"Wait-For" condition occurs in a system when a process is waiting for a resource that is currently being
held by another process, and that second process is also waiting for a resource held by the first process.
This can lead to a situation called a "deadlock," where both processes are stuck and cannot proceed, resulting in a system that is effectively frozen.
To prevent deadlock, it is essential to deny the Wait-For condition. Here are a few ways to achieve this:
• Resource ordering: One way to prevent the Wait-For condition is to impose an ordering on the
resources used by processes. By requiring processes to request and release resources in a
specific order, the Wait-For condition can be avoided.
• Resource preemption: Another approach to prevent deadlock is to preempt a resource from a
process and allocate it to another process. This technique can break the deadlock by allowing
the process that was previously waiting for the resource to proceed.
• Timeouts: Another approach is to set timeouts for processes that are waiting for a resource. If a
process does not obtain the resource within a certain time limit, the resource can be released
and allocated to another process.
• Avoidance: Deadlock avoidance algorithms can predict when a resource request will lead to a
deadlock and avoid granting that request. These algorithms can help prevent deadlock before it
occurs.
• Detection and Recovery: Finally, another option is to detect when a deadlock has occurred and
recover from it by releasing resources or terminating processes to break the deadlock.
It is important to note that each of these techniques has its strengths and weaknesses, and there is no
one-size-fits-all solution to preventing deadlock. The choice of technique will depend on the specific
requirements of the system and the resources being used