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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "primpl.h"
#if defined(_PR_PTHREADS)
/*
** The pthreads version doesn't use these functions.
*/
void _PR_InitSegs(void)
{
}
#else /* _PR_PTHREADS */
void _PR_InitSegs(void)
{
_PR_MD_INIT_SEGS();
}
/*
** Allocate a memory segment. The size value is rounded up to the native
** system page size and a page aligned portion of memory is returned.
** This memory is not part of the malloc heap. If "vaddr" is not NULL
** then PR tries to allocate the segment at the desired virtual address.
*/
PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr)
{
PRSegment *seg;
/* calloc the data structure for the segment */
seg = PR_NEWZAP(PRSegment);
if (seg) {
size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift;
/*
** Now, allocate the actual segment memory (or map under some OS)
** The OS specific code decides from where or how to allocate memory.
*/
if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) {
PR_DELETE(seg);
return NULL;
}
}
return seg;
}
/*
** Free a memory segment.
*/
void _PR_DestroySegment(PRSegment *seg)
{
_PR_MD_FREE_SEGMENT(seg);
PR_DELETE(seg);
}
#endif /* _PR_PTHREADS */
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