1 files changed, 61 insertions, 0 deletions
diff --git a/src/runtime/chan1.go b/src/runtime/chan1.go
new file mode 100644
index 000000000..000775b1e
--- /dev/null
+++ b/src/runtime/chan1.go
@@ -0,0 +1,61 @@
+// Copyright 2009 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 runtime
+
+import "unsafe"
+
+//#define	MAXALIGN	8
+
+type waitq struct {
+	first *sudog
+	last  *sudog
+}
+
+type hchan struct {
+	qcount   uint // total data in the q
+	dataqsiz uint // size of the circular q
+	buf      *byte
+	elemsize uint16
+	closed   uint32
+	elemtype *_type // element type
+	sendx    uint   // send index
+	recvx    uint   // receive index
+	recvq    waitq  // list of recv waiters
+	sendq    waitq  // list of send waiters
+	lock     mutex
+}
+
+// Buffer follows Hchan immediately in memory.
+// chanbuf(c, i) is pointer to the i'th slot in the buffer.
+// #define chanbuf(c, i) ((byte*)((c)->buf)+(uintptr)(c)->elemsize*(i))
+
+const (
+	// scase.kind
+	_CaseRecv = iota
+	_CaseSend
+	_CaseDefault
+)
+
+// Known to compiler.
+// Changes here must also be made in src/cmd/gc/select.c's selecttype.
+type scase struct {
+	elem        unsafe.Pointer // data element
+	_chan       *hchan         // chan
+	pc          uintptr        // return pc
+	kind        uint16
+	so          uint16 // vararg of selected bool
+	receivedp   *bool  // pointer to received bool (recv2)
+	releasetime int64
+}
+
+// Known to compiler.
+// Changes here must also be made in src/cmd/gc/select.c's selecttype.
+type _select struct {
+	tcase     uint16   // total count of scase[]
+	ncase     uint16   // currently filled scase[]
+	pollorder *uint16  // case poll order
+	lockorder **hchan  // channel lock order
+	scase     [1]scase // one per case (in order of appearance)
+}