1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is the Netscape Portable Runtime (NSPR).
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998-2000
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #include "primpl.h"
39 :
40 : #if defined(_PR_PTHREADS)
41 :
42 : /*
43 : ** The pthreads version doesn't use these functions.
44 : */
45 20034 : void _PR_InitSegs(void)
46 : {
47 20034 : }
48 :
49 : #else /* _PR_PTHREADS */
50 :
51 : void _PR_InitSegs(void)
52 : {
53 : _PR_MD_INIT_SEGS();
54 : }
55 :
56 : /*
57 : ** Allocate a memory segment. The size value is rounded up to the native
58 : ** system page size and a page aligned portion of memory is returned.
59 : ** This memory is not part of the malloc heap. If "vaddr" is not NULL
60 : ** then PR tries to allocate the segment at the desired virtual address.
61 : */
62 : PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr)
63 : {
64 : PRSegment *seg;
65 :
66 : /* calloc the data structure for the segment */
67 : seg = PR_NEWZAP(PRSegment);
68 :
69 : if (seg) {
70 : size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift;
71 : /*
72 : ** Now, allocate the actual segment memory (or map under some OS)
73 : ** The OS specific code decides from where or how to allocate memory.
74 : */
75 : if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) {
76 : PR_DELETE(seg);
77 : return NULL;
78 : }
79 : }
80 :
81 : return seg;
82 : }
83 :
84 : /*
85 : ** Free a memory segment.
86 : */
87 : void _PR_DestroySegment(PRSegment *seg)
88 : {
89 : _PR_MD_FREE_SEGMENT(seg);
90 : PR_DELETE(seg);
91 : }
92 :
93 : #endif /* _PR_PTHREADS */
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