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

Example on plane, Q. If a plane is in the air also there is a fly flying in...

Q. If a plane is in the air also there is a fly flying inside the plane does the plane get heavier when the fly lands? Answer:- It is true that a fly puts weight on a plan

What is replacement policy in cache, Q.What is Replacement Policy in cache?...

Q.What is Replacement Policy in cache? When a new block has to be fetched in cache the other block may have to be replaced to make room for new block. Replacement policy determ

Explain process of file transfer protocol, Q. Explain process of File Trans...

Q. Explain process of File Transfer Protocol? FTP (File Transfer Protocol), a standard Internet protocol, is the simplest way to exchange files between computers on Internet. L

Bit manipulation techniques and mathematical functions, Within micro contro...

Within micro controller's software, it is very useful to be able to manipulate binary bits i.e. from ports etc. The ALU has command to shift data, rotate data, compare data, set/cl

What is hit and hit rate , What is hit? A successful access to data in ...

What is hit? A successful access to data in cache memory is known as hit. Normal 0 false false false EN-IN X-NONE X-NONE

What is basic time division switching, What is Basic Time Division Switch...

What is Basic Time Division Switching? Basic Time Division Switching: The functional blocks of a memory based time division switching switch is demonstrated in figure and i

How a procedure define in assembly, Q. How a Procedure define in Assembly ?...

Q. How a Procedure define in Assembly ? Procedure is defined within source code by placing a directive of form: PROC A procedure is terminated using: ENDP The

What is parallel balance point, Q. What is Parallel Balance Point? In ...

Q. What is Parallel Balance Point? In order to execute parallel algorithm on parallel computer K processors are necessary. It should be noted that given input is allocated to

Define physical context, Question : Context aware mobile web applicatio...

Question : Context aware mobile web applications are the important to achieve ubiquity, device independence and personalization. The context provides detailed information about

C programming, write a program to find the area under the curve y=f(x) betw...

write a program to find the area under the curve y=f(x) between x=a and x=b,integrate y=f(x) between the limits of a and b

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