uk.ac.man.cs.rainbow.simulator.rasm
Class Parallel

java.lang.Object
  |
  +--uk.ac.man.cs.rainbow.simulator.Instruction
        |
        +--uk.ac.man.cs.rainbow.simulator.rasm.Parallel

All Implemented Interfaces:

Serializable

public class Parallel

extends Instruction

Execute in parallel.

Executes the code starting at addr₀ in parallel with the code starting at addr₁ in parallel with ... in parallel with the code starting at addr_n-1. Execution resumes at the instruction following this one once both of those parallel executions have terminated.

Each of the executing sub-threads has a copy of the (top-most) stack frame (after all the addresses have been popped) as its sole stack frame, and after the termination of all of them, the stack frame of the parent thread will have the same stack frame at the top as all of the sub-threads received, though it will also have all the stack frames below the current one as well, unlike the sub-threads. Thus, it is a checked error for a sub-thread to attempt to return from its initial stack frame, even if the parent of that thread was not in its topmost frame. (In other words, the number of return instructions performed by a thread at any point must not exceed the number of call instructions performed by that thread - a sane restriction, in my opinion.)

v₀ ... v_m addr₀ ... addr_n-1 n v₀ ... v_m

See Also:

Exit, Serialized Form

Inner classes inherited from class uk.ac.man.cs.rainbow.simulator.Instruction

Instruction.MACRO

Constructor Summary

Parallel()

Parallel(RASMCode code)

Method Summary

protected boolean	execute(RASMThread thread) Make this instruction execute in the given context.
String	toString()

Methods inherited from class uk.ac.man.cs.rainbow.simulator.Instruction

addClass, getInstruction, getInstruction, getInstruction

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Parallel

public Parallel()

Parallel

public Parallel(RASMCode code)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

execute

protected boolean execute(RASMThread thread)
                   throws RASMThread.Exception

Description copied from class: Instruction

Make this instruction execute in the given context.

Overrides:

execute in class Instruction

Following copied from class: uk.ac.man.cs.rainbow.simulator.Instruction

Throws:

RainbowException - All sorts of things can go wrong during execution...