1 files changed, 69 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/prosdep.c b/nsprpub/pr/src/md/prosdep.c
new file mode 100644
index 0000000000..0b1f3e597a
--- /dev/null
+++ b/nsprpub/pr/src/md/prosdep.c
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "prbit.h"
+#include "prsystem.h"
+
+#ifdef XP_UNIX
+#include <unistd.h>
+#endif
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+PRInt32 _pr_pageShift;
+PRInt32 _pr_pageSize;
+
+/*
+** Get system page size
+*/
+static void GetPageSize(void)
+{
+    PRInt32 pageSize;
+
+    /* Get page size */
+#ifdef XP_UNIX
+#if defined BSDI || defined AIX \
+        || defined LINUX || defined __GNU__ || defined __GLIBC__ \
+        || defined FREEBSD || defined NETBSD || defined OPENBSD \
+        || defined DARWIN
+    _pr_pageSize = getpagesize();
+#elif defined(HPUX)
+    /* I have no idea. Don't get me started. --Rob */
+    _pr_pageSize = sysconf(_SC_PAGE_SIZE);
+#else
+    _pr_pageSize = sysconf(_SC_PAGESIZE);
+#endif
+#endif /* XP_UNIX */
+
+#ifdef XP_PC
+#ifdef _WIN32
+    SYSTEM_INFO info;
+    GetSystemInfo(&info);
+    _pr_pageSize = info.dwPageSize;
+#else
+    _pr_pageSize = 4096;
+#endif
+#endif /* XP_PC */
+
+    pageSize = _pr_pageSize;
+    PR_CEILING_LOG2(_pr_pageShift, pageSize);
+}
+
+PR_IMPLEMENT(PRInt32) PR_GetPageShift(void)
+{
+    if (!_pr_pageSize) {
+        GetPageSize();
+    }
+    return _pr_pageShift;
+}
+
+PR_IMPLEMENT(PRInt32) PR_GetPageSize(void)
+{
+    if (!_pr_pageSize) {
+        GetPageSize();
+    }
+    return _pr_pageSize;
+}