mirror of
https://github.com/nomic-ai/gpt4all
synced 2024-11-08 07:10:32 +00:00
d3c9c47bd2
* WIP * Fix includes * Try to fix linking issues * Refinements * allow to load MPT and llama models too * cleanup, add example, add README
114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
package gpt4all
|
|
|
|
// #cgo CFLAGS: -I../../gpt4all-backend/ -I../../gpt4all-backend/llama.cpp -I./
|
|
// #cgo CXXFLAGS: -std=c++17 -I../../gpt4all-backend/ -I../../gpt4all-backend/llama.cpp -I./
|
|
// #cgo darwin LDFLAGS: -framework Accelerate
|
|
// #cgo darwin CXXFLAGS: -std=c++17
|
|
// #cgo LDFLAGS: -lgpt4all -lm -lstdc++
|
|
// void* load_mpt_model(const char *fname, int n_threads);
|
|
// void* load_llama_model(const char *fname, int n_threads);
|
|
// void* load_gptj_model(const char *fname, int n_threads);
|
|
// void gptj_model_prompt( const char *prompt, void *m, char* result, int repeat_last_n, float repeat_penalty, int n_ctx, int tokens, int top_k,
|
|
// float top_p, float temp, int n_batch,float ctx_erase);
|
|
// void gptj_free_model(void *state_ptr);
|
|
// extern unsigned char getTokenCallback(void *, char *);
|
|
import "C"
|
|
import (
|
|
"fmt"
|
|
"runtime"
|
|
"strings"
|
|
"sync"
|
|
"unsafe"
|
|
)
|
|
|
|
// The following code is https://github.com/go-skynet/go-llama.cpp with small adaptations
|
|
type Model struct {
|
|
state unsafe.Pointer
|
|
}
|
|
|
|
func New(model string, opts ...ModelOption) (*Model, error) {
|
|
ops := NewModelOptions(opts...)
|
|
var state unsafe.Pointer
|
|
|
|
switch ops.ModelType {
|
|
case LLaMAType:
|
|
state = C.load_llama_model(C.CString(model), C.int(ops.Threads))
|
|
case GPTJType:
|
|
state = C.load_gptj_model(C.CString(model), C.int(ops.Threads))
|
|
case MPTType:
|
|
state = C.load_mpt_model(C.CString(model), C.int(ops.Threads))
|
|
}
|
|
|
|
if state == nil {
|
|
return nil, fmt.Errorf("failed loading model")
|
|
}
|
|
|
|
gpt := &Model{state: state}
|
|
// set a finalizer to remove any callbacks when the struct is reclaimed by the garbage collector.
|
|
runtime.SetFinalizer(gpt, func(g *Model) {
|
|
setTokenCallback(g.state, nil)
|
|
})
|
|
|
|
return gpt, nil
|
|
}
|
|
|
|
func (l *Model) Predict(text string, opts ...PredictOption) (string, error) {
|
|
|
|
po := NewPredictOptions(opts...)
|
|
|
|
input := C.CString(text)
|
|
if po.Tokens == 0 {
|
|
po.Tokens = 99999999
|
|
}
|
|
out := make([]byte, po.Tokens)
|
|
|
|
C.gptj_model_prompt(input, l.state, (*C.char)(unsafe.Pointer(&out[0])), C.int(po.RepeatLastN), C.float(po.RepeatPenalty), C.int(po.ContextSize),
|
|
C.int(po.Tokens), C.int(po.TopK), C.float(po.TopP), C.float(po.Temperature), C.int(po.Batch), C.float(po.ContextErase))
|
|
|
|
res := C.GoString((*C.char)(unsafe.Pointer(&out[0])))
|
|
res = strings.TrimPrefix(res, " ")
|
|
res = strings.TrimPrefix(res, text)
|
|
res = strings.TrimPrefix(res, "\n")
|
|
res = strings.TrimSuffix(res, "<|endoftext|>")
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func (l *Model) Free() {
|
|
C.gptj_free_model(l.state)
|
|
}
|
|
|
|
func (l *Model) SetTokenCallback(callback func(token string) bool) {
|
|
setTokenCallback(l.state, callback)
|
|
}
|
|
|
|
var (
|
|
m sync.Mutex
|
|
callbacks = map[uintptr]func(string) bool{}
|
|
)
|
|
|
|
//export getTokenCallback
|
|
func getTokenCallback(statePtr unsafe.Pointer, token *C.char) bool {
|
|
m.Lock()
|
|
defer m.Unlock()
|
|
|
|
if callback, ok := callbacks[uintptr(statePtr)]; ok {
|
|
return callback(C.GoString(token))
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
// setCallback can be used to register a token callback for LLama. Pass in a nil callback to
|
|
// remove the callback.
|
|
func setTokenCallback(statePtr unsafe.Pointer, callback func(string) bool) {
|
|
m.Lock()
|
|
defer m.Unlock()
|
|
|
|
if callback == nil {
|
|
delete(callbacks, uintptr(statePtr))
|
|
} else {
|
|
callbacks[uintptr(statePtr)] = callback
|
|
}
|
|
}
|