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#include <iostream>
#include "config.h"
#include "thread.h"
#include "rwmutex.h"
#include "progressthread.h"
using namespace std;
int MyThread(Thread *t,void *ud)
{
RWMutex *mutex=(RWMutex *)ud;
cerr << "Subthread attempting write lock" << endl;
if(mutex->AttemptMutex())
{
cerr << "Obtained write-lock" << endl;
mutex->ReleaseMutex();
}
else
cerr << "Subthread Can't get write lock - read lock held elsewhere?" << endl;
mutex->ObtainMutexShared();
cerr << "Got shared mutex" << endl;
cerr << "Sub-thread about to sleep..." << endl;
ProgressThread p(*t);
t->SendSync();
for(int i=0;i<100;++i)
{
usleep(20000);
if(!p.DoProgress())
{
cerr << "Thread cancelled - exiting" << endl;
mutex->ReleaseMutex();
return(0);
}
}
cerr << "Woken up - attempting exclusive lock (with shared lock still held)" << endl;
mutex->ObtainMutex();
cerr << "Subthread got exclusive lock" << endl;
mutex->ObtainMutexShared();
cerr << "Subthread got shared lock (with exclusive lock still held)" << endl;
mutex->ReleaseMutex();
mutex->ReleaseMutex();
t->SendSync();
sleep(5);
mutex->ReleaseMutex();
cerr << "Thread finished sleeping - exiting" << endl;
cerr << "Sub-thread ID: " << pthread_self() << endl;
return(0);
}
int main(int argc, char **argv)
{
RWMutex mutex;
mutex.ObtainMutexShared(); // Get a non-exclusive lock...
cerr << "Got shared lock" << endl;
Thread t(MyThread,&mutex);
t.Start();
t.WaitSync();
mutex.ReleaseMutex();
t.WaitSync();
mutex.ObtainMutexShared();
#if 0
while(!t.TestFinished())
{
cerr << "Thread still running - sleeping for 1 second" << endl;
sleep(1);
cerr << "Sending break..." << endl;
t.Stop();
}
#endif
t.WaitFinished();
cerr << "Done" << endl;
return(0);
}
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