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

Exit the loop on end-of-file, Continuing in main, write a loop that will re...

Continuing in main, write a loop that will read from the ifstream that reads enough information to  create a person object (i.e. first name, last name, and weight).  Exit the loop

Determine about the security policy, Determine about the Security Policy ...

Determine about the Security Policy In the United States, the government has a separate organisation looking after the security measures and providing guidelines to all departm

Real-time software, Real-Time Software Programs that monitor/analyze...

Real-Time Software Programs that monitor/analyze/ control real world events as they take place are known as real-time software. Elements of real-time software involve a data

Arrow keys - input commands, When the user is inputting commands into your...

When the user is inputting commands into your shell, it should identify the left, right , up and down arrow keys. To implement this, you will need to use the termios.h library to

Learning weights in perceptrons, Learning Weights in Perceptrons In det...

Learning Weights in Perceptrons In detail we will look at the learning method for weights in multi-layer networks next chapter. The following description of learning in percept

What do you mean by drive cache, Q. What do you mean by Drive Cache? Di...

Q. What do you mean by Drive Cache? Disk cache may be a part of RAM sometimes known as soft disk cache which is used to speed up access time on a disk. In latest technologies s

Interrupt and scanning method of keypad operation, INTERRUPT METHOD - USING...

INTERRUPT METHOD - USING PORTB CHANGE INTERRUPT By using 4 by 4 matrix keypad connected to PORTA and PORTB. The rows are connected to PORTA-Low (RA1-RA4) and the columns are co

Write a program to input an address, Write a program to input an address i....

Write a program to input an address i.e. 20 Hex and read the byte (char) contents of that address   Answer   include void main() { char prompt; Date: 26th August 2012

Implementation of BUS, Q. Implementation of BUS Construction of a bus s...

Q. Implementation of BUS Construction of a bus system for four registers employing 4×1 multiplexers is displayed below. Every register has four bits which are numbered 0 throug

Determine the performance of a parallel algorithm, Q. Determine the perform...

Q. Determine the performance of a parallel algorithm? One more method of determining the performance of a parallel algorithm can be performed after calculating a parameter know

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