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How does the signal operation associated with monitors differ from the corresponding operation defined for semaphores?
The signal() operations associated with monitors is not persistent in the following sense: if a signal is performed and if there are no waiting threads, then the signal is simply ignored and the system does not remember the fact that the signal took place. If a subsequent wait operation is performed, then the corresponding thread simply blocks. In semaphores, on the other hand, every signal results in a corresponding increment of the semaphore value even if there are no waiting threads. A future wait operation would immediately succeed because of the earlier increment.
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What is Monitors and Semaphores?
a semaphore is a stoplight and or traffic signal.
What are the differences between semaphores and monitors in concurrent programming?
Semaphores and monitors are both synchronization mechanisms used in concurrent programming, but they have some key differences. Semaphores are simple integer variables that are used to control access to shared resources by multiple threads. They can be used to signal when a resource is available or to block threads until a resource becomes available. Semaphores are low-level and require explicit management by the programmer. Monitors, on the other hand, are higher-level constructs that encapsulate both data and synchronization operations within a single object. Monitors provide a more structured way to manage shared resources by allowing only one thread to access the resource at a time. Monitors also provide mechanisms for condition variables, which allow threads to wait for specific conditions to be met before proceeding. In summary, semaphores are lower-level synchronization primitives that require explicit management, while monitors are higher-level constructs that provide a more structured and convenient way to manage shared resources in concurrent programming.
What is weak semaphore and strong semaphore?
strong semaphores specify the order in which processes are removed from the queue, which guarantees avoiding starvation. Weak semaphores do not specify the order in which processes are removed from the queue.
What is the similarity between semaphore and monitor?
The wait and signal operations on condition variables in a monitor are similar to P and Voperations on counting semaphores. A wait statement can block a process's execution, while a signal statement can cause another process to be unblocked. However, there are some differences between them. When a process executes a Poperation, it does not necessarily block that process because the counting semaphore may be greater than zero. In contrast, when a wait statement is executed, it always blocks the process. When a task executes a V operation on a semaphore, it either unblocks a task waiting on that semaphore or increments the semaphore counter if there is no task to unlock. On the other hand, if a process executes a signal statement when there is no other process to unblock, there is no effect on the condition variable. Another difference between semaphores and monitors is that users awaken by a V operation can resume execution without delay. Contrarily, users awaken by a signaloperation are restarted only when the monitor is unlocked. In addition, a monitor solution is more structured than the one with semaphores because the data and procedures are encapsulated in a single module and that the mutual exclusion is provided automatically by the implementation.(excerpted from http://ei.cs.vt.edu/~cs5204/sp99/monitor.html) The wait and signal operations on condition variables in a monitor are similar to P and V operations on counting semaphores. A wait statement can block a process's execution, while a signal statement can cause another process to be unblocked. However, there are some differences between them. When a process executes a P operation, it does not necessarily block that process because the counting semaphore may be greater than zero. In contrast, when a wait statement is executed, it always blocks the process. When a task executes a V operation on a semaphore, it either unblocks a task waiting on that semaphore or increments the semaphore counter if there is no task to unlock. On the other hand, if a process executes a signal statement when there is no other process to unblock, there is no effect on the condition variable. Another difference between semaphores and monitors is that users awaken by a V operation can resume execution without delay. Contrarily, users awaken by a signal operation are restarted only when the monitor is unlocked. In addition, a monitor solution is more structured than the one with semaphores because the data and procedures are encapsulated in a single module and that the mutual exclusion is provided automatically by the implementation.(excerpted from http://ei.cs.vt.edu/~cs5204/sp99/monitor.html)
Can computers monitors be thrown in the trash?
NO! You will get fined for it if you get caught. Monitors need to be taken to the recycling yard, and usually require a small recycling fee. Google your local "recycling center" and ask them about the cost associated with the monitor.
Type of monitors?
There are: CRT monitors (those fat monitors) and LCD monitors (flat screens)
Is there gold in crt monitors?
No but there is in LCD monitors.
How does a computer monitors performance?
computer monitors
What is the function of the control box?
The control box is a device that manages and regulates the operation of a system or equipment. It controls inputs and outputs, monitors parameters, and ensures that the system functions effectively and safely.
How many monitors does vista support?
16 monitors !!
The mandatory labels used at convey the contents of the container associated hazards the Hazardous Waste monitors name and contact information and?
Accumulation start date or the word "Satellite"
What is the function of an HVAC limit switch and how does it contribute to the overall operation of the system?
An HVAC limit switch is a safety device that monitors the temperature in the system. It helps prevent overheating by shutting off the system if the temperature exceeds a safe level. This protects the system from damage and ensures safe operation.
