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Diffstat (limited to 'manual/llio.texi')
| -rw-r--r-- | manual/llio.texi | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/manual/llio.texi b/manual/llio.texi index e9b5573ddd..4ac6c5fa4f 100644 --- a/manual/llio.texi +++ b/manual/llio.texi @@ -1542,19 +1542,28 @@ empty set. @comment BSD @deftypefn Macro void FD_SET (int @var{filedes}, fd_set *@var{set}) This macro adds @var{filedes} to the file descriptor set @var{set}. + +The @var{filedes} parameter must not have side effects since it is +evaluated more than once. @end deftypefn @comment sys/types.h @comment BSD @deftypefn Macro void FD_CLR (int @var{filedes}, fd_set *@var{set}) This macro removes @var{filedes} from the file descriptor set @var{set}. + +The @var{filedes} parameter must not have side effects since it is +evaluated more than once. @end deftypefn @comment sys/types.h @comment BSD -@deftypefn Macro int FD_ISSET (int @var{filedes}, fd_set *@var{set}) +@deftypefn Macro int FD_ISSET (int @var{filedes}, const fd_set *@var{set}) This macro returns a nonzero value (true) if @var{filedes} is a member of the file descriptor set @var{set}, and zero (false) otherwise. + +The @var{filedes} parameter must not have side effects since it is +evaluated more than once. @end deftypefn Next, here is the description of the @code{select} function itself. |