michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "primpl.h"
michael@0: 
michael@0: #if defined(_PR_PTHREADS)
michael@0: 
michael@0: /*
michael@0: ** The pthreads version doesn't use these functions.
michael@0: */
michael@0: void _PR_InitSegs(void)
michael@0: {
michael@0: }
michael@0: 
michael@0: #else /* _PR_PTHREADS */
michael@0: 
michael@0: void _PR_InitSegs(void)
michael@0: {
michael@0: 	_PR_MD_INIT_SEGS();
michael@0: }
michael@0: 
michael@0: /*
michael@0: ** Allocate a memory segment. The size value is rounded up to the native
michael@0: ** system page size and a page aligned portion of memory is returned.
michael@0: ** This memory is not part of the malloc heap. If "vaddr" is not NULL
michael@0: ** then PR tries to allocate the segment at the desired virtual address.
michael@0: */
michael@0: PRSegment* _PR_NewSegment(PRUint32 size, void *vaddr)
michael@0: {
michael@0:     PRSegment *seg;
michael@0: 
michael@0: 	/* calloc the data structure for the segment */
michael@0:     seg = PR_NEWZAP(PRSegment);
michael@0: 
michael@0:     if (seg) {
michael@0: 	    size = ((size + _pr_pageSize - 1) >> _pr_pageShift) << _pr_pageShift;
michael@0: 		/*
michael@0: 		**	Now, allocate the actual segment memory (or map under some OS)
michael@0: 		**	The OS specific code decides from where or how to allocate memory.
michael@0: 		*/
michael@0: 	    if (_PR_MD_ALLOC_SEGMENT(seg, size, vaddr) != PR_SUCCESS) {
michael@0: 			PR_DELETE(seg);
michael@0: 			return NULL;
michael@0:     	}
michael@0: 	}
michael@0: 
michael@0:     return seg;
michael@0: }
michael@0: 
michael@0: /*
michael@0: ** Free a memory segment.
michael@0: */
michael@0: void _PR_DestroySegment(PRSegment *seg)
michael@0: {
michael@0: 	_PR_MD_FREE_SEGMENT(seg);
michael@0:     PR_DELETE(seg);
michael@0: }
michael@0: 
michael@0: #endif /* _PR_PTHREADS */