func TestContext(t *testing.T) {
/* Host/device data structures */
var platform [1]cl.CL_platform_id
var device [1]cl.CL_device_id
var context cl.CL_context
var err cl.CL_int
var paramValueSize cl.CL_size_t
var ref_count interface{}
user_data := []byte("Hello, I am callback")
/* Access the first installed platform */
err = cl.CLGetPlatformIDs(1, platform[:], nil)
if err != cl.CL_SUCCESS {
t.Errorf("Couldn't find any platforms")
}
/* Access the first available device */
err = cl.CLGetDeviceIDs(platform[0], cl.CL_DEVICE_TYPE_GPU, 1, device[:], nil)
if err == cl.CL_DEVICE_NOT_FOUND {
err = cl.CLGetDeviceIDs(platform[0], cl.CL_DEVICE_TYPE_CPU, 1, device[:], nil)
}
if err != cl.CL_SUCCESS {
t.Errorf("Couldn't find any devices")
}
/* Create the context */
context = cl.CLCreateContext(nil, 1, device[:], my_contex_notify, unsafe.Pointer(&user_data), &err)
if err != cl.CL_SUCCESS {
t.Errorf("Couldn't create a context")
}
/* Determine the reference count */
err = cl.CLGetContextInfo(context, cl.CL_CONTEXT_REFERENCE_COUNT,
0, nil, ¶mValueSize)
if err != cl.CL_SUCCESS {
t.Errorf("Failed to find context %s.\n", "CL_CONTEXT_REFERENCE_COUNT")
}
err = cl.CLGetContextInfo(context, cl.CL_CONTEXT_REFERENCE_COUNT,
paramValueSize, &ref_count, nil)
if err != cl.CL_SUCCESS {
t.Errorf("Couldn't read the reference count.")
}
t.Logf("Initial reference count: %d\n", ref_count.(cl.CL_uint))
/* Update and display the reference count */
cl.CLRetainContext(context)
cl.CLGetContextInfo(context, cl.CL_CONTEXT_REFERENCE_COUNT,
paramValueSize, &ref_count, nil)
t.Logf("Reference count: %d\n", ref_count.(cl.CL_uint))
cl.CLReleaseContext(context)
cl.CLGetContextInfo(context, cl.CL_CONTEXT_REFERENCE_COUNT,
paramValueSize, &ref_count, nil)
t.Logf("Reference count: %d\n", ref_count.(cl.CL_uint))
cl.CLReleaseContext(context)
}
func (this *context) Retain() error {
if errCode := cl.CLRetainContext(this.context_id); errCode != cl.CL_SUCCESS {
return fmt.Errorf("Retain failure with errcode_ret %d: %s", errCode, cl.ERROR_CODES_STRINGS[-errCode])
}
return nil
}