1 files changed, 62 insertions, 0 deletions
diff --git a/APEX_1.4/common/src/WriteCheck.cpp b/APEX_1.4/common/src/WriteCheck.cpp
new file mode 100644
index 00000000..af177eb1
--- /dev/null
+++ b/APEX_1.4/common/src/WriteCheck.cpp
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2008-2015, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * NVIDIA CORPORATION and its licensors retain all intellectual property
+ * and proprietary rights in and to this software, related documentation
+ * and any modifications thereto.  Any use, reproduction, disclosure or
+ * distribution of this software and related documentation without an express
+ * license agreement from NVIDIA CORPORATION is strictly prohibited.
+ */
+
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
+
+#include "WriteCheck.h"
+#include "ApexRWLockable.h"
+#include "PsThread.h"
+#include "ApexSDKIntl.h"
+
+namespace nvidia
+{
+namespace apex
+{
+
+WriteCheck::WriteCheck(ApexRWLockable* scene, const char* functionName, bool allowReentry) 
+: mLockable(scene), mName(functionName), mAllowReentry(allowReentry), mErrorCount(0)
+{
+	if (GetApexSDK()->isConcurrencyCheckEnabled() && mLockable)
+	{
+		if (!mLockable->startWrite(mAllowReentry) && !mLockable->isEnabled())
+		{
+			APEX_INTERNAL_ERROR("An API write call (%s) was made from thread %d but acquireWriteLock() was not called first, note that "
+				"when ApexSDKDesc::enableConcurrencyCheck is enabled all API reads and writes must be "
+				"wrapped in the appropriate locks.", mName, uint32_t(nvidia::Thread::getId()));
+		}
+
+		// Record the Scene read/write error counter which is
+		// incremented any time a Scene::apexStartWrite/apexStartRead fails
+		// (see destructor for additional error checking based on this count)
+		mErrorCount = mLockable->getReadWriteErrorCount();
+	}
+}
+
+
+WriteCheck::~WriteCheck()
+{
+	if (GetApexSDK()->isConcurrencyCheckEnabled() && mLockable)
+	{
+		// By checking if the NpScene::mConcurrentErrorCount has been incremented
+		// we can detect if an erroneous read/write was performed during 
+		// this objects lifetime. In this case we also print this function's
+		// details so that the user can see which two API calls overlapped
+		if (mLockable->getReadWriteErrorCount() != mErrorCount && !mLockable->isEnabled())
+		{
+			APEX_INTERNAL_ERROR("Leaving %s on thread %d, an overlapping API read or write by another thread was detected.", mName, uint32_t(nvidia::Thread::getId()));
+		}
+
+		mLockable->stopWrite(mAllowReentry);
+	}
+}
+
+}
+}
+\ No newline at end of file