Pointer (computer programming) and Tagged pointer

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Difference between Pointer (computer programming) and Tagged pointer

Pointer (computer programming) vs. Tagged pointer

In computer science, a pointer is a programming language object that stores the memory address of another value located in computer memory. 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.

Ada (programming language)

Ada is a structured, statically typed, imperative, and object-oriented high-level computer programming language, extended from Pascal and other languages.

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Byte addressing

Byte addressing refers to hardware architectures which support accessing individual bytes of data rather than only larger units called words, which would be word-addressable.

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C++11

C++11 is a version of the standard for the programming language C++.

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Computer science

Computer science deals with the theoretical foundations of information and computation, together with practical techniques for the implementation and application of these foundations.

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Data structure

In computer science, a data structure is a data organization and storage format that enables efficient access and modification.

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Data structure alignment

Data structure alignment refers to the way data is arranged and accessed in computer memory.

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Memory address

In computing, a memory address is a reference to a specific memory location used at various levels by software and hardware.

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Null pointer

In computing, a null pointer has a value reserved for indicating that the pointer does not refer to a valid object.

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Physical address

In computing, a physical address (also real address, or binary address), is a memory address that is represented in the form of a binary number on the address bus circuitry in order to enable the data bus to access a particular storage cell of main memory, or a register of memory mapped I/O device.

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Reference counting

In computer science, reference counting is a technique of storing the number of references, pointers, or handles to a resource such as an object, block of memory, disk space or other resource.

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Subroutine

In computer programming, a subroutine is a sequence of program instructions that performs a specific task, packaged as a unit.

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Virtual address space

In computing, a virtual address space (VAS) or address space is the set of ranges of virtual addresses that an operating system makes available to a process.

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Virtual memory

In computing, virtual memory (also virtual storage) is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very large (main) memory." The computer's operating system, using a combination of hardware and software, maps memory addresses used by a program, called virtual addresses, into physical addresses in computer memory.

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Word (computer architecture)

In computing, a word is the natural unit of data used by a particular processor design.

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Word-addressable

Word-addressable is a computer architecture term.

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X86-64

x86-64 (also known as x64, x86_64, AMD64 and Intel 64) is the 64-bit version of the x86 instruction set.

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