X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0f00be4b33cdf013af6b64bfbd0e6841e7f0d574..0ba6faaeeeec36fe4e6fc376f2f5edc1c0d34334:/src/msw/thread.cpp?ds=sidebyside diff --git a/src/msw/thread.cpp b/src/msw/thread.cpp index 24aa2a43fd..942a0379da 100644 --- a/src/msw/thread.cpp +++ b/src/msw/thread.cpp @@ -10,10 +10,6 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) - #pragma implementation "thread.h" -#endif - // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- @@ -25,20 +21,24 @@ #pragma hdrstop #endif +#if wxUSE_THREADS + +#include "wx/thread.h" + #ifndef WX_PRECOMP #include "wx/intl.h" #include "wx/app.h" + #include "wx/module.h" #endif -#if wxUSE_THREADS - #include "wx/apptrait.h" +#include "wx/scopeguard.h" #include "wx/msw/private.h" #include "wx/msw/missing.h" +#include "wx/msw/seh.h" -#include "wx/module.h" -#include "wx/thread.h" +#include "wx/except.h" // must have this symbol defined to get _beginthread/_endthread declarations #ifndef _MT @@ -76,7 +76,7 @@ #include // the return type of the thread function entry point - typedef unsigned THREAD_RETVAL; + typedef wxUIntPtr THREAD_RETVAL; // the calling convention of the thread function entry point #define THREAD_CALLCONV __stdcall @@ -86,6 +86,8 @@ #define THREAD_CALLCONV WINAPI #endif +static const THREAD_RETVAL THREAD_ERROR_EXIT = (THREAD_RETVAL)-1; + // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- @@ -178,7 +180,8 @@ public: bool IsOk() const { return m_mutex != NULL; } wxMutexError Lock() { return LockTimeout(INFINITE); } - wxMutexError TryLock() { return LockTimeout(0); } + wxMutexError Lock(unsigned long ms) { return LockTimeout(ms); } + wxMutexError TryLock(); wxMutexError Unlock(); private: @@ -196,7 +199,7 @@ wxMutexInternal::wxMutexInternal(wxMutexType WXUNUSED(mutexType)) m_mutex = ::CreateMutex ( NULL, // default secutiry attributes - false, // not initially locked + FALSE, // not initially locked NULL // no name ); @@ -217,6 +220,14 @@ wxMutexInternal::~wxMutexInternal() } } +wxMutexError wxMutexInternal::TryLock() +{ + const wxMutexError rc = LockTimeout(0); + + // we have a special return code for timeout in this case + return rc == wxMUTEX_TIMEOUT ? wxMUTEX_BUSY : rc; +} + wxMutexError wxMutexInternal::LockTimeout(DWORD milliseconds) { DWORD rc = ::WaitForSingleObject(m_mutex, milliseconds); @@ -237,7 +248,7 @@ wxMutexError wxMutexInternal::LockTimeout(DWORD milliseconds) break; case WAIT_TIMEOUT: - return wxMUTEX_BUSY; + return wxMUTEX_TIMEOUT; case WAIT_ABANDONED: // checked for above default: @@ -355,14 +366,22 @@ wxSemaError wxSemaphoreInternal::Post() { #if !defined(_WIN32_WCE) || (_WIN32_WCE >= 300) if ( !::ReleaseSemaphore(m_semaphore, 1, NULL /* ptr to previous count */) ) -#endif { - wxLogLastError(_T("ReleaseSemaphore")); - - return wxSEMA_MISC_ERROR; + if ( GetLastError() == ERROR_TOO_MANY_POSTS ) + { + return wxSEMA_OVERFLOW; + } + else + { + wxLogLastError(_T("ReleaseSemaphore")); + return wxSEMA_MISC_ERROR; + } } return wxSEMA_NO_ERROR; +#else + return wxSEMA_MISC_ERROR; +#endif } // ---------------------------------------------------------------------------- @@ -431,9 +450,16 @@ public: HANDLE GetHandle() const { return m_hThread; } DWORD GetId() const { return m_tid; } - // thread function + // the thread function forwarding to DoThreadStart static THREAD_RETVAL THREAD_CALLCONV WinThreadStart(void *thread); + // really start the thread (if it's not already dead) + static THREAD_RETVAL DoThreadStart(wxThread *thread); + + // call OnExit() on the thread + static void DoThreadOnExit(wxThread *thread); + + void KeepAlive() { if ( m_thread->IsDetached() ) @@ -475,45 +501,77 @@ private: