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authorJeffrey Armstrong <jeff@approximatrix.com>2020-09-28 20:25:16 -0400
committerJeffrey Armstrong <jeff@approximatrix.com>2020-09-28 20:25:16 -0400
commit334ee3f66a7aad17c9865bd9952b0c501b97721a (patch)
tree0ee71269e8c482e6a2df9cbb37dbe15302136799 /src/lfunc.h
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Initial import based on Lua 5.3.5
Diffstat (limited to 'src/lfunc.h')
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1 files changed, 61 insertions, 0 deletions
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+/*
+** $Id: lfunc.h,v 2.15.1.1 2017/04/19 17:39:34 roberto Exp $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lfunc_h
+#define lfunc_h
+
+
+#include "lobject.h"
+
+
+#define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
+ cast(int, sizeof(TValue)*((n)-1)))
+
+#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
+ cast(int, sizeof(TValue *)*((n)-1)))
+
+
+/* test whether thread is in 'twups' list */
+#define isintwups(L) (L->twups != L)
+
+
+/*
+** maximum number of upvalues in a closure (both C and Lua). (Value
+** must fit in a VM register.)
+*/
+#define MAXUPVAL 255
+
+
+/*
+** Upvalues for Lua closures
+*/
+struct UpVal {
+ TValue *v; /* points to stack or to its own value */
+ lu_mem refcount; /* reference counter */
+ union {
+ struct { /* (when open) */
+ UpVal *next; /* linked list */
+ int touched; /* mark to avoid cycles with dead threads */
+ } open;
+ TValue value; /* the value (when closed) */
+ } u;
+};
+
+#define upisopen(up) ((up)->v != &(up)->u.value)
+
+
+LUAI_FUNC Proto *luaF_newproto (lua_State *L);
+LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems);
+LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems);
+LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
+LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
+LUAI_FUNC void luaF_close (lua_State *L, StkId level);
+LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
+LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
+ int pc);
+
+
+#endif