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Added AI genreated README.md. Needed to be read.
author MrJuneJune <me@mrjunejune.com>
date Sat, 24 Jan 2026 21:52:14 -0800
parents 94705b5986b3
children
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1 /*
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2 ** VM event handling.
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
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4 */
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5
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6 #ifndef _LJ_VMEVENT_H
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7 #define _LJ_VMEVENT_H
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8
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9 #include "lj_obj.h"
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10
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11 /* Registry key for VM event handler table. */
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12 #define LJ_VMEVENTS_REGKEY "_VMEVENTS"
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13 #define LJ_VMEVENTS_HSIZE 4
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14
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15 #define VMEVENT_MASK(ev) ((uint8_t)1 << ((int)(ev) & 7))
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16 #define VMEVENT_HASH(ev) ((int)(ev) & ~7)
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17 #define VMEVENT_HASHIDX(h) ((int)(h) << 3)
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18 #define VMEVENT_NOCACHE 255
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19
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20 #define VMEVENT_DEF(name, hash) \
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21 LJ_VMEVENT_##name##_, \
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22 LJ_VMEVENT_##name = ((LJ_VMEVENT_##name##_) & 7)|((hash) << 3)
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23
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24 /* VM event IDs. */
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25 typedef enum {
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26 VMEVENT_DEF(BC, 0x00003883),
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27 VMEVENT_DEF(TRACE, 0x12d91467),
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28 VMEVENT_DEF(RECORD, 0x1284bf4f),
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29 VMEVENT_DEF(TEXIT, 0x129df2b0),
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30 VMEVENT_DEF(ERRFIN, 0x12d93888),
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31 LJ_VMEVENT__MAX
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32 } VMEvent;
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33
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34 #ifdef LUAJIT_DISABLE_VMEVENT
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35 #define lj_vmevent_send(L, ev, args) UNUSED(L)
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36 #define lj_vmevent_send_(L, ev, args, post) UNUSED(L)
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37 #else
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38 #define lj_vmevent_send(L, ev, args) \
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39 if (G(L)->vmevmask & VMEVENT_MASK(LJ_VMEVENT_##ev)) { \
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40 ptrdiff_t argbase = lj_vmevent_prepare(L, LJ_VMEVENT_##ev); \
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41 if (argbase) { \
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42 args \
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43 lj_vmevent_call(L, argbase); \
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44 } \
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45 }
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46 #define lj_vmevent_send_(L, ev, args, post) \
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47 if (G(L)->vmevmask & VMEVENT_MASK(LJ_VMEVENT_##ev)) { \
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48 ptrdiff_t argbase = lj_vmevent_prepare(L, LJ_VMEVENT_##ev); \
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49 if (argbase) { \
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50 args \
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51 lj_vmevent_call(L, argbase); \
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52 post \
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53 } \
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54 }
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55
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56 LJ_FUNC ptrdiff_t lj_vmevent_prepare(lua_State *L, VMEvent ev);
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57 LJ_FUNC void lj_vmevent_call(lua_State *L, ptrdiff_t argbase);
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58 #endif
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59
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60 #endif