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/*
* 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 rt
import (
"reflect"
"unsafe"
)
//go:noescape
//go:linkname Memmove runtime.memmove
func Memmove(to unsafe.Pointer, from unsafe.Pointer, n uintptr)
//go:linkname Mapiternext runtime.mapiternext
func Mapiternext(it *GoMapIterator)
//go:linkname Mapiterinit runtime.mapiterinit
func Mapiterinit(t *GoMapType, m *GoMap, it *GoMapIterator)
//go:linkname IsValidNumber encoding/json.isValidNumber
func IsValidNumber(s string) bool
//go:nosplit
//go:linkname MemclrHasPointers runtime.memclrHasPointers
//goland:noinspection GoUnusedParameter
func MemclrHasPointers(ptr unsafe.Pointer, n uintptr)
//go:linkname MemclrNoHeapPointers runtime.memclrNoHeapPointers
//goland:noinspection GoUnusedParameter
func MemclrNoHeapPointers(ptr unsafe.Pointer, n uintptr)
//go:linkname newarray runtime.newarray
func newarray(typ *GoType, n int) unsafe.Pointer
func add(p unsafe.Pointer, x uintptr) unsafe.Pointer {
return unsafe.Pointer(uintptr(p) + x)
}
func ClearMemory(et *GoType, ptr unsafe.Pointer, size uintptr) {
if et.PtrData == 0 {
MemclrNoHeapPointers(ptr, size)
} else {
MemclrHasPointers(ptr, size)
}
}
// runtime.maxElementSize
const _max_map_element_size uintptr = 128
func IsMapfast(vt reflect.Type) bool {
return vt.Elem().Size() <= _max_map_element_size
}
//go:linkname Mallocgc runtime.mallocgc
//goland:noinspection GoUnusedParameter
func Mallocgc(size uintptr, typ *GoType, needzero bool) unsafe.Pointer
//go:linkname Makemap reflect.makemap
func Makemap(*GoType, int) unsafe.Pointer
//go:linkname Mapassign runtime.mapassign
//goland:noinspection GoUnusedParameter
func Mapassign(t *GoMapType, h unsafe.Pointer, k unsafe.Pointer) unsafe.Pointer
//go:linkname Mapassign_fast32 runtime.mapassign_fast32
//goland:noinspection GoUnusedParameter
func Mapassign_fast32(t *GoMapType, h unsafe.Pointer, k uint32) unsafe.Pointer
//go:linkname Mapassign_fast64 runtime.mapassign_fast64
//goland:noinspection GoUnusedParameter
func Mapassign_fast64(t *GoMapType, h unsafe.Pointer, k uint64) unsafe.Pointer
//go:linkname Mapassign_faststr runtime.mapassign_faststr
//goland:noinspection GoUnusedParameter
func Mapassign_faststr(t *GoMapType, h unsafe.Pointer, s string) unsafe.Pointer
type MapStrAssign func (t *GoMapType, h unsafe.Pointer, s string) unsafe.Pointer
func GetMapStrAssign(vt reflect.Type) MapStrAssign {
if IsMapfast(vt) {
return Mapassign_faststr
} else {
return func (t *GoMapType, h unsafe.Pointer, s string) unsafe.Pointer {
return Mapassign(t, h, unsafe.Pointer(&s))
}
}
}
type Map32Assign func(t *GoMapType, h unsafe.Pointer, k uint32) unsafe.Pointer
func GetMap32Assign(vt reflect.Type) Map32Assign {
if IsMapfast(vt) {
return Mapassign_fast32
} else {
return func (t *GoMapType, h unsafe.Pointer, s uint32) unsafe.Pointer {
return Mapassign(t, h, unsafe.Pointer(&s))
}
}
}
type Map64Assign func(t *GoMapType, h unsafe.Pointer, k uint64) unsafe.Pointer
func GetMap64Assign(vt reflect.Type) Map64Assign {
if IsMapfast(vt) {
return Mapassign_fast64
} else {
return func (t *GoMapType, h unsafe.Pointer, s uint64) unsafe.Pointer {
return Mapassign(t, h, unsafe.Pointer(&s))
}
}
}
var emptyBytes = make([]byte, 0, 0)
var EmptySlice = *(*GoSlice)(unsafe.Pointer(&emptyBytes))
//go:linkname makeslice runtime.makeslice
//goland:noinspection GoUnusedParameter
func makeslice(et *GoType, len int, cap int) unsafe.Pointer
func MakeSlice(oldPtr unsafe.Pointer, et *GoType, newLen int) *GoSlice {
if newLen == 0 {
return &EmptySlice
}
if *(*unsafe.Pointer)(oldPtr) == nil {
return &GoSlice{
Ptr: makeslice(et, newLen, newLen),
Len: newLen,
Cap: newLen,
}
}
old := (*GoSlice)(oldPtr)
if old.Cap >= newLen {
old.Len = newLen
return old
}
new := GrowSlice(et, *old, newLen)
// we sould clear the memory from [oldLen:newLen]
if et.PtrData == 0 {
oldlenmem := uintptr(old.Len) * et.Size
newlenmem := uintptr(newLen) * et.Size
MemclrNoHeapPointers(add(new.Ptr, oldlenmem), newlenmem-oldlenmem)
}
new.Len = newLen
return &new
}
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