Question

How to use getcontext and getcontext in C

Answer 1

#include <stdio.h>
#include <ucontext.h>

int g_val = 0;
ucontext_t context, *cp = &context;
    
void func(void) {
    g_val = 1;
    setcontext(cp);
}    

int main(void) {
    getcontext(cp);
    
    if (!g_val) {
        puts("getcontext() has been called");
        func();
    }
    else {
        puts("setcontext() has been called");
    }
}




/*
run:

getcontext() has been called
setcontext() has been called  

*/

  

 

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