66 lines
2.0 KiB
Go
66 lines
2.0 KiB
Go
// Mgmt
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// Copyright (C) 2013-2024+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program 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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// This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// Additional permission under GNU GPL version 3 section 7
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//
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// If you modify this program, or any covered work, by linking or combining it
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// with embedded mcl code and modules (and that the embedded mcl code and
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// modules which link with this program, contain a copy of their source code in
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// the authoritative form) containing parts covered by the terms of any other
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// license, the licensors of this program grant you additional permission to
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// convey the resulting work. Furthermore, the licensors of this program grant
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// the original author, James Shubin, additional permission to update this
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// additional permission if he deems it necessary to achieve the goals of this
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// additional permission.
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//go:build !root
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package util
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import (
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"fmt"
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"os"
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"time"
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)
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func ExampleFlock() {
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lockFile := "/tmp/flock.lock"
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fmt.Printf("hello\n")
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defer fmt.Printf("goodbye\n")
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defer os.Remove(lockFile)
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m := NewFlock(lockFile)
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unlock, err := m.TryLock()
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if err != nil {
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fmt.Printf("err: %+v\n", err)
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return
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}
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if unlock == nil {
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fmt.Printf("already locked\n")
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return
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}
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fmt.Printf("locked...\n")
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time.Sleep(1 * time.Second)
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unlock()
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fmt.Printf("unlocked...\n")
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// Output: hello
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// locked...
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// unlocked...
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// goodbye
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}
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