Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
var ErrClosedPipe = errors.New("io: read/write on closed pipe")
ErrClosedPipe is the error used for read or write operations on a closed pipe.
Functions ¶
This section is empty.
Types ¶
type Pipe ¶
type Pipe struct {
// contains filtered or unexported fields
}
Pipe is a synchronous in-memory pipe. It can be used to connect code expecting an io.Reader with code expecting an io.Writer.
Reads and Writes on the pipe are matched one to one except when multiple Reads are needed to consume a single Write. That is, each Write to the PipeWriter blocks until it has satisfied one or more Reads from the PipeReader that fully consume the written data. The data is copied directly from the Write to the corresponding Read (or Reads); there is no internal buffering.
It is safe to call Read and Write in parallel with each other or with Close. Parallel calls to Read and parallel calls to Write are also safe: the individual calls will be gated sequentially.
func (*Pipe) CloseWrite ¶
func (*Pipe) Reader ¶
func (p *Pipe) Reader() *PipeReader
Reader returns the reading half of the pipe
func (*Pipe) Writer ¶
func (p *Pipe) Writer() *PipeWriter
Writer returns the writing half of the pipe
type PipeReader ¶
type PipeReader struct {
// contains filtered or unexported fields
}
A PipeReader is the read half of a pipe.
func (*PipeReader) Close ¶
func (r *PipeReader) Close() error
Close closes the reader; subsequent writes to the write half of the pipe will return the error ErrClosedPipe.
func (*PipeReader) CloseWithError ¶
func (r *PipeReader) CloseWithError(err error) error
CloseWithError closes the reader; subsequent writes to the write half of the pipe will return the error err.
func (*PipeReader) Read ¶
func (r *PipeReader) Read(data []byte) (n int, err error)
Read implements the standard Read interface: it reads data from the pipe, blocking until a writer arrives or the write end is closed. If the write end is closed with an error, that error is returned as err; otherwise err is EOF.
type PipeWriter ¶
type PipeWriter struct {
// contains filtered or unexported fields
}
A PipeWriter is the write half of a pipe.
func (*PipeWriter) Close ¶
func (w *PipeWriter) Close() error
Close closes the writer; subsequent reads from the read half of the pipe will return no bytes and EOF.
func (*PipeWriter) CloseWithError ¶
func (w *PipeWriter) CloseWithError(err error) error
CloseWithError closes the writer; subsequent reads from the read half of the pipe will return no bytes and the error err, or EOF if err is nil.
CloseWithError always returns nil.
func (*PipeWriter) Write ¶
func (w *PipeWriter) Write(data []byte) (n int, err error)
Write implements the standard Write interface: it writes data to the pipe, blocking until one or more readers have consumed all the data or the read end is closed. If the read end is closed with an error, that err is returned as err; otherwise err is ErrClosedPipe.
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