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Member "src/Volume/EncryptionThreadPool.h" (10 Oct 2018, 2206 Bytes) of package /windows/misc/VeraCrypt_1.23-Hotfix-2_Source.zip:


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    1 /*
    2  Derived from source code of TrueCrypt 7.1a, which is
    3  Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
    4  by the TrueCrypt License 3.0.
    5 
    6  Modifications and additions to the original source code (contained in this file)
    7  and all other portions of this file are Copyright (c) 2013-2017 IDRIX
    8  and are governed by the Apache License 2.0 the full text of which is
    9  contained in the file License.txt included in VeraCrypt binary and source
   10  code distribution packages.
   11 */
   12 
   13 #ifndef TC_HEADER_Volume_EncryptionThreadPool
   14 #define TC_HEADER_Volume_EncryptionThreadPool
   15 
   16 #include "Platform/Platform.h"
   17 #include "EncryptionMode.h"
   18 
   19 namespace VeraCrypt
   20 {
   21     class EncryptionThreadPool
   22     {
   23     public:
   24         struct WorkType
   25         {
   26             enum Enum
   27             {
   28                 EncryptDataUnits,
   29                 DecryptDataUnits,
   30                 DeriveKey
   31             };
   32         };
   33 
   34         struct WorkItem
   35         {
   36             struct State
   37             {
   38                 enum Enum
   39                 {
   40                     Free,
   41                     Ready,
   42                     Busy
   43                 };
   44             };
   45 
   46             struct WorkItem *FirstFragment;
   47             auto_ptr <Exception> ItemException;
   48             SyncEvent ItemCompletedEvent;
   49             SharedVal <size_t> OutstandingFragmentCount;
   50             SharedVal <State::Enum> State;
   51             WorkType::Enum Type;
   52 
   53             union
   54             {
   55                 struct
   56                 {
   57                     const EncryptionMode *Mode;
   58                     byte *Data;
   59                     uint64 StartUnitNo;
   60                     uint64 UnitCount;
   61                     size_t SectorSize;
   62                 } Encryption;
   63             };
   64         };
   65 
   66         static void DoWork (WorkType::Enum type, const EncryptionMode *mode, byte *data, uint64 startUnitNo, uint64 unitCount, size_t sectorSize);
   67         static bool IsRunning () { return ThreadPoolRunning; }
   68         static void Start ();
   69         static void Stop ();
   70 
   71     protected:
   72         static void WorkThreadProc ();
   73 
   74         static const size_t MaxThreadCount = 32;
   75         static const size_t QueueSize = MaxThreadCount * 2;
   76 
   77         static Mutex DequeueMutex;
   78         static volatile size_t DequeuePosition;
   79         static volatile size_t EnqueuePosition;
   80         static Mutex EnqueueMutex;
   81         static list < shared_ptr <Thread> > RunningThreads;
   82         static volatile bool StopPending;
   83         static size_t ThreadCount;
   84         static volatile bool ThreadPoolRunning;
   85         static SyncEvent WorkItemCompletedEvent;
   86         static WorkItem WorkItemQueue[QueueSize];
   87         static SyncEvent WorkItemReadyEvent;
   88     };
   89 }
   90 
   91 #endif // TC_HEADER_Volume_EncryptionThreadPool