func (p *Platform) getInfoString(param C.cl_platform_info) (string, error) {
var strC [2048]byte
var strN C.size_t
if err := C.clGetPlatformInfo(p.id, param, 2048, unsafe.Pointer(&strC[0]), &strN); err != C.CL_SUCCESS || strN < 1 {
return "", toError(err)
}
return string(strC[:strN-1]), nil
}
func CLGetPlatformInfo(platform CL_platform_id,
param_name CL_platform_info,
param_value_size CL_size_t,
param_value *interface{},
param_value_size_ret *CL_size_t) CL_int {
if (param_value_size == 0 || param_value == nil) && param_value_size_ret == nil {
return CL_INVALID_VALUE
} else {
var c_param_value_size_ret C.size_t
var c_errcode_ret C.cl_int
if param_value_size == 0 || param_value == nil {
c_errcode_ret = C.clGetPlatformInfo(platform.cl_platform_id,
C.cl_platform_info(param_name),
C.size_t(param_value_size),
nil,
&c_param_value_size_ret)
} else {
switch param_name {
case CL_PLATFORM_PROFILE,
CL_PLATFORM_VERSION,
CL_PLATFORM_NAME,
CL_PLATFORM_VENDOR,
CL_PLATFORM_EXTENSIONS:
value := make([]C.char, param_value_size)
c_errcode_ret = C.clGetPlatformInfo(platform.cl_platform_id,
C.cl_platform_info(param_name),
C.size_t(param_value_size),
unsafe.Pointer(&value[0]),
&c_param_value_size_ret)
*param_value = C.GoStringN(&value[0], C.int(c_param_value_size_ret-1))
default:
return CL_INVALID_VALUE
}
}
if param_value_size_ret != nil {
*param_value_size_ret = CL_size_t(c_param_value_size_ret)
}
return CL_int(c_errcode_ret)
}
}
func (p *Platform) Property(prop PlatformProperty) string {
if value, ok := p.properties[prop]; ok {
return value
}
var count C.size_t
if ret := C.clGetPlatformInfo(p.id, C.cl_platform_info(prop), 0, nil, &count); ret != C.CL_SUCCESS || count < 1 {
return ""
}
buf := make([]C.char, count)
if ret := C.clGetPlatformInfo(p.id, C.cl_platform_info(prop), count, unsafe.Pointer(&buf[0]), &count); ret != C.CL_SUCCESS || count < 1 {
return ""
}
p.properties[prop] = C.GoStringN(&buf[0], C.int(count-1))
return p.properties[prop]
}
func (pl *Platform) Info(pinfo PlatformInfo) string {
const bufSize = 4096
var bufReal C.size_t = 0
var cStr unsafe.Pointer = unsafe.Pointer(C.malloc(bufSize))
defer C.free(cStr)
C.clGetPlatformInfo(pl.item, C.cl_platform_info(pinfo), bufSize, cStr, &bufReal)
res := C.GoString((*C.char)(cStr))
return res
}
extensions []string
id C.cl_platform_id
name string
profile string
vendor string
version string
devices []*Device
}
const (
maxPlatforms = 16
maxPlatformDevices = 64
)
var getPlatformInfo = makeGetInfo(func(id interface{}, info interface{}, size C.size_t, ptr unsafe.Pointer, retSize *C.size_t) C.cl_int {
return C.clGetPlatformInfo(id.(C.cl_platform_id), info.(C.cl_platform_info), size, ptr, retSize)
})
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{
// see https://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clGetPlatformInfo.html
func GetPlatformInfo(pid PlatformID, paramName PlatformInfo, paramValueSize uint64, data unsafe.Pointer, paramValueSizeRet *uint64) ErrorCode {
return ErrorCode(C.clGetPlatformInfo(pid, C.cl_platform_info(paramName), C.size_t(paramValueSize), data, (*C.size_t)(paramValueSizeRet)))
}