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