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internal/impl: omit isInit func when not needed

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When generating the fast-path functions for a message, group, repeated
message, or repeated group field, check to see if the field message type
requires initialization checks. If not, leave the isInit func unset.

This permits the fast-path isInitialized to skip over these fields
entirely.

Change-Id: Icb5c380077d2216c4215bb0ebc16408e905aaece
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/214179
Reviewed-by: Joe Tsai <joetsai@google.com>
This commit is contained in:
Damien Neil 2020-01-09 14:13:57 -08:00
parent 025a0d2da1
commit 7abc2def69
1 changed files with 28 additions and 16 deletions
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44
internal/impl/codec_field.go
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@ -164,7 +164,7 @@ func makeWeakMessageFieldCoder(fd pref.FieldDescriptor) pointerCoderFuncs {
func makeMessageFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs {
if mi := getMessageInfo(ft); mi != nil {
return pointerCoderFuncs{
funcs := pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {
return sizeMessageInfo(p, mi, tagsize, opts)
},
@ -174,10 +174,13 @@ func makeMessageFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCode
unmarshal: func(b []byte, p pointer, wtyp wire.Type, opts unmarshalOptions) (int, error) {
return consumeMessageInfo(b, p, mi, wtyp, opts)
},
isInit: func(p pointer) error {
return mi.isInitializedPointer(p.Elem())
},
}
if needsInitCheck(mi.Desc) {
funcs.isInit = func(p pointer) error {
return mi.isInitializedPointer(p.Elem())
}
}
return funcs
} else {
return pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {
@ -308,7 +311,7 @@ var coderGroupValue = valueCoderFuncs{
func makeGroupFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs {
num := fd.Number()
if mi := getMessageInfo(ft); mi != nil {
return pointerCoderFuncs{
funcs := pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {
return sizeGroupType(p, mi, tagsize, opts)
},
@ -318,10 +321,13 @@ func makeGroupFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderF
unmarshal: func(b []byte, p pointer, wtyp wire.Type, opts unmarshalOptions) (int, error) {
return consumeGroupType(b, p, mi, num, wtyp, opts)
},
isInit: func(p pointer) error {
return mi.isInitializedPointer(p.Elem())
},
}
if needsInitCheck(mi.Desc) {
funcs.isInit = func(p pointer) error {
return mi.isInitializedPointer(p.Elem())
}
}
return funcs
} else {
return pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {
@ -392,7 +398,7 @@ func consumeGroup(b []byte, m proto.Message, num wire.Number, wtyp wire.Type, op
func makeMessageSliceFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs {
if mi := getMessageInfo(ft); mi != nil {
return pointerCoderFuncs{
funcs := pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {
return sizeMessageSliceInfo(p, mi, tagsize, opts)
},
@ -402,10 +408,13 @@ func makeMessageSliceFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointe
unmarshal: func(b []byte, p pointer, wtyp wire.Type, opts unmarshalOptions) (int, error) {
return consumeMessageSliceInfo(b, p, mi, wtyp, opts)
},
isInit: func(p pointer) error {
return isInitMessageSliceInfo(p, mi)
},
}
if needsInitCheck(mi.Desc) {
funcs.isInit = func(p pointer) error {
return isInitMessageSliceInfo(p, mi)
}
}
return funcs
}
return pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {
@ -644,7 +653,7 @@ var coderGroupSliceValue = valueCoderFuncs{
func makeGroupSliceFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerCoderFuncs {
num := fd.Number()
if mi := getMessageInfo(ft); mi != nil {
return pointerCoderFuncs{
funcs := pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {
return sizeGroupSliceInfo(p, mi, tagsize, opts)
},
@ -654,10 +663,13 @@ func makeGroupSliceFieldCoder(fd pref.FieldDescriptor, ft reflect.Type) pointerC
unmarshal: func(b []byte, p pointer, wtyp wire.Type, opts unmarshalOptions) (int, error) {
return consumeGroupSliceInfo(b, p, num, wtyp, mi, opts)
},
isInit: func(p pointer) error {
return isInitMessageSliceInfo(p, mi)
},
}
if needsInitCheck(mi.Desc) {
funcs.isInit = func(p pointer) error {
return isInitMessageSliceInfo(p, mi)
}
}
return funcs
}
return pointerCoderFuncs{
size: func(p pointer, tagsize int, opts marshalOptions) int {