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gc: implement nil chan support

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The spec has defined nil chans this way for months.
I'm behind.

R=ken2
CC=golang-dev
https://golang.org/cl/4897050
This commit is contained in:
Russ Cox 2011-08-17 15:54:17 -04:00
parent 65bde087ae
commit 3770b0e60c
9 changed files with 93 additions and 110 deletions
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8
src/pkg/reflect/value.go
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@ -1162,7 +1162,7 @@ func (iv internalValue) recv(nb bool) (val Value, ok bool) {
if ch == 0 {
panic("recv on nil channel")
}
valWord, selected, ok := chanrecv(ch, nb)
valWord, selected, ok := chanrecv(iv.typ.runtimeType(), ch, nb)
if selected {
val = valueFromIword(0, t.Elem(), valWord)
}
@ -1192,7 +1192,7 @@ func (iv internalValue) send(x Value, nb bool) (selected bool) {
if ch == 0 {
panic("send on nil channel")
}
return chansend(ch, ix.word, nb)
return chansend(iv.typ.runtimeType(), ch, ix.word, nb)
}
// Set assigns x to the value v.
@ -1720,8 +1720,8 @@ func convertForAssignment(what string, addr unsafe.Pointer, dst Type, iv interna
func chancap(ch iword) int32
func chanclose(ch iword)
func chanlen(ch iword) int32
func chanrecv(ch iword, nb bool) (val iword, selected, received bool)
func chansend(ch iword, val iword, nb bool) bool
func chanrecv(t *runtime.Type, ch iword, nb bool) (val iword, selected, received bool)
func chansend(t *runtime.Type, ch iword, val iword, nb bool) bool
func makechan(typ *runtime.Type, size uint32) (ch iword)
func makemap(t *runtime.Type) iword