From 8c238590dc9ad996710abc28a1868e9f1a41ab0a Mon Sep 17 00:00:00 2001 From: rpj Date: Sat, 16 Oct 1999 16:24:42 +0000 Subject: 1999-10-17 Ross Johnson * rwlock.c (pthread_rwlock_destroy): Add cast to remove compile warning. * condvar.c (pthread_cond_broadcast): Only release semaphores if there are waiting threads. 1999-10-15 Ross Johnson * condvar.c (cond_wait_cleanup): New static cleanup handler for cond_timedwait; (cond_timedwait): pthread_cleanup_push args changed; canceling a thread while it's in pthread_cond_wait will now decrement the waiters count and cleanup if it's the last waiter. - Lorin Hochstein and Peter Slacik ; the last waiter will now reset the CV's wasBroadcast flag - Graham Dumpleton . --- tests/condvar9.c | 231 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 231 insertions(+) create mode 100644 tests/condvar9.c (limited to 'tests/condvar9.c') diff --git a/tests/condvar9.c b/tests/condvar9.c new file mode 100644 index 0000000..49a8cab --- /dev/null +++ b/tests/condvar9.c @@ -0,0 +1,231 @@ +/* + * File: condvar9.c + * + * Test Synopsis: + * - Test multiple pthread_cond_broadcasts with thread cancelation. + * + * Test Method (Validation or Falsification): + * - Validation + * + * Requirements Tested: + * - + * + * Features Tested: + * - + * + * Cases Tested: + * - + * + * Description: + * - Make NUMTHREADS threads wait on CV, cancel one, broadcast signal them, + * and then repeat. + * + * Environment: + * - + * + * Input: + * - None. + * + * Output: + * - File name, Line number, and failed expression on failure. + * - No output on success. + * + * Assumptions: + * - + * + * Pass Criteria: + * - Process returns zero exit status. + * + * Fail Criteria: + * - Process returns non-zero exit status. + */ + +#include "test.h" +#include + +/* + * Create NUMTHREADS threads in addition to the Main thread. + */ +enum { + NUMTHREADS = 9 +}; + +typedef struct bag_t_ bag_t; +struct bag_t_ { + int threadnum; + int started; + /* Add more per-thread state variables here */ +}; + +static bag_t threadbag[NUMTHREADS + 1]; + +typedef struct cvthing_t_ cvthing_t; + +struct cvthing_t_ { + pthread_cond_t notbusy; + pthread_mutex_t lock; + int shared; +}; + +static cvthing_t cvthing = { + PTHREAD_COND_INITIALIZER, + PTHREAD_MUTEX_INITIALIZER, + 0 +}; + +static pthread_mutex_t start_flag = PTHREAD_MUTEX_INITIALIZER; + +static struct timespec abstime = { 0, 0 }; + +static int awoken; + +static void * +mythread(void * arg) +{ + bag_t * bag = (bag_t *) arg; + + assert(bag == &threadbag[bag->threadnum]); + assert(bag->started == 0); + bag->started = 1; + + /* Wait for the start gun */ + assert(pthread_mutex_lock(&start_flag) == 0); + assert(pthread_mutex_unlock(&start_flag) == 0); + + assert(pthread_mutex_lock(&cvthing.lock) == 0); + + /* + * pthread_cond_timedwait is a cancelation point and we + * going to cancel one deliberately. + */ + pthread_cleanup_push(pthread_mutex_unlock, (void *) &cvthing.lock); + + while (! cvthing.shared > 0) + assert(pthread_cond_timedwait(&cvthing.notbusy, &cvthing.lock, &abstime) == 0); + + pthread_cleanup_pop(0); + + assert(cvthing.shared > 0); + + awoken++; + + assert(pthread_mutex_unlock(&cvthing.lock) == 0); + + return 0; +} + +int +main() +{ + int failed = 0; + int i; + int first, last; + int canceledThreads = 0; + pthread_t t[NUMTHREADS + 1]; + +#if defined(__MINGW32__) + struct timeb currSysTime; +#else + struct _timeb currSysTime; +#endif + const DWORD NANOSEC_PER_MILLISEC = 1000000; + + assert((t[0] = pthread_self()) != NULL); + + assert(cvthing.notbusy == PTHREAD_COND_INITIALIZER); + + assert(cvthing.lock == PTHREAD_MUTEX_INITIALIZER); + + _ftime(&currSysTime); + + abstime.tv_sec = currSysTime.time; + abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm; + + abstime.tv_sec += 5; + + assert((t[0] = pthread_self()) != NULL); + + awoken = 0; + + for (first = 1, last = NUMTHREADS / 2; + first < NUMTHREADS; + first = last + 1, last = NUMTHREADS) + { + assert(pthread_mutex_lock(&start_flag) == 0); + + for (i = first; i <= last; i++) + { + threadbag[i].started = 0; + threadbag[i].threadnum = i; + assert(pthread_create(&t[i], NULL, mythread, (void *) &threadbag[i]) == 0); + assert(pthread_detach(t[i]) == 0); + } + + /* + * Code to control or munipulate child threads should probably go here. + */ + cvthing.shared = 0; + + assert(pthread_mutex_unlock(&start_flag) == 0); + + /* + * Give threads time to start. + */ + Sleep(1000); + + assert(pthread_mutex_lock(&cvthing.lock) == 0); + + cvthing.shared++; + + assert(pthread_mutex_unlock(&cvthing.lock) == 0); + + assert(pthread_cancel(t[(first + last) / 2]) == 0); + canceledThreads++; + + assert(pthread_cond_broadcast(&cvthing.notbusy) == 0); + + /* + * Give threads time to complete. + */ + Sleep(1000); + } + + + /* + * Standard check that all threads started. + */ + for (i = 1; i <= NUMTHREADS; i++) + { + failed = !threadbag[i].started; + + if (failed) + { + fprintf(stderr, "Thread %d: started %d\n", i, threadbag[i].started); + } + } + + /* + * Cleanup the CV. + */ + + assert(pthread_mutex_destroy(&cvthing.lock) == 0); + + assert(cvthing.lock == NULL); + + assert(pthread_cond_destroy(&cvthing.notbusy) == 0); + + assert(cvthing.notbusy == NULL); + + assert(!failed); + + /* + * Check any results here. + */ + + assert(awoken == NUMTHREADS - canceledThreads); + + /* + * Success. + */ + return 0; +} -- cgit v1.2.3