diff options
Diffstat (limited to 'apps/plugins/lua/lstate.h')
-rw-r--r-- | apps/plugins/lua/lstate.h | 149 |
1 files changed, 104 insertions, 45 deletions
diff --git a/apps/plugins/lua/lstate.h b/apps/plugins/lua/lstate.h index 94a6249461..daffd9aacf 100644 --- a/apps/plugins/lua/lstate.h +++ b/apps/plugins/lua/lstate.h | |||
@@ -1,5 +1,5 @@ | |||
1 | /* | 1 | /* |
2 | ** $Id$ | 2 | ** $Id: lstate.h,v 2.82.1.1 2013/04/12 18:48:47 roberto Exp $ |
3 | ** Global State | 3 | ** Global State |
4 | ** See Copyright Notice in lua.h | 4 | ** See Copyright Notice in lua.h |
5 | */ | 5 | */ |
@@ -14,26 +14,47 @@ | |||
14 | #include "lzio.h" | 14 | #include "lzio.h" |
15 | 15 | ||
16 | 16 | ||
17 | /* | ||
17 | 18 | ||
18 | struct lua_longjmp; /* defined in ldo.c */ | 19 | ** Some notes about garbage-collected objects: All objects in Lua must |
20 | ** be kept somehow accessible until being freed. | ||
21 | ** | ||
22 | ** Lua keeps most objects linked in list g->allgc. The link uses field | ||
23 | ** 'next' of the CommonHeader. | ||
24 | ** | ||
25 | ** Strings are kept in several lists headed by the array g->strt.hash. | ||
26 | ** | ||
27 | ** Open upvalues are not subject to independent garbage collection. They | ||
28 | ** are collected together with their respective threads. Lua keeps a | ||
29 | ** double-linked list with all open upvalues (g->uvhead) so that it can | ||
30 | ** mark objects referred by them. (They are always gray, so they must | ||
31 | ** be remarked in the atomic step. Usually their contents would be marked | ||
32 | ** when traversing the respective threads, but the thread may already be | ||
33 | ** dead, while the upvalue is still accessible through closures.) | ||
34 | ** | ||
35 | ** Objects with finalizers are kept in the list g->finobj. | ||
36 | ** | ||
37 | ** The list g->tobefnz links all objects being finalized. | ||
19 | 38 | ||
39 | */ | ||
20 | 40 | ||
21 | /* table of globals */ | ||
22 | #define gt(L) (&L->l_gt) | ||
23 | 41 | ||
24 | /* registry */ | 42 | struct lua_longjmp; /* defined in ldo.c */ |
25 | #define registry(L) (&G(L)->l_registry) | 43 | |
26 | 44 | ||
27 | 45 | ||
28 | /* extra stack space to handle TM calls and some other extras */ | 46 | /* extra stack space to handle TM calls and some other extras */ |
29 | #define EXTRA_STACK 5 | 47 | #define EXTRA_STACK 5 |
30 | 48 | ||
31 | 49 | ||
32 | #define BASIC_CI_SIZE 8 | ||
33 | |||
34 | #define BASIC_STACK_SIZE (2*LUA_MINSTACK) | 50 | #define BASIC_STACK_SIZE (2*LUA_MINSTACK) |
35 | 51 | ||
36 | 52 | ||
53 | /* kinds of Garbage Collection */ | ||
54 | #define KGC_NORMAL 0 | ||
55 | #define KGC_EMERGENCY 1 /* gc was forced by an allocation failure */ | ||
56 | #define KGC_GEN 2 /* generational collection */ | ||
57 | |||
37 | 58 | ||
38 | typedef struct stringtable { | 59 | typedef struct stringtable { |
39 | GCObject **hash; | 60 | GCObject **hash; |
@@ -43,54 +64,87 @@ typedef struct stringtable { | |||
43 | 64 | ||
44 | 65 | ||
45 | /* | 66 | /* |
46 | ** informations about a call | 67 | ** information about a call |
47 | */ | 68 | */ |
48 | typedef struct CallInfo { | 69 | typedef struct CallInfo { |
49 | StkId base; /* base for this function */ | ||
50 | StkId func; /* function index in the stack */ | 70 | StkId func; /* function index in the stack */ |
51 | StkId top; /* top for this function */ | 71 | StkId top; /* top for this function */ |
52 | const Instruction *savedpc; | 72 | struct CallInfo *previous, *next; /* dynamic call link */ |
53 | int nresults; /* expected number of results from this function */ | 73 | short nresults; /* expected number of results from this function */ |
