222 lines
4.0 KiB
C
222 lines
4.0 KiB
C
/*
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* File: condvar8.c
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*
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* Test Synopsis:
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* - Test multiple pthread_cond_broadcasts.
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*
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* Test Method (Validation or Falsification):
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* - Validation
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*
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* Requirements Tested:
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* -
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*
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* Features Tested:
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* -
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*
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* Cases Tested:
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* -
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*
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* Description:
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* - Make NUMTHREADS threads wait on CV, broadcast signal them, and then repeat.
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*
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* Environment:
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* -
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*
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* Input:
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* - None.
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*
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* Output:
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* - File name, Line number, and failed expression on failure.
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* - No output on success.
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*
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* Assumptions:
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* -
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*
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* Pass Criteria:
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* - Process returns zero exit status.
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*
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* Fail Criteria:
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* - Process returns non-zero exit status.
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*/
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#include "test.h"
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#include <sys/timeb.h>
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/*
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* Create NUMTHREADS threads in addition to the Main thread.
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*/
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enum {
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NUMTHREADS = 5
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};
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typedef struct bag_t_ bag_t;
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struct bag_t_ {
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int threadnum;
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int started;
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/* Add more per-thread state variables here */
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};
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static bag_t threadbag[NUMTHREADS + 1];
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typedef struct cvthing_t_ cvthing_t;
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struct cvthing_t_ {
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pthread_cond_t notbusy;
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pthread_mutex_t lock;
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int shared;
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};
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static cvthing_t cvthing = {
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PTHREAD_COND_INITIALIZER,
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PTHREAD_MUTEX_INITIALIZER,
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0
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};
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static pthread_mutex_t start_flag = PTHREAD_MUTEX_INITIALIZER;
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static struct timespec abstime = { 0, 0 };
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static int awoken;
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static void *
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mythread(void * arg)
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{
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bag_t * bag = (bag_t *) arg;
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assert(bag == &threadbag[bag->threadnum]);
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assert(bag->started == 0);
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bag->started = 1;
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/* Wait for the start gun */
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assert(pthread_mutex_lock(&start_flag) == 0);
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assert(pthread_mutex_unlock(&start_flag) == 0);
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assert(pthread_mutex_lock(&cvthing.lock) == 0);
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pthread_cleanup_push((__cleanup_routine_type)pthread_mutex_unlock,
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(void *) &cvthing.lock);
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while (! (cvthing.shared > 0))
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assert(pthread_cond_timedwait(&cvthing.notbusy, &cvthing.lock, &abstime) == 0);
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pthread_cleanup_pop(0);
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assert(cvthing.shared > 0);
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awoken++;
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assert(pthread_mutex_unlock(&cvthing.lock) == 0);
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return (void *) 0;
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}
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int
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main()
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{
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int failed = 0;
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int i;
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int first, last;
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pthread_t t[NUMTHREADS + 1];
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struct timeb currSysTime;
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const DWORD NANOSEC_PER_MILLISEC = 1000000;
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assert((t[0] = pthread_self()) != NULL);
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assert(cvthing.notbusy == PTHREAD_COND_INITIALIZER);
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assert(cvthing.lock == PTHREAD_MUTEX_INITIALIZER);
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ftime(&currSysTime);
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abstime.tv_sec = currSysTime.time;
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abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm;
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abstime.tv_sec += 10;
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assert((t[0] = pthread_self()) != NULL);
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awoken = 0;
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for (first = 1, last = NUMTHREADS / 2;
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first < NUMTHREADS;
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first = last + 1, last = NUMTHREADS)
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{
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assert(pthread_mutex_lock(&start_flag) == 0);
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for (i = first; i <= last; i++)
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{
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threadbag[i].started = 0;
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threadbag[i].threadnum = i;
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assert(pthread_create(&t[i], NULL, mythread, (void *) &threadbag[i]) == 0);
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assert(pthread_detach(t[i]) == 0);
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}
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/*
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* Code to control or munipulate child threads should probably go here.
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*/
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cvthing.shared = 0;
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assert(pthread_mutex_unlock(&start_flag) == 0);
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/*
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* Give threads time to start.
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*/
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Sleep(1000);
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assert(pthread_mutex_lock(&cvthing.lock) == 0);
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cvthing.shared++;
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assert(pthread_mutex_unlock(&cvthing.lock) == 0);
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assert(pthread_cond_broadcast(&cvthing.notbusy) == 0);
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/*
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* Give threads time to complete.
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*/
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Sleep(1000);
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assert(awoken == (i - 1));
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}
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/*
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* Standard check that all threads started.
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*/
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for (i = 1; i <= NUMTHREADS; i++)
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{
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failed = !threadbag[i].started;
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if (failed)
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{
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fprintf(stderr, "Thread %d: started %d\n", i, threadbag[i].started);
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}
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}
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/*
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* Cleanup the CV.
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*/
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assert(pthread_mutex_destroy(&cvthing.lock) == 0);
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assert(cvthing.lock == NULL);
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assert(pthread_cond_destroy(&cvthing.notbusy) == 0);
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assert(cvthing.notbusy == NULL);
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assert(!failed);
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/*
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* Check any results here.
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*/
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assert(awoken == NUMTHREADS);
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/*
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* Success.
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*/
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return 0;
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}
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