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(Merge 3.1) Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X

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to get around a mmap bug with sparse files. Patch written by Steffen Daode
Nurpmeso.
This commit is contained in:
Victor Stinner 2011-05-02 01:11:33 +02:00
commit 8108e96bc8
4 changed files with 17 additions and 1 deletions
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9
Modules/mmapmodule.c
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@ -23,6 +23,9 @@
#ifndef MS_WINDOWS
#define UNIX
# ifdef __APPLE__
# include <fcntl.h>
# endif
#endif
#ifdef MS_WINDOWS
@ -1122,6 +1125,12 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
"mmap invalid access parameter.");
}
#ifdef __APPLE__
/* Issue #11277: fsync(2) is not enough on OS X - a special, OS X specific
fcntl(2) is necessary to force DISKSYNC and get around mmap(2) bug */
if (fd != -1)
(void)fcntl(fd, F_FULLFSYNC);
#endif
#ifdef HAVE_FSTAT
# ifdef __VMS
/* on OpenVMS we must ensure that all bytes are written to the file */