Mercurial > trustbridge > nss-cmake-static

annotate nspr/pr/src/memory/prseg.c @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 #include "primpl.h"
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7
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8 #if defined(_PR_PTHREADS)
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9
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10 /*
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11 ** The pthreads version doesn't use these functions.
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12 */
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13 void _PR_InitSegs(void)
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14 {
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15 }
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16
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17 #else /* _PR_PTHREADS */
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18
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19 void _PR_InitSegs(void)
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20 {
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21 _PR_MD_INIT_SEGS();
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22 }
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23
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24 /*
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25 ** Allocate a memory segment. The size value is rounded up to the native
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26 ** system page size and a page aligned portion of memory is returned.
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27 ** This memory is not part of the malloc heap. If "vaddr" is not NULL
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28 ** then PR tries to allocate the segment at the desired virtual address.
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29 */
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30 PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr)
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31 {
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32 PRSegment *seg;
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33
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34 /* calloc the data structure for the segment */
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35 seg = PR_NEWZAP(PRSegment);
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36
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37 if (seg) {
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38 size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift;
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39 /*
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40 ** Now, allocate the actual segment memory (or map under some OS)
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41 ** The OS specific code decides from where or how to allocate memory.
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42 */
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43 if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) {
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44 PR_DELETE(seg);
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45 return NULL;
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46 }
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47 }
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48
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49 return seg;
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50 }
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51
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52 /*
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53 ** Free a memory segment.
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54 */
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55 void _PR_DestroySegment(PRSegment *seg)
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56 {
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57 _PR_MD_FREE_SEGMENT(seg);
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58 PR_DELETE(seg);
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59 }
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60
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61 #endif /* _PR_PTHREADS */
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