зеркало из https://github.com/mozilla/pjs.git
103 строки
3.1 KiB
C++
103 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is Mozilla code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Mozilla Foundation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2010
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Benjamin Smedberg <benjamin@smedbergs.us>
|
|
* Taras Glek <tglek@mozilla.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef mozilla_FileUtils_h
|
|
#define mozilla_FileUtils_h
|
|
|
|
#include "nscore.h" // nsnull
|
|
|
|
#if defined(XP_UNIX) || defined(XP_OS2)
|
|
# include <unistd.h>
|
|
#elif defined(XP_WIN)
|
|
# include <io.h>
|
|
#endif
|
|
#include "prio.h"
|
|
|
|
#include "mozilla/Scoped.h"
|
|
|
|
namespace mozilla {
|
|
|
|
/**
|
|
* AutoFDClose is a RAII wrapper for PRFileDesc.
|
|
*
|
|
* Instances |PR_Close| their fds when they go out of scope.
|
|
**/
|
|
struct ScopedClosePRFDTraits
|
|
{
|
|
typedef PRFileDesc* type;
|
|
static type empty() { return NULL; }
|
|
static void release(type fd) {
|
|
if (fd != NULL) {
|
|
PR_Close(fd);
|
|
}
|
|
}
|
|
};
|
|
typedef Scoped<ScopedClosePRFDTraits> AutoFDClose;
|
|
|
|
/**
|
|
* ScopedCloseFD is a RAII wrapper for POSIX file descriptors
|
|
*
|
|
* Instances |close()| their fds when they go out of scope.
|
|
*/
|
|
struct ScopedCloseFDTraits
|
|
{
|
|
typedef int type;
|
|
static type empty() { return -1; }
|
|
static void release(type fd) {
|
|
if (fd != -1) {
|
|
close(fd);
|
|
}
|
|
}
|
|
};
|
|
typedef Scoped<ScopedCloseFDTraits> ScopedClose;
|
|
|
|
/**
|
|
* Fallocate efficiently and continuously allocates files via fallocate-type APIs.
|
|
* This is useful for avoiding fragmentation.
|
|
* On sucess the file be padded with zeros to grow to aLength.
|
|
*
|
|
* @param aFD file descriptor.
|
|
* @param aLength length of file to grow to.
|
|
* @return true on success.
|
|
*/
|
|
NS_COM_GLUE bool fallocate(PRFileDesc *aFD, PRInt64 aLength);
|
|
|
|
} // namespace mozilla
|
|
#endif
|