mirror of https://github.com/go-gitea/gitea.git
68 lines
1.2 KiB
Go
68 lines
1.2 KiB
Go
// Copyright 2024 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package globallock
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import (
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"context"
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"sync"
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"time"
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)
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type memoryLocker struct {
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locks sync.Map
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}
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var _ Locker = &memoryLocker{}
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func NewMemoryLocker() Locker {
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return &memoryLocker{}
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}
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func (l *memoryLocker) Lock(ctx context.Context, key string) (ReleaseFunc, error) {
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if l.tryLock(key) {
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releaseOnce := sync.Once{}
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return func() {
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releaseOnce.Do(func() {
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l.locks.Delete(key)
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})
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}, nil
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}
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ticker := time.NewTicker(time.Millisecond * 100)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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return func() {}, ctx.Err()
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case <-ticker.C:
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if l.tryLock(key) {
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releaseOnce := sync.Once{}
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return func() {
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releaseOnce.Do(func() {
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l.locks.Delete(key)
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})
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}, nil
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}
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}
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}
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}
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func (l *memoryLocker) TryLock(_ context.Context, key string) (bool, ReleaseFunc, error) {
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if l.tryLock(key) {
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releaseOnce := sync.Once{}
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return true, func() {
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releaseOnce.Do(func() {
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l.locks.Delete(key)
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})
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}, nil
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}
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return false, func() {}, nil
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}
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func (l *memoryLocker) tryLock(key string) bool {
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_, loaded := l.locks.LoadOrStore(key, struct{}{})
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return !loaded
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}
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