wxThreadInternal& m_thrImpl; }; - -THREAD_RETVAL THREAD_CALLCONV wxThreadInternal::WinThreadStart(void *param) +/* static */ +void wxThreadInternal::DoThreadOnExit(wxThread *thread) { - THREAD_RETVAL rc; + wxTRY + { + thread->OnExit(); + } + wxCATCH_ALL( wxTheApp->OnUnhandledException(); ) +} - wxThread * const thread = (wxThread *)param; +/* static */ +THREAD_RETVAL wxThreadInternal::DoThreadStart(wxThread *thread) +{ + wxON_BLOCK_EXIT1(DoThreadOnExit, thread); - // first of all, check whether we hadn't been cancelled already and don't - // start the user code at all then - const bool hasExited = thread->m_internal->GetState() == STATE_EXITED; + THREAD_RETVAL rc = THREAD_ERROR_EXIT; - if ( hasExited ) - { - rc = (THREAD_RETVAL)-1; - } - else // do run thread + wxTRY { // store the thread object in the TLS if ( !::TlsSetValue(gs_tlsThisThread, thread) ) { wxLogSysError(_("Can not start thread: error writing TLS.")); - return (DWORD)-1; + return THREAD_ERROR_EXIT; } rc = (THREAD_RETVAL)thread->Entry(); } + wxCATCH_ALL( wxTheApp->OnUnhandledException(); ) + + return rc; +} + +/* static */ +THREAD_RETVAL THREAD_CALLCONV wxThreadInternal::WinThreadStart(void *param) +{ + THREAD_RETVAL rc = THREAD_ERROR_EXIT; + + wxThread * const thread = (wxThread *)param; + + // each thread has its own SEH translator so install our own a.s.a.p. + DisableAutomaticSETranslator(); + + // first of all, check whether we hadn't been cancelled already and don't + // start the user code at all then + const bool hasExited = thread->m_internal->GetState() == STATE_EXITED; + + // run the thread function itself inside a SEH try/except block + wxSEH_TRY + { + if ( hasExited ) + DoThreadOnExit(thread); + else + rc = DoThreadStart(thread); + } + wxSEH_HANDLE(THREAD_ERROR_EXIT) - thread->OnExit(); // save IsDetached because thread object can be deleted by joinable // threads after state is changed to STATE_EXITED. - bool isDetached = thread->IsDetached(); - + const bool isDetached = thread->IsDetached(); if ( !hasExited ) { // enter m_critsect before changing the thread state - wxCriticalSectionLocker lock(thread->m_critsect); + // + // NB: can't use wxCriticalSectionLocker here as we use SEH and it's + // incompatible with C++ object dtors + thread->m_critsect.Enter(); thread->m_internal->SetState(STATE_EXITED); + thread->m_critsect.Leave(); } // the thread may delete itself now if it wants, we don't need it any more @@ -606,7 +664,7 @@ bool wxThreadInternal::Create(wxThread *thread, unsigned int stackSize) wxThreadError wxThreadInternal::Kill() { - if ( !::TerminateThread(m_hThread, (DWORD)-1) ) + if ( !::TerminateThread(m_hThread, THREAD_ERROR_EXIT) ) { wxLogSysError(_("Couldn't terminate thread")); @@ -632,7 +690,7 @@ wxThreadInternal::WaitForTerminate(wxCriticalSection& cs, // from Wait()) or ask it to terminate (when called from Delete()) bool shouldDelete = threadToDelete != NULL; - wxThread::ExitCode rc = 0; + DWORD rc = 0; // we might need to resume the thread if it's currently stopped bool shouldResume = false; @@ -705,15 +763,16 @@ wxThreadInternal::WaitForTerminate(wxCriticalSection& cs, } } - result = ::MsgWaitForMultipleObjects - ( - 1, // number of objects to wait for - &m_hThread, // the objects - false, // don't wait for all objects - INFINITE, // no timeout - QS_ALLINPUT | // return as soon as there are any events - QS_ALLPOSTMESSAGE - ); + wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL; + if ( traits ) + { + result = traits->WaitForThread(m_hThread); + } + else // can't wait for the thread + { + // so kill it below + result = 0xFFFFFFFF; + } switch ( result ) { @@ -738,15 +797,6 @@ wxThreadInternal::WaitForTerminate(wxCriticalSection& cs, // the