Critical Section In Operating System
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This protected section is the critical section or critical region.
Critical section in operating system. Computer engineering mca operating system the critical section is a code segment where the shared variables can be accessed. An atomic action is required in a critical section i e. Simply we can say that the critical section is a part of the program where shared resources are accessed are protected.
Every process can have its own critical section. The critical region or critical section in an operating system os is a piece of code which only one process executes at a time. It cannot be executed by more than one processes at the same time.
The portion of the program where the shared data variables or shared resources or shared data will be placed is called a critical section. The part of the process where the code for accessing the shared resources is written that part or section is the critical section cs of that process. Four elements of critical section are 1 entry section 2 critical section 3 exit section 4 reminder section a critical section is a segment of code which can be.
Now the critical section problem is to implement such a solution which can be used by the processes to cooperate when they share common resources. A critical sectionis a piece of code that accesses a shared resource either in the form of data structure or a device that must not be concurrently accessed by more than one thread of execution. It cannot be executed by more than one process at a time.
The critical section cannot be executed by more than one process at the same time. The critical sectioncan be accessed by only one process at a time. Operating system faces the difficulties in allowing and disallowing the processes from entering the critical section.
Each process has a critical section where it changes common variables update tables write a table and so on. All the other processes have to wait to execute in their critical sections. Only one process can execute in its critical section at a time.
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