User Account

All Pages

Write lock and unlock in assembly language

Assignment Help Assembly Language
Reference no: EM13869487

To make it possible to implement semaphores on a computer with multiple CPUs that share a common memory, computer architects often provide a Test and Set Lock in- struction. TSL X tests the location X. If the contents are zero, they are set to 1 in a sin- gle, indivisible memory cycle, and the next instruction is skipped. If it is nonzero, the TSL acts like a no-op. Using TSL it is possible to write procedures lock and unlock with the following properties. lock(x) checks to see if x is locked. If not, it locks x and re- turns control. If x is already locked, it just waits until it becomes unlocked, then it locks x and returns control. unlock releases an existing lock. If all processes lock the semaphore table before using it, only one process at a time can fiddle with the variables and pointers, thus preventing races. Write lock and unlock in assembly language. (Make any reasonable assumptions you need.)

Reference no: EM13869487

Questions Cloud

Gunpowder corp.''s board of directors approved a : On November 6, 2009, Gunpowder Corp.'s board of directors approved a share option plan for key executives. On January 2, 2010, a specific number of share options were granted.
Will the idea work if three or more processes use semaphore : In this way, programs that feel it is immoral to block can first inspect the semaphore to see if it is safe to do a down. Will this idea work if three or more processes use the semaphore? If two processes use the semaphore?
Identify which boundary is best described by each family : Identify which boundary is best described by each family in the scenario above. Identify which boundary inadequacies are present in each family, if applicable. Explain how each boundary and boundary inadequacy manifests itself
How is a substance use disorder diagnosed : What category of substances do cocaine and amphetamine fall under, and what are the implications of this category on the body? Be sure to give the classification, DEA schedule, and physical effects. How is a substance use disorder diagnosed
Write lock and unlock in assembly language : If all processes lock the semaphore table before using it, only one process at a time can fiddle with the variables and pointers, thus preventing races. Write lock and unlock in assembly language.
What management organization and technology issues : What management, organization, and technology issues were addressed in building Wine.com's Web site?
Which are the two biggest factors in marketing : Which are the two biggest factors in marketing? When an organization competes by providing unique products with features that customers value, perceive as different, and are willing to pay a premium price for, it is using a strategy of
Describe carefully what changes are made in directory system : Suppose that the UNIX system call unlink(¢¢/usr/ast/bin/game3¢¢) were executed in the context. Describe carefully what changes are made in the directory system.
Assignment on brookdale senior living solutions : Brookdale Senior Living Solutions

Reviews

Write a Review

Assembly Language Questions & Answers

  Write an assembly language program

Write an assembly language program for encrypting alphabates of a string

  Prompts for an int8 value to inspect and then prints

Write an HLA Assembly program that prompts for an int8 value to inspect and then prints it in binary format.

  Implement a simple login and password system

You are to implement a simple login and password system. Your system should allow for TEN usernames and their associated passwords to be stored.

  Write a mips assembly language program

Write a MIPS assembly language program that prompts for a user to enter a series of floating point numbers and calls read_float to read in numbers and store them in an array. Then the program should display the array content on the console window. Th..

  How many instructions are executed

describe in one sentence what it computes. Suppose that $a0 and $a1 are used for the input and both initially contain the integers a and b, respectively. Suppose that $v0 is used for the output.

  Create a assembly language subroutine mulsum that takes an

create a assembly language subroutine mulsum that takes an array named a containing n bytes of positive numbers and

  Write a program in assembly language which uses bios

write a program in assembly language which uses bios interrupt int 21 to read current system time and displays it on

  Provide the rtl instructions

Provide the RTL instructions and the time steps that will facilitate the execution of the following assembly language instructions  LDA addr,x  STX addr,x

  Program the control unit for an electronic safe

Program the control unit for an electronic safe. The 8-Segment display and LEDs will show status of the safe.

  Problem 1 square root for this problem you will write a

problem 1 square root for this problem you will write a short assembly program that computes the integral square root

  Write two (2) arm assembly language subroutines

Write two (2) ARM assembly language subroutines, called output_char and read_char

  Draw a flow chart for this

Draw a Flow Chart for this 8051 assembly language program below. This program calculate y=x^2+ 2x+9. Register R0 has the x, and at the end of the program R2 should have y. (Test program for x=9).

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd