Synchronization Semaphores
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The semaphores used for mutual exclusion which are binary semaphore contain 1 as an initial value. When a process attempts to enter into critical region, that process causes the operating system to call wait() function. This function checks the semaphore value. If the value is equal to 1, that semaphore is allowed to enter into the critical region, and the value is decremented by one. If the value is equal to 0, that semaphore is added to waiting queue.
This is actually what the wait() method does on a binary semaphore. On the other hand, when I search for why the value of synchronization semaphores is equal to 0, or what happens if wait() and signal() methods are called on the synchronization semaphores, I cannot find any valid knowledge.
Is there anyone who know the reason why value of synchronization semaphores is equal to 0, and what wait() and signal() methods do on synchronization semaphores ?
synchronization semaphore
asked Apr 11 at 17:48
Goktug
1467
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up vote
0
down vote
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The semaphores used for mutual exclusion which are binary semaphore contain 1 as an initial value. When a process attempts to enter into critical region, that process causes the operating system to call wait() function. This function checks the semaphore value. If the value is equal to 1, that semaphore is allowed to enter into the critical region, and the value is decremented by one. If the value is equal to 0, that semaphore is added to waiting queue.
This is actually what the wait() method does on a binary semaphore. On the other hand, when I search for why the value of synchronization semaphores is equal to 0, or what happens if wait() and signal() methods are called on the synchronization semaphores, I cannot find any valid knowledge.
Is there anyone who know the reason why value of synchronization semaphores is equal to 0, and what wait() and signal() methods do on synchronization semaphores ?
synchronization semaphore
asked Apr 11 at 17:48
Goktug
1467
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
The semaphores used for mutual exclusion which are binary semaphore contain 1 as an initial value. When a process attempts to enter into critical region, that process causes the operating system to call wait() function. This function checks the semaphore value. If the value is equal to 1, that semaphore is allowed to enter into the critical region, and the value is decremented by one. If the value is equal to 0, that semaphore is added to waiting queue.
This is actually what the wait() method does on a binary semaphore. On the other hand, when I search for why the value of synchronization semaphores is equal to 0, or what happens if wait() and signal() methods are called on the synchronization semaphores, I cannot find any valid knowledge.
Is there anyone who know the reason why value of synchronization semaphores is equal to 0, and what wait() and signal() methods do on synchronization semaphores ?
synchronization semaphore
asked Apr 11 at 17:48
Goktug
1467
The semaphores used for mutual exclusion which are binary semaphore contain 1 as an initial value. When a process attempts to enter into critical region, that process causes the operating system to call wait() function. This function checks the semaphore value. If the value is equal to 1, that semaphore is allowed to enter into the critical region, and the value is decremented by one. If the value is equal to 0, that semaphore is added to waiting queue.
This is actually what the wait() method does on a binary semaphore. On the other hand, when I search for why the value of synchronization semaphores is equal to 0, or what happens if wait() and signal() methods are called on the synchronization semaphores, I cannot find any valid knowledge.
Is there anyone who know the reason why value of synchronization semaphores is equal to 0, and what wait() and signal() methods do on synchronization semaphores ?
synchronization semaphore
asked Apr 11 at 17:48
Goktug
1467
asked Apr 11 at 17:48
Goktug
1467
asked Apr 11 at 17:48
Goktug
1467
asked Apr 11 at 17:48
Goktug
1467
1467
add a comment |Â
add a comment |Â
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