Create context and command queue

1 files changed, 35 insertions, 2 deletions

diff --git a/hello_world.c b/hello_world.c
index 1799f77..a6624b4 100644
--- a/hello_world.c
+++ b/hello_world.c
@@ -9,9 +9,13 @@ const char * err_string(cl_int error)
 {
    switch(error) {
 
+   CASE_ERR(CL_DEVICE_NOT_AVAILABLE);
    CASE_ERR(CL_DEVICE_NOT_FOUND);
+   CASE_ERR(CL_INVALID_DEVICE);
    CASE_ERR(CL_INVALID_DEVICE_TYPE);
+   CASE_ERR(CL_INVALID_OPERATION);
    CASE_ERR(CL_INVALID_PLATFORM);
+   CASE_ERR(CL_INVALID_PROPERTY);
    CASE_ERR(CL_INVALID_VALUE);
    CASE_ERR(CL_OUT_OF_HOST_MEMORY);
    CASE_ERR(CL_OUT_OF_RESOURCES);
@@ -30,6 +34,10 @@ int main(int argc, char ** argv)
    cl_uint total_gpu_devices;
    cl_device_id device_id;
 
+   cl_context context;
+
+   cl_command_queue command_queue;
+
    error = clGetPlatformIDs(
                            1, /* Max number of platform IDs to return */
                            &platform_id, /* Pointer to platform_id */
@@ -41,7 +49,7 @@ int main(int argc, char ** argv)
       return EXIT_FAILURE;
    }
 
-   fprintf(stderr, "There are %u platforms\n", total_platforms);
+   fprintf(stderr, "There are %u platforms.\n", total_platforms);
 
 
 
@@ -56,7 +64,32 @@ int main(int argc, char ** argv)
       return EXIT_FAILURE;
    }
 
-   fprintf(stderr, "There are %u GPU devices\n", total_gpu_devices);
+   fprintf(stderr, "There are %u GPU devices.\n", total_gpu_devices);
+
+   context = clCreateContext(NULL, /* Properties */
+                           1, /* Number of devices */
+                           &device_id, /* Device pointer */
+                           NULL, /* Callback for reporting errors */
+                           NULL, /* User data to pass to error callback */
+                           &error); /* Error code */
+
+   if (error != CL_SUCCESS) {
+      fprintf(stderr, "clCreateContext() failed: %s\n", err_string(error));
+      return EXIT_FAILURE;
+   }
+
+   fprintf(stderr, "clCreateContext() succeeded.\n");
+
+   command_queue = clCreateCommandQueue(context,
+                                        device_id,
+                                        0, /* Command queue properties */
+                                        &error); /* Error code */
+
+   if (error != CL_SUCCESS) {
+      fprintf(stderr, "clCreateCommandQueue() failed: %s\n", err_string(error));
+      return EXIT_FAILURE;
+   }
 
+   fprintf(stderr, "clCreateCommandQueue() succeeded.\n");
    return EXIT_SUCCESS;
 }