Added FindItemAtPoint

[wxWidgets.git] / docs / latex / wx / thread.tex

diff --git a/docs/latex/wx/thread.tex b/docs/latex/wx/thread.tex
index b530b6fa543cf359563cd6ebd2b51e2e2ce1d5ce..558d3cc70904e8b1b34a98c9773c13529364c6fb 100644 (file)
--- a/docs/latex/wx/thread.tex
+++ b/docs/latex/wx/thread.tex
@@ -11,7 +11,7 @@ such as \helpref{mutexes}{wxmutex} and/or \helpref{critical sections}{wxcritical
 There are two types of threads in wxWindows: {\it detached} and {\it joinable}
 ones, just as in the POSIX thread API (but unlike Win32 threads where all threads
 are joinable). The difference between the two is that only joinable threads
 There are two types of threads in wxWindows: {\it detached} and {\it joinable}
 ones, just as in the POSIX thread API (but unlike Win32 threads where all threads
 are joinable). The difference between the two is that only joinable threads

-can return a return code - this is returned by the Wait() function. Detached
+can return a return code -- this is returned by the Wait() function. Detached

 threads (the default type) cannot be waited for.
 
 You shouldn't hurry to create all the threads joinable, however, because this
 threads (the default type) cannot be waited for.
 
 You shouldn't hurry to create all the threads joinable, however, because this


@@ -42,12 +42,13 @@ None.
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 

+

 \membersection{wxThread::wxThread}\label{wxthreadctor}
 
 \func{}{wxThread}{\param{wxThreadKind }{kind = wxTHREAD\_DETACHED}}
 
 This constructor creates a new detached (default) or joinable C++ thread object. It
 \membersection{wxThread::wxThread}\label{wxthreadctor}
 
 \func{}{wxThread}{\param{wxThreadKind }{kind = wxTHREAD\_DETACHED}}
 
 This constructor creates a new detached (default) or joinable C++ thread object. It

-does not create or start execution of the real thread - for this you should
+does not create or start execution of the real thread -- for this you should

 use the \helpref{Create}{wxthreadcreate} and \helpref{Run}{wxthreadrun} methods.
 
 The possible values for {\it kind} parameters are:
 use the \helpref{Create}{wxthreadcreate} and \helpref{Run}{wxthreadrun} methods.
 
 The possible values for {\it kind} parameters are:


@@ -58,12 +59,13 @@ The possible values for {\it kind} parameters are:
 \twocolitem{{\bf wxTHREAD\_JOINABLE}}{Create a joinable thread}
 \end{twocollist}
 
 \twocolitem{{\bf wxTHREAD\_JOINABLE}}{Create a joinable thread}
 \end{twocollist}
 

+

 \membersection{wxThread::\destruct{wxThread}}
 
 \func{}{\destruct{wxThread}}{\void}
 
 The destructor frees the resources associated with the thread. Notice that you
 \membersection{wxThread::\destruct{wxThread}}
 
 \func{}{\destruct{wxThread}}{\void}
 
 The destructor frees the resources associated with the thread. Notice that you

-should never delete a detached thread - you may only call
+should never delete a detached thread -- you may only call

 \helpref{Delete}{wxthreaddelete} on it or wait until it terminates (and auto
 destructs) itself. Because the detached threads delete themselves, they can
 only be allocated on the heap.
 \helpref{Delete}{wxthreaddelete} on it or wait until it terminates (and auto
 destructs) itself. Because the detached threads delete themselves, they can
 only be allocated on the heap.


@@ -72,6 +74,7 @@ Joinable threads should be deleted explicitly. The \helpref{Delete}{wxthreaddele
 will not delete the C++ thread object. It is also safe to allocate them on
 stack.
 
 will not delete the C++ thread object. It is also safe to allocate them on
 stack.
 

+

 \membersection{wxThread::Create}\label{wxthreadcreate}
 
 \func{wxThreadError}{Create}{\param{unsigned int }{stackSize = 0}}
 \membersection{wxThread::Create}\label{wxthreadcreate}
 
 \func{wxThreadError}{Create}{\param{unsigned int }{stackSize = 0}}


@@ -92,6 +95,7 @@ One of:
 \twocolitem{{\bf wxTHREAD\_RUNNING}}{The thread is already running.}
 \end{twocollist}
 
 \twocolitem{{\bf wxTHREAD\_RUNNING}}{The thread is already running.}
 \end{twocollist}
 

+

 \membersection{wxThread::Delete}\label{wxthreaddelete}
 
 \func{void}{Delete}{\void}
 \membersection{wxThread::Delete}\label{wxthreaddelete}
 
 \func{void}{Delete}{\void}


@@ -107,23 +111,19 @@ until the thread terminates. As it may take a long time, and the message process
 is not stopped during this function execution, message handlers may be
 called from inside it!
 
 is not stopped during this function execution, message handlers may be
 called from inside it!
 

