package pserver // #cgo CFLAGS: -I ../../ // #cgo LDFLAGS: ${SRCDIR}/client/c/libpaddle_go_optimizer.a -lstdc++ -lm // #include "paddle/optimizer/optimizer.h" // #include // #include import "C" import ( "fmt" "unsafe" log "github.com/sirupsen/logrus" ) var nullPtr = unsafe.Pointer(uintptr(0)) type optimizer struct { opt *C.struct_paddle_optimizer elementType ElementType } func cArrayToSlice(p unsafe.Pointer, len int) []byte { if p == nullPtr { return nil } // create a Go clice backed by a C array, reference: // https://github.com/golang/go/wiki/cgo#turning-c-arrays-into-go-slices // // Go garbage collector will not interact with this data, need // to be freed properly. return (*[1 << 30]byte)(p)[:len:len] } func newOptimizer(paramWithConfigs ParameterWithConfig, State []byte) *optimizer { o := &optimizer{} o.elementType = paramWithConfigs.Param.ElementType p := paramWithConfigs.Param c := paramWithConfigs.Config s := State paramBufferSize := C.size_t(len(p.Content) / C.sizeof_float) log.WithFields(log.Fields{ "ElementType": p.ElementType, "ParamSize": paramBufferSize, "ConfigSize": len(c), "StateSize": len(s), }).Info("New Optimizer Created with config:") var cbuffer unsafe.Pointer cbuffer = C.malloc(paramBufferSize) C.memcpy(cbuffer, unsafe.Pointer(&p.Content[0]), paramBufferSize) var cstate unsafe.Pointer if len(s) != 0 { cstate = unsafe.Pointer(&s[0]) } o.opt = C.paddle_create_optimizer((*C.uchar)(&c[0]), C.int(len(c)), C.paddle_element_type(p.ElementType), cbuffer, C.int(paramBufferSize), (*C.char)(cstate), C.int(len(s))) return o } func (o *optimizer) GetWeights() []byte { var buffer unsafe.Pointer bufferLen := C.paddle_optimizer_get_weights(o.opt, &buffer) return cArrayToSlice(buffer, int(bufferLen)*C.sizeof_float) } func (o *optimizer) GetStates() []byte { var cbuffer *C.char cbufferLen := C.paddle_optimizer_get_state(o.opt, &cbuffer) return cArrayToSlice(unsafe.Pointer(cbuffer), int(cbufferLen)) } func (o *optimizer) UpdateParameter(g Gradient) error { if o.elementType != g.ElementType { return fmt.Errorf("Name: %s, parameter and gradient element type not match, parameter: %v, gradient: %v", g.Name, o.elementType, g.ElementType) } r := C.paddle_update_parameter(o.opt, C.paddle_element_type(g.ElementType), unsafe.Pointer(&g.Content[0]), C.int(len(g.Content))/C.sizeof_float) if r != 0 { return fmt.Errorf("optimizer update returned error code: %d", r) } return nil } func (o *optimizer) Cleanup() { if unsafe.Pointer(o.opt) != nullPtr { C.paddle_release_optimizer(o.opt) o.opt = (*C.struct_paddle_optimizer)(nullPtr) } }