Porting/cherrymaint: Add comment

[perl5.git] / perlio.h

diff --git a/perlio.h b/perlio.h
index a6902d4..0575cb1 100644 (file)
--- a/perlio.h
+++ b/perlio.h
@@ -25,7 +25,7 @@
                    then there are two modes determined by USE_SFIO:
 
    USE_SFIO    - If set causes PerlIO_xxx() to be #define-d onto sfio functions.
-                 A backward compatability mode for some specialist applications.
+                 A backward compatibility mode for some specialist applications.
 
                  If USE_SFIO is not set then PerlIO_xxx() are real functions
                  defined in perlio.c which implement extra functionality
@@ -189,6 +189,11 @@ PERL_EXPORT_C void PerlIO_clone(pTHX_ PerlInterpreter *proto,
 #define BUFSIZ 1024
 #endif
 
+/* The default buffer size for the perlio buffering layer */
+#ifndef PERLIOBUF_DEFAULT_BUFSIZ
+#define PERLIOBUF_DEFAULT_BUFSIZ (BUFSIZ > 8192 ? BUFSIZ : 8192)
+#endif
+
 #ifndef SEEK_SET
 #define SEEK_SET 0
 #endif