| 1 | \section{\class{wxCondition}}\label{wxcondition} |
| 2 | |
| 3 | wxCondition variables correspond to pthread conditions or to Win32 event |
| 4 | objects. They may be used in a multithreaded application to wait until the |
| 5 | given condition becomes true which happens when the condition becomes signaled. |
| 6 | |
| 7 | For example, if a worker thread is doing some long task and another thread has |
| 8 | to wait until it is finished, the latter thread will wait on the condition |
| 9 | object and the worker thread will signal it on exit (this example is not |
| 10 | perfect because in this particular case it would be much better to just |
| 11 | \helpref{Wait()}{wxthreadwait} for the worker thread, but if there are several |
| 12 | worker threads it already makes much more sense). |
| 13 | |
| 14 | Once the thread(s) are signaled, the condition then resets to the not |
| 15 | signaled state, ready to fire again. |
| 16 | |
| 17 | \wxheading{Derived from} |
| 18 | |
| 19 | None. |
| 20 | |
| 21 | \wxheading{Include files} |
| 22 | |
| 23 | <wx/thread.h> |
| 24 | |
| 25 | \wxheading{See also} |
| 26 | |
| 27 | \helpref{wxThread}{wxthread}, \helpref{wxMutex}{wxmutex} |
| 28 | |
| 29 | \latexignore{\rtfignore{\wxheading{Members}}} |
| 30 | |
| 31 | \membersection{wxCondition::wxCondition}\label{wxconditionconstr} |
| 32 | |
| 33 | \func{}{wxCondition}{\void} |
| 34 | |
| 35 | Default constructor. |
| 36 | |
| 37 | \membersection{wxCondition::\destruct{wxCondition}} |
| 38 | |
| 39 | \func{}{\destruct{wxCondition}}{\void} |
| 40 | |
| 41 | Destroys the wxCondition object. |
| 42 | |
| 43 | \membersection{wxCondition::Broadcast}\label{wxconditionbroadcast} |
| 44 | |
| 45 | \func{void}{Broadcast}{\void} |
| 46 | |
| 47 | Broadcasts to all waiting objects. |
| 48 | |
| 49 | \membersection{wxCondition::Signal}\label{wxconditionsignal} |
| 50 | |
| 51 | \func{void}{Signal}{\void} |
| 52 | |
| 53 | Signals the object. |
| 54 | |
| 55 | \membersection{wxCondition::Wait}\label{wxconditionwait} |
| 56 | |
| 57 | \func{void}{Wait}{\void} |
| 58 | |
| 59 | Waits indefinitely. |
| 60 | |
| 61 | \func{bool}{Wait}{\param{unsigned long}{ sec}, \param{unsigned long}{ nsec}} |
| 62 | |
| 63 | Waits until a signal is raised or the timeout has elapsed. |
| 64 | |
| 65 | \wxheading{Parameters} |
| 66 | |
| 67 | \docparam{sec}{Timeout in seconds} |
| 68 | |
| 69 | \docparam{nsec}{Timeout nanoseconds component (added to {\it sec}).} |
| 70 | |
| 71 | \wxheading{Return value} |
| 72 | |
| 73 | The second form returns if the signal was raised, or FALSE if there was a timeout. |
| 74 | |