18.setjmp.cpp

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#include <setjmp.h>
 
#include <rw_driver.h>
 
 
jmp_buf env;
 
void test_longjmp (int arg)
{
    longjmp (env, arg);
 
    rw_assert (0, 0, __LINE__,
               "call to longjmp(..., %d) returned", arg);
}
 
 
static int
run_test (int, char**)
{
#ifdef longjmp
 
    // longjmp must not be #defined as a macro
    rw_assert (0, 0, __LINE__, "longjmp #defined as a macro");
 
#endif   // longjmp
 
#ifdef jmp_buf
 
    //jmp_buf must not be #defined as a macro
    rw_assert (0, 0, __LINE__, "jmp_buf #defined as a macro");
 
#endif   // jmp_buf
 
#ifndef setjmp
 
    //setjmp must be #defined as a macro
    rw_assert (0, 0, __LINE__, "macro setjmp not #defined");
 
#endif   // setjmp
 
    // verify that setjmp works
 
    // using volatile to work around a gcc optimizer bug:
    //   http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34024
    volatile int arg = 1;
 
    int result;
 
    result = setjmp (env);
 
    if (0 == result) {
 
        test_longjmp (arg);
 
        rw_assert (0, 0, __LINE__,
                   "call to longjmp(..., %d) returned", arg);
    }
    else {
        rw_assert (arg == result, 0, __LINE__,
                   "longjmp(..., %d) returned %d from setjmp()",
                   arg, result);
 
        // repeat a couple more times
        if (arg < 3)
            test_longjmp (++arg);
    }
 
    return 0;
}
 
 
int main (int argc, char *argv[])
{
    return rw_test (argc, argv, __FILE__,
                    "support.runtime",
                    "header <setjmp.h>",
                    run_test,
                    "",
                    (void*)0);
}