1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3  * License, v. 2.0. If a copy of the MPL was not distributed with this
4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 
6 #include "primpl.h"
7 
8 #if defined(_PR_PTHREADS)
9 
10 /*
11 ** The pthreads version doesn't use these functions.
12 */
_PR_InitSegs(void)13 void _PR_InitSegs(void)
14 {
15 }
16 
17 #else /* _PR_PTHREADS */
18 
_PR_InitSegs(void)19 void _PR_InitSegs(void)
20 {
21     _PR_MD_INIT_SEGS();
22 }
23 
24 /*
25 ** Allocate a memory segment. The size value is rounded up to the native
26 ** system page size and a page aligned portion of memory is returned.
27 ** This memory is not part of the malloc heap. If "vaddr" is not NULL
28 ** then PR tries to allocate the segment at the desired virtual address.
29 */
_PR_NewSegment(PRUint32 size,void * vaddr)30 PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr)
31 {
32     PRSegment *seg;
33 
34     /* calloc the data structure for the segment */
35     seg = PR_NEWZAP(PRSegment);
36 
37     if (seg) {
38         size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift;
39         /*
40         **  Now, allocate the actual segment memory (or map under some OS)
41         **  The OS specific code decides from where or how to allocate memory.
42         */
43         if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) {
44             PR_DELETE(seg);
45             return NULL;
46         }
47     }
48 
49     return seg;
50 }
51 
52 /*
53 ** Free a memory segment.
54 */
_PR_DestroySegment(PRSegment * seg)55 void _PR_DestroySegment(PRSegment *seg)
56 {
57     _PR_MD_FREE_SEGMENT(seg);
58     PR_DELETE(seg);
59 }
60 
61 #endif /* _PR_PTHREADS */
62