Answer:
Explanation:
Following are the Semaphores:
Customers: Counts waiting customers;
Barbers: Number of idle barbers (0 or 1)
mutex: Used for mutual exclusion.
Cutting: Ensures that the barber won’t cut another customer’s hair before the previous customer leaves
Shared data variable:
count_cust: Counts waiting customers. ------------copy of customers. As value of semaphores can’t access directly.
// shared data
semaphore customers = 0; semaphore barbers = 0; semaphore cutting = 0; semaphore mutex = 1;
int count_cust= 0;
void barber() {
while(true) { //shop is always open
wait(customers); //sleep when there are no waiting customers
wait(mutex); //mutex for accessing customers1
count_cust= count_cust-1; //customer left
signal(barbers);
signal(mutex);
cut_hair();
}
}
void customer() {
wait(mutex); //mutex for accessing count_cust
if (count_cust< n) {
count_cust= count_cust+1; //new customer
signal(customers); signal(mutex);
wait(barbers); //wait for available barbers get_haircut();
}
else { //do nothing (leave) when all chairs are used. signal(mutex);
}
}
cut_hair(){ waiting(cutting);
}
get_haircut(){
get hair cut for some time; signal(cutting);
}
OSHA standards appear in the <span>Code of Federal Regulations (CFR) and are then broken down into Parts</span>
Yes, this statement is true.
Actually this statement is about using Microsoft PowerPoint, shapes in the shape gallery can be combined to show relationships among the elements.
In the shape gallery of Microsoft PowerPoint, there are many shapes such as oval, square, rectangle, star, line and many more. One can use any shape to illustrate the concept or to show relationship between something.
Explanation:
Click the Home tab.
In the Fonts group, click the dialog box launcher button.
The button is found in the lower-right corner of the Font group.
The Font dialog box contains all the commands for formatting text, including quite a few that didn’t find their way into the Font group on the Ribbon. As with all text formatting, the commands you choose in the Font dialog box affect any new text you type or any selected text in your document.
When you’ve finished setting up your font stuff, click the OK button. Or click Cancel if you’re just visiting.
Use the Ctrl+D keyboard shortcut to quickly summon the Font dialog box.
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