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3 Commits

Author SHA1 Message Date
Gustavo Niemeyer
17bfa32fde sync: always wake up previously sleeping goroutines on Cond.Signal 
This changes the internal implementation of Cond so that
it uses two generations of waiters.  This enables Signal
to guarantee that it will only wake up waiters that are
currently sleeping at the call time.

Fixes #1648.

R=dvyukov, gustavo, rsc
CC=golang-dev
https://golang.org/cl/4524083
 2011-06-01 20:30:42 -03:00
Russ Cox
12b7875bf2 sync: use sync/atomic 
Remove references to custom assembly routines.

R=r, r2
CC=golang-dev
https://golang.org/cl/4241043
 2011-02-25 14:29:47 -05:00
Gustavo Niemeyer
05b1dbd0a6 sync: add Cond 
R=rsc, rog, r
CC=golang-dev
https://golang.org/cl/3775048
 2011-02-16 14:11:07 -05:00