C - what do you mean by critical section in c?

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what do you mean by critical section in c?

Total Answers and Comments: 3

Last Update: September 09, 2008 Asked by: vmannur

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Submitted by: preetin

Critical section is the part of the code that can be assessed by multiple threads or processes at the same time.

In order to protect the overwriting of the same memory space, this part of the code is protected by use of semaphores. One process takes the semaphore and during this period, it cannot be executd by any other thread. When the work is finished, the semaphore is released so that other processes can use it to update the memory space or read from it.

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sourabh_t, rajani_vaddepalli15

July 16, 2008 08:58:26

preetin

Member Since: July 2008 Contribution: 1

RE: what do you mean by critical section in c?

Critical section is the part of the code that can be assessed by multiple threads or processes at the same time.

In order to protect the overwriting of the same memory space this part of the code is protected by use of semaphores. One process takes the semaphore and during this period it cannot be executd by any other thread. When the work is finished the semaphore is released so that other processes can use it to update the memory space or read from it.

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Overall Rating: +2

July 17, 2008 00:05:07

deshdeepak53

Member Since: July 2008 Contribution: 1

RE: what do you mean by critical section in c?

Critical section is the part of the code that can be assessed by multiple threads or processes at the same time.

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September 09, 2008 16:03:44

rashmi.mohanty

Member Since: September 2008 Contribution: 8

RE: what do you mean by critical section in c?

critical section in c is a piece of code that accesses a shared resource (data structure or device) that must not be concurrently accessed by more than one thread/process of execution.
eg :-
while(1st thread is active)
{
Initialize CriticalSection
Enter Into CriticalSection
perform operation
Leave/release CriticalSection
Delete CriticalSection(1st thread)
}

while (2nd thread is active)
{
Initialize CriticalSection
Enter Into CriticalSection
perform 2nd thread operation
Leave/release CriticalSection
Delete CriticalSection(2nd thread)

}

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