aboutsummaryrefslogtreecommitdiffstats
path: root/LibOVR/Src/Kernel/OVR_Atomic.cpp
diff options
context:
space:
mode:
authorSven Gothel <[email protected]>2015-03-28 01:43:35 +0100
committerSven Gothel <[email protected]>2015-03-28 01:43:35 +0100
commit4207f9c279e832e3afcb3f5fc6cd8d84cb4cfe4c (patch)
treecf3671058d55b47ab6cb6f36f369928606137628 /LibOVR/Src/Kernel/OVR_Atomic.cpp
parentc29cd1a2fbff6282bab956ad61661ac9d48c4e6e (diff)
Bump OculusVR RIFT SDK to 0.5.0.1vanilla_0.5.0.1
Diffstat (limited to 'LibOVR/Src/Kernel/OVR_Atomic.cpp')
-rw-r--r--LibOVR/Src/Kernel/OVR_Atomic.cpp139
1 files changed, 0 insertions, 139 deletions
diff --git a/LibOVR/Src/Kernel/OVR_Atomic.cpp b/LibOVR/Src/Kernel/OVR_Atomic.cpp
deleted file mode 100644
index f7cf9a6..0000000
--- a/LibOVR/Src/Kernel/OVR_Atomic.cpp
+++ /dev/null
@@ -1,139 +0,0 @@
-/************************************************************************************
-
-Filename : OVR_Atomic.cpp
-Content : Contains atomic operations and inline fastest locking
- functionality. Will contain #ifdefs for OS efficiency.
- Have non-thread-safe implementation if not available.
-Created : September 19, 2012
-Notes :
-
-Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved.
-
-Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
-you may not use the Oculus VR Rift SDK except in compliance with the License,
-which is provided at the time of installation or download, or which
-otherwise accompanies this software in either electronic or hard copy form.
-
-You may obtain a copy of the License at
-
-http://www.oculusvr.com/licenses/LICENSE-3.2
-
-Unless required by applicable law or agreed to in writing, the Oculus VR SDK
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
-************************************************************************************/
-
-#include "OVR_Atomic.h"
-#include "OVR_Allocator.h"
-
-#ifdef OVR_ENABLE_THREADS
-
-// Include Windows 8-Metro compatible Synchronization API
-#if defined(OVR_OS_MS) && defined(NTDDI_WIN8) && (NTDDI_VERSION >= NTDDI_WIN8)
-#include <synchapi.h>
-#endif
-
-
-namespace OVR {
-
-// ***** Windows Lock implementation
-
-#if defined(OVR_OS_MS)
-
-// ***** Standard Win32 Lock implementation
-
-// Constructors
-Lock::Lock(unsigned spinCount)
-{
- #if defined(NTDDI_WIN8) && (NTDDI_VERSION >= NTDDI_WIN8)
- // On Windows 8 we use InitializeCriticalSectionEx due to Metro-Compatibility
- InitializeCriticalSectionEx(&cs, (DWORD)spinCount,
- OVR_DEBUG_SELECT(NULL, CRITICAL_SECTION_NO_DEBUG_INFO));
- #else
- ::InitializeCriticalSectionAndSpinCount(&cs, (DWORD)spinCount); // This is available with WindowsXP+.
- #endif
-}
-
-
-Lock::~Lock()
-{
- DeleteCriticalSection(&cs);
-}
-
-
-#endif
-
-
-//-------------------------------------------------------------------------------------
-// ***** SharedLock
-
-// This is a general purpose globally shared Lock implementation that should probably be
-// moved to Kernel.
-// May in theory busy spin-wait if we hit contention on first lock creation,
-// but this shouldn't matter in practice since Lock* should be cached.
-
-
-enum { LockInitMarker = 0xFFFFFFFF };
-
-Lock* SharedLock::GetLockAddRef()
-{
- int oldUseCount;
-
- do {
- oldUseCount = UseCount;
- if (oldUseCount == (int)LockInitMarker)
- continue;
-
- if (oldUseCount == 0)
- {
- // Initialize marker
- if (AtomicOps<int>::CompareAndSet_Sync(&UseCount, 0, LockInitMarker))
- {
- Construct<Lock>(Buffer);
- do { }
- while (!AtomicOps<int>::CompareAndSet_Sync(&UseCount, LockInitMarker, 1));
- return toLock();
- }
- continue;
- }
-
- } while (!AtomicOps<int>::CompareAndSet_NoSync(&UseCount, oldUseCount, oldUseCount + 1));
-
- return toLock();
-}
-
-void SharedLock::ReleaseLock(Lock* plock)
-{
- OVR_UNUSED(plock);
- OVR_ASSERT(plock == toLock());
-
- int oldUseCount;
-
- do {
- oldUseCount = UseCount;
- OVR_ASSERT(oldUseCount != (int)LockInitMarker);
-
- if (oldUseCount == 1)
- {
- // Initialize marker
- if (AtomicOps<int>::CompareAndSet_Sync(&UseCount, 1, LockInitMarker))
- {
- Destruct<Lock>(toLock());
-
- do { }
- while (!AtomicOps<int>::CompareAndSet_Sync(&UseCount, LockInitMarker, 0));
-
- return;
- }
- continue;
- }
-
- } while (!AtomicOps<int>::CompareAndSet_NoSync(&UseCount, oldUseCount, oldUseCount - 1));
-}
-
-} // OVR
-
-#endif // OVR_ENABLE_THREADS