/* 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 */