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annotate third_party/luajit/src/lj_udata.c @ 190:a2725419f988 hg-web

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Updated so that bun builds will with already existing js files.
author MrJuneJune <me@mrjunejune.com>
date Sat, 24 Jan 2026 21:06:42 -0800
parents 94705b5986b3
children
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178
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1 /*
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2 ** Userdata 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 #define lj_udata_c
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7 #define LUA_CORE
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8
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9 #include "lj_obj.h"
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10 #include "lj_gc.h"
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11 #include "lj_err.h"
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12 #include "lj_udata.h"
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13
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14 GCudata *lj_udata_new(lua_State *L, MSize sz, GCtab *env)
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15 {
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16 GCudata *ud = lj_mem_newt(L, sizeof(GCudata) + sz, GCudata);
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17 global_State *g = G(L);
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18 newwhite(g, ud); /* Not finalized. */
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19 ud->gct = ~LJ_TUDATA;
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20 ud->udtype = UDTYPE_USERDATA;
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21 ud->len = sz;
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22 /* NOBARRIER: The GCudata is new (marked white). */
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23 setgcrefnull(ud->metatable);
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24 setgcref(ud->env, obj2gco(env));
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25 /* Chain to userdata list (after main thread). */
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26 setgcrefr(ud->nextgc, mainthread(g)->nextgc);
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27 setgcref(mainthread(g)->nextgc, obj2gco(ud));
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28 return ud;
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29 }
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30
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31 void LJ_FASTCALL lj_udata_free(global_State *g, GCudata *ud)
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32 {
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33 lj_mem_free(g, ud, sizeudata(ud));
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34 }
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35
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36 #if LJ_64
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37 void *lj_lightud_intern(lua_State *L, void *p)
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38 {
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39 global_State *g = G(L);
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40 uint64_t u = (uint64_t)p;
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41 uint32_t up = lightudup(u);
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42 uint32_t *segmap = mref(g->gc.lightudseg, uint32_t);
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43 MSize segnum = g->gc.lightudnum;
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44 if (segmap) {
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45 MSize seg;
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46 for (seg = 0; seg <= segnum; seg++)
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47 if (segmap[seg] == up) /* Fast path. */
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48 return (void *)(((uint64_t)seg << LJ_LIGHTUD_BITS_LO) | lightudlo(u));
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49 segnum++;
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50 /* Leave last segment unused to avoid clash with ITERN key. */
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51 if (segnum >= (1 << LJ_LIGHTUD_BITS_SEG)-1) lj_err_msg(L, LJ_ERR_BADLU);
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52 }
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53 if (!((segnum-1) & segnum) && segnum != 1) {
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54 lj_mem_reallocvec(L, segmap, segnum, segnum ? 2*segnum : 2u, uint32_t);
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55 setmref(g->gc.lightudseg, segmap);
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56 }
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57 g->gc.lightudnum = segnum;
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58 segmap[segnum] = up;
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59 return (void *)(((uint64_t)segnum << LJ_LIGHTUD_BITS_LO) | lightudlo(u));
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60 }
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61 #endif
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62