[vlc-devel] commit: mmap: Only use MAP_NOCACHE on platforms that support it. ( Derk-Jan Hartman )

[git version control]

vlc | branch: master | Derk-Jan Hartman <hartman at videolan.org> | Fri Oct 10 14:15:37 2008 +0200| [8dcf947d585d89db6e6b879cc4699d7ca60bb5e4] | committer: Derk-Jan Hartman 

mmap: Only use MAP_NOCACHE on platforms that support it.

That would be Darwin and some BSDs apparently

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=8dcf947d585d89db6e6b879cc4699d7ca60bb5e4
---

 modules/access/mmap.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/modules/access/mmap.c b/modules/access/mmap.c
index a5aefd4..bce52f5 100644
--- a/modules/access/mmap.c
+++ b/modules/access/mmap.c
@@ -136,7 +136,12 @@ static int Open (vlc_object_t *p_this)
     /* Autodetect mmap() support */
     if (st.st_size > 0)
     {
-        void *addr = mmap (NULL, 1, PROT_READ|PROT_WRITE, MAP_PRIVATE | MAP_NOCACHE, fd, 0);
+        int flags = MAP_PRIVATE;
+#if defined(MAP_NOCACHE)
+        flags |= MAP_NOCACHE;
+#endif
+
+        void *addr = mmap (NULL, 1, PROT_READ|PROT_WRITE, flags, fd, 0);
         if (addr != MAP_FAILED)
             munmap (addr, 1);
         else