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2002-08-29  Ulrich Drepper  <drepper@redhat.com>

	* libio/fileops.c (_IO_new_file_fopen): Recognize new mode specifier
	'm' to enable mmap I/O.
	* libio/libio.h (_IO_FILE): Rename _blksize field to _flags2.  The
	former wasn't used (anymore?).
	(_IO_FLAGS2_MMAP): New define.
	* libio/genops.c (_IO_no_init): Initialize _flags2 field.
	* libio/iofopen.c (__fopen_maybe_mmap): Use mmap callbacks only if
	_IO_FLAGS2_MMAP bit is set.
	* libio/iofdopen.c (_IO_new_fdopen): Recognize 'm' mode specifier.
	Enable mmap-using mode only if 'm' was set.
This commit is contained in:
Ulrich Drepper
2002-08-30 07:07:16 +00:00
parent b7fc6d07af
commit dd0ee2e102
5 changed files with 47 additions and 6 deletions
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2
libio/iofopen.c
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@ -41,7 +41,7 @@ __fopen_maybe_mmap (fp)
_IO_FILE *fp;
{
#ifdef _G_HAVE_MMAP
if (fp->_flags & _IO_NO_WRITES)
if ((fp->_flags2 & _IO_FLAGS2_MMAP) && (fp->_flags & _IO_NO_WRITES))
{
/* Since this is read-only, we might be able to mmap the contents
directly. We delay the decision until the first read attempt by