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runtime: improve sigsend documentation

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I think of "sending" a signal as calling kill, but sigsend is involved
in handling a signal and, specifically delivering it to the internal
signal queue. The term "delivery" is already used in
signalWaitUntilIdle, so this CL also uses it in the documentation for
sigsend.

Change-Id: I86e171f247f525ece884a680bace616fa9a3c7bd
Reviewed-on: https://go-review.googlesource.com/81235
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Austin Clements 2017-11-30 15:47:04 -05:00
parent 292558be02
commit aaccb3834c
1 changed files with 3 additions and 2 deletions
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5
src/runtime/sigqueue.go
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@ -61,8 +61,9 @@ const (
sigSending
)
// Called from sighandler to send a signal back out of the signal handling thread.
// Reports whether the signal was sent. If not, the caller typically crashes the program.
// sigsend delivers a signal from sighandler to the internal signal delivery queue.
// It reports whether the signal was sent. If not, the caller typically crashes the program.
// It runs from the signal handler, so it's limited in what it can do.
func sigsend(s uint32) bool {
bit := uint32(1) << uint(s&31)
if !sig.inuse || s >= uint32(32*len(sig.wanted)) {