mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-29 10:36:31 +00:00
acc333c40b
When GTS is running in a container runtime which has configured CPU or memory limits or under an init system that uses cgroups to impose CPU and memory limits the values the Go runtime sees for GOMAXPROCS and GOMEMLIMIT are still based on the host resources, not the cgroup. At least for the throttling middlewares which use GOMAXPROCS to configure their queue size, this can result in GTS running with values too big compared to the resources that will actuall be available to it. This introduces 2 dependencies which can pick up resource contraints from the current cgroup and tune the Go runtime accordingly. This should result in the different queues being appropriately sized and in general more predictable performance. These dependencies are a no-op on non-Linux systems or if running in a cgroup that doesn't set a limit on CPU or memory. The automatic tuning of GOMEMLIMIT can be disabled by either explicitly setting GOMEMLIMIT yourself or by setting AUTOMEMLIMIT=off. The automatic tuning of GOMAXPROCS can similarly be counteracted by setting GOMAXPROCS yourself.
259 lines
7.7 KiB
Go
259 lines
7.7 KiB
Go
// Go support for Protocol Buffers - Google's data interchange format
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//
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// Copyright 2011 The Go Authors. All rights reserved.
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// https://github.com/golang/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Protocol buffer deep copy and merge.
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// TODO: RawMessage.
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package proto
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import (
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"fmt"
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"log"
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"reflect"
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"strings"
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)
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// Clone returns a deep copy of a protocol buffer.
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func Clone(src Message) Message {
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in := reflect.ValueOf(src)
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if in.IsNil() {
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return src
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}
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out := reflect.New(in.Type().Elem())
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dst := out.Interface().(Message)
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Merge(dst, src)
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return dst
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}
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// Merger is the interface representing objects that can merge messages of the same type.
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type Merger interface {
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// Merge merges src into this message.
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// Required and optional fields that are set in src will be set to that value in dst.
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// Elements of repeated fields will be appended.
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//
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// Merge may panic if called with a different argument type than the receiver.
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Merge(src Message)
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}
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// generatedMerger is the custom merge method that generated protos will have.
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// We must add this method since a generate Merge method will conflict with
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// many existing protos that have a Merge data field already defined.
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type generatedMerger interface {
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XXX_Merge(src Message)
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}
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// Merge merges src into dst.
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// Required and optional fields that are set in src will be set to that value in dst.
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// Elements of repeated fields will be appended.
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// Merge panics if src and dst are not the same type, or if dst is nil.
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func Merge(dst, src Message) {
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if m, ok := dst.(Merger); ok {
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m.Merge(src)
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return
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}
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in := reflect.ValueOf(src)
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out := reflect.ValueOf(dst)
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if out.IsNil() {
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panic("proto: nil destination")
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}
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if in.Type() != out.Type() {
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panic(fmt.Sprintf("proto.Merge(%T, %T) type mismatch", dst, src))
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}
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if in.IsNil() {
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return // Merge from nil src is a noop
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}
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if m, ok := dst.(generatedMerger); ok {
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m.XXX_Merge(src)
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return
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}
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mergeStruct(out.Elem(), in.Elem())
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}
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func mergeStruct(out, in reflect.Value) {
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sprop := GetProperties(in.Type())
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for i := 0; i < in.NumField(); i++ {
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f := in.Type().Field(i)
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if strings.HasPrefix(f.Name, "XXX_") {
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continue
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}
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mergeAny(out.Field(i), in.Field(i), false, sprop.Prop[i])
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}
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if emIn, ok := in.Addr().Interface().(extensionsBytes); ok {
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emOut := out.Addr().Interface().(extensionsBytes)
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bIn := emIn.GetExtensions()
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bOut := emOut.GetExtensions()
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*bOut = append(*bOut, *bIn...)
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} else if emIn, err := extendable(in.Addr().Interface()); err == nil {
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emOut, _ := extendable(out.Addr().Interface())
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mIn, muIn := emIn.extensionsRead()
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if mIn != nil {
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mOut := emOut.extensionsWrite()
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muIn.Lock()
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mergeExtension(mOut, mIn)
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muIn.Unlock()
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}
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}
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uf := in.FieldByName("XXX_unrecognized")
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if !uf.IsValid() {
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return
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}
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uin := uf.Bytes()
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if len(uin) > 0 {
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out.FieldByName("XXX_unrecognized").SetBytes(append([]byte(nil), uin...))
