Intial commit

1 files changed, 62 insertions, 0 deletions

diff --git a/hello_world.c b/hello_world.c
new file mode 100644
index 0000000..1799f77
--- /dev/null
+++ b/hello_world.c
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <CL/cl.h>
+
+#define CASE_ERR(ec) case ec: return #ec;
+
+const char * err_string(cl_int error)
+{
+   switch(error) {
+
+   CASE_ERR(CL_DEVICE_NOT_FOUND);
+   CASE_ERR(CL_INVALID_DEVICE_TYPE);
+   CASE_ERR(CL_INVALID_PLATFORM);
+   CASE_ERR(CL_INVALID_VALUE);
+   CASE_ERR(CL_OUT_OF_HOST_MEMORY);
+   CASE_ERR(CL_OUT_OF_RESOURCES);
+   CASE_ERR(CL_SUCCESS);
+
+   }
+}
+
+int main(int argc, char ** argv)
+{
+   cl_int error;
+
+   cl_uint total_platforms;
+   cl_platform_id platform_id;
+
+   cl_uint total_gpu_devices;
+   cl_device_id device_id;
+
+   error = clGetPlatformIDs(
+                           1, /* Max number of platform IDs to return */
+                           &platform_id, /* Pointer to platform_id */
+                           &total_platforms); /* Total number of platforms
+                                               * found on the system */
+
+   if (error != CL_SUCCESS) {
+      fprintf(stderr, "clGetPlatformIDs() failed: %s\n", err_string(error));
+      return EXIT_FAILURE;
+   }
+
+   fprintf(stderr, "There are %u platforms\n", total_platforms);
+
+
+
+   error = clGetDeviceIDs(platform_id,
+                          CL_DEVICE_TYPE_GPU,
+                          1,
+                          &device_id,
+                          &total_gpu_devices);
+
+   if (error != CL_SUCCESS) {
+      fprintf(stderr, "clGetDeviceIDs() failed: %s\n", err_string(error));
+      return EXIT_FAILURE;
+   }
+
+   fprintf(stderr, "There are %u GPU devices\n", total_gpu_devices);
+
+   return EXIT_SUCCESS;
+}