runtime,reflect: merge select* const into internal/abi

For golang#59670

Change-Id: I48a6fca4154591bef8df4364230295e826bd8730

src/internal/abi/type.go

@@ -729,6 +729,16 @@ const (
 	TraceArgsMaxLen = (TraceArgsMaxDepth*3+2)*TraceArgsLimit + 1
 )
 
+// A SelectDir describes the communication direction of a select case.
+type SelectDir int
+
+const (
+	_             SelectDir = iota
+	SelectSend              // case Chan <- Send
+	SelectRecv              // case <-Chan:
+	SelectDefault           // default
+)
+
 // Populate the data.
 // The data is a stream of bytes, which contains the offsets and sizes of the
 // non-aggregate arguments or non-aggregate fields/elements of aggregate-typed

src/reflect/value.go

@@ -3038,15 +3038,15 @@ type runtimeSelect struct {
 func rselect([]runtimeSelect) (chosen int, recvOK bool)
 
 // A SelectDir describes the communication direction of a select case.
-type SelectDir int
+type SelectDir = abi.SelectDir
 
 // NOTE: These values must match ../runtime/select.go:/selectDir.
 
 const (
 	_             SelectDir = iota
-	SelectSend              // case Chan <- Send
-	SelectRecv              // case <-Chan:
-	SelectDefault           // default
+	SelectSend              = abi.SelectSend    // case Chan <- Send
+	SelectRecv              = abi.SelectRecv    // case <-Chan:
+	SelectDefault           = abi.SelectDefault // default
 )
 
 // A SelectCase describes a single case in a select operation.

src/runtime/select.go

@@ -522,22 +522,12 @@ func (c *hchan) sortkey() uintptr {
 // A runtimeSelect is a single case passed to rselect.
 // This must match ../reflect/value.go:/runtimeSelect
 type runtimeSelect struct {
-	dir selectDir
+	dir abi.SelectDir
 	typ unsafe.Pointer // channel type (not used here)
 	ch  *hchan         // channel
 	val unsafe.Pointer // ptr to data (SendDir) or ptr to receive buffer (RecvDir)
 }
 
-// These values must match ../reflect/value.go:/SelectDir.
-type selectDir int
-
-const (
-	_             selectDir = iota
-	selectSend              // case Chan <- Send
-	selectRecv              // case <-Chan:
-	selectDefault           // default
-)
-
 //go:linkname reflect_rselect reflect.rselect
 func reflect_rselect(cases []runtimeSelect) (int, bool) {
 	if len(cases) == 0 {
@@ -550,13 +540,13 @@ func reflect_rselect(cases []runtimeSelect) (int, bool) {
 	for i, rc := range cases {
 		var j int
 		switch rc.dir {
-		case selectDefault:
+		case abi.SelectDefault:
 			dflt = i
 			continue
-		case selectSend:
+		case abi.SelectSend:
 			j = nsends
 			nsends++
-		case selectRecv:
+		case abi.SelectRecv:
 			nrecvs++
 			j = len(cases) - nrecvs
 		}