add an SVM unmap test

see: KhronosGroup/OpenCL-Docs#890

samples/99_svmunmap/CMakeLists.txt

@@ -0,0 +1,6 @@
+add_opencl_sample(
+    TEST
+    NUMBER 99
+    TARGET svmunmap
+    VERSION 200
+    SOURCES main.cpp)

samples/99_svmunmap/main.cpp

@@ -0,0 +1,87 @@
+/*
+// Copyright (c) 2019-2021 Ben Ashbaugh
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+*/
+
+#include <popl/popl.hpp>
+
+#include <CL/opencl.hpp>
+
+const size_t    gwx = 1024*1024;
+
+int main(
+    int argc,
+    char** argv )
+{
+    int platformIndex = 0;
+    int deviceIndex = 0;
+
+    {
+        popl::OptionParser op("Supported Options");
+        op.add<popl::Value<int>>("p", "platform", "Platform Index", platformIndex, &platformIndex);
+        op.add<popl::Value<int>>("d", "device", "Device Index", deviceIndex, &deviceIndex);
+
+        bool printUsage = false;
+        try {
+            op.parse(argc, argv);
+        } catch (std::exception& e) {
+            fprintf(stderr, "Error: %s\n\n", e.what());
+            printUsage = true;
+        }
+
+        if (printUsage || !op.unknown_options().empty() || !op.non_option_args().empty()) {
+            fprintf(stderr,
+                "Usage: copybuffer [options]\n"
+                "%s", op.help().c_str());
+            return -1;
+        }
+    }
+
+    std::vector<cl::Platform> platforms;
+    cl::Platform::get(&platforms);
+
+    printf("Running on platform: %s\n",
+        platforms[platformIndex].getInfo<CL_PLATFORM_NAME>().c_str() );
+
+    std::vector<cl::Device> devices;
+    platforms[platformIndex].getDevices(CL_DEVICE_TYPE_ALL, &devices);
+
+    printf("Running on device: %s\n",
+        devices[deviceIndex].getInfo<CL_DEVICE_NAME>().c_str() );
+
+    cl::Context context{devices[deviceIndex]};
+    cl::CommandQueue commandQueue = cl::CommandQueue{context, devices[deviceIndex]};
+
+    void* ptr = clSVMAlloc(context(), CL_MEM_READ_WRITE, 1024, 0);
+    printf("clSVMAlloc returned %p\n", ptr);
+
+    cl_event event = nullptr;
+    cl_int errorCode = clEnqueueSVMUnmap(
+        commandQueue(),
+        ptr,
+        0,
+        nullptr,
+        &event);
+    printf("clEnqueueSVMUnmap returned %d, event is %p.\n", errorCode, event);
+    clReleaseEvent(event);
+
+    clSVMFree(context(), ptr);
+    return 0;
+}

samples/CMakeLists.txt

@@ -90,6 +90,8 @@ add_subdirectory( 06_ndrangekernelfromfile )
 
 add_subdirectory( 10_queueexperiments )
 
+add_subdirectory( 99_svmunmap )
+
 set(BUILD_EXTENSION_SAMPLES TRUE)
 if(NOT TARGET OpenCLExt)
     message(STATUS "Skipping Extension Samples - OpenCL Extension Loader is not found.")