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Commit skeleton code for the threaded allocation class
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68
threadedAllocation.java
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68
threadedAllocation.java
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class threadedAllocation extends baseAlgorithm
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{
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threadedAllocation {
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/* Constructor specific for this algorithm
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*
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* Start the threaded garbage collector, and then begin
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* our actual operations */
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}
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int locateBlock(int blockSize){
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/* Locate a block of size blockSize, return -1 if can't find one */
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//Find an open location
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int memoryLoc = 0;
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while (memoryLoc < this.memoryBlock.length)
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{
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if (memoryBlock[memoryLoc] != 0)
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//Block isn't free
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continue;
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//One location is free, find out total size free
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//This loop breaks either when we've found the size we need, or
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//we found the beginning of the next block.
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int beginningLoc = memoryLoc;
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int free = 0;
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while (free < blockSize && memoryBlock[memoryLoc] == 0)
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{
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memoryLoc += 1;
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free += 1;
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}
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if (free >= blockSize)
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return beginningLoc;
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}
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//Once the above loop has exited, we've run out of locations to check
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return -1;
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}
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void allocate(int jobID, int jobSize, int jobLength ){
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/* Over-rides allocate() of baseAlgorithm */
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//Loop until we get a block big enough for our job
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// Note that this assumes we're not going to race against ourselves
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int beginningLocation = locateBlock( jobSize );
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while (beginningLocation == -1)
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beginningLocation = locateBlock( jobSize );
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//We've got a location, mark it as filled, and start the job.
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for (int x = 0; x < jobSize; x++)
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{
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memoryBlock[beginningLocation + x] = jobID;
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}
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//TODO: Code to start the job
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}
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void deallocate(int jobSize, int beginningLocation){
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/* Over-rides deallocate() of baseAlgorithm */
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//Simple algorithm, basically just mark the memory as cleared.
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for (int x = 0; x < jobSize; x++)
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{
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memoryBlock[beginningLocation + x] = 0;
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}
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}
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}
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8
threadedAllocationGarbage.java
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8
threadedAllocationGarbage.java
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class threadedAllocationGarbage
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{
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/* This class implements the garbage collecting functionality for the
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* threaded allocation algorithm.
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* It had to be put in a separate class since it implements a threading
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* interface */
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}
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