tailscale/syncs/mutex.go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause

//go:build !ts_mutex_debug

package syncs

import "sync"

// MutexDebugging indicates whether the "ts_mutex_debug" build tag is set
// and mutex debugging is enabled.
const MutexDebugging = false

// Mutex is an alias for sync.Mutex.
//
// It's only not a sync.Mutex when built with the ts_mutex_debug build tag.
type Mutex = sync.Mutex

// RWMutex is an alias for sync.RWMutex.
//
// It's only not a sync.RWMutex when built with the ts_mutex_debug build tag.
type RWMutex = sync.RWMutex

// RequiresMutex declares the caller assumes it has the given
// mutex held. In non-debug builds, it's a no-op and compiles to
// nothing.
func RequiresMutex(mu *Mutex) {}

func RegisterMutex(mu *Mutex, name string) {}

// ForkJoinGo is like go fn() but indicates that the goroutine
// is part of a fork-join parallelism pattern.
//
// This compiles to just "go fn()" in non-debug builds.
func ForkJoinGo(fn func()) {
	go fn()
}