vendor: 引入 Lua 3.2 官方源码 + 移植评估 (lua_3.2 分支)

- 前 lua_State 时代 API(全局单例状态机), 与项目多实例+管道模式抽象冲突
- 评估结论: 不建议移植, 详见 doc/ADAPTATION-lua32.md

lib/lua/lmem.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.h $
+** $Id: lmem.h,v 1.8 1999/02/26 15:48:55 roberto Exp $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -8,89 +8,34 @@
 #define lmem_h
 
 
-#include <stddef.h>
+#include <stdlib.h>
 
-#include "llimits.h"
-#include "lua.h"
+/* memory error messages */
+#define codeEM   "code size overflow"
+#define constantEM   "constant table overflow"
+#define refEM   "reference table overflow"
+#define tableEM  "table overflow"
+#define memEM "not enough memory"
+#define arrEM	"internal array bigger than `int' limit"
+
+void *luaM_realloc (void *oldblock, unsigned long size);
+void *luaM_growaux (void *block, unsigned long nelems, int inc, int size,
+                       char *errormsg, unsigned long limit);
+
+#define luaM_free(b)	luaM_realloc((b), 0)
+#define luaM_malloc(t)	luaM_realloc(NULL, (t))
+#define luaM_new(t)          ((t *)luaM_malloc(sizeof(t)))
+#define luaM_newvector(n,t)  ((t *)luaM_malloc((n)*sizeof(t)))
+#define luaM_growvector(v,nelems,inc,t,e,l) \
+          ((v)=(t *)luaM_growaux(v,nelems,inc,sizeof(t),e,l))
+#define luaM_reallocvector(v,n,t) ((v)=(t *)luaM_realloc(v,(n)*sizeof(t)))
 
 
-#define luaM_error(L)	luaD_throw(L, LUA_ERRMEM)
+#ifdef DEBUG
+extern unsigned long numblocks;
+extern unsigned long totalmem;
+#endif
 
 
-/*
-** This macro tests whether it is safe to multiply 'n' by the size of
-** type 't' without overflows. Because 'e' is always constant, it avoids
-** the runtime division MAX_SIZET/(e).
-** (The macro is somewhat complex to avoid warnings:  The 'sizeof'
-** comparison avoids a runtime comparison when overflow cannot occur.
-** The compiler should be able to optimize the real test by itself, but
-** when it does it, it may give a warning about "comparison is always
-** false due to limited range of data type"; the +1 tricks the compiler,
-** avoiding this warning but also this optimization.)
-*/
-#define luaM_testsize(n,e)  \
-	(sizeof(n) >= sizeof(size_t) && cast_sizet((n)) + 1 > MAX_SIZET/(e))
-
-#define luaM_checksize(L,n,e)  \
-	(luaM_testsize(n,e) ? luaM_toobig(L) : cast_void(0))
-
-
-/*
-** Computes the minimum between 'n' and 'MAX_SIZET/sizeof(t)', so that
-** the result is not larger than 'n' and cannot overflow a 'size_t'
-** when multiplied by the size of type 't'. (Assumes that 'n' is an
-** 'int' and that 'int' is not larger than 'size_t'.)
-*/
-#define luaM_limitN(n,t)  \
-  ((cast_sizet(n) <= MAX_SIZET/sizeof(t)) ? (n) :  \
-     cast_int((MAX_SIZET/sizeof(t))))
-
-
-/*
-** Arrays of chars do not need any test
-*/
-#define luaM_reallocvchar(L,b,on,n)  \
-  cast_charp(luaM_saferealloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
-
-#define luaM_freemem(L, b, s)	luaM_free_(L, (b), (s))
-#define luaM_free(L, b)		luaM_free_(L, (b), sizeof(*(b)))
-#define luaM_freearray(L, b, n)   luaM_free_(L, (b), (n)*sizeof(*(b)))
-
-#define luaM_new(L,t)		cast(t*, luaM_malloc_(L, sizeof(t), 0))
-#define luaM_newvector(L,n,t)  \
-	cast(t*, luaM_malloc_(L, cast_sizet(n)*sizeof(t), 0))
-#define luaM_newvectorchecked(L,n,t) \
-  (luaM_checksize(L,n,sizeof(t)), luaM_newvector(L,n,t))
-
-#define luaM_newobject(L,tag,s)	luaM_malloc_(L, (s), tag)
-
-#define luaM_newblock(L, size)	luaM_newvector(L, size, char)
-
-#define luaM_growvector(L,v,nelems,size,t,limit,e) \
-	((v)=cast(t *, luaM_growaux_(L,v,nelems,&(size),sizeof(t), \
-                         luaM_limitN(limit,t),e)))
-
-#define luaM_reallocvector(L, v,oldn,n,t) \
-   (cast(t *, luaM_realloc_(L, v, cast_sizet(oldn) * sizeof(t), \
-                                  cast_sizet(n) * sizeof(t))))
-
-#define luaM_shrinkvector(L,v,size,fs,t) \
-   ((v)=cast(t *, luaM_shrinkvector_(L, v, &(size), fs, sizeof(t))))
-
-LUAI_FUNC l_noret luaM_toobig (lua_State *L);
-
-/* not to be called directly */
-LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
-                                                          size_t size);
-LUAI_FUNC void *luaM_saferealloc_ (lua_State *L, void *block, size_t oldsize,
-                                                              size_t size);
-LUAI_FUNC void luaM_free_ (lua_State *L, void *block, size_t osize);
-LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int nelems,
-                               int *size, unsigned size_elem, int limit,
-                               const char *what);
-LUAI_FUNC void *luaM_shrinkvector_ (lua_State *L, void *block, int *nelem,
-                                    int final_n, unsigned size_elem);
-LUAI_FUNC void *luaM_malloc_ (lua_State *L, size_t size, int tag);
-
 #endif