ADTast-experimentalenumforall-pointer-decaypthread-emulationqualifiedEnum
Last change
on this file since 49b3389 was
18783b4,
checked in by Peter A. Buhr <pabuhr@…>, 3 years ago
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attempt to remove tail-recursion optimization
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-
Property mode set to
100644
|
File size:
1.3 KB
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Rev | Line | |
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[f79ee0d] | 1 | // Resume Across Other Handler |
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| 2 | #include <clock.hfa> |
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| 3 | #include <exception.hfa> |
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| 4 | #include <fstream.hfa> |
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| 5 | #include <stdlib.hfa> // strto |
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| 6 | |
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| 7 | exception fixup_exception { |
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| 8 | int & fixup; |
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| 9 | }; |
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| 10 | vtable(fixup_exception) fixup_vt; |
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| 11 | exception not_raised_exception { |
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| 12 | int & fixup; |
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| 13 | }; |
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| 14 | |
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| 15 | unsigned int frames; // use global because of gcc thunk problem |
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| 16 | |
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| 17 | void nounwind_other(unsigned int dummy) { |
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| 18 | if (frames) { |
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| 19 | frames -= 1; |
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| 20 | try { |
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| 21 | nounwind_other(42); |
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[18783b4] | 22 | if ( frames == -1 ) printf( "42" ); // prevent recursion optimizations |
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[f79ee0d] | 23 | } catchResume (not_raised_exception * ex) { |
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| 24 | ex->fixup = frames + 42; // use local scope => lexical link |
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| 25 | } |
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| 26 | } else { |
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| 27 | int fixup = dummy; |
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| 28 | throwResume (fixup_exception){&fixup_vt, fixup}; // change bad fixup |
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| 29 | } |
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| 30 | } |
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| 31 | |
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| 32 | int main(int argc, char * argv[]) { |
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| 33 | unsigned int times = 1; |
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| 34 | unsigned int total_frames = 1; |
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| 35 | if (1 < argc) { |
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| 36 | times = strto(argv[1], 0p, 10); |
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| 37 | } |
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| 38 | if (2 < argc) { |
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| 39 | total_frames = strto(argv[2], 0p, 10); |
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| 40 | } |
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| 41 | frames = total_frames; |
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| 42 | |
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| 43 | Time start_time = timeHiRes(); |
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| 44 | for (int count = 0 ; count < times ; ++count) { |
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| 45 | try { |
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| 46 | nounwind_other(42); |
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| 47 | } catchResume (fixup_exception * ex) { |
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| 48 | ex->fixup = total_frames + 42; |
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| 49 | } |
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| 50 | } |
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| 51 | Time end_time = timeHiRes(); |
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| 52 | sout | "Run-Time (s): " | wd(0,1, (end_time - start_time)`ns / 1_000_000_000.); |
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| 53 | } |
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