system might dead lock then if ( wxThread::IsMain() ) { - // it looks that sometimes WAIT_OBJECT_0 + 1 is - // returned but there are no messages in the thread - // queue -- prevent DoMessageFromThreadWait() from - // blocking inside ::GetMessage() forever in this case - ::PostMessage(NULL, WM_NULL, 0, 0); - - wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() - : NULL; - if ( traits && !traits->DoMessageFromThreadWait() ) { // WM_QUIT received: kill the thread @@ -773,16 +823,16 @@ wxThreadInternal::WaitForTerminate(wxCriticalSection& cs, // terminated if the "if" above hadn't been taken for ( ;; ) { - if ( !::GetExitCodeThread(m_hThread, (LPDWORD)&rc) ) + if ( !::GetExitCodeThread(m_hThread, &rc) ) { wxLogLastError(wxT("GetExitCodeThread")); - rc = (wxThread::ExitCode)-1; + rc = THREAD_ERROR_EXIT; break; } - if ( (DWORD)rc != STILL_ACTIVE ) + if ( rc != STILL_ACTIVE ) break; // give the other thread some time to terminate, otherwise we may be @@ -791,14 +841,13 @@ wxThreadInternal::WaitForTerminate(wxCriticalSection& cs, } if ( pRc ) - *pRc = rc; + *pRc = wxUIntToPtr(rc); // we don't need the thread handle any more in any case Free(); - return rc == (wxThread::ExitCode)-1 ? wxTHREAD_MISC_ERROR - : wxTHREAD_NO_ERROR; + return rc == THREAD_ERROR_EXIT ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR; } bool wxThreadInternal::Suspend() @@ -885,10 +934,9 @@ unsigned long wxThread::GetCurrentId() return (unsigned long)::GetCurrentThreadId(); } -bool wxThread::SetConcurrency(size_t level) +bool wxThread::SetConcurrency(size_t WXUNUSED_IN_WINCE(level)) { #ifdef __WXWINCE__ - wxUnusedVar(level); return false; #else wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") ); @@ -927,7 +975,7 @@ bool wxThread::SetConcurrency(size_t level) dwProcMask |= bit; // another process added - if ( !--level ) + if ( --level == 0 ) { // and that's enough break; @@ -949,7 +997,7 @@ bool wxThread::SetConcurrency(size_t level) // set it: we can't link to SetProcessAffinityMask() because it doesn't // exist in Win9x, use RT binding instead - typedef BOOL (*SETPROCESSAFFINITYMASK)(HANDLE, DWORD); + typedef BOOL (WINAPI *SETPROCESSAFFINITYMASK)(HANDLE, DWORD_PTR); // can use static var because we're always in the main thread here static SETPROCESSAFFINITYMASK pfnSetProcessAffinityMask = NULL; @@ -1049,13 +1097,13 @@ wxThreadError wxThread::Resume() wxThread::ExitCode wxThread::Wait() { + ExitCode rc = (ExitCode)THREAD_ERROR_EXIT; + // although under Windows we can wait for any thread, it's an error to // wait for a detached one in wxWin API - wxCHECK_MSG( !IsDetached(), (ExitCode)-1, + wxCHECK_MSG( !IsDetached(), rc, _T("wxThread::Wait(): can't wait for detached thread") ); - ExitCode rc = (ExitCode)-1; - (void)m_internal->WaitForTerminate(m_critsect, &rc); return rc; @@ -1103,7 +1151,7 @@ void wxThread::Exit(ExitCode status) } #ifdef wxUSE_BEGIN_THREAD - _endthreadex((unsigned)status); + _endthreadex(wxPtrToUInt(status)); #else // !VC++ ::ExitThread((DWORD)status); #endif // VC++/!VC++ @@ -1245,7 +1293,7 @@ void wxThreadModule::OnExit() // not a mutex, so the names are a bit confusing // ---------------------------------------------------------------------------- -void WXDLLIMPEXP_BASE wxMutexGuiEnter() +void wxMutexGuiEnterImpl() { // this would dead lock everything... wxASSERT_MSG( !wxThread::IsMain(), @@ -1267,7 +1315,7 @@ void WXDLLIMPEXP_BASE wxMutexGuiEnter() gs_critsectGui->Enter(); } -void WXDLLIMPEXP_BASE wxMutexGuiLeave() +void wxMutexGuiLeaveImpl() { wxCriticalSectionLocker enter(*gs_critsectWaitingForGui); @@ -1347,4 +1395,3 @@ bool WXDLLIMPEXP_BASE wxIsWaitingForThread() #include "wx/thrimpl.cpp" #endif // wxUSE_THREADS -