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netchan: rather than 0, make -1 mean infinite, by analogy with strings.Split etc.

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It's unlikely to affect any extant code, but I wanted to make this API change
before digging in for a rewrite.

R=rsc
CC=golang-dev
https://golang.org/cl/2112041
This commit is contained in:
Rob Pike 2010-09-02 08:10:53 +10:00
parent 426275d702
commit 3d76135ee5
2 changed files with 5 additions and 4 deletions
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5
src/pkg/netchan/export.go
View File

@ -154,8 +154,9 @@ func (client *expClient) serveRecv(hdr header, count int) {
client.sendError(&hdr, err.String())
break
}
if count > 0 {
if count--; count == 0 {
// Negative count means run forever.
if count >= 0 {
if count--; count <= 0 {
break
}
}

4
src/pkg/netchan/import.go
View File

@ -114,14 +114,14 @@ func (imp *Importer) run() {
}
// Import imports a channel of the given type and specified direction.
// It is equivalent to ImportNValues with a count of 0, meaning unbounded.
// It is equivalent to ImportNValues with a count of -1, meaning unbounded.
func (imp *Importer) Import(name string, chT interface{}, dir Dir) os.Error {
return imp.ImportNValues(name, chT, dir, 0)
}
// ImportNValues imports a channel of the given type and specified direction
// and then receives or transmits up to n values on that channel. A value of
// n==0 implies an unbounded number of values. The channel to be bound to
// n==-1 implies an unbounded number of values. The channel to be bound to
// the remote site's channel is provided in the call and may be of arbitrary
// channel type.
// Despite the literal signature, the effective signature is