-Delete() may be called for thread in any state: running, paused or even not yet
-created. Moreover, it must be called if \helpref{Create}{wxthreadcreate} or
-\helpref{Run}{wxthreadrun} failed for a detached thread to free the memory
-occupied by the thread object. This cleanup will be done in the destructor for joinable
-threads.
-
-Delete() may be called for a thread in any state: running, paused or even not yet created. Moreover,
-it must be called if \helpref{Create}{wxthreadcreate} or \helpref{Run}{wxthreadrun} fail to free
-the memory occupied by the thread object. However, you should not call Delete()
-on a detached thread which already terminated - doing so will probably result
-in a crash because the thread object doesn't exist any more.
+Delete() may be called for a thread in any state: running, paused or even not
+yet created. Moreover, it must be called if \helpref{Create}{wxthreadcreate} or
+\helpref{Run}{wxthreadrun} fail in order to free the memory occupied by the
+thread object. However, you should not call Delete() on a detached thread which
+already terminated -- doing so will probably result in a crash because the
+thread object doesn't exist any more.

 
 For detached threads Delete() will also delete the C++ thread object, but it
 will not do this for joinable ones.
 
 This function can only be called from another thread context.
 
 
 For detached threads Delete() will also delete the C++ thread object, but it
 will not do this for joinable ones.
 
 This function can only be called from another thread context.
 

+

 \membersection{wxThread::Entry}\label{wxthreadentry}
 
 \func{virtual ExitCode}{Entry}{\void}
 \membersection{wxThread::Entry}\label{wxthreadentry}
 
 \func{virtual ExitCode}{Entry}{\void}


@@ -137,6 +137,7 @@ joinable threads and is the value returned by \helpref{Wait}{wxthreadwait}.
 This function is called by wxWindows itself and should never be called
 directly.
 
 This function is called by wxWindows itself and should never be called
 directly.
 

+

 \membersection{wxThread::Exit}\label{wxthreadexit}
 
 \func{void}{Exit}{\param{ExitCode }{exitcode = 0}}
 \membersection{wxThread::Exit}\label{wxthreadexit}
 
 \func{void}{Exit}{\param{ExitCode }{exitcode = 0}}


@@ -149,6 +150,7 @@ This function will terminate the OS thread (i.e. stop the associated path of
 execution) and also delete the associated C++ object for detached threads.
 \helpref{wxThread::OnExit}{wxthreadonexit} will be called just before exiting.
 
 execution) and also delete the associated C++ object for detached threads.
 \helpref{wxThread::OnExit}{wxthreadonexit} will be called just before exiting.
 

+

 \membersection{wxThread::GetCPUCount}\label{wxthreadgetcpucount}
 
 \func{static int}{GetCPUCount}{\void}
 \membersection{wxThread::GetCPUCount}\label{wxthreadgetcpucount}
 
 \func{static int}{GetCPUCount}{\void}


@@ -159,6 +161,7 @@ Returns the number of system CPUs or -1 if the value is unknown.
 
 \helpref{SetConcurrency}{wxthreadsetconcurrency}
 
 
 \helpref{SetConcurrency}{wxthreadsetconcurrency}
 

+

 \membersection{wxThread::GetCurrentId}\label{wxthreadgetcurrentid}
 
 \func{static unsigned long}{GetCurrentId}{\void}
 \membersection{wxThread::GetCurrentId}\label{wxthreadgetcurrentid}
 
 \func{static unsigned long}{GetCurrentId}{\void}


@@ -167,6 +170,7 @@ Returns the platform specific thread ID of the current thread as a
 long.  This can be used to uniquely identify threads, even if they are
 not wxThreads.
 
 long.  This can be used to uniquely identify threads, even if they are
 not wxThreads.
 

+

 \membersection{wxThread::GetId}\label{wxthreadgetid}
 
 \constfunc{unsigned long}{GetId}{\void}
 \membersection{wxThread::GetId}\label{wxthreadgetid}
 
 \constfunc{unsigned long}{GetId}{\void}


@@ -174,6 +178,7 @@ not wxThreads.
 Gets the thread identifier: this is a platform dependent number that uniquely identifies the
 thread throughout the system during its existence (i.e. the thread identifiers may be reused).
 
 Gets the thread identifier: this is a platform dependent number that uniquely identifies the
 thread throughout the system during its existence (i.e. the thread identifiers may be reused).
 

