source:
doc/papers/concurrency/examples/Fib3.c
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fe18b46
Last change on this file since fe18b46 was a573c22, checked in by , 5 years ago | |
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1 | #include <stdio.h> |
2 | |
3 | typedef struct { |
4 | int restart, fn1, fn; |
5 | } Fib; |
6 | #define FibCtor { 0, 1, 0 } |
7 | |
8 | Fib * comain( Fib * f ) { |
9 | static void * states[] = {&&s0, &&s1}; |
10 | goto *states[f->restart]; |
11 | s0: f->restart = 1; |
12 | for ( ;; ) { |
13 | return f; |
14 | s1:; int fn = f->fn + f->fn1; |
15 | f->fn1 = f->fn; f->fn = fn; |
16 | } |
17 | } |
18 | int main() { |
19 | Fib f1 = FibCtor, f2 = FibCtor; |
20 | for ( int i = 0; i < 10; i += 1 ) |
21 | printf( "%d %d\n", comain( &f1 )->fn, comain( &f2 )->fn ); |
22 | } |
23 | |
24 | // Local Variables: // |
25 | // tab-width: 4 // |
26 | // compile-command: "gcc-8 Fib3.c" // |
27 | // End: // |
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