source: doc/theses/andrew_beach_MMath/code/fixup-empty-r.cfa @ 790d835

Last change on this file since 790d835 was 812ba3d, checked in by Andrew Beach <ajbeach@…>, 3 years ago

Some clean-up to make Peter's changes to the exception benchmarks fit in better. And make test.sh a bit more robust.

  • Property mode set to 100644
File size: 1002 bytes
Line 
1// Resume Across Empty Function
2#include <clock.hfa>
3#include <exception.hfa>
4#include <fstream.hfa>
5#include <stdlib.hfa>
6
7exception fixup_exception {
8        int & fixup;
9};
10vtable(fixup_exception) fixup_vt;
11
12void nounwind_empty(unsigned int frames) {
13        if (frames) {
14                nounwind_empty(frames - 1);
15                // "Always" false, but prevents recursion elimination.
16                if (-1 == frames) printf("~");
17        } else {
18                int fixup = 17;
19                throwResume (fixup_exception){&fixup_vt, fixup};
20        }
21}
22
23int main(int argc, char * argv[]) {
24        unsigned int times = 1;
25        unsigned int total_frames = 1;
26        if (1 < argc) {
27                times = strto(argv[1], 0p, 10);
28        }
29        if (2 < argc) {
30                total_frames = strto(argv[2], 0p, 10);
31        }
32
33        Time start_time = timeHiRes();
34        for (unsigned int count = 0 ; count < times ; ++count) {
35                try {
36                        nounwind_empty(total_frames);
37                } catchResume (fixup_exception * ex) {
38                        ex->fixup = total_frames + 42;
39                }
40        }
41        Time end_time = timeHiRes();
42        sout | "Run-Time (s): " | wd(0,1, (end_time - start_time)`ns / 1_000_000_000.);
43}
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