1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/LibOVR/Src/Kernel/OVR_System.cpp	Wed Jan 14 06:51:16 2015 +0200
     1.3 @@ -0,0 +1,149 @@
     1.4 +/************************************************************************************
     1.5 +
     1.6 +Filename    :   OVR_System.cpp
     1.7 +Content     :   General kernel initialization/cleanup, including that
     1.8 +                of the memory allocator.
     1.9 +Created     :   September 19, 2012
    1.10 +Notes       : 
    1.11 +
    1.12 +Copyright   :   Copyright 2014 Oculus VR, LLC All Rights reserved.
    1.13 +
    1.14 +Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License"); 
    1.15 +you may not use the Oculus VR Rift SDK except in compliance with the License, 
    1.16 +which is provided at the time of installation or download, or which 
    1.17 +otherwise accompanies this software in either electronic or hard copy form.
    1.18 +
    1.19 +You may obtain a copy of the License at
    1.20 +
    1.21 +http://www.oculusvr.com/licenses/LICENSE-3.2 
    1.22 +
    1.23 +Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
    1.24 +distributed under the License is distributed on an "AS IS" BASIS,
    1.25 +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    1.26 +See the License for the specific language governing permissions and
    1.27 +limitations under the License.
    1.28 +
    1.29 +************************************************************************************/
    1.30 +
    1.31 +#include "OVR_System.h"
    1.32 +#include "OVR_Threads.h"
    1.33 +#include "OVR_Timer.h"
    1.34 +#include "../Displays/OVR_Display.h"
    1.35 +#ifdef OVR_OS_WIN32
    1.36 +#include "../Displays/OVR_Win32_ShimFunctions.h"
    1.37 +#endif
    1.38 +
    1.39 +namespace OVR {
    1.40 +
    1.41 +#ifdef OVR_OS_WIN32
    1.42 +extern bool anyRiftsInExtendedMode();
    1.43 +#endif
    1.44 +
    1.45 +// Stack of destroy listeners (push/pop semantics)
    1.46 +static SystemSingletonInternal *SystemShutdownListenerStack = 0;
    1.47 +static Lock stackLock;
    1.48 +static bool DisplayShimInitialized = false;
    1.49 +
    1.50 +void SystemSingletonInternal::PushDestroyCallbacks()
    1.51 +{
    1.52 +    Lock::Locker locker(&stackLock);
    1.53 +
    1.54 +    // Push listener onto the stack
    1.55 +    NextSingleton = SystemShutdownListenerStack;
    1.56 +    SystemShutdownListenerStack = this;
    1.57 +}
    1.58 +
    1.59 +void System::DirectDisplayInitialize()
    1.60 +{
    1.61 +#ifdef OVR_OS_WIN32
    1.62 +	// Set up display code for Windows
    1.63 +	Win32::DisplayShim::GetInstance();
    1.64 +
    1.65 +	// This code will look for the first display. If it's a display
    1.66 +	// that's extending the destkop, the code will assume we're in
    1.67 +	// compatibility mode. Compatibility mode prevents shim loading
    1.68 +	// and renders only to extended Rifts.
    1.69 +	// If we find a display and it's application exclusive,
    1.70 +	// we load the shim so we can render to it.
    1.71 +	// If no display is available, we revert to whatever the
    1.72 +	// driver tells us we're in
    1.73 +
    1.74 +	bool anyExtendedRifts = anyRiftsInExtendedMode() || Display::InCompatibilityMode( false );
    1.75 +	
    1.76 +    DisplayShimInitialized = Win32::DisplayShim::GetInstance().Initialize(anyExtendedRifts);
    1.77 +#endif
    1.78 +}
    1.79 +
    1.80 +bool System::DirectDisplayEnabled()
    1.81 +{
    1.82 +    return DisplayShimInitialized;
    1.83 +}
    1.84 +
    1.85 +// Initializes System core, installing allocator.
    1.86 +void System::Init(Log* log, Allocator *palloc)
    1.87 +{    
    1.88 +    if (!Allocator::GetInstance())
    1.89 +    {
    1.90 +        Log::SetGlobalLog(log);
    1.91 +        Timer::initializeTimerSystem();
    1.92 +        Allocator::setInstance(palloc);
    1.93 +		Display::Initialize();
    1.94 +		DirectDisplayInitialize();
    1.95 +    }
    1.96 +    else
    1.97 +    {
    1.98 +        OVR_DEBUG_LOG(("System::Init failed - duplicate call."));
    1.99 +    }
   1.100 +}
   1.101 +
   1.102 +void System::Destroy()
   1.103 +{    
   1.104 +    if (Allocator::GetInstance())
   1.105 +    {
   1.106 +#ifdef OVR_OS_WIN32
   1.107 +		Win32::DisplayShim::GetInstance().Shutdown();
   1.108 +#endif
   1.109 +
   1.110 +		// Invoke all of the post-finish callbacks (normal case)
   1.111 +        for (SystemSingletonInternal *listener = SystemShutdownListenerStack; listener; listener = listener->NextSingleton)
   1.112 +		{
   1.113 +			listener->OnThreadDestroy();
   1.114 +		}
   1.115 +
   1.116 +#ifdef OVR_ENABLE_THREADS
   1.117 +		// Wait for all threads to finish; this must be done so that memory
   1.118 +		// allocator and all destructors finalize correctly.
   1.119 +		Thread::FinishAllThreads();
   1.120 +#endif
   1.121 +
   1.122 +		// Invoke all of the post-finish callbacks (normal case)
   1.123 +        for (SystemSingletonInternal *next, *listener = SystemShutdownListenerStack; listener; listener = next)
   1.124 +		{
   1.125 +            next = listener->NextSingleton;
   1.126 +
   1.127 +			listener->OnSystemDestroy();
   1.128 +		}
   1.129 +
   1.130 +        SystemShutdownListenerStack = 0;
   1.131 +
   1.132 +		// Shutdown heap and destroy SysAlloc singleton, if any.
   1.133 +        Allocator::GetInstance()->onSystemShutdown();
   1.134 +        Allocator::setInstance(0);
   1.135 +
   1.136 +        Timer::shutdownTimerSystem();
   1.137 +        Log::SetGlobalLog(Log::GetDefaultLog());
   1.138 +    }
   1.139 +    else
   1.140 +    {
   1.141 +        OVR_DEBUG_LOG(("System::Destroy failed - System not initialized."));
   1.142 +    }
   1.143 +}
   1.144 +
   1.145 +// Returns 'true' if system was properly initialized.
   1.146 +bool System::IsInitialized()
   1.147 +{
   1.148 +    return Allocator::GetInstance() != 0;
   1.149 +}
   1.150 +
   1.151 +
   1.152 +} // namespace OVR