func GetPlatforms() []Platform {
var count C.cl_uint
if ret := C.clGetPlatformIDs(0, (*C.cl_platform_id)(nil), &count); ret != C.CL_SUCCESS || count == 0 {
return nil
}
c_platforms := make([]C.cl_platform_id, count)
if ret := C.clGetPlatformIDs(count, &c_platforms[0], &count); ret != C.CL_SUCCESS || count == 0 {
return nil
}
platforms := make([]Platform, 0, count)
for _, pid := range c_platforms {
if ret := C.clGetDeviceIDs(pid, C.cl_device_type(DEVICE_TYPE_ALL), 0, (*C.cl_device_id)(nil), &count); ret != C.CL_SUCCESS || count == 0 {
continue
}
c_devices := make([]C.cl_device_id, count)
if ret := C.clGetDeviceIDs(pid, C.cl_device_type(DEVICE_TYPE_ALL), count, &c_devices[0], &count); ret != C.CL_SUCCESS || count == 0 {
continue
}
platform := Platform{
id: pid,
Devices: make([]Device, count),
properties: make(map[PlatformProperty]string),
}
for i, did := range c_devices {
platform.Devices[i].id = did
platform.Devices[i].properties = make(map[DeviceProperty]interface{})
}
platforms = append(platforms, platform)
}
return platforms
}
func CLGetDeviceIDs(platform CL_platform_id,
device_type CL_device_type,
num_entries CL_uint,
devices []CL_device_id,
num_devices *CL_uint) CL_int {
if (num_entries == 0 && devices != nil) || (num_devices == nil && devices == nil) {
return CL_INVALID_VALUE
} else {
var c_num_devices C.cl_uint
var c_errcode_ret C.cl_int
if devices == nil {
c_errcode_ret = C.clGetDeviceIDs(platform.cl_platform_id,
C.cl_device_type(device_type),
C.cl_uint(num_entries),
nil,
&c_num_devices)
} else {
devices_id := make([]C.cl_device_id, len(devices))
c_errcode_ret = C.clGetDeviceIDs(platform.cl_platform_id,
C.cl_device_type(device_type),
C.cl_uint(num_entries),
&devices_id[0],
&c_num_devices)
if c_errcode_ret == C.CL_SUCCESS {
for i := 0; i < len(devices); i++ {
devices[i].cl_device_id = devices_id[i]
}
}
}
if num_devices != nil {
*num_devices = CL_uint(c_num_devices)
}
return CL_int(c_errcode_ret)
}
}
func (pl *Platform) Devices(devType DeviceType, num uint) []Device {
devices := make([]aDevice, num)
var realNum C.cl_uint = 0
error := C.clGetDeviceIDs(pl.item, C.cl_device_type(devType), C.cl_uint(num), (*C.cl_device_id)(&devices[0]), &realNum)
res := make([]Device, realNum)
fmt.Printf("xxx %d\n", int(error))
var i C.cl_uint
for i = 0; i < realNum; i++ {
res[i].item = devices[i]
}
return res
}
func getPlatformByID(id C.cl_platform_id) (p *Platform, err error) {
var numDevices C.cl_uint
deviceIDs := [maxPlatformDevices]C.cl_device_id{}
deviceIDsPtr := (*C.cl_device_id)(unsafe.Pointer(&deviceIDs))
ret := C.clGetDeviceIDs(id, C.CL_DEVICE_TYPE_ALL, C.cl_uint(maxPlatformDevices), deviceIDsPtr, &numDevices)
if ret != 0 {
err = newError(ret)
return
}
p = &Platform{
id: id,
devices: make([]*Device, int(numDevices)),
}
var str [4096]byte
getMap := []struct {
info C.cl_platform_info
dst interface{}
hold interface{}
}{
{C.CL_PLATFORM_NAME, &p.name, &str},
{C.CL_PLATFORM_PROFILE, &p.profile, &str},
{C.CL_PLATFORM_VENDOR, &p.vendor, &str},
{C.CL_PLATFORM_VERSION, &p.version, &str},
{C.CL_PLATFORM_EXTENSIONS, &p.extensions, &str},
}
for _, v := range getMap {
if _, err = getPlatformInfo(id, v.info, v.hold, v.dst); err != nil {
return
}
}
for i := 0; i < int(numDevices); i++ {
if p.devices[i], err = getDeviceByID(deviceIDs[i]); err != nil {
break
}
}
return
}
// Obtain the list of devices available on a platform. 'platform' refers
// to the platform returned by GetPlatforms or can be nil. If platform
// is nil, the behavior is implementation-defined.
func GetDevices(platform *Platform, deviceType DeviceType) ([]*Device, error) {
var deviceIds [maxDeviceCount]C.cl_device_id
var numDevices C.cl_uint
var platformId C.cl_platform_id
if platform != nil {
platformId = platform.id
}
if err := C.clGetDeviceIDs(platformId, C.cl_device_type(deviceType), C.cl_uint(maxDeviceCount), &deviceIds[0], &numDevices); err != C.CL_SUCCESS {
return nil, toError(err)
}
if numDevices > maxDeviceCount {
numDevices = maxDeviceCount
}
devices := make([]*Device, numDevices)
for i := 0; i < int(numDevices); i++ {
devices[i] = &Device{id: deviceIds[i]}
}
return devices, nil
}
// see https://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetDeviceIDs.html
func GetDeviceIDs(pid PlatformID, deviceType DeviceType, numentries uint32, devices *DeviceId, numdevices *uint32) ErrorCode {
return ErrorCode(C.clGetDeviceIDs(pid, C.cl_device_type(deviceType), C.cl_uint(numentries), (*C.cl_device_id)(unsafe.Pointer(devices)), (*C.cl_uint)(numdevices)))
}