Module Name: src
Committed By: dholland
Date: Sun Feb 2 17:32:38 UTC 2014
Modified Files:
src/lib/libc/atomic: atomic_cas.3
Log Message:
Reorg second paragraph too, to group related info together.
To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/lib/libc/atomic/atomic_cas.3
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/libc/atomic/atomic_cas.3
diff -u src/lib/libc/atomic/atomic_cas.3:1.3 src/lib/libc/atomic/atomic_cas.3:1.4
--- src/lib/libc/atomic/atomic_cas.3:1.3 Sun Feb 2 17:30:06 2014
+++ src/lib/libc/atomic/atomic_cas.3 Sun Feb 2 17:32:38 2014
@@ -1,4 +1,4 @@
-.\" $NetBSD: atomic_cas.3,v 1.3 2014/02/02 17:30:06 dholland Exp $
+.\" $NetBSD: atomic_cas.3,v 1.4 2014/02/02 17:32:38 dholland Exp $
.\"
.\" Copyright (c) 2007, 2010 The NetBSD Foundation, Inc.
.\" All rights reserved.
@@ -100,15 +100,11 @@ The non-interlocked variants,
.Fn *_ni ,
guarantee atomicity within the same CPU with respect to
interrupts and preemption.
-For example, they are suitable for synchronizing compare-and-swap
-operations on a variable shared by a thread and an interrupt
-that are bound to the same CPU.
-The
-.Fn *_ni
-variants are not atomic with respect to different CPUs.
-.Fn *_ni
-variants should avoid the interprocessor synchronization overhead
-of the standard compare-and-swap operations.
+They are not atomic with respect to different CPUs.
+These can be used to avoid interprocessor synchronization overhead
+in some cases; for example, they are suitable for synchronized
+operations on a variable shared by a thread and an interrupt that are
+bound to the same CPU.
.Pp
The 64-bit variants of these functions are available only on platforms
that can support atomic 64-bit memory access.
