+ // static functions
+ // Returns the wxThread object for the calling thread. NULL is returned
+ // if the caller is the main thread (but it's recommended to use
+ // IsMain() and only call This() for threads other than the main one
+ // because NULL is also returned on error). If the thread wasn't
+ // created with wxThread class, the returned value is undefined.
+ static wxThread *This();
+
+ // Returns true if current thread is the main thread.
+ //
+ // Notice that it also returns true if main thread id hadn't been
+ // initialized yet on the assumption that it's too early in wx startup
+ // process for any other threads to have been created in this case.
+ static bool IsMain()
+ {
+ return !ms_idMainThread || GetCurrentId() == ms_idMainThread;
+ }
+
+ // Return the main thread id
+ static wxThreadIdType GetMainId() { return ms_idMainThread; }
+
+ // Release the rest of our time slice letting the other threads run
+ static void Yield();
+
+ // Sleep during the specified period of time in milliseconds
+ //
+ // This is the same as wxMilliSleep().
+ static void Sleep(unsigned long milliseconds);
+
+ // get the number of system CPUs - useful with SetConcurrency()
+ // (the "best" value for it is usually number of CPUs + 1)
+ //
+ // Returns -1 if unknown, number of CPUs otherwise
+ static int GetCPUCount();
+
+ // Get the platform specific thread ID and return as a long. This
+ // can be used to uniquely identify threads, even if they are not
+ // wxThreads. This is used by wxPython.
+ static wxThreadIdType GetCurrentId();
+
+ // sets the concurrency level: this is, roughly, the number of threads
+ // the system tries to schedule to run in parallel. 0 means the
+ // default value (usually acceptable, but may not yield the best
+ // performance for this process)
+ //
+ // Returns true on success, false otherwise (if not implemented, for
+ // example)
+ static bool SetConcurrency(size_t level);
+
+ // constructor only creates the C++ thread object and doesn't create (or
+ // start) the real thread
+ wxThread(wxThreadKind kind = wxTHREAD_DETACHED);
+
+ // functions that change the thread state: all these can only be called
+ // from _another_ thread (typically the thread that created this one, e.g.
+ // the main thread), not from the thread itself
+
+ // create a new thread and optionally set the stack size on
+ // platforms that support that - call Run() to start it
+ // (special cased for watcom which won't accept 0 default)
+
+ wxThreadError Create(unsigned int stackSize = 0);
+
+ // starts execution of the thread - from the moment Run() is called
+ // the execution of wxThread::Entry() may start at any moment, caller
+ // shouldn't suppose that it starts after (or before) Run() returns.
+ wxThreadError Run();
+
+ // stops the thread if it's running and deletes the wxThread object if
+ // this is a detached thread freeing its memory - otherwise (for
+ // joinable threads) you still need to delete wxThread object
+ // yourself.
+ //
+ // this function only works if the thread calls TestDestroy()
+ // periodically - the thread will only be deleted the next time it
+ // does it!
+ //
+ // will fill the rc pointer with the thread exit code if it's !NULL
+ wxThreadError Delete(ExitCode *rc = NULL,
+ wxThreadWait waitMode = wxTHREAD_WAIT_DEFAULT);
+
+ // waits for a joinable thread to finish and returns its exit code
+ //
+ // Returns (ExitCode)-1 on error (for example, if the thread is not
+ // joinable)
+ ExitCode Wait(wxThreadWait waitMode = wxTHREAD_WAIT_DEFAULT);
+
+ // kills the thread without giving it any chance to clean up - should
+ // not be used under normal circumstances, use Delete() instead.
+ // It is a dangerous function that should only be used in the most
+ // extreme cases!
+ //
+ // The wxThread object is deleted by Kill() if the thread is
+ // detachable, but you still have to delete it manually for joinable
+ // threads.
+ wxThreadError Kill();
+
+ // pause a running thread: as Delete(), this only works if the thread
+ // calls TestDestroy() regularly
+ wxThreadError Pause();
+
+ // resume a paused thread
+ wxThreadError Resume();
+
+ // priority
+ // Sets the priority to "prio": see WXTHREAD_XXX_PRIORITY constants
+ //
+ // NB: the priority can only be set before the thread is created
+ void SetPriority(unsigned int prio);
+
+ // Get the current priority.
+ unsigned int GetPriority() const;
+
+ // thread status inquiries
+ // Returns true if the thread is alive: i.e. running or suspended
+ bool IsAlive() const;
+ // Returns true if the thread is running (not paused, not killed).
+ bool IsRunning() const;
+ // Returns true if the thread is suspended
+ bool IsPaused() const;
+
+ // is the thread of detached kind?
+ bool IsDetached() const { return m_isDetached; }
+
+ // Get the thread ID - a platform dependent number which uniquely
+ // identifies a thread inside a process
+ wxThreadIdType GetId() const;
+
+ wxThreadKind GetKind() const
+ { return m_isDetached ? wxTHREAD_DETACHED : wxTHREAD_JOINABLE; }
+
+ // Returns true if the thread was asked to terminate: this function should
+ // be called by the thread from time to time, otherwise the main thread
+ // will be left forever in Delete()!
+ virtual bool TestDestroy();
+
+ // dtor is public, but the detached threads should never be deleted - use
+ // Delete() instead (or leave the thread terminate by itself)
+ virtual ~wxThread();
+
+protected:
+ // exits from the current thread - can be called only from this thread
+ void Exit(ExitCode exitcode = 0);
+
+ // entry point for the thread - called by Run() and executes in the context
+ // of this thread.
+ virtual void *Entry() = 0;
+
+
+ // Callbacks which may be overridden by the derived class to perform some
+ // specific actions when the thread is deleted or killed. By default they
+ // do nothing.
+
+ // This one is called by Delete() before actually deleting the thread and
+ // is executed in the context of the thread that called Delete().
+ virtual void OnDelete() {}
+
+ // This one is called by Kill() before killing the thread and is executed
+ // in the context of the thread that called Kill().
+ virtual void OnKill() {}
+
+private:
+ // no copy ctor/assignment operator
+ wxThread(const wxThread&);
+ wxThread& operator=(const wxThread&);
+
+ // called when the thread exits - in the context of this thread
+ //
+ // NB: this function will not be called if the thread is Kill()ed
+ virtual void OnExit() { }
+
+ friend class wxThreadInternal;
+ friend class wxThreadModule;
+
+
+ // the main thread identifier, should be set on startup
+ static wxThreadIdType ms_idMainThread;
+
+ // the (platform-dependent) thread class implementation
+ wxThreadInternal *m_internal;
+
+ // protects access to any methods of wxThreadInternal object
+ wxCriticalSection m_critsect;
+
+ // true if the thread is detached, false if it is joinable
+ bool m_isDetached;
+};
+
+// wxThreadHelperThread class
+// --------------------------
+
+class WXDLLIMPEXP_BASE wxThreadHelperThread : public wxThread
+{
+public:
+ // constructor only creates the C++ thread object and doesn't create (or
+ // start) the real thread
+ wxThreadHelperThread(wxThreadHelper& owner, wxThreadKind kind)
+ : wxThread(kind), m_owner(owner)
+ { }
projects / wxWidgets.git / blobdiff