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)13void _PR_InitSegs(void) 14 { 15 } 16 17 #else /* _PR_PTHREADS */ 18 _PR_InitSegs(void)19void _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)30PRSegment* _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)55void _PR_DestroySegment(PRSegment *seg) 56 { 57 _PR_MD_FREE_SEGMENT(seg); 58 PR_DELETE(seg); 59 } 60 61 #endif /* _PR_PTHREADS */ 62