Line data    Source code

       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             : /*
       7             :  *********************************************************************
       8             :  *
       9             :  * Memory-mapped files
      10             :  *
      11             :  *********************************************************************
      12             :  */
      13             : 
      14             : #include "primpl.h"
      15             : 
      16             : PR_IMPLEMENT(PRFileMap *) PR_CreateFileMap(
      17             :     PRFileDesc *fd,
      18             :     PRInt64 size,
      19             :     PRFileMapProtect prot)
      20             : {
      21             :     PRFileMap *fmap;
      22             : 
      23         107 :     PR_ASSERT(prot == PR_PROT_READONLY || prot == PR_PROT_READWRITE
      24             :             || prot == PR_PROT_WRITECOPY);
      25         107 :     fmap = PR_NEWZAP(PRFileMap);
      26         107 :     if (NULL == fmap) {
      27           0 :       PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
      28           0 :       return NULL;
      29             :     }
      30         107 :     fmap->fd = fd;
      31         107 :     fmap->prot = prot;
      32         107 :     if (_PR_MD_CREATE_FILE_MAP(fmap, size) == PR_SUCCESS) {
      33         107 :       return fmap;
      34             :     }
      35           0 :         PR_DELETE(fmap);
      36           0 :         return NULL;
      37             : }
      38             : 
      39             : PR_IMPLEMENT(PRInt32) PR_GetMemMapAlignment(void)
      40             : {
      41           1 :     return _PR_MD_GET_MEM_MAP_ALIGNMENT();
      42             : }
      43             : 
      44             : PR_IMPLEMENT(void *) PR_MemMap(
      45             :     PRFileMap *fmap,
      46             :     PROffset64 offset,
      47             :     PRUint32 len)
      48             : {
      49         107 :     return _PR_MD_MEM_MAP(fmap, offset, len);
      50             : }
      51             : 
      52             : PR_IMPLEMENT(PRStatus) PR_MemUnmap(void *addr, PRUint32 len)
      53             : {
      54         101 :     return _PR_MD_MEM_UNMAP(addr, len);
      55             : }
      56             : 
      57             : PR_IMPLEMENT(PRStatus) PR_CloseFileMap(PRFileMap *fmap)
      58             : {
      59         101 :     return _PR_MD_CLOSE_FILE_MAP(fmap);
      60             : }
      61             : 
      62             : PR_IMPLEMENT(PRStatus) PR_SyncMemMap(
      63             :     PRFileDesc *fd,
      64             :     void *addr,
      65             :     PRUint32 len)
      66             : {
      67           0 :   return _PR_MD_SYNC_MEM_MAP(fd, addr, len);
      68             : }