nsprpub/pr/src/memory/prseg.c@6474c204b198 (annotated)
nsprpub/pr/src/memory/prseg.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "primpl.h" |
| michael@0 | 7 | |
| michael@0 | 8 | #if defined(_PR_PTHREADS) |
| michael@0 | 9 | |
| michael@0 | 10 | /* |
| michael@0 | 11 | ** The pthreads version doesn't use these functions. |
| michael@0 | 12 | */ |
| michael@0 | 13 | void _PR_InitSegs(void) |
| michael@0 | 14 | { |
| michael@0 | 15 | } |
| michael@0 | 16 | |
| michael@0 | 17 | #else /* _PR_PTHREADS */ |
| michael@0 | 18 | |
| michael@0 | 19 | void _PR_InitSegs(void) |
| michael@0 | 20 | { |
| michael@0 | 21 | _PR_MD_INIT_SEGS(); |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | /* |
| michael@0 | 25 | ** Allocate a memory segment. The size value is rounded up to the native |
| michael@0 | 26 | ** system page size and a page aligned portion of memory is returned. |
| michael@0 | 27 | ** This memory is not part of the malloc heap. If "vaddr" is not NULL |
| michael@0 | 28 | ** then PR tries to allocate the segment at the desired virtual address. |
| michael@0 | 29 | */ |
| michael@0 | 30 | PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr) |
| michael@0 | 31 | { |
| michael@0 | 32 | PRSegment *seg; |
| michael@0 | 33 | |
| michael@0 | 34 | /* calloc the data structure for the segment */ |
| michael@0 | 35 | seg = PR_NEWZAP(PRSegment); |
| michael@0 | 36 | |
| michael@0 | 37 | if (seg) { |
| michael@0 | 38 | size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift; |
| michael@0 | 39 | /* |
| michael@0 | 40 | ** Now, allocate the actual segment memory (or map under some OS) |
| michael@0 | 41 | ** The OS specific code decides from where or how to allocate memory. |
| michael@0 | 42 | */ |
| michael@0 | 43 | if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) { |
| michael@0 | 44 | PR_DELETE(seg); |
| michael@0 | 45 | return NULL; |
| michael@0 | 46 | } |
| michael@0 | 47 | } |
| michael@0 | 48 | |
| michael@0 | 49 | return seg; |
| michael@0 | 50 | } |
| michael@0 | 51 | |
| michael@0 | 52 | /* |
| michael@0 | 53 | ** Free a memory segment. |
| michael@0 | 54 | */ |
| michael@0 | 55 | void _PR_DestroySegment(PRSegment *seg) |
| michael@0 | 56 | { |
| michael@0 | 57 | _PR_MD_FREE_SEGMENT(seg); |
| michael@0 | 58 | PR_DELETE(seg); |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | #endif /* _PR_PTHREADS */ |
