superclass for all monitor control policy objects. PRIORITYCEILINGEMULATION 87 6.1.1 Constructors public Monitor ontrt () 6.1.2 Methods public static void setMonitor Contr l(MonitorControl8 policy) Control the default monitor behavior for object monitors used by synchronized statements and methods in the system. The type of the policy object determines the type of behavior. Conforming implementations must support priority ceiling emulation and priority inheritance for fixed priority preemptive threads. Parameters: policy - The new monitor control policy. If null nothing happens. public static void setMonitor Contr l(java.lang.Object monitor MonitorControl 8 policy) Has the same effect as setMonitorControl(), except that the policy only affects the indicated object monitor. Parameters: monitor - The monitor for which the new policy will be in use. The policy will take effect on the first attempt to lock the monitor after the completion of this method. If null nothing wi...

Real-time Java is quickly emerging as a platform for building safety-critical embedded systems. The real-time variants of Java, including [8, 15], are attractive alternatives to Ada and C since they provide a cleaner, simpler, and safer programming model. Unfortunately, current real-time Java implementations have trouble scaling down to very hard real-time embedded settings, where memory is scarce and processing power is limited. In this paper, we describe the architecture of the Fiji VM, which enables vanilla Java applications to run in very hard environments, including booting on bare hardware with only very rudimentary operating system support. We also show that our minimalistic approach delivers comparable performance to that of server-class production Java Virtual Machine implementations. 1.

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