int main()
{
REPORT_MISC("exec_basic_helper main() starting...");
REPORT_END_SUCCESS;
exit(1);
}
void * chase(void * arg) {
int next_mutex_to_acquire = 0;
int highest_mutex_released = -1;
// we don't want behavior to be determined by thread id policy, use
// 0..n_chasethreads-1 here (passed in as argument)
int my_creation_number = (int)arg;
char buf[80];
snprintf(buf, sizeof (buf), "Starting chase thread with creation number %d",
my_creation_number);
REPORT_MISC(buf);
while (highest_mutex_released < n_mutexes - 1) {
// if we haven't acquired mutexes all the way to the end of the array,
// acquire one more
if (next_mutex_to_acquire < n_mutexes) {
mutex_lock(&(mtxs[next_mutex_to_acquire++]));
}
// TODO: here's the point that we 'periodically do something' such as
// sleep() or yield()
if (((my_creation_number % STUPID_MAGIC_CONSTANT) == 0)
&& ((highest_mutex_released % STUPID_MAGIC_CONSTANT) == 0)) {
yield(-1);
}
// we only start releasing mutexes when we've acquired a total of
// "footprint" mutexes
if (next_mutex_to_acquire >= footprint) {
mutex_unlock(&(mtxs[++highest_mutex_released]));
}
}
snprintf(buf, sizeof (buf),
"Successful finish for thread with creation number %d",
my_creation_number);
REPORT_MISC(buf);
return (void *)1;
}
