads API (a.k.a. pthreads), although several functions have +different names and some features inspired by Win32 thread API are there as +well. These classes will hopefully make writing MT programs easier and they also provide some extra error checking (compared to the native (be it Win32 or Posix) @@ -21,7 +24,7 @@ new thread for each new client), but in others it might be a very poor choice (example: launching a separate thread when doing a long computation to show a progress dialog). Other implementation choices are available: for the progress dialog example it is far better to do the calculations in the -\helpref{idle handler}{wxidleevent} or call \helpref{wxYield()}{wxyield} +\helpref{idle handler}{wxidleevent} or call \helpref{wxYield()}{wxyield} periodically to update the screen. If you do decide to use threads in your application, it is strongly recommended @@ -34,10 +37,10 @@ more robust and will undoubtedly save you countless problems (example: under Win32 a thread can only access GDI objects such as pens, brushes, \&c created by itself and not by the other threads). -Final note: in the current release of wxWindows, there are no specific -facilities for communicating between the threads. However, the usual -\helpref{ProcessEvent()}{wxevthandlerprocessevent} function may be used for -thread communication too - but you should provide your own synchronisation -mechanism if you use it (e.g. just use a critical section before sending a -message) because there is no built-in synchronisation. +For communication between threads, use +\helpref{wxEvtHandler::AddPendingEvent}{wxevthandleraddpendingprocessevent} +or its short version \helpref{wxPostEvent}{wxpostevent}. These functions +have thread safe implementation so that they can be used as they are for +sending event from one thread to another. +