Header Cosmetics

[wxWidgets.git] / include / wx / thread.h

diff --git a/include/wx/thread.h b/include/wx/thread.h
index 24046e1d5af73c57c1875898518b7c09cd5d0ac0..fb33bde0f89d20c9b1fb240e3027f4bc7eb37603 100644 (file)
--- a/include/wx/thread.h
+++ b/include/wx/thread.h
@@ -23,7 +23,7 @@
 #if wxUSE_THREADS
 
 // only for wxUSE_THREADS - otherwise we'd get undefined symbols
-#if defined(__GNUG__) && !defined(__APPLE__)
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
     #pragma interface "thread.h"
 #endif
 
@@ -114,6 +114,7 @@ enum wxMutexType
 };
 
 // forward declarations
+class WXDLLIMPEXP_BASE wxThreadHelper;
 class WXDLLIMPEXP_BASE wxConditionInternal;
 class WXDLLIMPEXP_BASE wxMutexInternal;
 class WXDLLIMPEXP_BASE wxSemaphoreInternal;
@@ -208,11 +209,11 @@ private:
 
 // in order to avoid any overhead under platforms where critical sections are
 // just mutexes make all wxCriticalSection class functions inline
-#if !defined(__WXMSW__) && !defined(__WXPM__)
+#if !defined(__WXMSW__)
     #define wxCRITSECT_IS_MUTEX 1
 
     #define wxCRITSECT_INLINE inline
-#else // MSW || OS2
+#else // MSW
     #define wxCRITSECT_IS_MUTEX 0
 
     #define wxCRITSECT_INLINE
@@ -256,9 +257,7 @@ private:
 
         wxCritSectBuffer m_buffer;
     };
-#else
-    // nothing for OS/2
-#endif // Unix/Win32/OS2
+#endif // Unix&OS2/Win32
 
     DECLARE_NO_COPY_CLASS(wxCriticalSection)
 };
@@ -581,6 +580,84 @@ private:
     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)
+        : wxThread(wxTHREAD_JOINABLE), m_owner(owner)
+        { }
+
+protected:
+    // entry point for the thread -- calls Entry() in owner.
+    virtual void *Entry();
+
+private:
+    // the owner of the thread
+    wxThreadHelper& m_owner;
+
+    // no copy ctor/assignment operator
+    wxThreadHelperThread(const wxThreadHelperThread&);
+    wxThreadHelperThread& operator=(const wxThreadHelperThread&);
+};
+
+// ----------------------------------------------------------------------------
+// wxThreadHelper: this class implements the threading logic to run a
+// background task in another object (such as a window).  It is a mix-in: just
+// derive from it to implement a threading background task in your class.
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxThreadHelper
+{
+private:
+    void KillThread()
+    {
+        if ( m_thread )
+        {
+            m_thread->Kill();
+            delete m_thread;
+        }
+    }
+
+public:
+    // constructor only initializes m_thread to NULL
+    wxThreadHelper() : m_thread(NULL) { }
+
+    // destructor deletes m_thread
+    virtual ~wxThreadHelper() { KillThread(); }
+
+    // create a new thread (and optionally set the stack size on platforms that
+    // support/need that), call Run() to start it
+    wxThreadError Create(unsigned int stackSize = 0)
+    {
+        KillThread();
+
+        m_thread = new wxThreadHelperThread(*this);
+
+        return m_thread->Create(stackSize);
+    }
+
+    // entry point for the thread - called by Run() and executes in the context
+    // of this thread.
+    virtual void *Entry() = 0;
+
+    // returns a pointer to the thread which can be used to call Run()
+    wxThread *GetThread() const { return m_thread; }
+
+protected:
+    wxThread *m_thread;
+};
+
+// call Entry() in owner, put it down here to avoid circular declarations
+inline void *wxThreadHelperThread::Entry()
+{
+    return m_owner.Entry();
+}
+
 // ----------------------------------------------------------------------------
 // Automatic initialization
 // ----------------------------------------------------------------------------
@@ -655,7 +732,7 @@ public:
 
 #if wxUSE_THREADS
 
-#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXPM__)
+#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXPM__) || defined(__EMX__)
     // unlock GUI if there are threads waiting for and lock it back when
     // there are no more of them - should be called periodically by the main
     // thread