diff options
| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2013-06-22 16:16:13 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2014-11-08 23:18:07 +0100 |
| commit | c606f0866c3a2a5db3ef9bc41738ef33eb9612a9 (patch) | |
| tree | 5847c644cdfff3c1dd55b88b565448087ae89f11 /src/Platform/SharedPtr.h | |
| download | VeraCrypt-c606f0866c3a2a5db3ef9bc41738ef33eb9612a9.tar.gz VeraCrypt-c606f0866c3a2a5db3ef9bc41738ef33eb9612a9.zip | |
Add original TrueCrypt 7.1a sources
Diffstat (limited to 'src/Platform/SharedPtr.h')
| -rw-r--r-- | src/Platform/SharedPtr.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/Platform/SharedPtr.h b/src/Platform/SharedPtr.h new file mode 100644 index 00000000..3221265d --- /dev/null +++ b/src/Platform/SharedPtr.h @@ -0,0 +1,162 @@ +/*
+ Copyright (c) 2008 TrueCrypt Developers Association. All rights reserved.
+
+ Governed by the TrueCrypt License 3.0 the full text of which is contained in
+ the file License.txt included in TrueCrypt binary and source code distribution
+ packages.
+*/
+
+#ifndef TC_HEADER_Platform_SharedPtr
+#define TC_HEADER_Platform_SharedPtr
+
+#include <stdexcept>
+#include "SharedVal.h"
+
+#ifdef nullptr
+
+namespace TrueCrypt
+{
+ template <class T>
+ class SharedPtr
+ {
+ public:
+ explicit SharedPtr ()
+ : Pointer (nullptr), UseCount (nullptr) { }
+
+ explicit SharedPtr (T *pointer)
+ : Pointer (pointer), UseCount (new SharedVal <uint64> (1)) { }
+
+ SharedPtr (const SharedPtr &source)
+ {
+ CopyFrom (source);
+ }
+
+ ~SharedPtr ()
+ {
+ Release();
+ }
+
+ SharedPtr &operator= (const SharedPtr &source)
+ {
+ if (&source == this)
+ return *this;
+
+ Release();
+ CopyFrom (source);
+ return *this;
+ }
+
+ bool operator == (const SharedPtr &other)
+ {
+ return get() == other.get();
+ }
+
+ bool operator != (const SharedPtr &other)
+ {
+ return get() != other.get();
+ }
+
+ T &operator* () const
+ {
+#ifdef DEBUG
+ if (Pointer == nullptr)
+ throw std::runtime_error (SRC_POS);
+#endif
+ return *Pointer;
+ }
+
+ T *operator-> () const
+ {
+#ifdef DEBUG
+ if (Pointer == nullptr)
+ throw std::runtime_error (SRC_POS);
+#endif
+ return Pointer;
+ }
+
+ operator bool () const
+ {
+ return Pointer != nullptr;
+ }
+
+ T *get () const
+ {
+ return Pointer;
+ }
+
+ void reset ()
+ {
+ Release();
+ }
+
+ void reset (T *pointer)
+ {
+ *this = SharedPtr (pointer);
+ }
+
+ uint64 use_count () const
+ {
+ if (!UseCount)
+ return 0;
+
+ return *UseCount;
+ }
+
+ protected:
+ void CopyFrom (const SharedPtr &source)
+ {
+ Pointer = source.Pointer;
+ UseCount = source.UseCount;
+
+ if (UseCount)
+ UseCount->Increment();
+ }
+
+ void Release ()
+ {
+ if (UseCount != nullptr)
+ {
+ if (UseCount->Decrement() == 0)
+ {
+ if (Pointer != nullptr)
+ delete Pointer;
+ delete UseCount;
+ }
+
+ Pointer = nullptr;
+ UseCount = nullptr;
+ }
+ }
+
+ T *Pointer;
+ SharedVal <uint64> *UseCount;
+ };
+
+#ifdef shared_ptr
+#undef shared_ptr
+#endif
+#define shared_ptr TrueCrypt::SharedPtr
+
+#ifdef make_shared
+#undef make_shared
+#endif
+
+ template <class T> shared_ptr <T> make_shared ()
+ {
+ return shared_ptr <T> (new T ());
+ }
+
+ template <class T, class A> shared_ptr <T> make_shared (const A &arg)
+ {
+ return shared_ptr <T> (new T (arg));
+ }
+
+#define make_shared TrueCrypt::make_shared
+
+}
+
+#endif // nullptr
+
+#define make_shared_auto(typeName,instanceName) shared_ptr <typeName> instanceName (new typeName ())
+
+#endif // TC_HEADER_Platform_SharedPtr
|