зеркало из https://github.com/mozilla/pjs.git
121 строка
3.8 KiB
C++
121 строка
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* vim: sw=2 ts=8 et :
|
|
*/
|
|
/* ***** 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
|
|
* The Mozilla Foundation
|
|
* Portions created by the Initial Developer are Copyright (C) 2010
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Chris Jones <jones.chris.g@gmail.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 ***** */
|
|
|
|
#include <math.h>
|
|
|
|
#include "nsIMemoryReporter.h"
|
|
#include "mozilla/ipc/SharedMemory.h"
|
|
|
|
namespace mozilla {
|
|
namespace ipc {
|
|
|
|
static PRInt64 gShmemAllocated;
|
|
static PRInt64 gShmemMapped;
|
|
static PRInt64 GetShmemAllocated(void*) { return gShmemAllocated; }
|
|
static PRInt64 GetShmemMapped(void*) { return gShmemMapped; }
|
|
|
|
NS_MEMORY_REPORTER_IMPLEMENT(ShmemAllocated,
|
|
"shmem/allocated",
|
|
"Shmem bytes accessible (not necessarily mapped)",
|
|
GetShmemAllocated,
|
|
nsnull)
|
|
NS_MEMORY_REPORTER_IMPLEMENT(ShmemMapped,
|
|
"shmem/mapped",
|
|
"Shmem bytes mapped into address space",
|
|
GetShmemMapped,
|
|
nsnull)
|
|
|
|
SharedMemory::SharedMemory()
|
|
: mAllocSize(0)
|
|
, mMappedSize(0)
|
|
{
|
|
// NB: SharedMemory is main-thread-only at the moment, but that may
|
|
// change soon
|
|
static bool registered;
|
|
if (!registered) {
|
|
NS_RegisterMemoryReporter(new NS_MEMORY_REPORTER_NAME(ShmemAllocated));
|
|
NS_RegisterMemoryReporter(new NS_MEMORY_REPORTER_NAME(ShmemMapped));
|
|
registered = true;
|
|
}
|
|
}
|
|
|
|
/*static*/ size_t
|
|
SharedMemory::PageAlignedSize(size_t aSize)
|
|
{
|
|
size_t pageSize = SystemPageSize();
|
|
size_t nPagesNeeded = size_t(ceil(double(aSize) / double(pageSize)));
|
|
return pageSize * nPagesNeeded;
|
|
}
|
|
|
|
void
|
|
SharedMemory::Created(size_t aNBytes)
|
|
{
|
|
mAllocSize = aNBytes;
|
|
gShmemAllocated += mAllocSize;
|
|
}
|
|
|
|
void
|
|
SharedMemory::Mapped(size_t aNBytes)
|
|
{
|
|
mMappedSize = aNBytes;
|
|
gShmemMapped += mMappedSize;
|
|
}
|
|
|
|
void
|
|
SharedMemory::Unmapped()
|
|
{
|
|
NS_ABORT_IF_FALSE(gShmemMapped >= PRInt64(mMappedSize),
|
|
"Can't unmap more than mapped");
|
|
gShmemMapped -= mMappedSize;
|
|
mMappedSize = 0;
|
|
}
|
|
|
|
/*static*/ void
|
|
SharedMemory::Destroyed()
|
|
{
|
|
NS_ABORT_IF_FALSE(gShmemAllocated >= PRInt64(mAllocSize),
|
|
"Can't destroy more than allocated");
|
|
gShmemAllocated -= mAllocSize;
|
|
mAllocSize = 0;
|
|
}
|
|
|
|
} // namespace ipc
|
|
} // namespace mozilla
|