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#include <stdio.h>
static int current_exception_id = 0;
typedef struct {
int jmp;
} jmp_state;
void setjmp_func(jmp_state* s, int level) {
int prev_jmp = s->jmp;
int c_jmp;
if (level == 2) {
printf("level is 2, perform longjmp!\n");
throw 1;
}
c_jmp = current_exception_id++;
try {
printf("setjmp normal execution path, level: %d, prev_jmp: %d\n", level,
prev_jmp);
s->jmp = c_jmp;
setjmp_func(s, level + 1);
}
catch (int catched_eid) {
printf("caught %d\n", catched_eid);
if (catched_eid == c_jmp) {
printf("setjmp exception execution path, level: %d, prev_jmp: %d\n",
level, prev_jmp);
if (prev_jmp != -1) {
printf("prev_jmp is not empty, continue with longjmp!\n");
s->jmp = prev_jmp;
throw s->jmp;
}
} else {
throw;
}
}
printf("Exiting setjmp function, level: %d, prev_jmp: %d\n", level, prev_jmp);
}
int main(int argc, char* argv[]) {
jmp_state s;
s.jmp = -1;
setjmp_func(&s, 0);
return 0;
}
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