Semaphore

This class represents a general counting semaphore as concieved by Edsger Dijkstra. As per Mesa type monitors however, "signal" has been replaced with "notify" to indicate that control is not transferred to the waiter when a notification is sent.

class Semaphore {

this(uint count);

~this();

void wait();

bool wait(double period);

void notify();

bool tryWait();

}

Constructors

this this(uint count): Initializes a semaphore object with the specified initial count.

Destructor

~this ~this(): Undocumented in source.

Members

Functions

notify void notify(): Atomically increment the current count by one. This will notify one waiter, if there are any in the queue.
tryWait bool tryWait(): If the current count is equal to zero, return. Otherwise, atomically decrement the count by one and return true.
wait void wait(): Wait until the current count is above zero, then atomically decrement the count by one and return.
wait bool wait(double period): Suspends the calling thread until the current count moves above zero or until the supplied time period has elapsed. If the count moves above zero in this interval, then atomically decrement the count by one and return true. Otherwise, return false. The supplied period may be up to a maximum of (uint.max - 1) milliseconds.

Semaphore

Constructors

Destructor

Members

Functions

Meta

Source