unlikely.c

#include <stdio.h>

#ifndef unlikely
#ifdef __GNUC__
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define unlikely(x) (x)
#endif
#endif

#ifndef likely
#ifdef __GNUC__
#define likely(x) __builtin_expect(!!(x), 1)
#else
#define likely(x) (x)
#endif
#endif

void blas_thread_init(){
  printf("ok\n");
}

void main(int argc, char** argv)
{
  int i=0;

  int blas_server_avail=0;

  blas_server_avail=atoi(argv[1]);

  if(unlikely(blas_server_avail==0)){
    i++;
    blas_thread_init();
  }
    i-=2;
  
  
  printf("%d\n",i);
}