lustrec / include / arrow.h @ f044d0b0
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| 1 | c6acbdaa | xthirioux | |
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| 2 | #ifndef _ARROW
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| 3 | #define _ARROW
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| 4 | |||
| 5 | struct _arrow_mem {struct _arrow_reg {_Bool _first; } _reg; }; |
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| 6 | |||
| 7 | 9bdfc99f | xthirioux | extern struct _arrow_mem *_arrow_alloc (); |
| 8 | c6acbdaa | xthirioux | |
| 9 | 9bdfc99f | xthirioux | #define _arrow_DECLARE(attr, inst)\
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| 10 | attr struct _arrow_mem inst;
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| 11 | c6acbdaa | xthirioux | |
| 12 | #define _arrow_LINK(inst) do {\ |
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| 13 | ;\ |
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| 14 | } while (0) |
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| 15 | |||
| 16 | 9bdfc99f | xthirioux | #define _arrow_ALLOC(attr, inst)\
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| 17 | _arrow_DECLARE(attr, inst);\ |
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| 18 | _arrow_LINK(inst) |
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| 19 | |||
| 20 | c6acbdaa | xthirioux | #define _arrow_step(x,y,output,self) ((self)->_reg._first?((self)->_reg._first=0,(*output = x)):(*output = y)) |
| 21 | |||
| 22 | #define _arrow_reset(self) {(self)->_reg._first = 1;} |
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| 23 | |||
| 24 | 14ebde97 | xthirioux | /* Step macro for specialized arrows of the form: (true -> false) */
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| 25 | |||
| 26 | #define _once_step(output,self) { *output = (self)->_reg._first; if ((self)->_reg._first) { (self)->_reg._first=0; }; } |
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| 27 | |||
| 28 | c6acbdaa | xthirioux | #endif |