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1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2017 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // fibonacci.c -- |
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8 | // |
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9 | // Author : Thierry Delisle |
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10 | // Created On : Thu Jun 8 07:29:37 2017 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Thu Jun 8 07:37:12 2017 |
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13 | // Update Count : 5 |
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14 | // |
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15 | |
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16 | #include <fstream> |
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17 | #include <coroutine> |
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18 | |
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19 | coroutine Fibonacci { |
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20 | int fn; // used for communication |
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21 | }; |
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22 | |
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23 | void ?{}( Fibonacci * this ) { |
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24 | this->fn = 0; |
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25 | } |
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26 | |
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27 | void main( Fibonacci * this ) { |
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28 | int fn1, fn2; // retained between resumes |
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29 | this->fn = 0; // case 0 |
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30 | fn1 = this->fn; |
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31 | suspend(); // return to last resume |
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32 | |
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33 | this->fn = 1; // case 1 |
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34 | fn2 = fn1; |
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35 | fn1 = this->fn; |
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36 | suspend(); // return to last resume |
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37 | |
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38 | for ( ;; ) { // general case |
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39 | this->fn = fn1 + fn2; |
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40 | fn2 = fn1; |
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41 | fn1 = this->fn; |
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42 | suspend(); // return to last resume |
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43 | } // for |
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44 | } |
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45 | |
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46 | int next( Fibonacci * this ) { |
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47 | resume( this ); // transfer to last suspend |
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48 | return this->fn; |
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49 | } |
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50 | |
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51 | int main() { |
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52 | Fibonacci f1, f2; |
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53 | for ( int i = 1; i <= 10; i += 1 ) { |
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54 | sout | next( &f1 ) | ' ' | next( &f2 ) | endl; |
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55 | } // for |
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56 | } |
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57 | |
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58 | // Local Variables: // |
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59 | // tab-width: 4 // |
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60 | // compile-command: "cfa fibonacci.c" // |
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61 | // End: // |
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