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//! [0]
while True:
mutex.lock()
keyPressed.wait(mutex)
do_something()
mutex.unlock()
//! [0]
//! [1]
while True:
getchar()
keyPressed.wakeAll()
//! [1]
//! [2]
while True:
mutex.lock()
keyPressed.wait(&mutex)
count += 1
mutex.unlock()
do_something()
mutex.lock()
count -= 1
mutex.unlock()
//! [2]
//! [3]
while True:
getchar()
mutex.lock()
# Sleep until there are no busy worker threads
while count > 0:
mutex.unlock()
sleep(1)
mutex.lock()
keyPressed.wakeAll()
mutex.unlock()
//! [3]
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