You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
3.4 KiB
143 lines
3.4 KiB
/*
|
|
* Copyright 2021 ByteDance Inc.
|
|
*
|
|
* 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 decoder
|
|
|
|
import (
|
|
`sync`
|
|
`unsafe`
|
|
|
|
`github.com/bytedance/sonic/internal/caching`
|
|
`github.com/bytedance/sonic/internal/native/types`
|
|
`github.com/bytedance/sonic/internal/rt`
|
|
)
|
|
|
|
const (
|
|
_MinSlice = 2
|
|
_MaxStack = 4096 // 4k slots
|
|
_MaxStackBytes = _MaxStack * _PtrBytes
|
|
_MaxDigitNums = 800 // used in atof fallback algorithm
|
|
)
|
|
|
|
const (
|
|
_PtrBytes = _PTR_SIZE / 8
|
|
_FsmOffset = (_MaxStack + 1) * _PtrBytes
|
|
_DbufOffset = _FsmOffset + int64(unsafe.Sizeof(types.StateMachine{})) + types.MAX_RECURSE * _PtrBytes
|
|
_StackSize = unsafe.Sizeof(_Stack{})
|
|
)
|
|
|
|
var (
|
|
stackPool = sync.Pool{}
|
|
valueCache = []unsafe.Pointer(nil)
|
|
fieldCache = []*caching.FieldMap(nil)
|
|
fieldCacheMux = sync.Mutex{}
|
|
programCache = caching.CreateProgramCache()
|
|
)
|
|
|
|
type _Stack struct {
|
|
sp uintptr
|
|
sb [_MaxStack]unsafe.Pointer
|
|
mm types.StateMachine
|
|
vp [types.MAX_RECURSE]unsafe.Pointer
|
|
dp [_MaxDigitNums]byte
|
|
}
|
|
|
|
type _Decoder func(
|
|
s string,
|
|
i int,
|
|
vp unsafe.Pointer,
|
|
sb *_Stack,
|
|
fv uint64,
|
|
sv string, // DO NOT pass value to this arguement, since it is only used for local _VAR_sv
|
|
vk unsafe.Pointer, // DO NOT pass value to this arguement, since it is only used for local _VAR_vk
|
|
) (int, error)
|
|
|
|
var _KeepAlive struct {
|
|
s string
|
|
i int
|
|
vp unsafe.Pointer
|
|
sb *_Stack
|
|
fv uint64
|
|
sv string
|
|
vk unsafe.Pointer
|
|
|
|
ret int
|
|
err error
|
|
|
|
frame_decoder [_FP_offs]byte
|
|
frame_generic [_VD_offs]byte
|
|
}
|
|
|
|
var (
|
|
argPtrs = []bool{true, false, false, true, true, false, true, false, true}
|
|
localPtrs = []bool{}
|
|
)
|
|
|
|
var (
|
|
argPtrs_generic = []bool{true}
|
|
localPtrs_generic = []bool{}
|
|
)
|
|
|
|
func newStack() *_Stack {
|
|
if ret := stackPool.Get(); ret == nil {
|
|
return new(_Stack)
|
|
} else {
|
|
return ret.(*_Stack)
|
|
}
|
|
}
|
|
|
|
func resetStack(p *_Stack) {
|
|
memclrNoHeapPointers(unsafe.Pointer(p), _StackSize)
|
|
}
|
|
|
|
func freeStack(p *_Stack) {
|
|
p.sp = 0
|
|
stackPool.Put(p)
|
|
}
|
|
|
|
func freezeValue(v unsafe.Pointer) uintptr {
|
|
valueCache = append(valueCache, v)
|
|
return uintptr(v)
|
|
}
|
|
|
|
func freezeFields(v *caching.FieldMap) int64 {
|
|
fieldCacheMux.Lock()
|
|
fieldCache = append(fieldCache, v)
|
|
fieldCacheMux.Unlock()
|
|
return referenceFields(v)
|
|
}
|
|
|
|
func referenceFields(v *caching.FieldMap) int64 {
|
|
return int64(uintptr(unsafe.Pointer(v)))
|
|
}
|
|
|
|
func makeDecoder(vt *rt.GoType, _ ...interface{}) (interface{}, error) {
|
|
if pp, err := newCompiler().compile(vt.Pack()); err != nil {
|
|
return nil, err
|
|
} else {
|
|
return newAssembler(pp).Load(), nil
|
|
}
|
|
}
|
|
|
|
func findOrCompile(vt *rt.GoType) (_Decoder, error) {
|
|
if val := programCache.Get(vt); val != nil {
|
|
return val.(_Decoder), nil
|
|
} else if ret, err := programCache.Compute(vt, makeDecoder); err == nil {
|
|
return ret.(_Decoder), nil
|
|
} else {
|
|
return nil, err
|
|
}
|
|
} |