securityd/src/SharedMemoryServer.h

   1 /*
   2  * Copyright (c) 2016 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef __SHARED_MEMORY_SERVER__
  25 #define __SHARED_MEMORY_SERVER__
  26
  27 #include <stdlib.h>
  28 #include <string>
  29 #include "SharedMemoryCommon.h"
  30
  31 class SharedMemoryServer
  32 {
  33 protected:
  34         std::string mSegmentName, mFileName;
  35         size_t mSegmentSize;
  36     uid_t mUID;
  37
  38     u_int8_t* mSegment;
  39         u_int8_t* mDataArea;
  40         u_int8_t* mDataPtr;
  41         u_int8_t* mDataMax;
  42
  43     int mBackingFile;
  44
  45         void WriteOffset (SegmentOffsetType offset);
  46         void WriteData (const void* data, SegmentOffsetType length);
  47
  48
  49 public:
  50         SharedMemoryServer (const char* segmentName, SegmentOffsetType segmentSize, uid_t uid = 0, gid_t gid = 0);
  51         virtual ~SharedMemoryServer ();
  52
  53         void WriteMessage (SegmentOffsetType domain, SegmentOffsetType event, const void *message, SegmentOffsetType messageLength);
  54
  55         const char* GetSegmentName ();
  56         size_t GetSegmentSize ();
  57
  58         void SetProducerOffset (SegmentOffsetType producerOffset);
  59 };
  60
  61
  62
  63 #endif