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frugal_jit.go
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frugal_jit.go
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//go:build !go1.24 && amd64 && !windows
/*
* Copyright 2024 CloudWeGo Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package frugal
import (
"os"
"reflect"
"strconv"
"sync"
"github.com/cloudwego/frugal/internal/jit/decoder"
"github.com/cloudwego/frugal/internal/jit/encoder"
"github.com/cloudwego/frugal/internal/jit/rt"
"github.com/cloudwego/frugal/internal/jit/utils"
"github.com/cloudwego/frugal/internal/opts"
"github.com/cloudwego/gopkg/protocol/thrift"
)
var nojit bool
func init() {
if v, err := strconv.ParseBool(os.Getenv("FRUGAL_NO_JIT")); err == nil {
nojit = v
}
}
func jitEncodedSize(val interface{}) int {
return encoder.EncodedSize(val)
}
func jitEncodeObject(buf []byte, w thrift.NocopyWriter, val interface{}) (int, error) {
return encoder.EncodeObject(buf, w, val)
}
func jitDecodeObject(buf []byte, val interface{}) (int, error) {
return decoder.DecodeObject(buf, val)
}
type _Ty struct {
d int
ty *rt.GoType
}
var (
typool sync.Pool
)
func newty(ty *rt.GoType, d int) *_Ty {
if v := typool.Get(); v == nil {
return &_Ty{d, ty}
} else {
r := v.(*_Ty)
r.d, r.ty = d, ty
return r
}
}
// Pretouch compiles vt ahead-of-time to avoid JIT compilation on-the-fly, in
// order to reduce the first-hit latency.
func Pretouch(vt reflect.Type, options ...Option) error {
if nojit {
return nil
}
d := 0
o := opts.GetDefaultOptions()
/* apply all the options */
for _, fn := range options {
fn(&o)
}
/* unpack the type */
v := make(map[*rt.GoType]bool)
t := rt.Dereference(rt.UnpackType(vt))
/* add the root type */
q := utils.NewQueue()
q.Enqueue(newty(t, 1))
/* BFS the type tree */
for !q.Empty() {
ty := q.Dequeue().(*_Ty)
tv, err := decoder.Pretouch(ty.ty, o)
/* also pretouch the encoder */
if err == nil {
err = encoder.Pretouch(ty.ty, o)
}
/* mark the type as been visited */
d, v[ty.ty] = ty.d, true
typool.Put(ty)
/* check for errors */
if err != nil {
return err
}
/* check for cutoff conditions */
if !o.CanPretouch(d) {
continue
}
/* add all the not visited sub-types */
for s := range tv {
if t = rt.UnpackType(s); !v[t] {
q.Enqueue(newty(t, d+1))
}
}
}
/* completed with no errors */
return nil
}