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/*
* count1.c
*
* Written by Ben Elliston <bje@cygnus.com>.
*
* Description:
* Test some basic assertions about the number of threads at runtime.
*/
#include "test.h"
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_t threads[10];
static unsigned numThreads = 1;
void *
myfunc(void *arg)
{
pthread_mutex_lock(&lock);
numThreads++;
pthread_mutex_unlock(&lock);
Sleep(1000);
return 0;
}
int
main()
{
int i;
int maxThreads = sizeof(threads) / sizeof(pthread_t);
/*
* Spawn ten threads. Each thread should increment the numThreads
* variable, sleep for one second, decrement the variable and then
* exit. The final result of numThreads should be 1 again.
*/
for (i = 0; i < maxThreads; i++)
{
assert(pthread_create(&threads[i], NULL, myfunc, 0) == 0);
}
/*
* Wait for all the threads to exit.
*/
for (i = 0; i < maxThreads; i++)
{
assert(pthread_join(threads[i], NULL) == 0);
assert(pthread_mutex_lock(&lock) == 0);
numThreads--;
assert(pthread_mutex_unlock(&lock) == 0);
}
/*
* Check the number of live threads.
*/
assert(numThreads == 1);
/*
* Success.
*/
return 0;
}
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