Search results
Results from the WOW.Com Content Network
In Java, the Object class provides the wait() and notify() methods to assist with guarded suspension. In the implementation below, originally found in Kuchana (2004), if there is no precondition satisfied for the method call to be successful, then the method will wait until it finally enters a valid state.
Below is an example written in Java that takes keyboard input and handles each input line as an event. When a string is supplied from System.in , the method notifyObservers() is then called in order to notify all observers of the event's occurrence, in the form of an invocation of their update methods.
enter the monitor: enter the method if the monitor is locked add this thread to e block this thread else lock the monitor leave the monitor: schedule return from the method wait c: add this thread to c.q schedule block this thread notify c: if there is a thread waiting on c.q select and remove one thread t from c.q (t is called "the notified ...
In the Solaris implementation of condition variables, a spurious wakeup may occur without the condition being assigned if the process is signaled; the wait system call aborts and returns EINTR. [2] The Linux p-thread implementation of condition variables guarantees that it will not do that. [3] [4]
The following async method downloads data from a URL using await. Because this method issues a task for each URI before requiring completion with the await keyword, the resources can load at the same time instead of waiting for the last resource to finish before starting to load the next.
For example, BOSH is a popular, long-lived HTTP technique used as a long-polling alternative to a continuous TCP connection when such a connection is difficult or impossible to employ directly (e.g., in a web browser); [16] it is also an underlying technology in the XMPP, which Apple uses for its iCloud push support.
There are several possible solutions, but all solutions require a mutex, which ensures that only one of the participants can change state at once.The barber must acquire the room status mutex before checking for customers and release it when they begin either to sleep or cut hair; a customer must acquire it before entering the shop and release it once they are sitting in a waiting room or ...
History is an example of such: although GWT manages history tokens as users click Back or Forward in the browser, it does not detail how to map history tokens to an application state. GWT applications can be run in two modes: Development mode (formerly Hosted mode): The application runs as Java bytecode within the Java Virtual Machine (JVM). [11]