ceph/src/civetweb/src/third_party/lua-5.3.3/src/lfunc.h

   1 /*
   2 ** $Id: lfunc.h,v 2.15 2015/01/13 15:49:11 roberto Exp $
   3 ** Auxiliary functions to manipulate prototypes and closures
   4 ** See Copyright Notice in lua.h
   5 */
   6
   7 #ifndef lfunc_h
   8 #define lfunc_h
   9
  10
  11 #include "lobject.h"
  12
  13
  14 #define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
  15                          cast(int, sizeof(TValue)*((n)-1)))
  16
  17 #define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
  18                          cast(int, sizeof(TValue *)*((n)-1)))
  19
  20
  21 /* test whether thread is in 'twups' list */
  22 #define isintwups(L)    (L->twups != L)
  23
  24
  25 /*
  26 ** maximum number of upvalues in a closure (both C and Lua). (Value
  27 ** must fit in a VM register.)
  28 */
  29 #define MAXUPVAL        255
  30
  31
  32 /*
  33 ** Upvalues for Lua closures
  34 */
  35 struct UpVal {
  36   TValue *v;  /* points to stack or to its own value */
  37   lu_mem refcount;  /* reference counter */
  38   union {
  39     struct {  /* (when open) */
  40       UpVal *next;  /* linked list */
  41       int touched;  /* mark to avoid cycles with dead threads */
  42     } open;
  43     TValue value;  /* the value (when closed) */
  44   } u;
  45 };
  46
  47 #define upisopen(up)    ((up)->v != &(up)->u.value)
  48
  49
  50 LUAI_FUNC Proto *luaF_newproto (lua_State *L);
  51 LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems);
  52 LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems);
  53 LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
  54 LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
  55 LUAI_FUNC void luaF_close (lua_State *L, StkId level);
  56 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
  57 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
  58                                          int pc);
  59
  60
  61 #endif