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The elements of the array are all initialized to 0 except the first element which is takes the value 1, thus ensuring successful lock acquisition by the first thread in the queue. On a lock release, the hold is passed to the next thread in queue by setting the next element of the array to 1. The requests are granted to the threads in FIFO ordering.
Resource acquisition is initialization (RAII) [1] is a programming idiom [2] used in several object-oriented, statically typed programming languages to describe a particular language behavior. In RAII, holding a resource is a class invariant , and is tied to object lifetime .
A programmable logic array (PLA) is a kind of programmable logic device used to implement combinational logic circuits. The PLA has a set of programmable AND gate planes, which link to a set of programmable OR gate planes, which can then be conditionally complemented to produce an output.
Systolic arrays were first used in Colossus, which was an early computer used to break German Lorenz ciphers during World War II. [1] Due to the classified nature of Colossus, they were independently invented or rediscovered by H. T. Kung and Charles Leiserson who described arrays for many dense linear algebra computations (matrix product ...
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It violates condition 1, and thus introduces a flow dependency. 1: function NoDep(a, b) 2: c := a * b 3: d := 3 * b 4: e := a + b 5: end function In this example, there are no dependencies between the instructions, so they can all be run in parallel. Bernstein's conditions do not allow memory to be shared between different processes.
A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the input and output phase in lockstep also implies keeping the input and output frequencies the same, thus a phase-locked loop can also track an input frequency.
Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (), [16] meaning that compiled Java code can run on all platforms that support Java without the need to recompile. [17]