Wrapping for Concurrency

Wrapping bytes.Buffer in thread-safe struct.

type Buffer struct {
    b bytes.Buffer
    m sync.Mutex
}
func (b *Buffer) Read(p []byte) (n int, err error) {
    b.m.Lock()
    defer b.m.Unlock()
    return b.b.Read(p)
}
func (b *Buffer) Write(p []byte) (n int, err error) {
    b.m.Lock()
    defer b.m.Unlock()
    return b.b.Write(p)
}
func (b *Buffer) String() string {
    b.m.Lock()
    defer b.m.Unlock()
    return b.b.String()
}