1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | #include <unistd.h> #include <pthread.h> #include <string.h> pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t mutex2 = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t mutex3 = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t mutex4 = PTHREAD_MUTEX_INITIALIZER; static int sequence1 = 0; static int sequence2 = 0; int func1() { pthread_mutex_lock(&mutex1); ++sequence1; sleep(1); pthread_mutex_lock(&mutex2); ++sequence2; pthread_mutex_unlock(&mutex2); pthread_mutex_unlock(&mutex1); return sequence1; } int func2() { pthread_mutex_lock(&mutex2); ++sequence2; sleep(1); pthread_mutex_lock(&mutex1); ++sequence1; pthread_mutex_unlock(&mutex1); pthread_mutex_unlock(&mutex2); return sequence2; } void* thread1(void* arg) { while (1) { int iRetValue = func1(); if (iRetValue == 100000) { pthread_exit(NULL); } } } void* thread2(void* arg) { while (1) { int iRetValue = func2(); if (iRetValue == 100000) { pthread_exit(NULL); } } } void* thread3(void* arg) { while (1) { sleep(1); char szBuf[128]; memset(szBuf, 0, sizeof(szBuf)); strcpy(szBuf, "thread3"); } } void* thread4(void* arg) { while (1) { sleep(1); char szBuf[128]; memset(szBuf, 0, sizeof(szBuf)); strcpy(szBuf, "thread3"); } } int main() { pthread_t tid[4]; if (pthread_create(&tid[0], NULL, &thread1, NULL) != 0) { _exit(1); } if (pthread_create(&tid[1], NULL, &thread2, NULL) != 0) { _exit(1); } if (pthread_create(&tid[2], NULL, &thread3, NULL) != 0) { _exit(1); } if (pthread_create(&tid[3], NULL, &thread4, NULL) != 0) { _exit(1); } sleep(5); //pthread_cancel(tid[0]); pthread_join(tid[0], NULL); pthread_join(tid[1], NULL); pthread_join(tid[2], NULL); pthread_join(tid[3], NULL); pthread_mutex_destroy(&mutex1); pthread_mutex_destroy(&mutex2); pthread_mutex_destroy(&mutex3); pthread_mutex_destroy(&mutex4); return 0; } |
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