C Tutorial

C Tutorial C Language Environment Setup Execution flow of C program C printf and Scanf C Data type C Token Variable in C Operators in C Comments in C Escape Sequence in C C – Storage Classes C Decision control statement Loop Statement in C Break, continue and goto statement in C Type Casting in C Function in C Recursion in C String in C C Array Pointer in C Dynamic memory allocation C –Structure Nested Structure in C Union in C File Handling in C C pre-processor Static Function In C Sizeof In C Selection Sort In C Scope Of Variables In C Runtime Vs Compile Time In C Random Access Lseek In C Queue Implementation In C Pseudo Code In C Prototype In C Pointer To Pointer In C Pointer Arithmetic In C Passing Array To Function In C Null Character In C Merge Sort In C Macros In C Library Functions In C Memory Leak In C Int In C Goto And Labels In C Fibonacci Series In C Fflush In C Derived Data Types In C Data Types In C Const Vs Volatile In C Character Set In C Character Class Tests In C Calloc In C C Pointers Arrays In C Include In C Clrscr In C C Vs Java String Literals In C Types Of Pointers In C Variables In C Volatile In C Why C Is A Middle Level Language Infix To Postfix Program In C Ceil function in C LCM of two numbers in C Quick sort in C Static in C function pointer as argument in C Top Array Keywords in C Add two numbers using the function in C Armstrong program in C using function Array, Declaring Arrays and Array Initialization Limitations of Inline Function in C Merge and Merge sort with example in C Do-While Loop in C For Loop in C While-Loop in C Difference between while and do-while loop in C Array Of Structures in C Data Structures And Algorithms in C Types Of Structures In C How to Avoid Structure Padding in C Use of Structure in C Do WHILE LOOP in C Programming Examples For Loop in C Programming Examples Entry Control Loop in C Exit control loop in C Infinite loop in C Nested loop in C pow() function in C String Handling functions in C Prime Number code in C Factorial Program in C using For Loop Factorial Program in C Using While Loop Fibonacci Series in C Using For Loop Fibonacci series in C using while loop Prime Number Program in C using for Loop While Loop in C programming examples Built-in functions in C Assert() Function C vs Java Strings Call Back Function in Embedded C Else If Ladder fgets() function Ftell() Function getc() function getch() function gets() function Heap Sort Nested if-else statement Pi() Function Positioning of file Write() function abs() function in C Attributes in C C program to find factorial of a number using Recursion Ferror() in c fopen() function in C Fibonacci series program in C using Recursion Formatted Input and output function in C Snake Game in C User Defined Functions in C Beep() function in C Cbrt() function in C Hook() function in C Isalnum() function in C C Program to find the Roots of a Quadratic Equation C Switch Statements Difference between rand() and srand() function in C Difference between while and for loop in C Doubly Linked list in C Example of Iteration in C How to use atoi() function in C How to use floor() function in C How to use sine() function in C How to use Typedef Struct in C Integer Promotions in C C Program Swap Numbers in cyclic order Using Call by Reference C Program to Find Largest Number Using Dynamic Memory Allocation C Program to Find the Largest Number using Ternary Operator C/C++ Program to Find the Size of int, float, double and char Find the Largest Three Distinct Elements in an Array using C/C++ Loop Questions in C Modulus on Negative Numbers in C Multiplication table program in C using For loop Nested Loops in C Programming Examples C Program for Mean and Median of an Unsorted Array Results of Comparison Operations in C and C++ Reverse a Stack using Recursion in C Simple hash() function in C strcat() Function in C Sum of N numbers in C using For loop Use of free() function in C Write a program that produces different results in C and C++ C Function Argument and Return Values Keywords in C Bank management system in C Calendar application in C Floor() Function in C Free() Function in C How to delete a file in C How to move a text in C Remove an element from an array in C Unformatted input() and output() function in C What are linker and loader in C fork() in C GCD program in C Branching Statements in C Comma Operator in C Control statement in C Double Specifier in C How to create a binary file in C Long int in C Palindrome Number in C Pure Virtual Function in C Run Time Polymorphism in C Types of Array in C Types of Function in C What is a buffer in C What is required in each C Program Associativity of Operators in C Bit Stuffing Program in C Actual and Formal Parameters Addition of two Numbers in C Advantages of function in C

Limitations of Inline Function in C

The compiler is unable to conduct inlining in two instances. It just accepts the inline definitions and produces space for the function in the same way it does for a non-inline function in these circumstances. The linker is advised to overlook multiple definitions if it has to do this in many translation areas (which would ordinarily result in a multiple definition error).

If the function is too intricate, the compiler will not be able to inline it. This depends on the compiler, but at the point when most compilers surrender, the inline is unlikely to save users any time.

In general, any looping is too difficult to extend as an inline. Looping definitely takes a lot longer inside the function than the overhead of the function call, if one thinks about it. The compiler will probably have no issue inlining the function if it is just a collection of basic statements.

If there are several statements, the overhead of the function call will be much lower than the cost of executing the body. And keep in mind that when one executes a big inline function, the full function body is put instead of each call, so one might easily end up with code bloat without seeing any performance gains. 

If the compiler needs to generate an address, it will allocate memory for the function code and utilize the address. The compiler will very probably inline the code if an address isn't required. If the function's address is given implicit or explicit, the compiler cannot execute inlining.

It's important to understand that an inline is merely a suggestion to the compiler; the compiler is not required to inline anything.

A decent compiler will inline small, basic routines, but too intricate inlines will be ignored. This will give the user the desired results: real function call semantics combined with macro efficiency.

Increase function size to the point where it won't fit in the cache, resulting in many cache misses.

 If the number of variables that will use the register rises after inlining, the overhead on registered variable resource use may increase.

It may result in compilation overhead since all calling locations will be compiled if code inside an inline function is changed.

If used in a header file, it will increase the size of the file and may make it illegible. Using too many inline functions can result in a higher code size, which can cause memory thrashing. As the number of page faults increases, your program's performance suffers. It is ineffective in embedded systems where big binary sizes are undesirable due to memory limits.

As the body of an inline function is added in the place of a function call, the executable file size grows, and more memory is required. Not suited for recursive function definitions that are excessively long and intricate.

As we have seen disadvantages / limitations of using inline function now let’s see some advantages of inline function.

  • It does not necessitate the overhead of invoking functions.
  • It also reduces the overhead of variables being pushed and popped on the stack during function calls.
  • It also reduces the overhead of a function's return call.
  • It uses an instruction cache to promote the locality of reference.
    Because inline functions produce less code than function calls outline and return, they may be beneficial for embedded devices (if they are small).
  • The speed with which a program is executed increases. It is possible to generate efficient code. The program's readability improves.



ADVERTISEMENT
ADVERTISEMENT