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61 lines
1.3 KiB
61 lines
1.3 KiB
// 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 cache |
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import "sync" |
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type pending struct { |
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lock sync.Mutex |
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path map[string]chan struct{} |
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} |
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func newPending() *pending { |
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return &pending{path: make(map[string]chan struct{})} |
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} |
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func (p *pending) add(path string) bool { |
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p.lock.Lock() |
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defer p.lock.Unlock() |
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if _, ok := p.path[path]; ok { |
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return false |
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} |
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p.path[path] = make(chan struct{}) |
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return true |
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} |
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func (p *pending) wait(path string) { |
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p.lock.Lock() |
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ch, ok := p.path[path] |
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p.lock.Unlock() |
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if ok { |
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<-ch |
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} |
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} |
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func (p *pending) done(path string) { |
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p.lock.Lock() |
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defer p.lock.Unlock() |
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defer close(p.path[path]) |
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delete(p.path, path) |
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}
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