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| -rw-r--r-- | src/sync/example_pool_test.go | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/sync/example_pool_test.go b/src/sync/example_pool_test.go new file mode 100644 index 0000000000..8288d41e8c --- /dev/null +++ b/src/sync/example_pool_test.go @@ -0,0 +1,45 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package sync_test + +import ( + "bytes" + "io" + "os" + "sync" + "time" +) + +var bufPool = sync.Pool{ + New: func() interface{} { + // The Pool's New function should generally only return pointer + // types, since a pointer can be put into the return interface + // value without an allocation: + return new(bytes.Buffer) + }, +} + +// timeNow is a fake version of time.Now for tests. +func timeNow() time.Time { + return time.Unix(1136214245, 0) +} + +func Log(w io.Writer, key, val string) { + b := bufPool.Get().(*bytes.Buffer) + b.Reset() + // Replace this with time.Now() in a real logger. + b.WriteString(timeNow().UTC().Format(time.RFC3339)) + b.WriteByte(' ') + b.WriteString(key) + b.WriteByte('=') + b.WriteString(val) + w.Write(b.Bytes()) + bufPool.Put(b) +} + +func ExamplePool() { + Log(os.Stdout, "path", "/search?q=flowers") + // Output: 2006-01-02T15:04:05Z path=/search?q=flowers +} |