main
test-branch
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Last change
on this file since 1aaefd4 was ea777aa, checked in by Alex Wilton <awilton@…>, 3 years ago |
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Moved examples, include, build_default.properties, common.xml, and README out from dev.civl.com into the root of the repo.
git-svn-id: svn://vsl.cis.udel.edu/civl/trunk@5704 fb995dde-84ed-4084-dfe6-e5aef3e2452c
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Property mode
set to
100644
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File size:
1.1 KB
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| 1 | #include <pthread.h>
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| 2 |
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| 3 | #define assert(e) { if(!(e)) { ERROR: goto ERROR; (void)0; } }
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| 4 |
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| 5 | int x;
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| 6 | int y;
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| 7 | int b1, b2; // N boolean flags
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| 8 | int X; //variable to test mutual exclusion
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| 9 |
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| 10 | void* thr1(void* arg) {
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| 11 | while (1) {
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| 12 | b1 = 1;
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| 13 | x = 1;
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| 14 | if (y != 0) {
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| 15 | b1 = 0;
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| 16 | while (y != 0) {};
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| 17 | continue;
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| 18 | }
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| 19 | y = 1;
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| 20 | if (x != 1) {
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| 21 | b1 = 0;
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| 22 | while (b2 >= 1) {};
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| 23 | if (y != 1) {
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| 24 | while (y != 0) {};
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| 25 | continue;
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| 26 | }
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| 27 | }
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| 28 | break;
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| 29 | }
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| 30 | // begin: critical section
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| 31 | X = 0;
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| 32 | assert(X <= 0);
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| 33 | // end: critical section
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| 34 | y = 0;
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| 35 | b1 = 0;
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| 36 |
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| 37 | return 0;
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| 38 | }
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| 39 |
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| 40 | void* thr2(void* arg) {
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| 41 | while (1) {
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| 42 | b2 = 1;
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| 43 | x = 2;
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| 44 | if (y != 0) {
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| 45 | b2 = 0;
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| 46 | while (y != 0) {};
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| 47 | continue;
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| 48 | }
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| 49 | y = 2;
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| 50 | if (x != 2) {
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| 51 | b2 = 0;
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| 52 | while (b1 >= 1) {};
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| 53 | if (y != 2) {
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| 54 | while (y != 0) {};
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| 55 | continue;
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| 56 | }
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| 57 | }
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| 58 | break;
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| 59 | }
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| 60 | // begin: critical section
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| 61 | X = 1;
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| 62 | assert(X >= 1);
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| 63 | // end: critical section
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| 64 | y = 0;
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| 65 | b2 = 0;
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| 66 |
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| 67 | return 0;
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| 68 | }
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| 69 |
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| 70 | int main()
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| 71 | {
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| 72 | pthread_t t;
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| 73 |
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| 74 | pthread_create(&t, 0, thr1, 0);
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| 75 | thr2(0);
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| 76 |
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| 77 | return 0;
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| 78 | }
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| 79 |
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