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  2. Tagged pointer - Wikipedia

    en.wikipedia.org/wiki/Tagged_pointer

    In computer science, a tagged pointer is a pointer (concretely a memory address) with additional data associated with it, such as an indirection bit or reference count.This additional data is often "folded" into the pointer, meaning stored inline in the data representing the address, taking advantage of certain properties of memory addressing.

  3. Type punning - Wikipedia

    en.wikipedia.org/wiki/Type_punning

    On many common platforms, this use of pointer punning can create problems if different pointers are aligned in machine-specific ways. Furthermore, pointers of different sizes can alias accesses to the same memory, causing problems that are unchecked by the compiler. Even when data size and pointer representation match, however, compilers can ...

  4. Smart pointer - Wikipedia

    en.wikipedia.org/wiki/Smart_pointer

    Smart pointers can facilitate intentional programming by expressing, in the type, how the memory of the referent of the pointer will be managed. For example, if a C++ function returns a pointer, there is no way to know whether the caller should delete the memory of the referent when the caller is finished with the information.

  5. Pointer (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Pointer_(computer_programming)

    A dangling pointer is a pointer that does not point to a valid object and consequently may make a program crash or behave oddly. In the Pascal or C programming languages, pointers that are not specifically initialized may point to unpredictable addresses in memory. The following example code shows a dangling pointer:

  6. Reference counting - Wikipedia

    en.wikipedia.org/wiki/Reference_counting

    Reference counting is also among the simplest forms of memory management to implement. It also allows for effective management of non-memory resources such as operating system objects, which are often much scarcer than memory (tracing garbage collection systems use finalizers for this, [citation needed] but the delayed reclamation may cause ...

  7. Opaque pointer - Wikipedia

    en.wikipedia.org/wiki/Opaque_pointer

    The d-pointer pattern is one of the implementations of the opaque pointer. It is commonly used in C++ classes due to its advantages (noted below). A d-pointer is a private data member of the class that points to an instance of a structure. This method allows class declarations to omit private data members, except for the d-pointer itself. [6]

  8. Reference (computer science) - Wikipedia

    en.wikipedia.org/wiki/Reference_(computer_science)

    Smart pointers are opaque data structures that act like pointers but can only be accessed through particular methods. A handle is an abstract reference, and may be represented in various ways. A common example are file handles (the FILE data structure in the C standard I/O library), used to abstract file content.

  9. Dangling pointer - Wikipedia

    en.wikipedia.org/wiki/Dangling_pointer

    Tools such as Polyspace, TotalView, Valgrind, Mudflap, [8] AddressSanitizer, or tools based on LLVM [9] can also be used to detect uses of dangling pointers. Other tools (SoftBound, Insure++, and CheckPointer) instrument the source code to collect and track legitimate values for pointers ("metadata") and check each pointer access against the ...