source:
doc/theses/andrew_beach_MMath/code/throw-empty.cpp
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69ab896
Last change on this file since 69ab896 was 49b3389, checked in by , 3 years ago | |
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[ea593a3] | 1 | // Throw Across Empty Function |
[ee23a8d] | 2 | #include <chrono> |
[49b3389] | 3 | #include <cstdio> |
[ea593a3] | 4 | #include <cstdlib> |
[ee23a8d] | 5 | #include <exception> |
6 | #include <iostream> | |
[f79ee0d] | 7 | #include <iomanip> |
[ee23a8d] | 8 | |
[f79ee0d] | 9 | using namespace std; |
[ee23a8d] | 10 | using namespace std::chrono; |
[ea593a3] | 11 | |
12 | struct EmptyException : public std::exception {}; | |
13 | ||
14 | void unwind_empty(unsigned int frames) { | |
15 | if (frames) { | |
16 | unwind_empty(frames - 1); | |
[49b3389] | 17 | if (-1 == frames) printf("~"); |
[ea593a3] | 18 | } else { |
19 | throw (EmptyException){}; | |
20 | } | |
21 | } | |
22 | ||
23 | int main(int argc, char * argv[]) { | |
24 | unsigned int times = 1; | |
25 | unsigned int total_frames = 1; | |
[ee23a8d] | 26 | if (1 < argc) { |
[ea593a3] | 27 | times = strtol(argv[1], nullptr, 10); |
28 | } | |
[ee23a8d] | 29 | if (2 < argc) { |
[ea593a3] | 30 | total_frames = strtol(argv[2], nullptr, 10); |
31 | } | |
32 | ||
[ee23a8d] | 33 | time_point<steady_clock> start_time = steady_clock::now(); |
[ea593a3] | 34 | for (unsigned int count = 0 ; count < times ; ++count) { |
35 | try { | |
36 | unwind_empty(total_frames); | |
37 | } catch (EmptyException &) { | |
[54651005] | 38 | asm volatile ("# catch block"); |
[ea593a3] | 39 | } |
40 | } | |
[ee23a8d] | 41 | time_point<steady_clock> end_time = steady_clock::now(); |
42 | nanoseconds duration = duration_cast<nanoseconds>(end_time - start_time); | |
[f79ee0d] | 43 | cout << "Run-Time (s): " << fixed << setprecision(1) << duration.count() / 1'000'000'000. << endl; |
[ea593a3] | 44 | } |
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