likely/unlikely macros

Title: likely/unlikely macros


/* Unlikely : #define unlikely(x) __builtin_expect((x),0)
* if (__builtin_expect (x, 0))
* foo ();
* [This] would indicate that we do not expect to call `foo’, since we
* expect `x’ to be zero.

int main(int argc, char **argv)
int x = 1;

if (__builtin_expect(x, 0)) {
printf(“Value of x was expected to be 0 but x is =%d\n”, x);
return 0;

Reference URL:

Android Android Commands Android Java Applications Application Libraries Application Stack / User Interface Bash / Shell Scripts Commands and Packages Compilation Content Management System - CMS Core Kernel C Programs Development & Build Development Environment Setup Errors & Failures Flutter git Go Language Programs Hardware Platforms HTML JAVA Programs Kernel & Device Drivers Linux, OS Concepts and Networking Linux Device Drivers Linux Host, Ubuntu, SysAdmin Linux Kernel Linux Networking Middleware Libraries, HAL Monetization / Google AdSense Multimedia - Audio, Video, Images NDK / Middleware / HAL OS Concepts PHP Programming Languages RaspberryPi Scripting and Automation Search Engine Optimisation ( SEO ) Social Media Socurce Code Management ( SCM ) System Administration, Security Testing and Debugging Uncategorized User Interface Web design and development Wordpress Yocto / Bitbake / Openembedded

Leave a Reply / Ask Question