net: add Pipe

R=r
CC=golang-dev
http://codereview.appspot.com/1004043

1 files changed, 62 insertions, 0 deletions

diff --git a/src/pkg/net/pipe.go b/src/pkg/net/pipe.go
new file mode 100644
index 000000000..c0bbd356b
--- /dev/null
+++ b/src/pkg/net/pipe.go
@@ -0,0 +1,62 @@
+package net
+
+import (
+	"io"
+	"os"
+)
+
+// Pipe creates a synchronous, in-memory, full duplex
+// network connection; both ends implement the Conn interface.
+// Reads on one end are matched with writes on the other,
+// copying data directly between the two; there is no internal
+// buffering.
+func Pipe() (Conn, Conn) {
+	r1, w1 := io.Pipe()
+	r2, w2 := io.Pipe()
+
+	return &pipe{r1, w2}, &pipe{r2, w1}
+}
+
+type pipe struct {
+	*io.PipeReader
+	*io.PipeWriter
+}
+
+type pipeAddr int
+
+func (pipeAddr) Network() string {
+	return "pipe"
+}
+
+func (pipeAddr) String() string {
+	return "pipe"
+}
+
+func (p *pipe) Close() os.Error {
+	err := p.PipeReader.Close()
+	err1 := p.PipeWriter.Close()
+	if err == nil {
+		err = err1
+	}
+	return err
+}
+
+func (p *pipe) LocalAddr() Addr {
+	return pipeAddr(0)
+}
+
+func (p *pipe) RemoteAddr() Addr {
+	return pipeAddr(0)
+}
+
+func (p *pipe) SetTimeout(nsec int64) os.Error {
+	return os.NewError("net.Pipe does not support timeouts")
+}
+
+func (p *pipe) SetReadTimeout(nsec int64) os.Error {
+	return os.NewError("net.Pipe does not support timeouts")
+}
+
+func (p *pipe) SetWriteTimeout(nsec int64) os.Error {
+	return os.NewError("net.Pipe does not support timeouts")
+}