From 4aa891e77384e88a4e809f92fa2bc9b50f67a07c Mon Sep 17 00:00:00 2001
From: Alexander Karsakov <alexander.karsakov@itseez.com>
Date: Wed, 5 Mar 2014 17:57:06 +0400
Subject: [PATCH] Remove clReleaseDevice call (workaround for pure  virtual
 call on Windows)

---
 modules/ocl/src/cl_context.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/modules/ocl/src/cl_context.cpp b/modules/ocl/src/cl_context.cpp
index 37d6bb33b..4edf1f7ff 100644
--- a/modules/ocl/src/cl_context.cpp
+++ b/modules/ocl/src/cl_context.cpp
@@ -596,9 +596,16 @@ protected:
         CV_Assert(this != currentContext);
 
 #ifdef CL_VERSION_1_2
-        if (supportsFeature(FEATURE_CL_VER_1_2))
+#ifdef WIN32
+        // if process is on termination stage (ExitProcess was called and other threads were terminated)
+        // then disable command queue release because it may cause program hang
+        if (!__termination)
+#endif
         {
-            openCLSafeCall(clReleaseDevice(clDeviceID));
+            if (supportsFeature(FEATURE_CL_VER_1_2))
+            {
+                openCLSafeCall(clReleaseDevice(clDeviceID));
+            }
         }
 #endif
         if (deviceInfoImpl._id < 0) // not in the global registry, so we should cleanup it