X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/fe5816f08f6ca7b5b1e3c309cb8b4d874814aa25..60372b0d54379701d62edf5595a7dc25c48330e1:/src/osx/core/evtloop_cf.cpp diff --git a/src/osx/core/evtloop_cf.cpp b/src/osx/core/evtloop_cf.cpp index 94b0940ece..afe67a048c 100644 --- a/src/osx/core/evtloop_cf.cpp +++ b/src/osx/core/evtloop_cf.cpp @@ -3,7 +3,7 @@ // Purpose: wxEventLoop implementation common to both Carbon and Cocoa // Author: Vadim Zeitlin // Created: 2009-10-18 -// RCS-ID: $Id: wxhead.cpp,v 1.10 2009-06-29 10:23:04 zeitlin Exp $ +// RCS-ID: $Id$ // Copyright: (c) 2009 Vadim Zeitlin // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// @@ -29,6 +29,7 @@ #ifndef WX_PRECOMP #include "wx/log.h" + #include "wx/app.h" #endif #include "wx/evtloopsrc.h" @@ -37,6 +38,11 @@ #include "wx/osx/private.h" #include "wx/osx/core/cfref.h" +#include "wx/thread.h" + +#if wxUSE_GUI + #include "wx/nonownedwnd.h" +#endif // ============================================================================ // wxCFEventLoopSource and wxCFEventLoop implementation @@ -101,8 +107,6 @@ wxCFEventLoop::AddSourceForFD(int fd, if ( !cffd ) return NULL; - source->SetFileDescriptor(cffd.release()); - wxCFRef cfsrc(CFFileDescriptorCreateRunLoopSource(kCFAllocatorDefault, cffd, 0)); if ( !cfsrc ) @@ -111,6 +115,8 @@ wxCFEventLoop::AddSourceForFD(int fd, CFRunLoopRef cfloop = CFGetCurrentRunLoop(); CFRunLoopAddSource(cfloop, cfsrc, kCFRunLoopDefaultMode); + source->SetFileDescriptor(cffd.release()); + return source.release(); } @@ -140,3 +146,441 @@ wxCFEventLoop::AddSourceForFD(int WXUNUSED(fd), #endif // MAC_OS_X_VERSION_MAX_ALLOWED #endif // wxUSE_EVENTLOOP_SOURCE + +void wxCFEventLoop::OSXCommonModeObserverCallBack(CFRunLoopObserverRef observer, int activity, void *info) +{ + wxCFEventLoop * eventloop = static_cast(info); + if ( eventloop ) + eventloop->CommonModeObserverCallBack(observer, activity); +} + +void wxCFEventLoop::OSXDefaultModeObserverCallBack(CFRunLoopObserverRef observer, int activity, void *info) +{ + wxCFEventLoop * eventloop = static_cast(info); + if ( eventloop ) + eventloop->DefaultModeObserverCallBack(observer, activity); +} + +void wxCFEventLoop::CommonModeObserverCallBack(CFRunLoopObserverRef WXUNUSED(observer), int activity) +{ + if ( activity & kCFRunLoopBeforeTimers ) + { + // process pending wx events first as they correspond to low-level events + // which happened before, i.e. typically pending events were queued by a + // previous call to Dispatch() and if we didn't process them now the next + // call to it might enqueue them again (as happens with e.g. socket events + // which would be generated as long as there is input available on socket + // and this input is only removed from it when pending event handlers are + // executed) + + if ( wxTheApp ) + wxTheApp->ProcessPendingEvents(); + } + + if ( activity & kCFRunLoopBeforeWaiting ) + { + if ( ProcessIdle() ) + { + WakeUp(); + } + else + { +#if wxUSE_THREADS + wxMutexGuiLeaveOrEnter(); +#endif + } + } +} + +void +wxCFEventLoop::DefaultModeObserverCallBack(CFRunLoopObserverRef WXUNUSED(observer), + int WXUNUSED(activity)) +{ + /* + if ( activity & kCFRunLoopBeforeTimers ) + { + } + + if ( activity & kCFRunLoopBeforeWaiting ) + { + } + */ +} + + +wxCFEventLoop::wxCFEventLoop() +{ + m_shouldExit = false; + + m_runLoop = CFGetCurrentRunLoop(); + + CFRunLoopObserverContext ctxt; + bzero( &ctxt, sizeof(ctxt) ); + ctxt.info = this; + m_commonModeRunLoopObserver = CFRunLoopObserverCreate( kCFAllocatorDefault, kCFRunLoopBeforeTimers | kCFRunLoopBeforeWaiting , true /* repeats */, 0, + (CFRunLoopObserverCallBack) wxCFEventLoop::OSXCommonModeObserverCallBack, &ctxt ); + CFRunLoopAddObserver(m_runLoop, m_commonModeRunLoopObserver, kCFRunLoopCommonModes); + CFRelease(m_commonModeRunLoopObserver); + + m_defaultModeRunLoopObserver = CFRunLoopObserverCreate( kCFAllocatorDefault, kCFRunLoopBeforeTimers | kCFRunLoopBeforeWaiting , true /* repeats */, 0, + (CFRunLoopObserverCallBack) wxCFEventLoop::OSXDefaultModeObserverCallBack, &ctxt ); + CFRunLoopAddObserver(m_runLoop, m_defaultModeRunLoopObserver, kCFRunLoopDefaultMode); + CFRelease(m_defaultModeRunLoopObserver); +} + +wxCFEventLoop::~wxCFEventLoop() +{ + CFRunLoopRemoveObserver(m_runLoop, m_commonModeRunLoopObserver, kCFRunLoopCommonModes); + CFRunLoopRemoveObserver(m_runLoop, m_defaultModeRunLoopObserver, kCFRunLoopDefaultMode); +} + + +CFRunLoopRef wxCFEventLoop::CFGetCurrentRunLoop() const +{ + return CFRunLoopGetCurrent(); +} + +void wxCFEventLoop::WakeUp() +{ + CFRunLoopWakeUp(m_runLoop); +} + +#if wxUSE_BASE + +void wxMacWakeUp() +{ + wxEventLoopBase * const loop = wxEventLoopBase::GetActive(); + + if ( loop ) + loop->WakeUp(); +} + +#endif + +bool wxCFEventLoop::YieldFor(long eventsToProcess) +{ +#if wxUSE_THREADS + // Yielding from a non-gui thread needs to bail out, otherwise we end up + // possibly sending events in the thread too. + if ( !wxThread::IsMain() ) + { + return true; + } +#endif // wxUSE_THREADS + + m_isInsideYield = true; + m_eventsToProcessInsideYield = eventsToProcess; + +#if wxUSE_LOG + // disable log flushing from here because a call to wxYield() shouldn't + // normally result in message boxes popping up &c + wxLog::Suspend(); +#endif // wxUSE_LOG + + // process all pending events: + while ( DoProcessEvents() == 1 ) + ; + + // it's necessary to call ProcessIdle() to update the frames sizes which + // might have been changed (it also will update other things set from + // OnUpdateUI() which is a nice (and desired) side effect) + while ( ProcessIdle() ) {} + + // if there are pending events, we must process them. + if (wxTheApp) + wxTheApp->ProcessPendingEvents(); + +#if wxUSE_LOG + wxLog::Resume(); +#endif // wxUSE_LOG + m_isInsideYield = false; + + return true; +} + +// implement/override base class pure virtual +bool wxCFEventLoop::Pending() const +{ + return true; +} + +int wxCFEventLoop::DoProcessEvents() +{ + return DispatchTimeout( 0 ); +} + +bool wxCFEventLoop::Dispatch() +{ + return DoProcessEvents() != 0; +} + +int wxCFEventLoop::DispatchTimeout(unsigned long timeout) +{ + if ( !wxTheApp ) + return 0; + + int status = DoDispatchTimeout(timeout); + + switch( status ) + { + case 0: + break; + case -1: + if ( m_shouldExit ) + return 0; + + break; + case 1: + break; + } + + return status; +} + +int wxCFEventLoop::DoDispatchTimeout(unsigned long timeout) +{ + SInt32 status = CFRunLoopRunInMode(kCFRunLoopDefaultMode, timeout / 1000.0 , true); + switch( status ) + { + case kCFRunLoopRunFinished: + wxFAIL_MSG( "incorrect run loop state" ); + break; + case kCFRunLoopRunStopped: + return 0; + break; + case kCFRunLoopRunTimedOut: + return -1; + break; + case kCFRunLoopRunHandledSource: + default: + break; + } + return 1; +} + +void wxCFEventLoop::DoRun() +{ + for ( ;; ) + { + // generate and process idle events for as long as we don't + // have anything else to do + DoProcessEvents(); + + // if the "should exit" flag is set, the loop should terminate + // but not before processing any remaining messages so while + // Pending() returns true, do process them + if ( m_shouldExit ) + { + while ( DoProcessEvents() == 1 ) + ; + + break; + } + } +} + +void wxCFEventLoop::DoStop() +{ + CFRunLoopStop(CFGetCurrentRunLoop()); +} + +// enters a loop calling OnNextIteration(), Pending() and Dispatch() and +// terminating when Exit() is called +int wxCFEventLoop::Run() +{ + // event loops are not recursive, you need to create another loop! + wxCHECK_MSG( !IsRunning(), -1, wxT("can't reenter a message loop") ); + + // ProcessIdle() and ProcessEvents() below may throw so the code here should + // be exception-safe, hence we must use local objects for all actions we + // should undo + wxEventLoopActivator activate(this); + + // we must ensure that OnExit() is called even if an exception is thrown + // from inside ProcessEvents() but we must call it from Exit() in normal + // situations because it is supposed to be called synchronously, + // wxModalEventLoop depends on this (so we can't just use ON_BLOCK_EXIT or + // something