After applying semaphore, the code still doesn't work as expected
Date : March 29 2020, 07:55 AM
should help you out The clang error is because ThreadAdd is declared as void * and doesn't return anything. Just return 0.
One issue is that sem_wait and sem_post can fail. In that case, they return -1 and you need to check errno for the cause. Your code looked okay to me so I tried it on two machines: - SE Linux, worked just fine - Mac, sem_wait failed.
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Java monitor instead of binary semaphore
Tag : java , By : abuiles
Date : March 29 2020, 07:55 AM
will be helpful for those in need Your locking is too coarse. As a general pattern, unless you have very exceptional circumstances, all locking should be of the form: lock.lock();
try {
....
} finally {
lock.unlock();
}
public void enter(){
lock.lock();
try {
while(isOccupied)
unoccupied.await();
isOccupied = true;
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
public void leave(){
lock.lock();
try {
isOccupied = false;
unoccupied.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}
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Monitor (semaphore) in java
Tag : java , By : Guy Kastenbaum
Date : March 29 2020, 07:55 AM
To fix the issue you can do Extracting from Java docs,
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Turning off monitor with JNA in Java doesn't work as expected
Tag : java , By : Nathan Good
Date : March 29 2020, 07:55 AM
hop of those help? It's possible that "doesn't work as expected" means your expectations are wrong. Of note, there are some problems with the linked code, which I assume you used verbatim. The SendMessage function is mapped twice. The first mapping is correct, but never used: LRESULT SendMessageA(HWND paramHWND, int paramInt, WPARAM paramWPARAM,
LPARAM paramLPARAM);
LRESULT SendMessageA(HWND paramHWND, int paramInt, int paramInt2,
LPARAM paramLPARAM);
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IllegalMonitorException using Semaphore and Monitor in Java
Date : March 29 2020, 07:55 AM
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