--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nspr/pr/src/memory/prseg.c	Mon Jul 28 10:47:06 2014 +0200
@@ -0,0 +1,61 @@
+/* -*- 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 "primpl.h"
+
+#if defined(_PR_PTHREADS)
+
+/*
+** The pthreads version doesn't use these functions.
+*/
+void _PR_InitSegs(void)
+{
+}
+
+#else /* _PR_PTHREADS */
+
+void _PR_InitSegs(void)
+{
+	_PR_MD_INIT_SEGS();
+}
+
+/*
+** Allocate a memory segment. The size value is rounded up to the native
+** system page size and a page aligned portion of memory is returned.
+** This memory is not part of the malloc heap. If "vaddr" is not NULL
+** then PR tries to allocate the segment at the desired virtual address.
+*/
+PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr)
+{
+    PRSegment *seg;
+
+	/* calloc the data structure for the segment */
+    seg = PR_NEWZAP(PRSegment);
+
+    if (seg) {
+	    size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift;
+		/*
+		**	Now, allocate the actual segment memory (or map under some OS)
+		**	The OS specific code decides from where or how to allocate memory.
+		*/
+	    if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) {
+			PR_DELETE(seg);
+			return NULL;
+    	}
+	}
+
+    return seg;
+}
+
+/*
+** Free a memory segment.
+*/
+void _PR_DestroySegment(PRSegment *seg)
+{
+	_PR_MD_FREE_SEGMENT(seg);
+    PR_DELETE(seg);
+}
+
+#endif /* _PR_PTHREADS */