declare the wx2os2PenStyle helper in the header.

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

diff --git a/include/wx/thread.h b/include/wx/thread.h
index 3f1415adc7830ec7563d2bd61b7104a36f084dbc..d4af63db350620da9e63286c6637b11a02da27c6 100644 (file)
--- a/include/wx/thread.h
+++ b/include/wx/thread.h
@@ -40,21 +40,21 @@
 
 enum wxMutexError
 {
 
 enum wxMutexError
 {

-  wxMUTEX_NO_ERROR = 0,
-  wxMUTEX_DEAD_LOCK,      // Mutex has been already locked by THE CALLING thread
-  wxMUTEX_BUSY,           // Mutex has been already locked by ONE thread
-  wxMUTEX_UNLOCKED,
-  wxMUTEX_MISC_ERROR
+    wxMUTEX_NO_ERROR = 0,
+    wxMUTEX_DEAD_LOCK,      // Mutex has been already locked by THE CALLING thread
+    wxMUTEX_BUSY,           // Mutex has been already locked by ONE thread
+    wxMUTEX_UNLOCKED,
+    wxMUTEX_MISC_ERROR

 };
 
 enum wxThreadError
 {
 };
 
 enum wxThreadError
 {

-  wxTHREAD_NO_ERROR = 0,      // No error
-  wxTHREAD_NO_RESOURCE,       // No resource left to create a new thread
-  wxTHREAD_RUNNING,           // The thread is already running
-  wxTHREAD_NOT_RUNNING,       // The thread isn't running
-  wxTHREAD_KILLED,            // Thread we waited for had to be killed
-  wxTHREAD_MISC_ERROR         // Some other error
+    wxTHREAD_NO_ERROR = 0,      // No error
+    wxTHREAD_NO_RESOURCE,       // No resource left to create a new thread
+    wxTHREAD_RUNNING,           // The thread is already running
+    wxTHREAD_NOT_RUNNING,       // The thread isn't running
+    wxTHREAD_KILLED,            // Thread we waited for had to be killed
+    wxTHREAD_MISC_ERROR         // Some other error

 };
 
 enum wxThreadKind
 };
 
 enum wxThreadKind


@@ -106,7 +106,7 @@ protected:
     wxMutex& operator=(const wxMutex&);
 
     int m_locked;
     wxMutex& operator=(const wxMutex&);
 
     int m_locked;

-    wxMutexInternal *p_internal;
+    wxMutexInternal *m_internal;

 };
 
 // a helper class which locks the mutex in the ctor and unlocks it in the dtor:
 };
 
 // a helper class which locks the mutex in the ctor and unlocks it in the dtor:


@@ -150,11 +150,11 @@ class WXDLLEXPORT wxCriticalSectionInternal;
 
 // in order to avoid any overhead under platforms where critical sections are
 // just mutexes make all wxCriticalSection class functions inline
 
 // 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__) && !defined(__WXMAC__)
+#if !defined(__WXMSW__) && !defined(__WXPM__)

     #define WXCRITICAL_INLINE   inline
 
     #define wxCRITSECT_IS_MUTEX 1
     #define WXCRITICAL_INLINE   inline
 
     #define wxCRITSECT_IS_MUTEX 1

-#else // MSW || Mac || OS2
+#else // MSW || OS2

     #define WXCRITICAL_INLINE
 
     #define wxCRITSECT_IS_MUTEX 0
     #define WXCRITICAL_INLINE
 
     #define wxCRITSECT_IS_MUTEX 0


@@ -213,28 +213,32 @@ private:
 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------

-// Condition handler.
+// Condition variable: allows to block the thread execution until something
+// happens (== condition is signaled)

 // ----------------------------------------------------------------------------
 
 class wxConditionInternal;
 class WXDLLEXPORT wxCondition
 {
 public:
 // ----------------------------------------------------------------------------
 
 class wxConditionInternal;
 class WXDLLEXPORT wxCondition
 {
 public:

-  // constructor & destructor
-  wxCondition();
-  ~wxCondition();
-
-  // Waits indefinitely.
-  void Wait(wxMutex& mutex);
-  // Waits until a signal is raised or the timeout is elapsed.
-  bool Wait(wxMutex& mutex, unsigned long sec, unsigned long nsec);
-  // Raises a signal: only one "Waiter" is released.
-  void Signal();
-  // Broadcasts to all "Waiters".
-  void Broadcast();
+    // constructor & destructor
+    wxCondition();
+    ~wxCondition();
+
+    // wait until the condition is signaled
+        // waits indefinitely.
+    void Wait();
+        // waits until a signal is raised or the timeout elapses
+    bool Wait(unsigned long sec, unsigned long nsec);
+
+    // signal the condition
+        // wakes up one (and only one) of the waiting threads
+    void Signal();
+        // wakes up all threads waiting onthis condition
+    void Broadcast();

 
 private:
 
 private:

-  wxConditionInternal *p_internal;
+    wxConditionInternal *m_internal;

 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------


@@ -276,6 +280,21 @@ public:
         // NB: at least under MSW worker threads can not call ::wxSleep()!
     static void Sleep(unsigned long milliseconds);
 
         // NB: at least under MSW worker threads can not call ::wxSleep()!
     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();
+
+        // 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);
     // constructor only creates the C++ thread object and doesn't create (or
     // start) the real thread
     wxThread(wxThreadKind kind = wxTHREAD_DETACHED);


@@ -381,7 +400,7 @@ private:
     friend class wxThreadInternal;
 
     // the (platform-dependent) thread class implementation
     friend class wxThreadInternal;
 
     // the (platform-dependent) thread class implementation

-    wxThreadInternal *p_internal;
+    wxThreadInternal *m_internal;

 
     // protects access to any methods of wxThreadInternal object
     wxCriticalSection m_critsect;
 
     // protects access to any methods of wxThreadInternal object
     wxCriticalSection m_critsect;


@@ -402,6 +421,7 @@ void WXDLLEXPORT wxMutexGuiLeave();
 // having to take them inside "#if wxUSE_THREADS"
 #define wxENTER_CRIT_SECT(cs)   (cs).Enter()
 #define wxLEAVE_CRIT_SECT(cs)   (cs).Leave()
 // having to take them inside "#if wxUSE_THREADS"
 #define wxENTER_CRIT_SECT(cs)   (cs).Enter()
 #define wxLEAVE_CRIT_SECT(cs)   (cs).Leave()

+#define wxCRIT_SECT_DECLARE(cs) static wxCriticalSection cs

 #define wxCRIT_SECT_LOCKER(name, cs)  wxCriticalSectionLocker name(cs)
 
 #else // !wxUSE_THREADS
 #define wxCRIT_SECT_LOCKER(name, cs)  wxCriticalSectionLocker name(cs)
 
 #else // !wxUSE_THREADS


@@ -416,6 +436,7 @@ inline void WXDLLEXPORT wxMutexGuiLeave() { }
 // having to take them inside "#if wxUSE_THREADS"
 #define wxENTER_CRIT_SECT(cs)
 #define wxLEAVE_CRIT_SECT(cs)
 // having to take them inside "#if wxUSE_THREADS"
 #define wxENTER_CRIT_SECT(cs)
 #define wxLEAVE_CRIT_SECT(cs)

+#define wxCRIT_SECT_DECLARE(cs)

 #define wxCRIT_SECT_LOCKER(name, cs)
 
 #endif // wxUSE_THREADS
 #define wxCRIT_SECT_LOCKER(name, cs)
 
 #endif // wxUSE_THREADS


@@ -450,7 +471,7 @@ public:
     // wxApp then should block all "dangerous" messages
     extern bool WXDLLEXPORT wxIsWaitingForThread();
 #elif defined(__WXMAC__)
     // wxApp then should block all "dangerous" messages
     extern bool WXDLLEXPORT wxIsWaitingForThread();
 #elif defined(__WXMAC__)

-    extern void WXDLLEXPORT wxMutexGuiLeaveOrEnter();
+   extern void WXDLLEXPORT wxMutexGuiLeaveOrEnter();

 
     // returns TRUE if the main thread has GUI lock
     extern bool WXDLLEXPORT wxGuiOwnedByMainThread();
 
     // returns TRUE if the main thread has GUI lock
     extern bool WXDLLEXPORT wxGuiOwnedByMainThread();


@@ -461,6 +482,13 @@ public:
     // return TRUE if the main thread is waiting for some other to terminate:
     // wxApp then should block all "dangerous" messages
     extern bool WXDLLEXPORT wxIsWaitingForThread();
     // return TRUE if the main thread is waiting for some other to terminate:
     // wxApp then should block all "dangerous" messages
     extern bool WXDLLEXPORT wxIsWaitingForThread();

+
+    // implement wxCriticalSection using mutexes
+    inline wxCriticalSection::wxCriticalSection() { }
+    inline wxCriticalSection::~wxCriticalSection() { }
+
+    inline void wxCriticalSection::Enter() { (void)m_mutex.Lock(); }
+    inline void wxCriticalSection::Leave() { (void)m_mutex.Unlock(); }

 #elif defined(__WXPM__)
     // 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
 #elif defined(__WXPM__)
     // 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