forked from mia/Aegisub
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/*
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** C data management.
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** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
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*/
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#ifndef _LJ_CDATA_H
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#define _LJ_CDATA_H
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#include "lj_obj.h"
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#include "lj_gc.h"
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#include "lj_ctype.h"
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#if LJ_HASFFI
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/* Get C data pointer. */
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static LJ_AINLINE void *cdata_getptr(void *p, CTSize sz)
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{
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if (LJ_64 && sz == 4) { /* Support 32 bit pointers on 64 bit targets. */
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return ((void *)(uintptr_t)*(uint32_t *)p);
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} else {
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lua_assert(sz == CTSIZE_PTR);
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return *(void **)p;
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}
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}
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/* Set C data pointer. */
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static LJ_AINLINE void cdata_setptr(void *p, CTSize sz, const void *v)
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{
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if (LJ_64 && sz == 4) { /* Support 32 bit pointers on 64 bit targets. */
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*(uint32_t *)p = (uint32_t)(uintptr_t)v;
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} else {
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lua_assert(sz == CTSIZE_PTR);
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*(void **)p = (void *)v;
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}
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}
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/* Allocate fixed-size C data object. */
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static LJ_AINLINE GCcdata *lj_cdata_new(CTState *cts, CTypeID id, CTSize sz)
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{
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GCcdata *cd;
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#ifdef LUA_USE_ASSERT
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CType *ct = ctype_raw(cts, id);
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lua_assert((ctype_hassize(ct->info) ? ct->size : CTSIZE_PTR) == sz);
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#endif
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cd = (GCcdata *)lj_mem_newgco(cts->L, sizeof(GCcdata) + sz);
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cd->gct = ~LJ_TCDATA;
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cd->ctypeid = ctype_check(cts, id);
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return cd;
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}
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/* Variant which works without a valid CTState. */
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static LJ_AINLINE GCcdata *lj_cdata_new_(lua_State *L, CTypeID id, CTSize sz)
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{
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GCcdata *cd = (GCcdata *)lj_mem_newgco(L, sizeof(GCcdata) + sz);
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cd->gct = ~LJ_TCDATA;
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cd->ctypeid = id;
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return cd;
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}
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LJ_FUNC GCcdata *lj_cdata_newref(CTState *cts, const void *pp, CTypeID id);
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LJ_FUNC GCcdata *lj_cdata_newv(CTState *cts, CTypeID id, CTSize sz,
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CTSize align);
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LJ_FUNC void LJ_FASTCALL lj_cdata_free(global_State *g, GCcdata *cd);
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LJ_FUNCA TValue * LJ_FASTCALL lj_cdata_setfin(lua_State *L, GCcdata *cd);
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LJ_FUNC CType *lj_cdata_index(CTState *cts, GCcdata *cd, cTValue *key,
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uint8_t **pp, CTInfo *qual);
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LJ_FUNC int lj_cdata_get(CTState *cts, CType *s, TValue *o, uint8_t *sp);
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LJ_FUNC void lj_cdata_set(CTState *cts, CType *d, uint8_t *dp, TValue *o,
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CTInfo qual);
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#endif
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#endif
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