dangling pointer

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Custom Deleterboost:shared_ptr works with custom memory allocators.Suppose you want to allocate objects of type X from a special, optimized heap.// Gets memory from a custom heap and constructs an X at// that location with placement new.X* custom_allocate_x();// Destructs the X and releases the memorycustom_deallocate_x(X* p);You can now shield clients from the details of your allocation strategy with afactory function that returns a boost::shared_ptr.boost::shared_ptr make_x(){return boost::shared_ptr(custom_allocate_x(), &custom_deallocate_x);}
Handling HandlesCustom deleters can be used to manage things such as operating systemhandles and descriptors.// Win32 mutex handle managed by a boost::shared_ptr// A Win32 HANDLE is a void*boost::shared_ptr hMutex(::CreateMutex(NULL, TRUE, NULL),&CloseHandle);if(! hMutex){throw processKaputt;}
Page 1 and 2: The Boost Smart PointerLibraryThoma
Page 3 and 4: Contents of the Boost Smart Pointer
Page 5 and 6: The ProblemTraditional “managemen
Page 7 and 8: Null PointersC/C++ raw pointers hav
Page 9 and 10: Reassigning a shared_ptrboost::shar
Page 11: Pragmatism First (cont.)boost::shar
Page 18 and 19: Leaking Memory with Smart PointersT
Page 20 and 21: struct B;struct A {boost::shared_pt
Page 22 and 23: oost::shared_arrayIn C/C++, there a
Page 25 and 26: oost::scoped_arrayboost::scoped_arr
Page 27: Cyclic References and SymmetryIn pr
Page 30 and 31: oost::weak_ptr Creation and Resetti
Page 32 and 33: oost::weak_ptr Object Access (cont.
Page 34 and 35: Weak Pointers Relations Can Be Tric
Page 36 and 37: oost::intrusive_ptrboost::intrusive
Page 38 and 39: std::auto_ptr (cont.)Use std::auto_
Page 40 and 41: std::auto_ptr and Generic Codetempl
Page 42 and 43: Setting up Weak Pointer Relationscl
Page 44 and 45: How to enable shared from thisIf we

dangling pointer

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