+

 \membersection{wxThread::GetPriority}\label{wxthreadgetpriority}
 
 \constfunc{int}{GetPriority}{\void}
 \membersection{wxThread::GetPriority}\label{wxthreadgetpriority}
 
 \constfunc{int}{GetPriority}{\void}


@@ -189,35 +194,50 @@ The following priorities are defined:
 \twocolitem{{\bf WXTHREAD\_MAX\_PRIORITY}}{100}
 \end{twocollist}
 
 \twocolitem{{\bf WXTHREAD\_MAX\_PRIORITY}}{100}
 \end{twocollist}
 

+

 \membersection{wxThread::IsAlive}\label{wxthreadisalive}
 
 \constfunc{bool}{IsAlive}{\void}
 
 \membersection{wxThread::IsAlive}\label{wxthreadisalive}
 
 \constfunc{bool}{IsAlive}{\void}
 

-Returns true if the thread is alive (i.e. started and not terminating).
+Returns \true if the thread is alive (i.e. started and not terminating).
+
+Note that this function can only be saely used with joinable threads, not
+detached ones as the latter delete themselves and so when the real thread is
+not alive any longer it is not possible to call this function neither because
+the wxThread object doesn't exist any more as well.
+

 
 \membersection{wxThread::IsDetached}\label{wxthreadisdetached}
 
 \constfunc{bool}{IsDetached}{\void}
 
 
 \membersection{wxThread::IsDetached}\label{wxthreadisdetached}
 
 \constfunc{bool}{IsDetached}{\void}
 

-Returns true if the thread is of the detached kind, false if it is a joinable one.
+Returns \true if the thread is of the detached kind, \false if it is a joinable
+one.
+

 
 \membersection{wxThread::IsMain}\label{wxthreadismain}
 
 \func{static bool}{IsMain}{\void}
 
 
 \membersection{wxThread::IsMain}\label{wxthreadismain}
 
 \func{static bool}{IsMain}{\void}
 

-Returns true if the calling thread is the main application thread.
+Returns \true if the calling thread is the main application thread.
+

 
 \membersection{wxThread::IsPaused}\label{wxthreadispaused}
 
 \constfunc{bool}{IsPaused}{\void}
 
 
 \membersection{wxThread::IsPaused}\label{wxthreadispaused}
 
 \constfunc{bool}{IsPaused}{\void}
 

-Returns true if the thread is paused.
+Returns \true if the thread is paused.
+

 
 \membersection{wxThread::IsRunning}\label{wxthreadisrunning}
 
 \constfunc{bool}{IsRunning}{\void}
 
 
 \membersection{wxThread::IsRunning}\label{wxthreadisrunning}
 
 \constfunc{bool}{IsRunning}{\void}
 

-Returns true if the thread is running.
+Returns \true if the thread is running.
+
+This method may only be safely used for joinable threads, see the remark in 
+\helpref{IsAlive}{wxthreadisalive}.
+

 
 \membersection{wxThread::Kill}\label{wxthreadkill}
 
 
 \membersection{wxThread::Kill}\label{wxthreadkill}
 


@@ -238,9 +258,10 @@ This function can only be called from another thread context, i.e. a thread
 cannot kill itself.
 
 It is also an error to call this function for a thread which is not running or
 cannot kill itself.
 
 It is also an error to call this function for a thread which is not running or

-paused (in the latter case, the thread will be resumed first) - if you do it,
+paused (in the latter case, the thread will be resumed first) -- if you do it,

 a {\tt wxTHREAD\_NOT\_RUNNING} error will be returned.
 
 a {\tt wxTHREAD\_NOT\_RUNNING} error will be returned.
 

+

 \membersection{wxThread::OnExit}\label{wxthreadonexit}
 
 \func{void}{OnExit}{\void}
 \membersection{wxThread::OnExit}\label{wxthreadonexit}
 
 \func{void}{OnExit}{\void}


@@ -252,6 +273,7 @@ thread. This function will not be called if the thread was
 
 This function should never be called directly.
 
 
 This function should never be called directly.
 

+

 \membersection{wxThread::Pause}\label{wxthreadpause}
 
 \func{wxThreadError}{Pause}{\void}
 \membersection{wxThread::Pause}\label{wxthreadpause}
 
 \func{wxThreadError}{Pause}{\void}


@@ -263,6 +285,7 @@ thread doesn't call it at all, it won't be suspended).
 
 This function can only be called from another thread context.
 
 
 This function can only be called from another thread context.
 

+

 \membersection{wxThread::Run}\label{wxthreadrun}
 
 \func{wxThreadError}{Run}{\void}
 \membersection{wxThread::Run}\label{wxthreadrun}
 
 \func{wxThreadError}{Run}{\void}


@@ -272,6 +295,7 @@ Starts the thread execution. Should be called after
 
 This function can only be called from another thread context.
 
