How Not to Program in C++

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40 /************************************************

41 * process_2 -- Second process of two. *

42 * *

43 * Grab both resources and then do the work. *

44 * (but slightly different work from *

45 * process_1) *

46 ************************************************/

47 static void process_2(void)

48 {

49 while (1) {

50 wait_for_work();

51

52 pthread_mutex_lock(&resource2);

53 pthread_mutex_lock(&resource1);

54

55 do_work();

56

57 pthread_mutex_unlock(&resource1);

58 pthread_mutex_unlock(&resource2);

59 }

60 }

61

62 int main()

63 {

64 int status; /* Status of last system call */

65

66 /* Information on the status thread */

67 pthread_t thread ...