import from X.Org 7.2RC2

1 files changed, 64 insertions, 0 deletions

diff --git a/lib/libXaw/src/OS.c b/lib/libXaw/src/OS.c
new file mode 100644
index 000000000..ec80e63ff
--- /dev/null
+++ b/lib/libXaw/src/OS.c
@@ -0,0 +1,64 @@
+/* $XFree86: xc/lib/Xaw/OS.c,v 1.1 1998/12/06 10:44:34 dawes Exp $ */
+
+/* Some OS-dependent utility code */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <X11/Xosdefs.h>
+#include <X11/IntrinsicP.h>
+#include "Private.h"
+
+#ifndef X_NOT_POSIX
+#include <unistd.h>	/* for sysconf(), and getpagesize() */
+#endif
+
+#if defined(linux)
+/* kernel header doesn't work with -ansi */
+/* #include <asm/page.h> *//* for PAGE_SIZE */
+#define HAS_GETPAGESIZE
+#define HAS_SC_PAGESIZE	/* _SC_PAGESIZE may be an enum for Linux */
+#endif
+
+#if defined(CSRG_BASED)
+#define HAS_GETPAGESIZE
+#endif
+
+#if defined(sun)
+#define HAS_GETPAGESIZE
+#endif
+
+int
+_XawGetPageSize()
+{
+    static int pagesize = -1;
+
+    if (pagesize != -1)
+	return pagesize;
+
+    /* Try each supported method in the preferred order */
+
+#if defined(_SC_PAGESIZE) || defined(HAS_SC_PAGESIZE)
+    pagesize = sysconf(_SC_PAGESIZE);
+#endif
+
+#ifdef _SC_PAGE_SIZE
+    if (pagesize == -1)
+	pagesize = sysconf(_SC_PAGE_SIZE);
+#endif
+
+#ifdef HAS_GETPAGESIZE
+    if (pagesize == -1)
+	pagesize = getpagesize();
+#endif
+
+#ifdef PAGE_SIZE
+    if (pagesize == -1)
+	pagesize = PAGE_SIZE;
+#endif
+
+    if (pagesize == -1)
+	pagesize = 0;
+
+    return pagesize;
+}