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authorUlrich Drepper <drepper@redhat.com>2010-03-27 06:19:50 -0700
committerUlrich Drepper <drepper@redhat.com>2010-03-27 06:19:50 -0700
commit8f4a5048eea6536ee85c0f2670adbb97d71e427d (patch)
tree1262cfcfca944bd0301fd264b036abde505036b8 /sysdeps/unix/sysv/linux/getpagesize.c
parent0a164fe03ee79d93e5dd2b1e1917e4ff5d580e1f (diff)
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Optimize __getpagesize a bit.
Diffstat (limited to 'sysdeps/unix/sysv/linux/getpagesize.c')
-rw-r--r--sysdeps/unix/sysv/linux/getpagesize.c27
1 files changed, 17 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/getpagesize.c b/sysdeps/unix/sysv/linux/getpagesize.c
index 6d03b3bbf2..0866079511 100644
--- a/sysdeps/unix/sysv/linux/getpagesize.c
+++ b/sysdeps/unix/sysv/linux/getpagesize.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,1992,1995-1997,2000,2002,2004
+/* Copyright (C) 1991,1992,1995-1997,2000,2002,2004,2010
Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -17,30 +17,37 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include <assert.h>
#include <unistd.h>
#include <sys/param.h>
#include <ldsodefs.h>
+#include <kernel-features.h>
/* Return the system page size. */
int
__getpagesize ()
{
+#ifdef __ASSUME_AT_PAGESIZE
+ assert (GLRO(dl_pagesize) != 0);
+ return GLRO(dl_pagesize);
+#else
if (GLRO(dl_pagesize) != 0)
return GLRO(dl_pagesize);
-#ifdef EXEC_PAGESIZE
+# ifdef EXEC_PAGESIZE
return EXEC_PAGESIZE;
-#else /* No EXEC_PAGESIZE. */
-#ifdef NBPG
-#ifndef CLSIZE
-#define CLSIZE 1
-#endif /* No CLSIZE. */
+# else /* No EXEC_PAGESIZE. */
+# ifdef NBPG
+# ifndef CLSIZE
+# define CLSIZE 1
+# endif /* No CLSIZE. */
return NBPG * CLSIZE;
-#else /* No NBPG. */
+# else /* No NBPG. */
return NBPC;
-#endif /* NBPG. */
-#endif /* EXEC_PAGESIZE. */
+# endif /* NBPG. */
+# endif /* EXEC_PAGESIZE. */
+#endif
}
libc_hidden_def (__getpagesize)
weak_alias (__getpagesize, getpagesize)