54 | int tailcalls; /* number of tail calls lost under this entry */ | 74 | lu_byte callstatus; |
75 | ptrdiff_t extra; | ||
76 | union { | ||
77 | struct { /* only for Lua functions */ | ||
78 | StkId base; /* base for this function */ | ||
79 | const Instruction *savedpc; | ||
80 | } l; | ||
81 | struct { /* only for C functions */ | ||
82 | int ctx; /* context info. in case of yields */ | ||
83 | lua_CFunction k; /* continuation in case of yields */ | ||
84 | ptrdiff_t old_errfunc; | ||
85 | lu_byte old_allowhook; | ||
86 | lu_byte status; | ||
87 | } c; | ||
88 | } u; | ||
55 | } CallInfo; | 89 | } CallInfo; |
56 | 90 | ||
57 | 91 | ||
92 | /* | ||
93 | ** Bits in CallInfo status | ||
94 | */ | ||
95 | #define CIST_LUA (1<<0) /* call is running a Lua function */ | ||
96 | #define CIST_HOOKED (1<<1) /* call is running a debug hook */ | ||
97 | #define CIST_REENTRY (1<<2) /* call is running on same invocation of | ||
98 | luaV_execute of previous call */ | ||
99 | #define CIST_YIELDED (1<<3) /* call reentered after suspension */ | ||
100 | #define CIST_YPCALL (1<<4) /* call is a yieldable protected call */ | ||
101 | #define CIST_STAT (1<<5) /* call has an error status (pcall) */ | ||
102 | #define CIST_TAIL (1<<6) /* call was tail called */ | ||
103 | #define CIST_HOOKYIELD (1<<7) /* last hook called yielded */ | ||
104 | |||
58 | 105 | ||
59 | #define curr_func(L) (clvalue(L->ci->func)) | 106 | #define isLua(ci) ((ci)->callstatus & CIST_LUA) |
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 | 107 | ||
64 | 108 | ||
65 | /* | 109 | /* |
66 | ** `global state', shared by all threads of this state | 110 | ** `global state', shared by all threads of this state |
67 | */ | 111 | */ |
68 | typedef struct global_State { | 112 | typedef struct global_State { |
69 | stringtable strt; /* hash table for strings */ | ||
70 | lua_Alloc frealloc; /* function to reallocate memory */ | 113 | lua_Alloc frealloc; /* function to reallocate memory */ |
71 | void *ud; /* auxiliary data to `frealloc' */ | 114 | void *ud; /* auxiliary data to `frealloc' */ |
115 | lu_mem totalbytes; /* number of bytes currently allocated - GCdebt */ | ||
116 | l_mem GCdebt; /* bytes allocated not yet compensated by the collector */ | ||
117 | lu_mem GCmemtrav; /* memory traversed by the GC */ | ||
118 | lu_mem GCestimate; /* an estimate of the non-garbage memory in use */ | ||
119 | stringtable strt; /* hash table for strings */ | ||
120 | TValue l_registry; | ||
121 | unsigned int seed; /* randomized seed for hashes */ | ||
72 | lu_byte currentwhite; | 122 | lu_byte currentwhite; |
73 | lu_byte gcstate; /* state of garbage collector */ | 123 | lu_byte gcstate; /* state of garbage collector */ |
124 | lu_byte gckind; /* kind of GC running */ | ||
125 | lu_byte gcrunning; /* true if GC is running */ | ||
74 | int sweepstrgc; /* position of sweep in `strt' */ | 126 | int sweepstrgc; /* position of sweep in `strt' */ |
75 | GCObject *rootgc; /* list of all collectable objects */ | 127 | GCObject *allgc; /* list of all collectable objects */ |
76 | GCObject **sweepgc; /* position of sweep in `rootgc' */ | 128 | GCObject *finobj; /* list of collectable objects with finalizers */ |
129 | GCObject **sweepgc; /* current position of sweep in list 'allgc' */ | ||
130 | GCObject **sweepfin; /* current position of sweep in list 'finobj' */ | ||
77 | GCObject *gray; /* list of gray objects */ | 131 | GCObject *gray; /* list of gray objects */ |
78 | GCObject *grayagain; /* list of objects to be traversed atomically */ | 132 | GCObject *grayagain; /* list of objects to be traversed atomically */ |
79 | GCObject *weak; /* list of weak tables (to be cleared) */ | 133 | GCObject *weak; /* list of tables with weak values */ |
80 | GCObject *tmudata; /* last element of list of userdata to be GC */ | 134 | GCObject *ephemeron; /* list of ephemeron tables (weak keys) */ |
81 | Mbuffer buff; /* temporary buffer for string concatentation */ | 135 | GCObject *allweak; /* list of all-weak tables */ |
82 | lu_mem GCthreshold; | 136 | GCObject *tobefnz; /* list of userdata to be GC */ |
83 | lu_mem totalbytes; /* number of bytes currently allocated */ | 137 | UpVal uvhead; /* head of double-linked list of all open upvalues */ |
84 | lu_mem estimate; /* an estimate of number of bytes actually in use */ | 138 | Mbuffer buff; /* temporary buffer for string concatenation */ |
85 | lu_mem gcdept; /* how much GC is `behind schedule' */ | ||
86 | int gcpause; /* size of pause between successive GCs */ | 139 | int gcpause; /* size of pause between successive GCs */ |
140 | int gcmajorinc; /* pause between major collections (only in gen. mode) */ | ||
87 | int gcstepmul; /* GC `granularity' */ | 141 | int gcstepmul; /* GC `granularity' */ |
88 | lua_CFunction panic; /* to be called in unprotected errors */ | 142 | lua_CFunction panic; /* to be called in unprotected errors */ |
89 | TValue l_registry; | ||
90 | struct lua_State *mainthread; | 143 | struct lua_State *mainthread; |
91 | UpVal uvhead; /* head of double-linked list of all open upvalues */ | 144 | const lua_Number *version; /* pointer to version number */ |
92 | struct Table *mt[NUM_TAGS]; /* metatables for basic types */ | 145 | TString *memerrmsg; /* memory-error message */ |
93 | TString *tmname[TM_N]; /* array with tag-method names */ | 146 | TString *tmname[TM_N]; /* array with tag-method names */ |
147 | struct Table *mt[LUA_NUMTAGS]; /* metatables for basic types */ | ||
94 | } global_State; | 148 | } global_State; |
95 | 149 | ||
96 | 150 | ||
@@ -101,29 +155,24 @@ struct lua_State { | |||
101 | CommonHeader; | 155 | CommonHeader; |
102 | lu_byte status; | 156 | lu_byte status; |
103 | StkId top; /* first free slot in the stack */ | 157 | StkId top; /* first free slot in the stack */ |
104 | StkId base; /* base of current function */ | ||
105 | global_State *l_G; | 158 | global_State *l_G; |
106 | CallInfo *ci; /* call info for current function */ | 159 | CallInfo *ci; /* call info for current function */ |
107 | const Instruction *savedpc; /* `savedpc' of current function */ | 160 | const Instruction *oldpc; /* last pc traced */ |
108 | StkId stack_last; /* last free slot in the stack */ | 161 | StkId stack_last; /* last free slot in the stack */ |
109 | StkId stack; /* stack base */ | 162 | StkId stack; /* stack base */ |
110 | CallInfo *end_ci; /* points after end of ci array*/ | ||
111 | CallInfo *base_ci; /* array of CallInfo's */ | ||
112 | int stacksize; | 163 | int stacksize; |
113 | int size_ci; /* size of array `base_ci' */ | 164 | unsigned short nny; /* number of non-yieldable calls in stack */ |
114 | unsigned short nCcalls; /* number of nested C calls */ | 165 | unsigned short nCcalls; /* number of nested C calls */ |
115 | unsigned short baseCcalls; /* nested C calls when resuming coroutine */ | ||
116 | lu_byte hookmask; | 166 | lu_byte hookmask; |
117 | lu_byte allowhook; | 167 | lu_byte allowhook; |
118 | int basehookcount; | 168 | int basehookcount; |
119 | int hookcount; | 169 | int hookcount; |
120 | lua_Hook hook; | 170 | lua_Hook hook; |
121 | TValue l_gt; /* table of globals */ | ||
122 | TValue env; /* temporary place for environments */ | ||
123 | GCObject *openupval; /* list of open upvalues in this stack */ | 171 | GCObject *openupval; /* list of open upvalues in this stack */ |
124 | GCObject *gclist; | 172 | GCObject *gclist; |
125 | struct lua_longjmp *errorJmp; /* current error recover point */ | 173 | struct lua_longjmp *errorJmp; /* current error recover point */ |
126 | ptrdiff_t errfunc; /* current error handling function (stack index) */ | 174 | ptrdiff_t errfunc; /* current error handling function (stack index) */ |
175 | CallInfo base_ci; /* CallInfo for first level (C calling Lua) */ | ||
127 | }; | 176 | }; |
128 | 177 | ||
129 | 178 | ||
@@ -134,7 +183,7 @@ struct lua_State { | |||
134 | ** Union of all collectable objects | 183 | ** Union of all collectable objects |
135 | */ | 184 | */ |
136 | union GCObject { | 185 | union GCObject { |
137 | GCheader gch; | 186 | GCheader gch; /* common header */ |
138 | union TString ts; | 187 | union TString ts; |
139 | union Udata u; | 188 | union Udata u; |
140 | union Closure cl; | 189 | union Closure cl; |
@@ -145,25 +194,35 @@ union GCObject { | |||
145 | }; | 194 | }; |
146 | 195 | ||
147 | 196 | ||
197 | #define gch(o) (&(o)->gch) | ||
198 | |||
148 | /* macros to convert a GCObject into a specific value */ | 199 | /* macros to convert a GCObject into a specific value */ |
149 | #define rawgco2ts(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts)) | 200 | #define rawgco2ts(o) \ |
201 | check_exp(novariant((o)->gch.tt) == LUA_TSTRING, &((o)->ts)) | ||
150 | #define gco2ts(o) (&rawgco2ts(o)->tsv) | 202 | #define gco2ts(o) (&rawgco2ts(o)->tsv) |
151 | #define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u)) | 203 | #define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u)) |
152 | #define gco2u(o) (&rawgco2u(o)->uv) | 204 | #define gco2u(o) (&rawgco2u(o)->uv) |
153 | #define gco2cl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl)) | 205 | #define gco2lcl(o) check_exp((o)->gch.tt == LUA_TLCL, &((o)->cl.l)) |
154 | #define gco2h(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h)) | 206 | #define gco2ccl(o) check_exp((o)->gch.tt == LUA_TCCL, &((o)->cl.c)) |
207 | #define gco2cl(o) \ | ||
208 | check_exp(novariant((o)->gch.tt) == LUA_TFUNCTION, &((o)->cl)) | ||
209 | #define gco2t(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h)) | ||
155 | #define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p)) | 210 | #define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p)) |
156 | #define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv)) | 211 | #define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv)) |
157 | #define ngcotouv(o) \ | ||
158 | check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv)) | ||
159 | #define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th)) | 212 | #define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th)) |
160 | 213 | ||
161 | /* macro to convert any Lua object into a GCObject */ | 214 | /* macro to convert any Lua object into a GCObject */ |
162 | #define obj2gco(v) (cast(GCObject *, (v))) | 215 | #define obj2gco(v) (cast(GCObject *, (v))) |
163 | 216 | ||
164 | 217 | ||
165 | LUAI_FUNC lua_State *luaE_newthread (lua_State *L); | 218 | /* actual number of total bytes allocated */ |
219 | #define gettotalbytes(g) ((g)->totalbytes + (g)->GCdebt) | ||
220 | |||
221 | LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt); | ||
166 | LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1); | 222 | LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1); |
223 | LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L); | ||
224 | LUAI_FUNC void luaE_freeCI (lua_State *L); | ||
225 | |||
167 | 226 | ||
168 | #endif | 227 | #endif |
169 | 228 | ||