1/*
2** C data management.
3** Copyright (C) 2005-2014 Mike Pall. See Copyright Notice in luajit.h
4*/
5
6#ifndef _LJ_CDATA_H
7#define _LJ_CDATA_H
8
9#include "lj_obj.h"
10#include "lj_gc.h"
11#include "lj_ctype.h"
12
13#if LJ_HASFFI
14
15/* Get C data pointer. */
16static LJ_AINLINE void *cdata_getptr(void *p, CTSize sz)
17{
18 if (LJ_64 && sz == 4) { /* Support 32 bit pointers on 64 bit targets. */
19 return ((void *)(uintptr_t)*(uint32_t *)p);
20 } else {
21 lua_assert(sz == CTSIZE_PTR);
22 return *(void **)p;
23 }
24}
25
26/* Set C data pointer. */
27static LJ_AINLINE void cdata_setptr(void *p, CTSize sz, const void *v)
28{
29 if (LJ_64 && sz == 4) { /* Support 32 bit pointers on 64 bit targets. */
30 *(uint32_t *)p = (uint32_t)(uintptr_t)v;
31 } else {
32 lua_assert(sz == CTSIZE_PTR);
33 *(void **)p = (void *)v;
34 }
35}
36
37/* Allocate fixed-size C data object. */
38static LJ_AINLINE GCcdata *lj_cdata_new(CTState *cts, CTypeID id, CTSize sz)
39{
40 GCcdata *cd;
41#ifdef LUA_USE_ASSERT
42 CType *ct = ctype_raw(cts, id);
43 lua_assert((ctype_hassize(ct->info) ? ct->size : CTSIZE_PTR) == sz);
44#endif
45 cd = (GCcdata *)lj_mem_newgco(cts->L, sizeof(GCcdata) + sz);
46 cd->gct = ~LJ_TCDATA;
47 cd->ctypeid = ctype_check(cts, id);
48 return cd;
49}
50
51/* Variant which works without a valid CTState. */
52static LJ_AINLINE GCcdata *lj_cdata_new_(lua_State *L, CTypeID id, CTSize sz)
53{
54 GCcdata *cd = (GCcdata *)lj_mem_newgco(L, sizeof(GCcdata) + sz);
55 cd->gct = ~LJ_TCDATA;
56 cd->ctypeid = id;
57 return cd;
58}
59
60LJ_FUNC GCcdata *lj_cdata_newref(CTState *cts, const void *pp, CTypeID id);
61LJ_FUNC GCcdata *lj_cdata_newv(CTState *cts, CTypeID id, CTSize sz,
62 CTSize align);
63
64LJ_FUNC void LJ_FASTCALL lj_cdata_free(global_State *g, GCcdata *cd);
65LJ_FUNCA TValue * LJ_FASTCALL lj_cdata_setfin(lua_State *L, GCcdata *cd);
66
67LJ_FUNC CType *lj_cdata_index(CTState *cts, GCcdata *cd, cTValue *key,
68 uint8_t **pp, CTInfo *qual);
69LJ_FUNC int lj_cdata_get(CTState *cts, CType *s, TValue *o, uint8_t *sp);
70LJ_FUNC void lj_cdata_set(CTState *cts, CType *d, uint8_t *dp, TValue *o,
71 CTInfo qual);
72
73#endif
74
75#endif
76