} } #define MAX_PROCESSES 255 int number_of_processes = 0; /* the implementation of fork() calls this function */ int allocate_process() { int new_pid; if (number_of_processes == MAX_PROCESSES) return -1; ple for allocating and releasing processes shown in Figure E6.21. else { /* allocate necessary process resources */ ++number_of_processes; return new_pid; } /* the implementation of exit() calls this function */ void release_process() { /* release process resources */ --number_of_processes; Figure E6.21 Allocating and releasing processes for Exercise 6.27. a. Identify the race condition(s). 4 b. Assume you have a mutex lock named mutex with the operations acquire() and release (). Indicate where the loc needs to be placed to prevent the race condition(s). c. Could we replace the integer variable int number_of_processes = 0 with the atomic integer atomic_t number_of_processes = 0} to prevent the race condition(s)?

} } #define MAX_PROCESSES 255 int number_of_processes = 0; /* the implementation of fork() calls this function / int allocate_process() { int new_pid; if (number_of_processes == MAX_PROCESSES) return -1; ple for allocating and releasing processes shown in Figure E6.21. else { / allocate necessary process resources / ++number_of_processes; return new_pid; } / the implementation of exit() calls this function / void release_process() { / release process resources */ --number_of_processes; Figure E6.21 Allocating and releasing processes for Exercise 6.27. a. Identify the race condition(s). 4 b. Assume you have a mutex lock named mutex with the operations acquire() and release (). Indicate where the loc needs to be placed to prevent the race condition(s). c. Could we replace the integer variable int number_of_processes = 0 with the atomic integer atomic_t number_of_processes = 0} to prevent the race condition(s)?

Name: }6.22 Consider the code example for allocating and releasing processe
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Description: }6.22 Consider the code example for allocating and releasing processes shown in Figure E6.21.#define MAX_PROCESSES 255int number_of_processes = 0;}/* the implementation of fork() calls this function */int allocate_process() {int new_pid;if (number_o

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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please write with proper explanation. Question half solution is here please write what is main disadvantages of this approach? Half solve questions: Mutual Exclusion: Mutex is an abbreviation for Mutual Exclusion. It is a programme object that prevents multiple users from accessing a shared resource at the same time. When a process accesses a shared variable, it is said to be in the critical section. When no two processes are present in the critical section at the same time, this is referred to as Mutual Exclusion or Mutex. while (true) { semaphore sem = S; while (S <= 0) do no operation { S = S-1; wait (S); } /*critical section*/ while (S > 0) { S = S+1; signal (S); } /*remainder section*/ }
2.2.14 Sorted queues being combined. Create a static function that receives two queues of sorted items as inputs and returns a queue formed by combining the two queues into a single sorted order queue. 2.2.15 Bottom-up mergesort of a queue. Create an implementation of the bottom-up mergesort using the following strategy: Make N queues, each holding one of the N things, given N items. assemble the N queues into a queue. Apply Exercise 2.2.14's merging process to the first two queues several times, and at the conclusion, reinsert the combined queue.Continue until there is just one queue left in the queue of queues.
****PROGRAM IN LANGUAGE C *** Write a default verslon of program to report the behavlor of the LInux kernel by Inspecting kernel state. The program should print the following values to the user screen or console: • CPU model name • Llnux kernel verslon • Amount of time slnce the system was last booted, In the form dd:hh:mm:ss (for example, 3 days 13 hours 46 mlnutes 32 seconds would be formatted as 03:13:46:32) • report date (gettimeofday) and machine hostname.
d(i) State the main reason of using static access modifier.
C++ Can someone answer the following code below in C++: Please add to the project a print statement that says how long each version ran in milliseconds please! Version 1 of the process creation hierarchy uses linked lists to keep track of child processes as described in section "The process control block", subsection "The PCB data structure". For the purposes of performance evaluation, the PCBs are simplified as follows: All PCBs are implemented as an array of size n. Each process is referred to by the PCB index, 0 through n-1. Each PCB is a structure consisting of only the two fields: parent: a PCB index corresponding to the process's creator children: a pointer to a linked list, where each list element contains the PCB index of one child process The necessary functions are simplified as follows: create(p) represents the create function executed by process PCB[p]. The function creates a new child process PCB[q] of process PCB[p] by performing the following tasks: allocate a…
Python only** define the following function: 1. This function must add a task to a checklist, setting its initial value to False. It will accept two parameters: the checklist object to add to, and the task name to add. In addition to adding the task, it must return the (now modified) checklist object that it was given. There is one issue, however: a task cannot be added to a checklist if the name requested is already being used by another task in that checklist. In that case, this function must print a specific message and must return None Define addTask with 2 parameters Use def to define addTask with 2 parameters Use a return statement Within the definition of addTask with 2 parameters, use return _ in at least one place. Do not use any kind of loop Within the definition of addTask with 2 parameters, do not use any kind of loop.
PROGRAM 15: Swapper Write an HLA Assembly language program that implements a function which correctly sorts three parameters and returns a boolean value in AL which should be set to true if any swaps were performed to sort the sequence in decreasing order. This function should have the following signature: procedure swapper (var x : int16; var y: int16; var z : int16); @nodisplay; @noframe; After invoking the function, the value of x >= the value of y >= the value of z. Your function must use reference parameters, changing the callers version of the variables passed to the function. Here is a sample program dialogue: Gimme X: 12 Gimme Y: 1 Gimme Z: 50 After sorting, X= 50, Y = 12, Z = 1 Gimme X: 100 Gimme Y: 10 Gimme Z: 2 After sorting, X = 100, Y = 10, z = 2
1. Please explain in detail Scott Meyers’s point: Use weak_ptr for shared_ptr like pointers that can dangle. 2. How are Smart Pointer functions move(), reset(), and release() different from each other? Please also explain in detail which function is most dangerous and why? 3. Please explain in detail how to manually destroy an existing Smart Pointer control block.
Homework -4 1- Implement the following function by : Type 1 MUX ( D partitioned variable) Type 2 MUX (C,D) are partitioned variables • Type 3 MUX (B,C,D) are partitioned variables F(A,B,C,D)={m(4,5,6,7,10,14) 2- Implement the following function by: Type 1 MUX (D) partitioned variable • Type 1 MUX (C) partitioned variable (8X1) MUX's • (4X1) MUX's F(A,B,C,D)=_m(0,1,5,6,8,9,12,13)+d(3,11)
Course: Reconfigurable Computing (Using Vivado ML Edition or Previous Version) Lab requirements: 1) Implement a 2-D convolution using HLS C. 2) Optimize the HLS with directives. Kindly provode the Source code + Experimental report.
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PLEASE TYPE IF NOT TYPE THAN DO NOT DO IT*** DO ALL 3 (B VIA D)**** Exercise 8.4.1: Composition of relations expressed as a set of pairs. Here are two relations defined on the set {a, b, c, d}: S = { (a, b), (a, c), (c, d), (c, a) } R = { (b, c), (c, b), (a, d), (d, b) } Write each relation as a set of ordered pairs. (b) R ο S (c) S ο S (d) R ο R