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58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
// Copyright 2021 Hanzo AI Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build unix
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package testutil
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import (
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"fmt"
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"os"
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"testing"
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"github.com/stretchr/testify/require"
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"golang.org/x/sys/unix"
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)
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// flock wraps flock syscall with a retry mechanism.
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func flock(tb testing.TB, f *os.File, op string) {
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var how int
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switch op {
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case "shared":
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how = unix.LOCK_SH
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case "exclusive":
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how = unix.LOCK_EX
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case "unlock":
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how = unix.LOCK_UN
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default:
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panic(fmt.Errorf("unknown flock operation: %s", op))
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}
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for {
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err := unix.Flock(int(f.Fd()), how)
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if err == nil {
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return
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}
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tb.Logf("%s flock: %s %s %s (%#v)", tb.Name(), op, f.Name(), err, err)
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if err == unix.EINTR {
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continue
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}
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require.NoError(tb, err, "%s %s", op, f.Name())
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}
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}
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