Define memory allocation functions, Computer Engineering

Assignment Help:

The various memory allocation functions are described below:

(i) malloc( ): It is a memory allocation function that assigns requested size of bytes and returns a pointer to the first byte of the allocated space. The malloc function returns a pointer of type void so we can allocate it to any type of pointer.

(ii) calloc( ): It is another memory allocation function that assigns space for an array of elements, initializes them to zero and then returns a pointer to the memory. This function is normally used for request memory space at run time. Whereas malloc allocates a single block of storage space, calloc allocates multiple block of storage, each of the similar size, and then sets all bytes to zero

(iii) realloc( ): realloc is a memory allocation function that changes the size of previously allocated space. Sometime it may happen that the allocated memory space is larger than what is needed or it is less than what is needed. In both cases, we can change the memory size already allocated with the help of the realloc function called as reallocation of memory

 


Related Discussions:- Define memory allocation functions

What are the types of smart cards used in e-commerce, What are the types of...

What are the types of Smart cards used in e-commerce? Generally there are 2 types of smart cards. Memory smart cards, which can be sighted as minuscule removable read/ write

Explain about mmx architecture, Explain about MMX architecture MMX arc...

Explain about MMX architecture MMX architecture introduces new packed data types. Data types are eight packed, consecutive 8-bit bytes; four packed, consecutive 16-bit words;

Input output techniques - computer architecture, Input Output Techniques: ...

Input Output Techniques: o   Interrupt driven o   Direct Memory Access (DMA) o   Programmed Programmed I/O   CPU has control over I/O directly   Read/write

Working of compact disk - computer architecture, Working of compact disk: ...

Working of compact disk: A CD is built from 1.2 mm thick, approximately all-pure polycarbonate plastic and its weighs is approximately 15-20 grams. From the core outward compo

Illustrate about the three state table buffers, Three state table buffers ...

Three state table buffers Three state table buffers: A bus system can be constructed with the help of three state gates instead of multiplexers. A three states gate is digital

Local minima - sigmoid units, Local minima - sigmoid units: Alternativ...

Local minima - sigmoid units: Alternatively in addition to getting over some local minima where the gradient is constant in one direction or adding momentum will increase the

The number of control lines for a 8 – to – 1 multiplexer, What is the numbe...

What is the number of control lines for a 8 - to - 1 multiplexer ? Ans. There are 3 control lines, for an 8 to 1 Multiplexer. The control signals are utilized to steer any one

Compare a decoder and a demultiplexer with block diagram, Compare a decoder...

Compare a decoder and a demultiplexer with suitable block diagrams. Ans. Demultiplexer has similar circuit as decoder but here e is obtained as the particular input line, the

How can arithmetic processor be associated to the CPU, Q. How can this arit...

Q. How can this arithmetic processor be associated to the CPU?  Two mechanisms are used for connecting arithmetic processor to CPU.   If an arithmetic processor is treated a

What are threads, What are threads? A thread, sometimes termed as a lig...

What are threads? A thread, sometimes termed as a lightweight process (LWP), is a fundamental unit of CPU utilization; this comprises a thread ID a register set and a stack and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd