A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/*
2** $Id$
3** Global State
4** See Copyright Notice in lua.h
5*/
6
7#ifndef lstate_h
8#define lstate_h
9
10#include "lua.h"
11
12#include "lobject.h"
13#include "ltm.h"
14#include "lzio.h"
15
16
17
18struct lua_longjmp; /* defined in ldo.c */
19
20
21/* table of globals */
22#define gt(L) (&L->l_gt)
23
24/* registry */
25#define registry(L) (&G(L)->l_registry)
26
27
28/* extra stack space to handle TM calls and some other extras */
29#define EXTRA_STACK 5
30
31
32#define BASIC_CI_SIZE 8
33
34#define BASIC_STACK_SIZE (2*LUA_MINSTACK)
35
36
37
38typedef struct stringtable {
39 GCObject **hash;
40 lu_int32 nuse; /* number of elements */
41 int size;
42} stringtable;
43
44
45/*
46** informations about a call
47*/
48typedef struct CallInfo {
49 StkId base; /* base for this function */
50 StkId func; /* function index in the stack */
51 StkId top; /* top for this function */
52 const Instruction *savedpc;
53 int nresults; /* expected number of results from this function */
54 int tailcalls; /* number of tail calls lost under this entry */
55} CallInfo;
56
57
58
59#define curr_func(L) (clvalue(L->ci->func))
60#define ci_func(ci) (clvalue((ci)->func))
61#define f_isLua(ci) (!ci_func(ci)->c.isC)
62#define isLua(ci) (ttisfunction((ci)->func) && f_isLua(ci))
63
64
65/*
66** `global state', shared by all threads of this state
67*/
68typedef struct global_State {
69 stringtable strt; /* hash table for strings */
70 lua_Alloc frealloc; /* function to reallocate memory */
71 void *ud; /* auxiliary data to `frealloc' */
72 lu_byte currentwhite;
73 lu_byte gcstate; /* state of garbage collector */
74 lu_byte gcflags; /* flags for the garbage collector */
75 int sweepstrgc; /* position of sweep in `strt' */
76 GCObject *rootgc; /* list of all collectable objects */
77 GCObject **sweepgc; /* position of sweep in `rootgc' */
78 GCObject *gray; /* list of gray objects */
79 GCObject *grayagain; /* list of objects to be traversed atomically */
80 GCObject *weak; /* list of weak tables (to be cleared) */
81 GCObject *tmudata; /* last element of list of userdata to be GC */
82 Mbuffer buff; /* temporary buffer for string concatentation */
83 lu_mem GCthreshold;
84 lu_mem totalbytes; /* number of bytes currently allocated */
85 lu_mem estimate; /* an estimate of number of bytes actually in use */
86 lu_mem gcdept; /* how much GC is `behind schedule' */
87 int gcpause; /* size of pause between successive GCs */
88 int gcstepmul; /* GC `granularity' */
89 lua_CFunction panic; /* to be called in unprotected errors */
90 TValue l_registry;
91 struct lua_State *mainthread;
92 UpVal uvhead; /* head of double-linked list of all open upvalues */
93 struct Table *mt[NUM_TAGS]; /* metatables for basic types */
94 TString *tmname[TM_N]; /* array with tag-method names */
95} global_State;
96
97
98/*
99** `per thread' state
100*/
101struct lua_State {
102 CommonHeader;
103 lu_byte status;
104 StkId top; /* first free slot in the stack */
105 StkId base; /* base of current function */
106 global_State *l_G;
107 CallInfo *ci; /* call info for current function */
108 const Instruction *savedpc; /* `savedpc' of current function */
109 StkId stack_last; /* last free slot in the stack */
110 StkId stack; /* stack base */
111 CallInfo *end_ci; /* points after end of ci array*/
112 CallInfo *base_ci; /* array of CallInfo's */
113 int stacksize;
114 int size_ci; /* size of array `base_ci' */
115 unsigned short nCcalls; /* number of nested C calls */
116 unsigned short baseCcalls; /* nested C calls when resuming coroutine */
117 lu_byte hookmask;
118 lu_byte allowhook;
119 int basehookcount;
120 int hookcount;
121 lua_Hook hook;
122 TValue l_gt; /* table of globals */
123 TValue env; /* temporary place for environments */
124 GCObject *openupval; /* list of open upvalues in this stack */
125 GCObject *gclist;
126 struct lua_longjmp *errorJmp; /* current error recover point */
127 ptrdiff_t errfunc; /* current error handling function (stack index) */
128};
129
130
131#define G(L) (L->l_G)
132
133
134/*
135** Union of all collectable objects
136*/
137union GCObject {
138 GCheader gch;
139 union TString ts;
140 union Udata u;
141 union Closure cl;
142 struct Table h;
143 struct Proto p;
144 struct UpVal uv;
145 struct lua_State th; /* thread */
146};
147
148
149/* macros to convert a GCObject into a specific value */
150#define rawgco2ts(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
151#define gco2ts(o) (&rawgco2ts(o)->tsv)
152#define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
153#define gco2u(o) (&rawgco2u(o)->uv)
154#define gco2cl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl))
155#define gco2h(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
156#define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
157#define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
158#define ngcotouv(o) \
159 check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
160#define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
161
162/* macro to convert any Lua object into a GCObject */
163#define obj2gco(v) (cast(GCObject *, (v)))
164
165
166LUAI_FUNC lua_State *luaE_newthread (lua_State *L);
167LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
168
169#endif
170