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4e47f81188
To-be-closed variables are linked in their own list, embedded into the stack elements. (Due to alignment, this information does not change the size of the stack elements in most architectures.) This new list does not produce garbage and avoids memory errors when creating tbc variables.
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
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** $Id: lfunc.h $
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** Auxiliary functions to manipulate prototypes and closures
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** See Copyright Notice in lua.h
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*/
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#ifndef lfunc_h
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#define lfunc_h
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#include "lobject.h"
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#define sizeCclosure(n) (cast_int(offsetof(CClosure, upvalue)) + \
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cast_int(sizeof(TValue)) * (n))
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#define sizeLclosure(n) (cast_int(offsetof(LClosure, upvals)) + \
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cast_int(sizeof(TValue *)) * (n))
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/* test whether thread is in 'twups' list */
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#define isintwups(L) (L->twups != L)
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/*
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** maximum number of upvalues in a closure (both C and Lua). (Value
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** must fit in a VM register.)
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*/
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#define MAXUPVAL 255
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#define upisopen(up) ((up)->v != &(up)->u.value)
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#define uplevel(up) check_exp(upisopen(up), cast(StkId, (up)->v))
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/*
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** maximum number of misses before giving up the cache of closures
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** in prototypes
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*/
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#define MAXMISS 10
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/* special status to close upvalues preserving the top of the stack */
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#define CLOSEKTOP (-1)
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LUAI_FUNC Proto *luaF_newproto (lua_State *L);
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LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals);
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LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals);
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LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
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LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
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LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level);
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LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level);
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LUAI_FUNC void luaF_close (lua_State *L, StkId level, int status, int yy);
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LUAI_FUNC void luaF_unlinkupval (UpVal *uv);
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LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
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LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
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int pc);
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#endif
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