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bvk/gist:88879332aeca41a7482c

Created January 22, 2016 22:27
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Go like "defer" for C using GCC extensions
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gistfile1.txt
#define defer_(x) do{}while(0); \
auto void _dtor1_##x(); \
auto void _dtor2_##x(); \
int __attribute__((cleanup(_dtor2_##x))) _dtorV_##x=69; \
void _dtor2_##x(){if(_dtorV_##x==42)return _dtor1_##x();};_dtorV_##x=42; \
void _dtor1_##x()
#define defer__(x) defer_(x)
#define defer defer__(__COUNTER__)
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