Code for reference: void thr_exit() { Pthread_mutex_lock(&m); Pthread_cond_signal(&c); Pthread_mutex_unlock(&m); }...
Code for reference:
void thr_exit() {
Pthread_mutex_lock(&m);
Pthread_cond_signal(&c);
Pthread_mutex_unlock(&m);
}
void thr_join() {
Pthread_mutex_lock(&m);
Pthread_cond_wait(&c, &m);
Pthread_mutex_unlock(&m);
}
(a) Does the code above guarantee mutex? yes/no and why (brief explanation)?
(b) Does the code above guarantee no unnecessary delay? yes/no and why (brief explanation)?
(c) Does the code above guarantee fairness? yes/no and why (brief explanation)?
Homework Answers
Add Answer to:
Code for reference:
void thr_exit() {
Pthread_mutex_lock(&m);
Pthread_cond_signal(&c);
Pthread_mutex_unlock(&m);
}...
Read given code RaceOrNot1.c and write all possible outputs of the program. Assume there will be...
Read given code RaceOrNot1.c and write all possible outputs of the program. Assume there will be no thread creation or joining failures or mutex failures. If you believe there is only one possible output, you just need to write that output. #include <stdio.h> #include <stdlib.h> #include <pthread.h> pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t count_mutex3 = PTHREAD_MUTEX_INITIALIZER; int c[2] = {1,0}; void *UpdateC1(void *arg) { int i; for(i=0;i<1000000;i++) { pthread_mutex_lock(&count_mutex); c[0]=(c[0]+1)%2; c[1]=(c[1]+1)%2; pthread_mutex_unlock(&count_mutex); } return NULL; } void *UpdateC2(void *arg) { int...
Read given code RaceOrNot1.c and write all possible outputs of the program. Assume there will be...
Read given code RaceOrNot1.c and write all possible outputs of the program. Assume there will be no thread creation or joining failures or mutex failures. If you believe there is only one possible output, you just need to write that output. #include <stdio.h> #include <stdlib.h> #include <pthread.h> pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t count_mutex3 = PTHREAD_MUTEX_INITIALIZER; int c[2] = {1,0}; void *UpdateC1(void *arg) { int i; for(i=0;i<1000000;i++) { pthread_mutex_lock(&count_mutex); c[0]=(c[0]+1)%2; c[1]=(c[1]+1)%2; ...
In c programming The Consumer Submits processing requests to the producer by supplying a file name, its location and a character. It also outputs the contents of the file provided by the producer...
In c programming The Consumer Submits processing requests to the producer by supplying a file name, its location and a character. It also outputs the contents of the file provided by the producer to the standard output. The Producer Accepts multiple consumer requests and processes each request by creating the following four threads. The reader thread will read an input file, one line at a time. It will pass each line of input to the character thread through a queue...
What is the worst case running time of the following pseudo-code. void doSomething(int n, int m)...
What is the worst case running time of the following pseudo-code. void doSomething(int n, int m) { if(m> n) return; System.out.println("m=" + m); doSomething(n, m+2); } A o(n) B O(nlogn) C O(n2) D O(n+m) E None of the above
What is output of the code? static void Main(string[] args) { Mul(); m(); Console.ReadLine(); } static...
What is output of the code? static void Main(string[] args) { Mul(); m(); Console.ReadLine(); } static void Mul() { Console.WriteLine("4"); } static void m() { Console.WriteLine("3"); Mul(); } Select one: a. 4 3 3 b. 4 4 3 c. 4 3 4 d. 3 4 4
6. (Short answer) The C++ code below is very close to working, but, as written, won't...
6. (Short answer) The C++ code below is very close to working, but, as written, won't compile. When trying to compile, the compiler generates a number of errors similar to "cout' was not declared in this scope." Respond to the prompts below about the code.(20 points, 5 points each) #include <iostream> void FindMax(int a, int b, int& max) { if (a > b) max = a; else { max = b; } int main() { int num1 = 0; int...
Convert the below C code to basic MIPS. Leave comments for explanation please #include <stdio.h> int main(void) {...
Convert the below C code to basic MIPS. Leave comments for explanation please #include <stdio.h> int main(void) { printf("Insert two numbers\n"); int a,b,c; scanf("%d",&a); scanf("%d",&b); c=a|b; printf("%d|%d=%d\n",a,b,c); return 0; }
How do I do this C++ in a Unix Environment assignment Given dot1m.c 1. The program (dot1m.c) uses...
How do I do this C++ in a Unix Environment assignment Given dot1m.c 1. The program (dot1m.c) uses mutex to lock and unlock the shared resource (dotstr.sum) for access control as shown below. pthread_mutex_lock (&mutexsum); dotstr.sum += mysum; printf("Thread %ld did %d to %d: mysum=%f global sum=%f\n", offset,start,end,mysum,dotstr.sum); pthread_mutex_unlock (&mutexsum); 2. Modify dot1m.c program to use reader-writer lock (instead of mutex). Replace the codes (for mutex) by the codes (for reader-writer lock). To initialize reader-writer lock, pthread_rwlock_initializer. At the end,...
Convert the below C code to basic MIPS. Please leave comments for explanation #include <stdio.h> int main(void) {...
Convert the below C code to basic MIPS. Please leave comments for explanation #include <stdio.h> int main(void) { printf("Insert two numbers\n"); int a,b; scanf("%d",&a); scanf("%d",&b); a=a<<2; b=b<<2; printf("%d&%d\n",a,b); return 0; }
[C++] Please help to understand why this code need to have "void calcSales(CorpData &);" and "void...
[C++] Please help to understand why this code need to have "void calcSales(CorpData &);" and "void displayDivInfo(CorpData);". Thanks! ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ #include <iostream> #include <string> using namespace std; struct CorpData { string diviName; double firstQua, secondQua, thirdQua, fourthQua, annualSales, quaAvg; CorpData(string d, double fq, double sq, double tq, double frq) { diviName = d; firstQua = fq; secondQua = sq; thirdQua = tq; fourthQua = frq; } }; void calcSales(CorpData &); void displayDivInfo(CorpData); int main() { CorpData West("West", 10000, 20000,...
6. (Short answer) The C++ code below is very close to working, but, as written, won't compile. When trying to compile, the compiler generates a number of errors similar to "cout' was not declared in this scope." Respond to the prompts below about the code.(20 points, 5 points each) #include <iostream> void FindMax(int a, int b, int& max) { if (a > b) max = a; else { max = b; } int main() { int num1 = 0; int...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago