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changeset 14591:a5714f0caebd

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nonblocking: Add comment. * lib/fcntl.in.h (O_NONBLOCK): Add comment.
author Bruno Haible <bruno@clisp.org>
date Sun, 17 Apr 2011 23:16:13 +0200
parents e0d0a4052520
children cc17a319ded6
files ChangeLog lib/fcntl.in.h
diffstat 2 files changed, 8 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-04-17  Bruno Haible  <bruno@clisp.org>
+
+	nonblocking: Add comment.
+	* lib/fcntl.in.h (O_NONBLOCK): Add comment.
+
 2011-04-17  Bruno Haible  <bruno@clisp.org>
 
 	nonblocking: Add tests for sockets.
--- a/lib/fcntl.in.h
+++ b/lib/fcntl.in.h
@@ -218,6 +218,9 @@
 # define O_NONBLOCK O_NDELAY
 #endif
 
+/* If the gnulib module 'nonblocking' is in use, guarantee a working non-zero
+   value of O_NONBLOCK.  Otherwise, O_NONBLOCK is defined (above) to O_NDELAY
+   or to 0 as fallback.  */
 #if @GNULIB_NONBLOCKING@
 # if O_NONBLOCK
 #  define GNULIB_defined_O_NONBLOCK 0