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}
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}
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// mergeAny performs a merge between two values of the same type.
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// viaPtr indicates whether the values were indirected through a pointer (implying proto2).
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// prop is set if this is a struct field (it may be nil).
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func mergeAny(out, in reflect.Value, viaPtr bool, prop *Properties) {
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if in.Type() == protoMessageType {
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if !in.IsNil() {
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if out.IsNil() {
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out.Set(reflect.ValueOf(Clone(in.Interface().(Message))))
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} else {
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Merge(out.Interface().(Message), in.Interface().(Message))
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}
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}
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return
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}
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switch in.Kind() {
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case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64,
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reflect.String, reflect.Uint32, reflect.Uint64:
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if !viaPtr && isProto3Zero(in) {
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return
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}
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out.Set(in)
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case reflect.Interface:
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// Probably a oneof field; copy non-nil values.
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if in.IsNil() {
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return
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}
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// Allocate destination if it is not set, or set to a different type.
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// Otherwise we will merge as normal.
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if out.IsNil() || out.Elem().Type() != in.Elem().Type() {
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out.Set(reflect.New(in.Elem().Elem().Type())) // interface -> *T -> T -> new(T)
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}
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mergeAny(out.Elem(), in.Elem(), false, nil)
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case reflect.Map:
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if in.Len() == 0 {
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return
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}
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if out.IsNil() {
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out.Set(reflect.MakeMap(in.Type()))
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}
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// For maps with value types of *T or []byte we need to deep copy each value.
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elemKind := in.Type().Elem().Kind()
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for _, key := range in.MapKeys() {
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var val reflect.Value
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switch elemKind {
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case reflect.Ptr:
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val = reflect.New(in.Type().Elem().Elem())
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mergeAny(val, in.MapIndex(key), false, nil)
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case reflect.Slice:
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val = in.MapIndex(key)
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val = reflect.ValueOf(append([]byte{}, val.Bytes()...))
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default:
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val = in.MapIndex(key)
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}
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out.SetMapIndex(key, val)
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}
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case reflect.Ptr:
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if in.IsNil() {
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return
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}
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if out.IsNil() {
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out.Set(reflect.New(in.Elem().Type()))
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}
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mergeAny(out.Elem(), in.Elem(), true, nil)
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case reflect.Slice:
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if in.IsNil() {
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return
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}
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if in.Type().Elem().Kind() == reflect.Uint8 {
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// []byte is a scalar bytes field, not a repeated field.
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// Edge case: if this is in a proto3 message, a zero length
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// bytes field is considered the zero value, and should not
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// be merged.
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if prop != nil && prop.proto3 && in.Len() == 0 {
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return
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}
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// Make a deep copy.
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// Append to []byte{} instead of []byte(nil) so that we never end up
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// with a nil result.
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out.SetBytes(append([]byte{}, in.Bytes()...))
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return
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}
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n := in.Len()
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if out.IsNil() {
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out.Set(reflect.MakeSlice(in.Type(), 0, n))
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}
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switch in.Type().Elem().Kind() {
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case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64,
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reflect.String, reflect.Uint32, reflect.Uint64:
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out.Set(reflect.AppendSlice(out, in))
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default:
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for i := 0; i < n; i++ {
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x := reflect.Indirect(reflect.New(in.Type().Elem()))
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mergeAny(x, in.Index(i), false, nil)
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out.Set(reflect.Append(out, x))
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}
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}
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case reflect.Struct:
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mergeStruct(out, in)
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default:
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// unknown type, so not a protocol buffer
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log.Printf("proto: don't know how to copy %v", in)
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}
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}
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func mergeExtension(out, in map[int32]Extension) {
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for extNum, eIn := range in {
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eOut := Extension{desc: eIn.desc}
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if eIn.value != nil {
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v := reflect.New(reflect.TypeOf(eIn.value)).Elem()
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mergeAny(v, reflect.ValueOf(eIn.value), false, nil)
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eOut.value = v.Interface()
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}
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if eIn.enc != nil {
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eOut.enc = make([]byte, len(eIn.enc))
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copy(eOut.enc, eIn.enc)
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}
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out[extNum] = eOut
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}
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}
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