diff options
Diffstat (limited to 'vendor/google.golang.org/protobuf/internal/impl/pointer_unsafe.go')
| -rw-r--r-- | vendor/google.golang.org/protobuf/internal/impl/pointer_unsafe.go | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/vendor/google.golang.org/protobuf/internal/impl/pointer_unsafe.go b/vendor/google.golang.org/protobuf/internal/impl/pointer_unsafe.go deleted file mode 100644 index 6bed45e35..000000000 --- a/vendor/google.golang.org/protobuf/internal/impl/pointer_unsafe.go +++ /dev/null @@ -1,221 +0,0 @@ -// Copyright 2018 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package impl - -import ( - "reflect" - "sync/atomic" - "unsafe" - - "google.golang.org/protobuf/internal/protolazy" -) - -const UnsafeEnabled = true - -// Pointer is an opaque pointer type. -type Pointer unsafe.Pointer - -// offset represents the offset to a struct field, accessible from a pointer. -// The offset is the byte offset to the field from the start of the struct. -type offset uintptr - -// offsetOf returns a field offset for the struct field. -func offsetOf(f reflect.StructField) offset { - return offset(f.Offset) -} - -// IsValid reports whether the offset is valid. -func (f offset) IsValid() bool { return f != invalidOffset } - -// invalidOffset is an invalid field offset. -var invalidOffset = ^offset(0) - -// zeroOffset is a noop when calling pointer.Apply. -var zeroOffset = offset(0) - -// pointer is a pointer to a message struct or field. -type pointer struct{ p unsafe.Pointer } - -// pointerOf returns p as a pointer. -func pointerOf(p Pointer) pointer { - return pointer{p: unsafe.Pointer(p)} -} - -// pointerOfValue returns v as a pointer. -func pointerOfValue(v reflect.Value) pointer { - return pointer{p: unsafe.Pointer(v.Pointer())} -} - -// pointerOfIface returns the pointer portion of an interface. -func pointerOfIface(v any) pointer { - type ifaceHeader struct { - Type unsafe.Pointer - Data unsafe.Pointer - } - return pointer{p: (*ifaceHeader)(unsafe.Pointer(&v)).Data} -} - -// IsNil reports whether the pointer is nil. -func (p pointer) IsNil() bool { - return p.p == nil -} - -// Apply adds an offset to the pointer to derive a new pointer -// to a specified field. The pointer must be valid and pointing at a struct. -func (p pointer) Apply(f offset) pointer { - if p.IsNil() { - panic("invalid nil pointer") - } - return pointer{p: unsafe.Pointer(uintptr(p.p) + uintptr(f))} -} - -// AsValueOf treats p as a pointer to an object of type t and returns the value. -// It is equivalent to reflect.ValueOf(p.AsIfaceOf(t)) -func (p pointer) AsValueOf(t reflect.Type) reflect.Value { - return reflect.NewAt(t, p.p) -} - -// AsIfaceOf treats p as a pointer to an object of type t and returns the value. -// It is equivalent to p.AsValueOf(t).Interface() -func (p pointer) AsIfaceOf(t reflect.Type) any { - // TODO: Use tricky unsafe magic to directly create ifaceHeader. - return p.AsValueOf(t).Interface() -} - -func (p pointer) Bool() *bool { return (*bool)(p.p) } -func (p pointer) BoolPtr() **bool { return (**bool)(p.p) } -func (p pointer) BoolSlice() *[]bool { return (*[]bool)(p.p) } -func (p pointer) Int32() *int32 { return (*int32)(p.p) } -func (p pointer) Int32Ptr() **int32 { return (**int32)(p.p) } -func (p pointer) Int32Slice() *[]int32 { return (*[]int32)(p.p) } -func (p pointer) Int64() *int64 { return (*int64)(p.p) } -func (p pointer) Int64Ptr() **int64 { return (**int64)(p.p) } -func (p pointer) Int64Slice() *[]int64 { return (*[]int64)(p.p) } -func (p pointer) Uint32() *uint32 { return (*uint32)(p.p) } -func (p pointer) Uint32Ptr() **uint32 { return (**uint32)(p.p) } -func (p pointer) Uint32Slice() *[]uint32 { return (*[]uint32)(p.p) } -func (p pointer) Uint64() *uint64 { return (*uint64)(p.p) } -func (p pointer) Uint64Ptr() **uint64 { return (**uint64)(p.p) } -func (p pointer) Uint64Slice() *[]uint64 { return (*[]uint64)(p.p) } -func (p pointer) Float32() *float32 { return (*float32)(p.p) } -func (p pointer) Float32Ptr() **float32 { return (**float32)(p.p) } -func (p pointer) Float32Slice() *[]float32 { return (*[]float32)(p.p) } -func (p pointer) Float64() *float64 { return (*float64)(p.p) } -func (p pointer) Float64Ptr() **float64 { return (**float64)(p.p) } -func (p pointer) Float64Slice() *[]float64 { return (*[]float64)(p.p) } -func (p pointer) String() *string { return (*string)(p.p) } -func (p pointer) StringPtr() **string { return (**string)(p.p) } -func (p pointer) StringSlice() *[]string { return (*[]string)(p.p) } -func (p pointer) Bytes() *[]byte { return (*[]byte)(p.p) } -func (p pointer) BytesPtr() **[]byte { return (**[]byte)(p.p) } -func (p pointer) BytesSlice() *[][]byte { return (*[][]byte)(p.p) } -func (p pointer) WeakFields() *weakFields { return (*weakFields)(p.p) } -func (p pointer) Extensions() *map[int32]ExtensionField { return (*map[int32]ExtensionField)(p.p) } -func (p pointer) LazyInfoPtr() **protolazy.XXX_lazyUnmarshalInfo { - return (**protolazy.XXX_lazyUnmarshalInfo)(p.p) -} - -func (p pointer) PresenceInfo() presence { - return presence{P: p.p} -} - -func (p pointer) Elem() pointer { - return pointer{p: *(*unsafe.Pointer)(p.p)} -} - -// PointerSlice loads []*T from p as a []pointer. -// The value returned is aliased with the original slice. -// This behavior differs from the implementation in pointer_reflect.go. -func (p pointer) PointerSlice() []pointer { - // Super-tricky - p should point to a []*T where T is a - // message type. We load it as []pointer. - return *(*[]pointer)(p.p) -} - -// AppendPointerSlice appends v to p, which must be a []*T. -func (p pointer) AppendPointerSlice(v pointer) { - *(*[]pointer)(p.p) = append(*(*[]pointer)(p.p), v) -} - -// SetPointer sets *p to v. -func (p pointer) SetPointer(v pointer) { - *(*unsafe.Pointer)(p.p) = (unsafe.Pointer)(v.p) -} - -func (p pointer) growBoolSlice(addCap int) { - sp := p.BoolSlice() - s := make([]bool, 0, addCap+len(*sp)) - s = s[:len(*sp)] - copy(s, *sp) - *sp = s -} - -func (p pointer) growInt32Slice(addCap int) { - sp := p.Int32Slice() - s := make([]int32, 0, addCap+len(*sp)) - s = s[:len(*sp)] - copy(s, *sp) - *sp = s -} - -func (p pointer) growUint32Slice(addCap int) { - p.growInt32Slice(addCap) -} - -func (p pointer) growFloat32Slice(addCap int) { - p.growInt32Slice(addCap) -} - -func (p pointer) growInt64Slice(addCap int) { - sp := p.Int64Slice() - s := make([]int64, 0, addCap+len(*sp)) - s = s[:len(*sp)] - copy(s, *sp) - *sp = s -} - -func (p pointer) growUint64Slice(addCap int) { - p.growInt64Slice(addCap) -} - -func (p pointer) growFloat64Slice(addCap int) { - p.growInt64Slice(addCap) -} - -// Static check that MessageState does not exceed the size of a pointer. -const _ = uint(unsafe.Sizeof(unsafe.Pointer(nil)) - unsafe.Sizeof(MessageState{})) - -func (Export) MessageStateOf(p Pointer) *messageState { - // Super-tricky - see documentation on MessageState. - return (*messageState)(unsafe.Pointer(p)) -} -func (ms *messageState) pointer() pointer { - // Super-tricky - see documentation on MessageState. - return pointer{p: unsafe.Pointer(ms)} -} -func (ms *messageState) messageInfo() *MessageInfo { - mi := ms.LoadMessageInfo() - if mi == nil { - panic("invalid nil message info; this suggests memory corruption due to a race or shallow copy on the message struct") - } - return mi -} -func (ms *messageState) LoadMessageInfo() *MessageInfo { - return (*MessageInfo)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&ms.atomicMessageInfo)))) -} -func (ms *messageState) StoreMessageInfo(mi *MessageInfo) { - atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&ms.atomicMessageInfo)), unsafe.Pointer(mi)) -} - -type atomicNilMessage struct{ p unsafe.Pointer } // p is a *messageReflectWrapper - -func (m *atomicNilMessage) Init(mi *MessageInfo) *messageReflectWrapper { - if p := atomic.LoadPointer(&m.p); p != nil { - return (*messageReflectWrapper)(p) - } - w := &messageReflectWrapper{mi: mi} - atomic.CompareAndSwapPointer(&m.p, nil, (unsafe.Pointer)(w)) - return (*messageReflectWrapper)(atomic.LoadPointer(&m.p)) -} |