Back to index

lightning-sunbird  0.9+nobinonly
prmmap.c
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is the Netscape Portable Runtime (NSPR).
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998-2000
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 /*
00039  *********************************************************************
00040  *
00041  * Memory-mapped files
00042  *
00043  *********************************************************************
00044  */
00045 
00046 #include "primpl.h"
00047 
00048 PR_IMPLEMENT(PRFileMap *) PR_CreateFileMap(
00049     PRFileDesc *fd,
00050     PRInt64 size,
00051     PRFileMapProtect prot)
00052 {
00053     PRFileMap *fmap;
00054 
00055     PR_ASSERT(prot == PR_PROT_READONLY || prot == PR_PROT_READWRITE
00056             || prot == PR_PROT_WRITECOPY);
00057     fmap = PR_NEWZAP(PRFileMap);
00058     if (NULL == fmap) {
00059        PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
00060        return NULL;
00061     }
00062     fmap->fd = fd;
00063     fmap->prot = prot;
00064     if (_PR_MD_CREATE_FILE_MAP(fmap, size) == PR_SUCCESS) {
00065        return fmap;
00066     } else {
00067        PR_DELETE(fmap);
00068        return NULL;
00069     }
00070 }
00071 
00072 PR_IMPLEMENT(PRInt32) PR_GetMemMapAlignment(void)
00073 {
00074     return _PR_MD_GET_MEM_MAP_ALIGNMENT();
00075 }
00076 
00077 PR_IMPLEMENT(void *) PR_MemMap(
00078     PRFileMap *fmap,
00079     PROffset64 offset,
00080     PRUint32 len)
00081 {
00082     return _PR_MD_MEM_MAP(fmap, offset, len);
00083 }
00084 
00085 PR_IMPLEMENT(PRStatus) PR_MemUnmap(void *addr, PRUint32 len)
00086 {
00087     return _PR_MD_MEM_UNMAP(addr, len);
00088 }
00089 
00090 PR_IMPLEMENT(PRStatus) PR_CloseFileMap(PRFileMap *fmap)
00091 {
00092     return _PR_MD_CLOSE_FILE_MAP(fmap);
00093 }