 
 This function can only be called from another thread context.
 

+

 \membersection{wxThread::SetPriority}\label{wxthreadsetpriority}
 
 \func{void}{SetPriority}{\param{int}{ priority}}
 \membersection{wxThread::SetPriority}\label{wxthreadsetpriority}
 
 \func{void}{SetPriority}{\param{int}{ priority}}


@@ -289,6 +313,7 @@ The following priorities are already defined:
 \twocolitem{{\bf WXTHREAD\_MAX\_PRIORITY}}{100}
 \end{twocollist}
 
 \twocolitem{{\bf WXTHREAD\_MAX\_PRIORITY}}{100}
 \end{twocollist}
 

+

 \membersection{wxThread::Sleep}\label{wxthreadsleep}
 
 \func{static void}{Sleep}{\param{unsigned long }{milliseconds}}
 \membersection{wxThread::Sleep}\label{wxthreadsleep}
 
 \func{static void}{Sleep}{\param{unsigned long }{milliseconds}}


@@ -298,6 +323,7 @@ Pauses the thread execution for the given amount of time.
 This function should be used instead of \helpref{wxSleep}{wxsleep} by all worker
 threads (i.e. all except the main one).
 
 This function should be used instead of \helpref{wxSleep}{wxsleep} by all worker
 threads (i.e. all except the main one).
 

+

 \membersection{wxThread::Resume}\label{wxthreadresume}
 
 \func{wxThreadError}{Resume}{\void}
 \membersection{wxThread::Resume}\label{wxthreadresume}
 
 \func{wxThreadError}{Resume}{\void}


@@ -306,6 +332,7 @@ Resumes a thread suspended by the call to \helpref{Pause}{wxthreadpause}.
 
 This function can only be called from another thread context.
 
 
 This function can only be called from another thread context.
 

+

 \membersection{wxThread::SetConcurrency}\label{wxthreadsetconcurrency}
 
 \func{static bool}{SetConcurrency}{\param{size\_t }{level}}
 \membersection{wxThread::SetConcurrency}\label{wxthreadsetconcurrency}
 
 \func{static bool}{SetConcurrency}{\param{size\_t }{level}}


@@ -315,7 +342,8 @@ number of threads that the system tries to schedule to run in parallel.
 The value of $0$ for {\it level} may be used to set the default one.
 
 Returns true on success or false otherwise (for example, if this function is
 The value of $0$ for {\it level} may be used to set the default one.
 
 Returns true on success or false otherwise (for example, if this function is

-not implemented for this platform - currently everything except Solaris).
+not implemented for this platform -- currently everything except Solaris).
+

 
 \membersection{wxThread::TestDestroy}\label{wxthreadtestdestroy}
 
 
 \membersection{wxThread::TestDestroy}\label{wxthreadtestdestroy}
 


@@ -325,6 +353,7 @@ This function should be called periodically by the thread to ensure that calls
 to \helpref{Pause}{wxthreadpause} and \helpref{Delete}{wxthreaddelete} will
 work. If it returns true, the thread should exit as soon as possible.
 
 to \helpref{Pause}{wxthreadpause} and \helpref{Delete}{wxthreaddelete} will
 work. If it returns true, the thread should exit as soon as possible.
 

+

 \membersection{wxThread::This}\label{wxthreadthis}
 
 \func{static wxThread *}{This}{\void}
 \membersection{wxThread::This}\label{wxthreadthis}
 
 \func{static wxThread *}{This}{\void}


@@ -335,6 +364,7 @@ whether the thread is really the main one because NULL may also be returned for
 not created with wxThread class. Generally speaking, the return value for such a thread
 is undefined.
 
 not created with wxThread class. Generally speaking, the return value for such a thread
 is undefined.
 

+

 \membersection{wxThread::Yield}\label{wxthreadyield}
 
 \func{void}{Yield}{\void}
 \membersection{wxThread::Yield}\label{wxthreadyield}
 
 \func{void}{Yield}{\void}


@@ -342,6 +372,7 @@ is undefined.
 Give the rest of the thread time slice to the system allowing the other threads to run.
 See also \helpref{Sleep()}{wxthreadsleep}.
 
 Give the rest of the thread time slice to the system allowing the other threads to run.
 See also \helpref{Sleep()}{wxthreadsleep}.
 

+

 \membersection{wxThread::Wait}\label{wxthreadwait}
 
 \constfunc{ExitCode}{Wait}{\void}
 \membersection{wxThread::Wait}\label{wxthreadwait}
 
 \constfunc{ExitCode}{Wait}{\void}