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78 lines
2.0 KiB
78 lines
2.0 KiB
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package rwmutex provides switch of concurrent safety feature for sync.RWMutex.
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package rwmutex
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import (
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"sync"
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)
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// RWMutex is a sync.RWMutex with a switch for concurrent safe feature.
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// If its attribute *sync.RWMutex is not nil, it means it's in concurrent safety usage.
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// Its attribute *sync.RWMutex is nil in default, which makes this struct mush lightweight.
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type RWMutex struct {
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// Underlying mutex.
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mutex *sync.RWMutex
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}
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// New creates and returns a new *RWMutex.
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// The parameter `safe` is used to specify whether using this mutex in concurrent safety,
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// which is false in default.
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func New(safe ...bool) *RWMutex {
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mu := Create(safe...)
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return &mu
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}
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// Create creates and returns a new RWMutex object.
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// The parameter `safe` is used to specify whether using this mutex in concurrent safety,
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// which is false in default.
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func Create(safe ...bool) RWMutex {
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if len(safe) > 0 && safe[0] {
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return RWMutex{
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mutex: new(sync.RWMutex),
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}
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}
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return RWMutex{}
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}
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// IsSafe checks and returns whether current mutex is in concurrent-safe usage.
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func (mu *RWMutex) IsSafe() bool {
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return mu.mutex != nil
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}
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// Lock locks mutex for writing.
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// It does nothing if it is not in concurrent-safe usage.
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func (mu *RWMutex) Lock() {
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if mu.mutex != nil {
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mu.mutex.Lock()
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}
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}
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// Unlock unlocks mutex for writing.
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// It does nothing if it is not in concurrent-safe usage.
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func (mu *RWMutex) Unlock() {
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if mu.mutex != nil {
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mu.mutex.Unlock()
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}
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}
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// RLock locks mutex for reading.
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// It does nothing if it is not in concurrent-safe usage.
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func (mu *RWMutex) RLock() {
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if mu.mutex != nil {
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mu.mutex.RLock()
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}
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}
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// RUnlock unlocks mutex for reading.
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// It does nothing if it is not in concurrent-safe usage.
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func (mu *RWMutex) RUnlock() {
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if mu.mutex != nil {
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mu.mutex.RUnlock()
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}
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}
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