diff options
Diffstat (limited to 'ext/IO')
| -rw-r--r-- | ext/IO/lib/IO/Handle.pm | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/ext/IO/lib/IO/Handle.pm b/ext/IO/lib/IO/Handle.pm index 81bec5a6c1..29b83165a2 100644 --- a/ext/IO/lib/IO/Handle.pm +++ b/ext/IO/lib/IO/Handle.pm @@ -20,6 +20,7 @@ IO::Handle - supply object methods for I/O handles $io->print("Some text\n"); } + # setvbuf is not available by default on Perls 5.8.0 and later. use IO::Handle '_IOLBF'; $io->setvbuf($buffer_var, _IOLBF, 1024); @@ -193,6 +194,10 @@ C<_IOLBF>, and C<_IONBF> for setvbuf()--except that the buffer parameter specifies a scalar variable to use as a buffer. You should only change the buffer before any I/O, or immediately after calling flush. +WARNING: The IO::Handle::setvbuf() is not available by default on +Perls 5.8.0 and later because setvbuf() is rather specific to using +the stdio library, while Perl prefers the new perlio subsystem instead. + WARNING: A variable used as a buffer by C<setbuf> or C<setvbuf> B<must not be modified> in any way until the IO::Handle is closed or C<setbuf> or C<setvbuf> is called again, or memory corruption may result! Remember that |