diff options
Diffstat (limited to 'lauxlib.c')
| -rw-r--r-- | lauxlib.c | 43 |
1 files changed, 0 insertions, 43 deletions
| @@ -290,49 +290,6 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) { | |||
| 290 | /* }====================================================== */ | 290 | /* }====================================================== */ |
| 291 | 291 | ||
| 292 | 292 | ||
| 293 | /* | ||
| 294 | ** {====================================================== | ||
| 295 | ** 'luaL_resourcetryagain' | ||
| 296 | ** This function uses 'errno' to check whether the last error was | ||
| 297 | ** related to lack of resources (e.g., not enough memory or too many | ||
| 298 | ** open files). If so, the function performs a full garbage collection | ||
| 299 | ** to try to release resources, and then it returns 1 to signal to | ||
| 300 | ** the caller that it is worth trying again the failed operation. | ||
| 301 | ** Otherwise, it returns 0. Because error codes are not ANSI C, the | ||
| 302 | ** code must handle any combination of error codes that are defined. | ||
| 303 | ** ======================================================= | ||
| 304 | */ | ||
| 305 | |||
| 306 | LUALIB_API int luaL_resourcetryagain (lua_State *L) { | ||
| 307 | |||
| 308 | /* these are the resource-related errors in Linux */ | ||
| 309 | #if defined(EMFILE) || defined(ENFILE) || defined(ENOMEM) | ||
| 310 | |||
| 311 | #if !defined(EMFILE) /* too many open files in the process */ | ||
| 312 | #define EMFILE -1 /* if not defined, use an impossible value */ | ||
| 313 | #endif | ||
| 314 | |||
| 315 | #if !defined(ENFILE) /* too many open files in the system */ | ||
| 316 | #define ENFILE -1 | ||
| 317 | #endif | ||
| 318 | |||
| 319 | #if !defined(ENOMEM) /* not enough memory */ | ||
| 320 | #define ENOMEM -1 | ||
| 321 | #endif | ||
| 322 | |||
| 323 | if (errno == EMFILE || errno == ENFILE || errno == ENOMEM) { | ||
| 324 | lua_gc(L, LUA_GCCOLLECT); /* try to release resources with a full GC */ | ||
| 325 | return 1; /* signal to try again the creation */ | ||
| 326 | } | ||
| 327 | |||
| 328 | #endif | ||
| 329 | |||
| 330 | return 0; /* else, asume errors are not due to lack of resources */ | ||
| 331 | |||
| 332 | } | ||
| 333 | |||
| 334 | /* }====================================================== */ | ||
| 335 | |||
| 336 | 293 | ||
| 337 | /* | 294 | /* |
| 338 | ** {====================================================== | 295 | ** {====================================================== |
