source:
doc/theses/andrew_beach_MMath/code/throw-finally.cfa
Last change on this file was f79ee0d, checked in by , 3 years ago | |
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File size: 1.0 KB |
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[ea593a3] | 1 | // Throw Across Finally |
[ee23a8d] | 2 | #include <clock.hfa> |
[ea593a3] | 3 | #include <exception.hfa> |
[ee23a8d] | 4 | #include <fstream.hfa> |
[f79ee0d] | 5 | #include <stdlib.hfa> // strto |
[ea593a3] | 6 | |
[f79ee0d] | 7 | exception empty_exception; |
8 | vtable(empty_exception) empty_vt; | |
[ea593a3] | 9 | |
[f79ee0d] | 10 | unsigned int frames; // use global because of gcc thunk problem |
[ea593a3] | 11 | |
[f79ee0d] | 12 | void unwind_finally(unsigned int dummy) { |
[ea593a3] | 13 | if (frames) { |
[f79ee0d] | 14 | frames -= 1; |
[ea593a3] | 15 | try { |
[f79ee0d] | 16 | unwind_finally(42); |
[ea593a3] | 17 | } finally { |
[54651005] | 18 | asm volatile ("# finally block"); |
[ea593a3] | 19 | } |
20 | } else { | |
[f79ee0d] | 21 | dummy = 42; |
[ea593a3] | 22 | throw (empty_exception){&empty_vt}; |
23 | } | |
24 | } | |
25 | ||
26 | int main(int argc, char * argv[]) { | |
27 | unsigned int times = 1; | |
28 | unsigned int total_frames = 1; | |
[ee23a8d] | 29 | if (1 < argc) { |
[f79ee0d] | 30 | times = strto(argv[1], 0p, 10); |
[ea593a3] | 31 | } |
[ee23a8d] | 32 | if (2 < argc) { |
[f79ee0d] | 33 | total_frames = strto(argv[2], 0p, 10); |
[ea593a3] | 34 | } |
[f79ee0d] | 35 | frames = total_frames; |
[ea593a3] | 36 | |
[ee23a8d] | 37 | Time start_time = timeHiRes(); |
[ea593a3] | 38 | for (int count = 0 ; count < times ; ++count) { |
39 | try { | |
[f79ee0d] | 40 | unwind_finally(42); |
[ea593a3] | 41 | } catch (empty_exception *) { |
[54651005] | 42 | asm volatile ("# catch block"); |
[ea593a3] | 43 | } |
44 | } | |
[ee23a8d] | 45 | Time end_time = timeHiRes(); |
[f79ee0d] | 46 | sout | "Run-Time (s): " | wd(0,1, (end_time - start_time)`ns / 1_000_000_000.); |
[ea593a3] | 47 | } |
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