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Consider the following implementation of a spinlock semaphore used with a round-robin preemptive scheduler
a) The compiler generated this code for OS_Signal
Are there any critical sections in OS_Signal? That is, can two threads both call OS_ Signal? Justify your answer.
b) Design a new op-code for the 9S12, and use it to rewrite OS_Wait so the spin lock semaphore can be executed without critical sections and without disabling interrupts. Be VERY specific about what the new instruction does (e.g., addressing modes, condition code bits). The 16-bit pointer, semaPt, will be in Register D when OS_Wait is called.
refrigerant 22 enters the compressor of an ideal vapor compression refrigeration system as saturated vapor at 2408c
a c-130 pilot desires to fly a low-level navigation mission at 4 n milesmin 240 kn ground speed. winds are forecast out
the coefficient of friction between the load and the flat-bed trailer shown is 0.4. knowing that the speed of the rig
What is the effective strain, ε, caused by the rolling? What strain in a tension test (if it were possible) would cause the same amount of strain hardening?
The heating is to be done in a mixing tank by direct injection of the steam, all of which condenses. Determine the two inlet mass flows needed to meet the desired hot water flow rate.
an aqueous homogeneous reactor is composed of a homogeneous mixture of uranium nitrite uo2no32 2.81 gcm3 and heavy
At a certain location, wind is blowing steadily at 10 m/s. Determine the mechanical energy of air per unit mass and the power generation potential of a wind turbine with 60 m diameter blades at that location. Take the air density to be 1.25 kg/m.
What are the forces acting on workpiece during turning process. how workpiece should be clamp
Find ∂f/∂y and ∂f/∂z in terms of the partial derivatives of f with respect to spherical polar coordinates (r, θ, φ) (see Example 3.5).
a piston-cylinder device contains 1 kg of h2o. the water is at 800oc and a pressure of 20 mpa. heat transfer occurs
an aluminum pan whose thermal conductivity is 237 has a flat bottom whose diameter
a pilot flying his ultralight aircraft at a speed of 60 mph. under standard atmospheric conditions what would be the
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