#ifndef __THREADH__
#define __THREADH__
-#ifdef __GNUG__
- #pragma interface "thread.h"
-#endif
-
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#if wxUSE_THREADS
+// only for wxUSE_THREADS - otherwise we'd get undefined symbols
+#ifdef __GNUG__
+ #pragma interface "thread.h"
+#endif
+
// Windows headers define it
#ifdef Yield
#undef Yield
// constants
// ----------------------------------------------------------------------------
-typedef enum
+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
-} wxMutexError;
+};
-typedef enum
+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_MISC_ERROR // Some other error
-} wxThreadError;
+};
// defines the interval of priority
-#define WXTHREAD_MIN_PRIORITY 0u
-#define WXTHREAD_DEFAULT_PRIORITY 50u
-#define WXTHREAD_MAX_PRIORITY 100u
+enum
+{
+ WXTHREAD_MIN_PRIORITY = 0u,
+ WXTHREAD_DEFAULT_PRIORITY = 50u,
+ WXTHREAD_MAX_PRIORITY = 100u
+};
// ----------------------------------------------------------------------------
// A mutex object is a synchronization object whose state is set to signaled
// Critical section: this is the same as mutex but is only visible to the
// threads of the same process. For the platforms which don't have native
// support for critical sections, they're implemented entirely in terms of
-// mutexes
+// mutexes.
+//
+// NB: wxCriticalSection object does not allocate any memory in its ctor
+// which makes it possible to have static globals of this class
// ----------------------------------------------------------------------------
-// in order to avoid any overhead under !MSW make all wxCriticalSection class
-// functions inline - but this can't be done under MSW
-#ifdef __WXMSW__
- class WXDLLEXPORT wxCriticalSectionInternal;
- #define WXCRITICAL_INLINE
-#else // !MSW
+class WXDLLEXPORT wxCriticalSectionInternal;
+
+// 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__)
#define WXCRITICAL_INLINE inline
+
+ #define wxCRITSECT_IS_MUTEX 1
+#else // MSW || Mac || OS2
+ #define WXCRITICAL_INLINE
+
+ #define wxCRITSECT_IS_MUTEX 0
#endif // MSW/!MSW
// you should consider wxCriticalSectionLocker whenever possible instead of
WXCRITICAL_INLINE ~wxCriticalSection();
// enter the section (the same as locking a mutex)
- void WXCRITICAL_INLINE Enter();
+ WXCRITICAL_INLINE void Enter();
// leave the critical section (same as unlocking a mutex)
- void WXCRITICAL_INLINE Leave();
+ WXCRITICAL_INLINE void Leave();
private:
// no assignment operator nor copy ctor
wxCriticalSection(const wxCriticalSection&);
wxCriticalSection& operator=(const wxCriticalSection&);
-#ifdef __WXMSW__
- wxCriticalSectionInternal *m_critsect;
-#else // !MSW
+#if wxCRITSECT_IS_MUTEX
wxMutex m_mutex;
-#endif // MSW/!MSW
+#elif defined(__WXMSW__)
+ // we can't allocate any memory in the ctor, so use placement new -
+ // unfortunately, we have to hardcode the sizeof() here because we can't
+ // include windows.h from this public header
+ char m_buffer[24];
+#elif !defined(__WXPM__)
+ wxCriticalSectionInternal *m_critsect;
+#else
+ // nothing for OS/2
+#endif // !Unix/Unix
};
// keep your preprocessor name space clean
class WXDLLEXPORT wxCriticalSectionLocker
{
public:
- wxCriticalSectionLocker(wxCriticalSection& critsect) : m_critsect(critsect)
- { m_critsect.Enter(); }
- ~wxCriticalSectionLocker()
- { m_critsect.Leave(); }
+ inline wxCriticalSectionLocker(wxCriticalSection& critsect);
+ inline ~wxCriticalSectionLocker();
private:
// no assignment operator nor copy ctor
// Returns true if the thread is running (not paused, not killed).
bool IsRunning() const;
// Returns true if the thread is suspended
- bool IsPaused() const { return IsAlive() && !IsRunning(); }
+ bool IsPaused() const;
// called when the thread exits - in the context of this thread
//
// 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()!
- bool TestDestroy() const;
+ bool TestDestroy();
// exits from the current thread - can be called only from this thread
void Exit(void *exitcode = 0);
void WXDLLEXPORT wxMutexGuiEnter();
void WXDLLEXPORT wxMutexGuiLeave();
+// macros for entering/leaving critical sections which may be used without
+// 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_LOCKER(name, cs) wxCriticalSectionLocker name(*cs)
+
#else // !wxUSE_THREADS
+#include "wx/defs.h" // for WXDLLEXPORT
+
// no thread support
inline void WXDLLEXPORT wxMutexGuiEnter() { }
inline void WXDLLEXPORT wxMutexGuiLeave() { }
+// macros for entering/leaving critical sections which may be used without
+// having to take them inside "#if wxUSE_THREADS"
+#define wxENTER_CRIT_SECT(cs)
+#define wxLEAVE_CRIT_SECT(cs)
+#define wxCRIT_SECT_LOCKER(name, cs)
+
#endif // wxUSE_THREADS
// automatically unlock GUI mutex in dtor
// -----------------------------------------------------------------------------
// implementation only until the end of file
// -----------------------------------------------------------------------------
-#ifdef wxUSE_THREADS
-#ifdef __WXMSW__
+
+#if wxUSE_THREADS
+
+#if defined(__WXMSW__)
// 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
// return TRUE if the main thread is waiting for some other to terminate:
// wxApp then should block all "dangerous" messages
extern bool WXDLLEXPORT wxIsWaitingForThread();
-#else // !MSW
+#elif defined(__WXMAC__)
+ extern void WXDLLEXPORT wxMutexGuiLeaveOrEnter();
+
+ // returns TRUE if the main thread has GUI lock
+ extern bool WXDLLEXPORT wxGuiOwnedByMainThread();
+
+ // wakes up the main thread if it's sleeping inside ::GetMessage()
+ extern void WXDLLEXPORT wxWakeUpMainThread();
+
+ // return TRUE if the main thread is waiting for some other to terminate:
+ // wxApp then should block all "dangerous" messages
+ extern bool WXDLLEXPORT wxIsWaitingForThread();
+#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
+ // thread
+ extern void WXDLLEXPORT wxMutexGuiLeaveOrEnter();
+
+ // returns TRUE if the main thread has GUI lock
+ extern bool WXDLLEXPORT wxGuiOwnedByMainThread();
+
+ // return TRUE if the main thread is waiting for some other to terminate:
+ // wxApp then should block all "dangerous" messages
+ extern bool WXDLLEXPORT wxIsWaitingForThread();
+
+#else // !MSW && !PM
// 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(); }
#endif // MSW/!MSW
+
+ // we can define these inline functions now (they should be defined after
+ // wxCriticalSection::Enter/Leave)
+ inline
+ wxCriticalSectionLocker:: wxCriticalSectionLocker(wxCriticalSection& cs)
+ : m_critsect(cs) { m_critsect.Enter(); }
+ inline
+ wxCriticalSectionLocker::~wxCriticalSectionLocker() { m_critsect.Leave(); }
#endif // wxUSE_THREADS
#endif // __THREADH__
projects / wxWidgets.git / blobdiff