Consider the simple flowcharts below for pend and post functions for use with a

Question

Consider the simple flowcharts below for pend and post functions for use with a cooperative multitasking programs written with cxlib. The operator “<=” is a less than or equal test. The variable pS is a pointer of type int so that *pS refers to the value referenced by pS. Write functions pend and post, the corresponding prototypes are given below.

Consider the issues that could cause a pend function written according to the given flowchart to not be reentrant. Give your answer in a few sentences

Explanation / Answer

void pend(int *pS)

{

while(!*pS <=0)

{

*pS=*pS-1;

}

}

void post(int *pS)

{

*pS=*pS+1;

}

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