source: doc/papers/concurrency/examples/Fib1.c @ 466fa01

arm-ehenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change on this file since 466fa01 was 466fa01, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago

add diagrams and example programs

  • Property mode set to 100644
File size: 612 bytes
Line 
1#include <stdio.h>
2
3#define FibCtor { 0, 0, NULL }
4typedef struct {
5        int fn1, fn2;
6        void * next;
7} Fib;
8
9int fib( Fib * f ) {
10        if ( __builtin_expect(f->next != 0, 1) ) goto *f->next;
11  s1:
12        f->fn1 = 0;
13        f->next = &&s2;
14        return f->fn1;
15  s2:
16        f->fn2 = f->fn1;
17        f->fn1 = 1;
18        f->next = &&s3;
19        return f->fn1;
20  s3:;
21        int fn = f->fn1 + f->fn2;
22        f->fn2 = f->fn1;
23        f->fn1 = fn;
24        return fn;
25}
26int main() {
27        Fib f1 = FibCtor, f2 = FibCtor;
28        for ( int i = 0; i < 10; i += 1 ) {
29                printf( "%d %d\n", fib( &f1 ), fib( &f2 ) );
30        }
31}
32
33// Local Variables: //
34// tab-width: 4 //
35// compile-command: "gcc-8 Fib1.c" //
36// End: //
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