LCOV - app.info - ipc/glue/SharedMemory.cpp

LCOV - code coverage report
| Current view: | directory - ipc/glue - SharedMemory.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 35 | 0 | 0.0 %
| Date: | 2012-04-21 | Functions: | 28 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
           2                 :  * vim: sw=2 ts=8 et :
           3                 :  */
           4                 : /* ***** BEGIN LICENSE BLOCK *****
           5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           6                 :  *
           7                 :  * The contents of this file are subject to the Mozilla Public License Version
           8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           9                 :  * the License. You may obtain a copy of the License at:
          10                 :  * http://www.mozilla.org/MPL/
          11                 :  *
          12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          14                 :  * for the specific language governing rights and limitations under the
          15                 :  * License.
          16                 :  *
          17                 :  * The Original Code is Mozilla Code.
          18                 :  *
          19                 :  * The Initial Developer of the Original Code is
          20                 :  *   The Mozilla Foundation
          21                 :  * Portions created by the Initial Developer are Copyright (C) 2010
          22                 :  * the Initial Developer. All Rights Reserved.
          23                 :  *
          24                 :  * Contributor(s):
          25                 :  *   Chris Jones <jones.chris.g@gmail.com>
          26                 :  *
          27                 :  * Alternatively, the contents of this file may be used under the terms of
          28                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
          29                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          31                 :  * of those above. If you wish to allow use of your version of this file only
          32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          33                 :  * use your version of this file under the terms of the MPL, indicate your
          34                 :  * decision by deleting the provisions above and replace them with the notice
          35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          36                 :  * the provisions above, a recipient may use your version of this file under
          37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          38                 :  *
          39                 :  * ***** END LICENSE BLOCK ***** */
          40                 :
          41                 : #include <math.h>
          42                 :
          43                 : #include "nsString.h"
          44                 : #include "nsIMemoryReporter.h"
          45                 : #include "mozilla/ipc/SharedMemory.h"
          46                 :
          47                 : namespace mozilla {
          48                 : namespace ipc {
          49                 :
          50                 : static PRInt64 gShmemAllocated;
          51                 : static PRInt64 gShmemMapped;
          52               0 : static PRInt64 GetShmemAllocated() { return gShmemAllocated; }
          53               0 : static PRInt64 GetShmemMapped() { return gShmemMapped; }
          54                 :
          55               0 : NS_MEMORY_REPORTER_IMPLEMENT(ShmemAllocated,
          56                 :     "shmem-allocated",
          57                 :     KIND_OTHER,
          58                 :     UNITS_BYTES,
          59                 :     GetShmemAllocated,
          60                 :     "Memory shared with other processes that is accessible (but not "
          61               0 :     "necessarily mapped).")
          62               0 : NS_MEMORY_REPORTER_IMPLEMENT(ShmemMapped,
          63                 :     "shmem-mapped",
          64                 :     KIND_OTHER,
          65                 :     UNITS_BYTES,
          66                 :     GetShmemMapped,
          67               0 :     "Memory shared with other processes that is mapped into the address space.")
          68                 :
          69               0 : SharedMemory::SharedMemory()
          70                 :   : mAllocSize(0)
          71               0 :   , mMappedSize(0)
          72                 : {
          73                 :   // NB: SharedMemory is main-thread-only at the moment, but that may
          74                 :   // change soon
          75                 :   static bool registered;
          76               0 :   if (!registered) {
          77               0 :     NS_RegisterMemoryReporter(new NS_MEMORY_REPORTER_NAME(ShmemAllocated));
          78               0 :     NS_RegisterMemoryReporter(new NS_MEMORY_REPORTER_NAME(ShmemMapped));
          79               0 :     registered = true;
          80                 :   }
          81               0 : }
          82                 :
          83                 : /*static*/ size_t
          84               0 : SharedMemory::PageAlignedSize(size_t aSize)
          85                 : {
          86               0 :   size_t pageSize = SystemPageSize();
          87               0 :   size_t nPagesNeeded = size_t(ceil(double(aSize) / double(pageSize)));
          88               0 :   return pageSize * nPagesNeeded;
          89                 : }
          90                 :
          91                 : void
          92               0 : SharedMemory::Created(size_t aNBytes)
          93                 : {
          94               0 :   mAllocSize = aNBytes;
          95               0 :   gShmemAllocated += mAllocSize;
          96               0 : }
          97                 :
          98                 : void
          99               0 : SharedMemory::Mapped(size_t aNBytes)
         100                 : {
         101               0 :   mMappedSize = aNBytes;
         102               0 :   gShmemMapped += mMappedSize;
         103               0 : }
         104                 :
         105                 : void
         106               0 : SharedMemory::Unmapped()
         107                 : {
         108               0 :   NS_ABORT_IF_FALSE(gShmemMapped >= PRInt64(mMappedSize),
         109                 :                     "Can't unmap more than mapped");
         110               0 :   gShmemMapped -= mMappedSize;
         111               0 :   mMappedSize = 0;
         112               0 : }
         113                 :
         114                 : /*static*/ void
         115               0 : SharedMemory::Destroyed()
         116                 : {
         117               0 :   NS_ABORT_IF_FALSE(gShmemAllocated >= PRInt64(mAllocSize),
         118                 :                     "Can't destroy more than allocated");
         119               0 :   gShmemAllocated -= mAllocSize;
         120               0 :   mAllocSize = 0;
         121               0 : }
         122                 :
         123                 : } // namespace ipc
         124                 : } // namespace mozilla

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