1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/nsprpub/pr/src/memory/prseg.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,61 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "primpl.h"
1.10 +
1.11 +#if defined(_PR_PTHREADS)
1.12 +
1.13 +/*
1.14 +** The pthreads version doesn't use these functions.
1.15 +*/
1.16 +void _PR_InitSegs(void)
1.17 +{
1.18 +}
1.19 +
1.20 +#else /* _PR_PTHREADS */
1.21 +
1.22 +void _PR_InitSegs(void)
1.23 +{
1.24 + _PR_MD_INIT_SEGS();
1.25 +}
1.26 +
1.27 +/*
1.28 +** Allocate a memory segment. The size value is rounded up to the native
1.29 +** system page size and a page aligned portion of memory is returned.
1.30 +** This memory is not part of the malloc heap. If "vaddr" is not NULL
1.31 +** then PR tries to allocate the segment at the desired virtual address.
1.32 +*/
1.33 +PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr)
1.34 +{
1.35 + PRSegment *seg;
1.36 +
1.37 + /* calloc the data structure for the segment */
1.38 + seg = PR_NEWZAP(PRSegment);
1.39 +
1.40 + if (seg) {
1.41 + size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift;
1.42 + /*
1.43 + ** Now, allocate the actual segment memory (or map under some OS)
1.44 + ** The OS specific code decides from where or how to allocate memory.
1.45 + */
1.46 + if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) {
1.47 + PR_DELETE(seg);
1.48 + return NULL;
1.49 + }
1.50 + }
1.51 +
1.52 + return seg;
1.53 +}
1.54 +
1.55 +/*
1.56 +** Free a memory segment.
1.57 +*/
1.58 +void _PR_DestroySegment(PRSegment *seg)
1.59 +{
1.60 + _PR_MD_FREE_SEGMENT(seg);
1.61 + PR_DELETE(seg);
1.62 +}
1.63 +
1.64 +#endif /* _PR_PTHREADS */