similar here) +#if wxUSE_EXCEPTIONS + for ( ;; ) + { + try + { +#endif // wxUSE_EXCEPTIONS + + DoRun(); + +#if wxUSE_EXCEPTIONS + // exit the outer loop as well + break; + } + catch ( ... ) + { + try + { + if ( !wxTheApp || !wxTheApp->OnExceptionInMainLoop() ) + { + OnExit(); + break; + } + //else: continue running the event loop + } + catch ( ... ) + { + // OnException() throwed, possibly rethrowing the same + // exception again: very good, but we still need OnExit() to + // be called + OnExit(); + throw; + } + } + } +#endif // wxUSE_EXCEPTIONS + + return m_exitcode; +} + +// sets the "should exit" flag and wakes up the loop so that it terminates +// soon +void wxCFEventLoop::Exit(int rc) +{ + m_exitcode = rc; + m_shouldExit = true; + DoStop(); +} + +// TODO Move to thread_osx.cpp + +#if wxUSE_THREADS + +// ---------------------------------------------------------------------------- +// GUI Serialization copied from MSW implementation +// ---------------------------------------------------------------------------- + +// if it's false, some secondary thread is holding the GUI lock +static bool gs_bGuiOwnedByMainThread = true; + +// critical section which controls access to all GUI functions: any secondary +// thread (i.e. except the main one) must enter this crit section before doing +// any GUI calls +static wxCriticalSection *gs_critsectGui = NULL; + +// critical section which protects gs_nWaitingForGui variable +static wxCriticalSection *gs_critsectWaitingForGui = NULL; + +// number of threads waiting for GUI in wxMutexGuiEnter() +static size_t gs_nWaitingForGui = 0; + +void wxOSXThreadModuleOnInit() +{ + gs_critsectWaitingForGui = new wxCriticalSection(); + gs_critsectGui = new wxCriticalSection(); + gs_critsectGui->Enter(); +} + + +void wxOSXThreadModuleOnExit() +{ + if ( gs_critsectGui ) + { + if ( !wxGuiOwnedByMainThread() ) + { + gs_critsectGui->Enter(); + gs_bGuiOwnedByMainThread = true; + } + + gs_critsectGui->Leave(); + wxDELETE(gs_critsectGui); + } + + wxDELETE(gs_critsectWaitingForGui); +} + + +// wake up the main thread +void WXDLLIMPEXP_BASE wxWakeUpMainThread() +{ + wxMacWakeUp(); +} + +void wxMutexGuiEnterImpl() +{ + // this would dead lock everything... + wxASSERT_MSG( !wxThread::IsMain(), + wxT("main thread doesn't want to block in wxMutexGuiEnter()!") ); + + // the order in which we enter the critical sections here is crucial!! + + // set the flag telling to the main thread that we want to do some GUI + { + wxCriticalSectionLocker enter(*gs_critsectWaitingForGui); + + gs_nWaitingForGui++; + } + + wxWakeUpMainThread(); + + // now we may block here because the main thread will soon let us in + // (during the next iteration of OnIdle()) + gs_critsectGui->Enter(); +} + +void wxMutexGuiLeaveImpl() +{ + wxCriticalSectionLocker enter(*gs_critsectWaitingForGui); + + if ( wxThread::IsMain() ) + { + gs_bGuiOwnedByMainThread = false; + } + else + { + // decrement the number of threads waiting for GUI access now + wxASSERT_MSG( gs_nWaitingForGui > 0, + wxT("calling wxMutexGuiLeave() without entering it first?") ); + + gs_nWaitingForGui--; + + wxWakeUpMainThread(); + } + + gs_critsectGui->Leave(); +} + +void WXDLLIMPEXP_BASE wxMutexGuiLeaveOrEnter() +{ + wxASSERT_MSG( wxThread::IsMain(), + wxT("only main thread may call wxMutexGuiLeaveOrEnter()!") ); + + if ( !gs_critsectWaitingForGui ) + return; + + wxCriticalSectionLocker enter(*gs_critsectWaitingForGui); + + if ( gs_nWaitingForGui == 0 ) + { + // no threads are waiting for GUI - so we may acquire the lock without + // any danger (but only if we don't already have it) + if ( !wxGuiOwnedByMainThread() ) + { + gs_critsectGui->Enter(); + + gs_bGuiOwnedByMainThread = true; + } + //else: already have it, nothing to do + } + else + { + // some threads are waiting, release the GUI lock if we have it + if ( wxGuiOwnedByMainThread() ) + wxMutexGuiLeave(); + //else: some other worker thread is doing GUI + } +} + +bool WXDLLIMPEXP_BASE wxGuiOwnedByMainThread() +{ + return gs_bGuiOwnedByMainThread; +} + +#endif