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

How does vb.net achieve polymorphism, How does VB.NET/C# achieve polymorphi...

How does VB.NET/C# achieve polymorphism?  VB.Net / C# provide polymorphism through the following mechanisms: 1. Inheritance - base class gives overridable methods which ar

I2c protocol bus , I²C TECHNOLOGIES The I2C protocol bus is two bi-dire...

I²C TECHNOLOGIES The I2C protocol bus is two bi-directional wires, serial data (SDA) and serial clock (SCL), that transmit information between the devices connected to the bus.

How can a function return a pointer to its calling routine, How can a funct...

How can a function return a pointer to its calling routine? The general form of a function is: type_specifier function_name(parameter list) { body of function; }

Describe session handling in a web farm, Describe session handling in a web...

Describe session handling in a web farm, how does it work and what are the limits ?   In ASP.NET there are three ways to handle session objects. Single support the in-proc mec

How do you pass basic types by reference, How do you pass basic types by re...

How do you pass basic types by reference?   In the case of basic types like bool, int, uint, etc. you can in fact choose among the two forms. If you prefix the method parameter

What are the types of calendars in a single interface, What are the types o...

What are the types of calendars in a single interface? Member Event calendar helps users manage their personal time, Kept track of meetings with others, and so on. Tea

How to define a filename in dos, Q. How to define a Filename in DOS? Ea...

Q. How to define a Filename in DOS? Each file is given a name so that it can be referred to later. This name is termed as Filename. The filename in DOS can be up to eight alpha

Determine the use of loop instruction, Q. Determine the use of LOOP instruc...

Q. Determine the use of LOOP instruction? Program: This program prints the alphabets (A-Z) ; Register used: AX, CX, DX CODE SEGMENT ASSUME: CS: CODE.     MAINP:

Explain both absolute addressing and implied addressing, Absolute addressin...

Absolute addressing and  Implied addressing A fixed address is specified and also called as direct addressing. The location of data is implied by instruction itself, so no

What is collection objects in vb, Likewise to arrays but is preferred over ...

Likewise to arrays but is preferred over an array due to of the following reasons. 1. A collection objects uses less Memory than an array. 2. It gives methods to add and dele

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