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membarrier.2: Note that glibc does not provide a wrapper 

Notes: I copied .nf and .fi from futex.2, but they made no visual difference.
What do they actually do?

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Alejandro Colomar 2020-09-10 23:13:43 +02:00 committed by Michael Kerrisk
parent 9a84e3383f
commit 6da4ee9147
1 changed files with 9 additions and 0 deletions
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man2/membarrier.2
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@ -26,9 +26,15 @@
.SH NAME
membarrier \- issue memory barriers on a set of threads
.SH SYNOPSIS
.nf
.PP
.B #include <linux/membarrier.h>
.PP
.BI "int membarrier(int " cmd ", int " flags ");"
.fi
.PP
.IR Note :
There is no glibc wrapper for this system call; see NOTES.
.SH DESCRIPTION
The
.BR membarrier ()
@ -270,6 +276,9 @@ Examples where
.BR membarrier ()
can be useful include implementations
of Read-Copy-Update libraries and garbage collectors.
.PP
Glibc does not provide a wrapper for this system call; call it using
.BR syscall (2).
.SH EXAMPLES
Assuming a multithreaded application where "fast_path()" is executed
very frequently, and where "slow_path()" is executed infrequently, the