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https://github.com/ProtonMail/proton-bridge.git
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f3c69faf8b
* Renaming GUI, CLI, no-impact config. * License header and documentation rebranding. * Rename app title and vendor. Impact: manual install * Migrating mac keychain and launch on startup. * Fix linter and linter renaming
54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
// Copyright (c) 2022 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Proton Mail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package semaphore
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import "sync"
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type Semaphore struct {
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ch chan struct{}
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wg sync.WaitGroup
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}
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func New(max int) Semaphore {
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return Semaphore{ch: make(chan struct{}, max)}
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}
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func (sem *Semaphore) Lock() {
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sem.ch <- struct{}{}
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}
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func (sem *Semaphore) Unlock() {
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<-sem.ch
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}
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func (sem *Semaphore) Go(fn func()) {
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sem.Lock()
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sem.wg.Add(1)
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go func() {
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defer sem.Unlock()
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defer sem.wg.Done()
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fn()
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}()
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}
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func (sem *Semaphore) Wait() {
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sem.wg.Wait()
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}
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