| 1 | // 
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 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 | // io-acquire.cfa -- 
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| 8 | // 
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| 9 | // Author           : Peter A. Buhr
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| 10 | // Created On       : Mon Mar  1 18:40:09 2021
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| 11 | // Last Modified By : Peter A. Buhr
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| 12 | // Last Modified On : Tue Apr 27 11:49:34 2021
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| 13 | // Update Count     : 18
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| 14 | // 
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| 15 | 
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| 16 | #include <fstream.hfa>
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| 17 | #include <thread.hfa>
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| 18 | 
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| 19 | thread T {};
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| 20 | void main( T & ) {
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| 21 |         // output from parallel threads should not be scrambled
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| 22 | 
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| 23 |         for ( 100 ) {                                                                           // local protection
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| 24 |                 sout | acquire | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
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| 25 |         }
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| 26 |         {                                                                                                       // global protection (RAII)
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| 27 |                 osacquire acq = { sout };
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| 28 |                 for ( 100 ) {
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| 29 |                         sout | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
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| 30 |                 }
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| 31 |         }
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| 32 |         {                                                                                                       // duplicate protection demonstrating recursive lock
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| 33 |                 osacquire acq = { sout };
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| 34 |                 for ( 100 ) {
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| 35 |                         osacquire acq = { sout };
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| 36 |                         sout | acquire | 1 | 2 | 3 | 4 | 5 | acquire | 6 | 7 | 8 | 9;
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| 37 |                         sout | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
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| 38 |                 }
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| 39 |         }
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| 40 | 
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| 41 |         // above output used as input to parallel threads 
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| 42 | 
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| 43 |         int a, b, c, d, e, f, g, h, i;
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| 44 |         for ( 100 ) {                                                                           // local protection
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| 45 |                 sin | acquire | a | b | c | d | e | f | g | h | i;
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| 46 |         }
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| 47 |         {                                                                                                       // global protection (RAII)
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| 48 |                 isacquire acq = { sin };
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| 49 |                 for ( 100 ) {
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| 50 |                         sin  | a | b | c | d | e | f | g | h | i;
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| 51 |                 }
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| 52 |         }
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| 53 |         {                                                                                                       // duplicate protection demonstrating recursive lock
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| 54 |                 isacquire acq = { sin };
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| 55 |                 for ( 100 ) {
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| 56 |                         isacquire acq = { sin };
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| 57 |                         sin | acquire | a | b | c | d | e | acquire | f | g | h | i;
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| 58 |                         sin | a | b | c | d | e | f | g | h | i;
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| 59 |                 }
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| 60 |         }
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| 61 | }
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| 62 | int main() {
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| 63 |         processor p;
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| 64 |         T t[5];
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| 65 | } 
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| 66 | 
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| 67 | // Local Variables: //
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| 68 | // tab-width: 4 //
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| 69 | // compile-command: "cfa io-acquire.cfa" //
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| 70 | // End: //
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