The POSIX standard Pthreads provides an API for managing thread cancellation. The pthread_setcancelstate() function is used to set the cancellation state. Its prototype is defined as follows:

pthread_setcancelstate(int state, int *oldstate)

The two possible values for the state are PTHREAD_CANCEL_ENABLE and PTHREAD_CANCEL_DISABLE. Using the code segment shown below, provide three examples of operations that would be suitable to perform between the calls to disable and enable thread cancellation.

int oldstate; pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldstate); /* What operations would be performed here? */ pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate);