Thierry FOURNIER | 6f1fd48 | 2015-01-23 14:06:13 +0100 | [diff] [blame] | 1 | #include <lauxlib.h> |
| 2 | #include <lua.h> |
| 3 | #include <lualib.h> |
| 4 | |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 5 | #include <ebpttree.h> |
| 6 | |
| 7 | #include <common/cfgparse.h> |
| 8 | |
| 9 | #include <types/hlua.h> |
| 10 | #include <types/proxy.h> |
| 11 | |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 12 | #include <proto/task.h> |
| 13 | |
Thierry FOURNIER | 6f1fd48 | 2015-01-23 14:06:13 +0100 | [diff] [blame] | 14 | /* Lua uses longjmp to perform yield or throwing errors. This |
| 15 | * macro is used only for identifying the function that can |
| 16 | * not return because a longjmp is executed. |
| 17 | * __LJMP marks a prototype of hlua file that can use longjmp. |
| 18 | * WILL_LJMP() marks an lua function that will use longjmp. |
| 19 | * MAY_LJMP() marks an lua function that may use longjmp. |
| 20 | */ |
| 21 | #define __LJMP |
| 22 | #define WILL_LJMP(func) func |
| 23 | #define MAY_LJMP(func) func |
| 24 | |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 25 | /* The main Lua execution context. */ |
| 26 | struct hlua gL; |
| 27 | |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 28 | /* This is the memory pool containing all the signal structs. These |
| 29 | * struct are used to store each requiered signal between two tasks. |
| 30 | */ |
| 31 | struct pool_head *pool2_hlua_com; |
| 32 | |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 33 | /* Store the fast lua context for coroutines. This tree uses the |
| 34 | * Lua stack pointer value as indexed entry, and store the associated |
| 35 | * hlua context. |
| 36 | */ |
| 37 | struct eb_root hlua_ctx = EB_ROOT_UNIQUE; |
| 38 | |
Thierry FOURNIER | 2ba18a2 | 2015-01-23 14:07:08 +0100 | [diff] [blame^] | 39 | /* The following variables contains the reference of the different |
| 40 | * Lua classes. These references are useful for identify metadata |
| 41 | * associated with an object. |
| 42 | */ |
| 43 | static int class_core_ref; |
| 44 | |
Thierry FOURNIER | e8b9a40 | 2015-02-25 18:48:12 +0100 | [diff] [blame] | 45 | /* Used to check an Lua function type in the stack. It creates and |
| 46 | * returns a reference of the function. This function throws an |
| 47 | * error if the rgument is not a "function". |
| 48 | */ |
| 49 | __LJMP unsigned int hlua_checkfunction(lua_State *L, int argno) |
| 50 | { |
| 51 | if (!lua_isfunction(L, argno)) { |
| 52 | const char *msg = lua_pushfstring(L, "function expected, got %s", luaL_typename(L, -1)); |
| 53 | WILL_LJMP(luaL_argerror(L, argno, msg)); |
| 54 | } |
| 55 | lua_pushvalue(L, argno); |
| 56 | return luaL_ref(L, LUA_REGISTRYINDEX); |
| 57 | } |
| 58 | |
| 59 | /* The three following functions are useful for adding entries |
| 60 | * in a table. These functions takes a string and respectively an |
| 61 | * integer, a string or a function and add it to the table in the |
| 62 | * top of the stack. |
| 63 | * |
| 64 | * These functions throws an error if no more stack size is |
| 65 | * available. |
| 66 | */ |
| 67 | __LJMP static inline void hlua_class_const_int(lua_State *L, const char *name, |
| 68 | unsigned int value) |
| 69 | { |
| 70 | if (!lua_checkstack(L, 2)) |
| 71 | WILL_LJMP(luaL_error(L, "full stack")); |
| 72 | lua_pushstring(L, name); |
| 73 | lua_pushunsigned(L, value); |
| 74 | lua_settable(L, -3); |
| 75 | } |
| 76 | __LJMP static inline void hlua_class_const_str(lua_State *L, const char *name, |
| 77 | const char *value) |
| 78 | { |
| 79 | if (!lua_checkstack(L, 2)) |
| 80 | WILL_LJMP(luaL_error(L, "full stack")); |
| 81 | lua_pushstring(L, name); |
| 82 | lua_pushstring(L, value); |
| 83 | lua_settable(L, -3); |
| 84 | } |
| 85 | __LJMP static inline void hlua_class_function(lua_State *L, const char *name, |
| 86 | int (*function)(lua_State *L)) |
| 87 | { |
| 88 | if (!lua_checkstack(L, 2)) |
| 89 | WILL_LJMP(luaL_error(L, "full stack")); |
| 90 | lua_pushstring(L, name); |
| 91 | lua_pushcclosure(L, function, 0); |
| 92 | lua_settable(L, -3); |
| 93 | } |
| 94 | |
| 95 | /* This function check the number of arguments available in the |
| 96 | * stack. If the number of arguments available is not the same |
| 97 | * then <nb> an error is throwed. |
| 98 | */ |
| 99 | __LJMP static inline void check_args(lua_State *L, int nb, char *fcn) |
| 100 | { |
| 101 | if (lua_gettop(L) == nb) |
| 102 | return; |
| 103 | WILL_LJMP(luaL_error(L, "'%s' needs %d arguments", fcn, nb)); |
| 104 | } |
| 105 | |
| 106 | /* Return true if the data in stack[<ud>] is an object of |
| 107 | * type <class_ref>. |
| 108 | */ |
| 109 | static int hlua_udataistype(lua_State *L, int ud, int class_ref) |
| 110 | { |
| 111 | void *p = lua_touserdata(L, ud); |
| 112 | if (!p) |
| 113 | return 0; |
| 114 | |
| 115 | if (!lua_getmetatable(L, ud)) |
| 116 | return 0; |
| 117 | |
| 118 | lua_rawgeti(L, LUA_REGISTRYINDEX, class_ref); |
| 119 | if (!lua_rawequal(L, -1, -2)) { |
| 120 | lua_pop(L, 2); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | lua_pop(L, 2); |
| 125 | return 1; |
| 126 | } |
| 127 | |
| 128 | /* Return an object of the expected type, or throws an error. */ |
| 129 | __LJMP static void *hlua_checkudata(lua_State *L, int ud, int class_ref) |
| 130 | { |
| 131 | if (!hlua_udataistype(L, ud, class_ref)) |
| 132 | WILL_LJMP(luaL_argerror(L, 1, NULL)); |
| 133 | return lua_touserdata(L, ud); |
| 134 | } |
| 135 | |
| 136 | /* This fucntion push an error string prefixed by the file name |
| 137 | * and the line number where the error is encountered. |
| 138 | */ |
| 139 | static int hlua_pusherror(lua_State *L, const char *fmt, ...) |
| 140 | { |
| 141 | va_list argp; |
| 142 | va_start(argp, fmt); |
| 143 | luaL_where(L, 1); |
| 144 | lua_pushvfstring(L, fmt, argp); |
| 145 | va_end(argp); |
| 146 | lua_concat(L, 2); |
| 147 | return 1; |
| 148 | } |
| 149 | |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 150 | /* This function register a new signal. "lua" is the current lua |
| 151 | * execution context. It contains a pointer to the associated task. |
| 152 | * "link" is a list head attached to an other task that must be wake |
| 153 | * the lua task if an event occurs. This is useful with external |
| 154 | * events like TCP I/O or sleep functions. This funcion allocate |
| 155 | * memory for the signal. |
| 156 | */ |
| 157 | static int hlua_com_new(struct hlua *lua, struct list *link) |
| 158 | { |
| 159 | struct hlua_com *com = pool_alloc2(pool2_hlua_com); |
| 160 | if (!com) |
| 161 | return 0; |
| 162 | LIST_ADDQ(&lua->com, &com->purge_me); |
| 163 | LIST_ADDQ(link, &com->wake_me); |
| 164 | com->task = lua->task; |
| 165 | return 1; |
| 166 | } |
| 167 | |
| 168 | /* This function purge all the pending signals when the LUA execution |
| 169 | * is finished. This prevent than a coprocess try to wake a deleted |
| 170 | * task. This function remove the memory associated to the signal. |
| 171 | */ |
| 172 | static void hlua_com_purge(struct hlua *lua) |
| 173 | { |
| 174 | struct hlua_com *com, *back; |
| 175 | |
| 176 | /* Delete all pending communication signals. */ |
| 177 | list_for_each_entry_safe(com, back, &lua->com, purge_me) { |
| 178 | LIST_DEL(&com->purge_me); |
| 179 | LIST_DEL(&com->wake_me); |
| 180 | pool_free2(pool2_hlua_com, com); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | /* This function sends signals. It wakes all the tasks attached |
| 185 | * to a list head, and remove the signal, and free the used |
| 186 | * memory. |
| 187 | */ |
| 188 | static void hlua_com_wake(struct list *wake) |
| 189 | { |
| 190 | struct hlua_com *com, *back; |
| 191 | |
| 192 | /* Wake task and delete all pending communication signals. */ |
| 193 | list_for_each_entry_safe(com, back, wake, wake_me) { |
| 194 | LIST_DEL(&com->purge_me); |
| 195 | LIST_DEL(&com->wake_me); |
| 196 | task_wakeup(com->task, TASK_WOKEN_MSG); |
| 197 | pool_free2(pool2_hlua_com, com); |
| 198 | } |
| 199 | } |
| 200 | |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 201 | /* |
| 202 | * The following functions are used to make correspondance between the the |
| 203 | * executed lua pointer and the "struct hlua *" that contain the context. |
| 204 | * They run with the tree head "hlua_ctx", they just perform lookup in the |
| 205 | * tree. |
| 206 | * |
| 207 | * - hlua_gethlua : return the hlua context associated with an lua_State. |
| 208 | * - hlua_delhlua : remove the association between hlua context and lua_state. |
| 209 | * - hlua_sethlua : create the association between hlua context and lua_state. |
| 210 | */ |
| 211 | static inline struct hlua *hlua_gethlua(lua_State *L) |
| 212 | { |
| 213 | struct ebpt_node *node; |
| 214 | |
| 215 | node = ebpt_lookup(&hlua_ctx, L); |
| 216 | if (!node) |
| 217 | return NULL; |
| 218 | return ebpt_entry(node, struct hlua, node); |
| 219 | } |
| 220 | static inline void hlua_delhlua(struct hlua *hlua) |
| 221 | { |
| 222 | if (hlua->node.key) |
| 223 | ebpt_delete(&hlua->node); |
| 224 | } |
| 225 | static inline void hlua_sethlua(struct hlua *hlua) |
| 226 | { |
| 227 | hlua->node.key = hlua->T; |
| 228 | ebpt_insert(&hlua_ctx, &hlua->node); |
| 229 | } |
| 230 | |
| 231 | /* This function initialises the Lua environment stored in the session. |
| 232 | * It must be called at the start of the session. This function creates |
| 233 | * an LUA coroutine. It can not be use to crete the main LUA context. |
| 234 | */ |
| 235 | int hlua_ctx_init(struct hlua *lua, struct task *task) |
| 236 | { |
| 237 | lua->Mref = LUA_REFNIL; |
| 238 | lua->state = HLUA_STOP; |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 239 | LIST_INIT(&lua->com); |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 240 | lua->T = lua_newthread(gL.T); |
| 241 | if (!lua->T) { |
| 242 | lua->Tref = LUA_REFNIL; |
| 243 | return 0; |
| 244 | } |
| 245 | hlua_sethlua(lua); |
| 246 | lua->Tref = luaL_ref(gL.T, LUA_REGISTRYINDEX); |
| 247 | lua->task = task; |
| 248 | return 1; |
| 249 | } |
| 250 | |
| 251 | /* Used to destroy the Lua coroutine when the attached session or task |
| 252 | * is destroyed. The destroy also the memory context. The struct "lua" |
| 253 | * is not freed. |
| 254 | */ |
| 255 | void hlua_ctx_destroy(struct hlua *lua) |
| 256 | { |
| 257 | /* Remove context. */ |
| 258 | hlua_delhlua(lua); |
| 259 | |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 260 | /* Purge all the pending signals. */ |
| 261 | hlua_com_purge(lua); |
| 262 | |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 263 | /* The thread is garbage collected by Lua. */ |
| 264 | luaL_unref(lua->T, LUA_REGISTRYINDEX, lua->Mref); |
| 265 | luaL_unref(gL.T, LUA_REGISTRYINDEX, lua->Tref); |
| 266 | } |
| 267 | |
| 268 | /* This function is used to restore the Lua context when a coroutine |
| 269 | * fails. This function copy the common memory between old coroutine |
| 270 | * and the new coroutine. The old coroutine is destroyed, and its |
| 271 | * replaced by the new coroutine. |
| 272 | * If the flag "keep_msg" is set, the last entry of the old is assumed |
| 273 | * as string error message and it is copied in the new stack. |
| 274 | */ |
| 275 | static int hlua_ctx_renew(struct hlua *lua, int keep_msg) |
| 276 | { |
| 277 | lua_State *T; |
| 278 | int new_ref; |
| 279 | |
| 280 | /* Renew the main LUA stack doesn't have sense. */ |
| 281 | if (lua == &gL) |
| 282 | return 0; |
| 283 | |
| 284 | /* Remove context. */ |
| 285 | hlua_delhlua(lua); |
| 286 | |
| 287 | /* New Lua coroutine. */ |
| 288 | T = lua_newthread(gL.T); |
| 289 | if (!T) |
| 290 | return 0; |
| 291 | |
| 292 | /* Copy last error message. */ |
| 293 | if (keep_msg) |
| 294 | lua_xmove(lua->T, T, 1); |
| 295 | |
| 296 | /* Copy data between the coroutines. */ |
| 297 | lua_rawgeti(lua->T, LUA_REGISTRYINDEX, lua->Mref); |
| 298 | lua_xmove(lua->T, T, 1); |
| 299 | new_ref = luaL_ref(T, LUA_REGISTRYINDEX); /* Valur poped. */ |
| 300 | |
| 301 | /* Destroy old data. */ |
| 302 | luaL_unref(lua->T, LUA_REGISTRYINDEX, lua->Mref); |
| 303 | |
| 304 | /* The thread is garbage collected by Lua. */ |
| 305 | luaL_unref(gL.T, LUA_REGISTRYINDEX, lua->Tref); |
| 306 | |
| 307 | /* Fill the struct with the new coroutine values. */ |
| 308 | lua->Mref = new_ref; |
| 309 | lua->T = T; |
| 310 | lua->Tref = luaL_ref(gL.T, LUA_REGISTRYINDEX); |
| 311 | |
| 312 | /* Set context. */ |
| 313 | hlua_sethlua(lua); |
| 314 | |
| 315 | return 1; |
| 316 | } |
| 317 | |
| 318 | /* This function start or resumes the Lua stack execution. If the flag |
| 319 | * "yield_allowed" if no set and the LUA stack execution returns a yield |
| 320 | * The function return an error. |
| 321 | * |
| 322 | * The function can returns 4 values: |
| 323 | * - HLUA_E_OK : The execution is terminated without any errors. |
| 324 | * - HLUA_E_AGAIN : The execution must continue at the next associated |
| 325 | * task wakeup. |
| 326 | * - HLUA_E_ERRMSG : An error has occured, an error message is set in |
| 327 | * the top of the stack. |
| 328 | * - HLUA_E_ERR : An error has occured without error message. |
| 329 | * |
| 330 | * If an error occured, the stack is renewed and it is ready to run new |
| 331 | * LUA code. |
| 332 | */ |
| 333 | static enum hlua_exec hlua_ctx_resume(struct hlua *lua, int yield_allowed) |
| 334 | { |
| 335 | int ret; |
| 336 | const char *msg; |
| 337 | |
| 338 | lua->state = HLUA_RUN; |
| 339 | |
| 340 | /* Call the function. */ |
| 341 | ret = lua_resume(lua->T, gL.T, lua->nargs); |
| 342 | switch (ret) { |
| 343 | |
| 344 | case LUA_OK: |
| 345 | ret = HLUA_E_OK; |
| 346 | break; |
| 347 | |
| 348 | case LUA_YIELD: |
| 349 | if (!yield_allowed) { |
| 350 | lua_settop(lua->T, 0); /* Empty the stack. */ |
| 351 | if (!lua_checkstack(lua->T, 1)) { |
| 352 | ret = HLUA_E_ERR; |
| 353 | break; |
| 354 | } |
| 355 | lua_pushfstring(lua->T, "yield not allowed"); |
| 356 | ret = HLUA_E_ERRMSG; |
| 357 | break; |
| 358 | } |
| 359 | ret = HLUA_E_AGAIN; |
| 360 | break; |
| 361 | |
| 362 | case LUA_ERRRUN: |
| 363 | if (!lua_checkstack(lua->T, 1)) { |
| 364 | ret = HLUA_E_ERR; |
| 365 | break; |
| 366 | } |
| 367 | msg = lua_tostring(lua->T, -1); |
| 368 | lua_settop(lua->T, 0); /* Empty the stack. */ |
| 369 | lua_pop(lua->T, 1); |
| 370 | if (msg) |
| 371 | lua_pushfstring(lua->T, "runtime error: %s", msg); |
| 372 | else |
| 373 | lua_pushfstring(lua->T, "unknown runtime error"); |
| 374 | ret = HLUA_E_ERRMSG; |
| 375 | break; |
| 376 | |
| 377 | case LUA_ERRMEM: |
| 378 | lua_settop(lua->T, 0); /* Empty the stack. */ |
| 379 | if (!lua_checkstack(lua->T, 1)) { |
| 380 | ret = HLUA_E_ERR; |
| 381 | break; |
| 382 | } |
| 383 | lua_pushfstring(lua->T, "out of memory error"); |
| 384 | ret = HLUA_E_ERRMSG; |
| 385 | break; |
| 386 | |
| 387 | case LUA_ERRERR: |
| 388 | if (!lua_checkstack(lua->T, 1)) { |
| 389 | ret = HLUA_E_ERR; |
| 390 | break; |
| 391 | } |
| 392 | msg = lua_tostring(lua->T, -1); |
| 393 | lua_settop(lua->T, 0); /* Empty the stack. */ |
| 394 | lua_pop(lua->T, 1); |
| 395 | if (msg) |
| 396 | lua_pushfstring(lua->T, "message handler error: %s", msg); |
| 397 | else |
| 398 | lua_pushfstring(lua->T, "message handler error"); |
| 399 | ret = HLUA_E_ERRMSG; |
| 400 | break; |
| 401 | |
| 402 | default: |
| 403 | lua_settop(lua->T, 0); /* Empty the stack. */ |
| 404 | if (!lua_checkstack(lua->T, 1)) { |
| 405 | ret = HLUA_E_ERR; |
| 406 | break; |
| 407 | } |
| 408 | lua_pushfstring(lua->T, "unknonwn error"); |
| 409 | ret = HLUA_E_ERRMSG; |
| 410 | break; |
| 411 | } |
| 412 | |
| 413 | switch (ret) { |
| 414 | case HLUA_E_AGAIN: |
| 415 | break; |
| 416 | |
| 417 | case HLUA_E_ERRMSG: |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 418 | hlua_com_purge(lua); |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 419 | hlua_ctx_renew(lua, 1); |
| 420 | lua->state = HLUA_STOP; |
| 421 | break; |
| 422 | |
| 423 | case HLUA_E_ERR: |
| 424 | lua->state = HLUA_STOP; |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 425 | hlua_com_purge(lua); |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 426 | hlua_ctx_renew(lua, 0); |
| 427 | break; |
| 428 | |
| 429 | case HLUA_E_OK: |
| 430 | lua->state = HLUA_STOP; |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 431 | hlua_com_purge(lua); |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 432 | break; |
| 433 | } |
| 434 | |
| 435 | return ret; |
| 436 | } |
| 437 | |
Thierry FOURNIER | 6c9b52c | 2015-01-23 15:57:06 +0100 | [diff] [blame] | 438 | /* This function is called by the main configuration key "lua-load". It loads and |
| 439 | * execute an lua file during the parsing of the HAProxy configuration file. It is |
| 440 | * the main lua entry point. |
| 441 | * |
| 442 | * This funtion runs with the HAProxy keywords API. It returns -1 if an error is |
| 443 | * occured, otherwise it returns 0. |
| 444 | * |
| 445 | * In some error case, LUA set an error message in top of the stack. This function |
| 446 | * returns this error message in the HAProxy logs and pop it from the stack. |
| 447 | */ |
| 448 | static int hlua_load(char **args, int section_type, struct proxy *curpx, |
| 449 | struct proxy *defpx, const char *file, int line, |
| 450 | char **err) |
| 451 | { |
| 452 | int error; |
| 453 | |
| 454 | /* Just load and compile the file. */ |
| 455 | error = luaL_loadfile(gL.T, args[1]); |
| 456 | if (error) { |
| 457 | memprintf(err, "error in lua file '%s': %s", args[1], lua_tostring(gL.T, -1)); |
| 458 | lua_pop(gL.T, 1); |
| 459 | return -1; |
| 460 | } |
| 461 | |
| 462 | /* If no syntax error where detected, execute the code. */ |
| 463 | error = lua_pcall(gL.T, 0, LUA_MULTRET, 0); |
| 464 | switch (error) { |
| 465 | case LUA_OK: |
| 466 | break; |
| 467 | case LUA_ERRRUN: |
| 468 | memprintf(err, "lua runtime error: %s\n", lua_tostring(gL.T, -1)); |
| 469 | lua_pop(gL.T, 1); |
| 470 | return -1; |
| 471 | case LUA_ERRMEM: |
| 472 | memprintf(err, "lua out of memory error\n"); |
| 473 | return -1; |
| 474 | case LUA_ERRERR: |
| 475 | memprintf(err, "lua message handler error: %s\n", lua_tostring(gL.T, -1)); |
| 476 | lua_pop(gL.T, 1); |
| 477 | return -1; |
| 478 | case LUA_ERRGCMM: |
| 479 | memprintf(err, "lua garbage collector error: %s\n", lua_tostring(gL.T, -1)); |
| 480 | lua_pop(gL.T, 1); |
| 481 | return -1; |
| 482 | default: |
| 483 | memprintf(err, "lua unknonwn error: %s\n", lua_tostring(gL.T, -1)); |
| 484 | lua_pop(gL.T, 1); |
| 485 | return -1; |
| 486 | } |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | /* configuration keywords declaration */ |
| 492 | static struct cfg_kw_list cfg_kws = {{ },{ |
| 493 | { CFG_GLOBAL, "lua-load", hlua_load }, |
| 494 | { 0, NULL, NULL }, |
| 495 | }}; |
| 496 | |
Thierry FOURNIER | 6f1fd48 | 2015-01-23 14:06:13 +0100 | [diff] [blame] | 497 | void hlua_init(void) |
| 498 | { |
Thierry FOURNIER | 2ba18a2 | 2015-01-23 14:07:08 +0100 | [diff] [blame^] | 499 | int i; |
| 500 | |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 501 | /* Initialise com signals pool session. */ |
| 502 | pool2_hlua_com = create_pool("hlua_com", sizeof(struct hlua_com), MEM_F_SHARED); |
| 503 | |
Thierry FOURNIER | 6c9b52c | 2015-01-23 15:57:06 +0100 | [diff] [blame] | 504 | /* Register configuration keywords. */ |
| 505 | cfg_register_keywords(&cfg_kws); |
| 506 | |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 507 | /* Init main lua stack. */ |
| 508 | gL.Mref = LUA_REFNIL; |
| 509 | gL.state = HLUA_STOP; |
Thierry FOURNIER | 9ff7e6e | 2015-01-23 11:08:20 +0100 | [diff] [blame] | 510 | LIST_INIT(&gL.com); |
Thierry FOURNIER | 380d093 | 2015-01-23 14:27:52 +0100 | [diff] [blame] | 511 | gL.T = luaL_newstate(); |
| 512 | hlua_sethlua(&gL); |
| 513 | gL.Tref = LUA_REFNIL; |
| 514 | gL.task = NULL; |
| 515 | |
| 516 | /* Initialise lua. */ |
| 517 | luaL_openlibs(gL.T); |
Thierry FOURNIER | 2ba18a2 | 2015-01-23 14:07:08 +0100 | [diff] [blame^] | 518 | |
| 519 | /* |
| 520 | * |
| 521 | * Create "core" object. |
| 522 | * |
| 523 | */ |
| 524 | |
| 525 | /* This integer entry is just used as base value for the object "core". */ |
| 526 | lua_pushinteger(gL.T, 0); |
| 527 | |
| 528 | /* Create and fill the metatable. */ |
| 529 | lua_newtable(gL.T); |
| 530 | |
| 531 | /* Create and fill the __index entry. */ |
| 532 | lua_pushstring(gL.T, "__index"); |
| 533 | lua_newtable(gL.T); |
| 534 | |
| 535 | /* Push the loglevel constants. */ |
| 536 | for (i=0; i<NB_LOG_LEVELS; i++) |
| 537 | hlua_class_const_int(gL.T, log_levels[i], i); |
| 538 | |
| 539 | /* Store the table __index in the metable. */ |
| 540 | lua_settable(gL.T, -3); |
| 541 | |
| 542 | /* Register previous table in the registry with named entry. */ |
| 543 | lua_pushvalue(gL.T, -1); /* Copy the -1 entry and push it on the stack. */ |
| 544 | lua_setfield(gL.T, LUA_REGISTRYINDEX, CLASS_CORE); /* register class session. */ |
| 545 | |
| 546 | /* Register previous table in the registry with reference. */ |
| 547 | lua_pushvalue(gL.T, -1); /* Copy the -1 entry and push it on the stack. */ |
| 548 | class_core_ref = luaL_ref(gL.T, LUA_REGISTRYINDEX); /* reference class session. */ |
| 549 | |
| 550 | /* Create new object with class Core. */ |
| 551 | lua_setmetatable(gL.T, -2); |
| 552 | lua_setglobal(gL.T, "core"); |
Thierry FOURNIER | 6f1fd48 | 2015-01-23 14:06:13 +0100 | [diff] [blame] | 553 | } |