mirror of
https://github.com/lua/lua
synced 2024-11-30 00:23:24 +03:00
186 lines
3.8 KiB
C
186 lines
3.8 KiB
C
/*
|
|
** $Id: llimits.h,v 1.78 2010/04/19 17:40:13 roberto Exp roberto $
|
|
** Limits, basic types, and some other `installation-dependent' definitions
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
#ifndef llimits_h
|
|
#define llimits_h
|
|
|
|
|
|
#include <limits.h>
|
|
#include <stddef.h>
|
|
|
|
|
|
#include "lua.h"
|
|
|
|
|
|
typedef unsigned LUA_INT32 lu_int32;
|
|
|
|
typedef LUAI_UMEM lu_mem;
|
|
|
|
typedef LUAI_MEM l_mem;
|
|
|
|
|
|
|
|
/* chars used as small naturals (so that `char' is reserved for characters) */
|
|
typedef unsigned char lu_byte;
|
|
|
|
|
|
#define MAX_SIZET ((size_t)(~(size_t)0)-2)
|
|
|
|
#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2)
|
|
#define MIN_LMEM ((l_mem)~((~(lu_mem)0)>>1))
|
|
|
|
|
|
#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
|
|
|
|
/*
|
|
** conversion of pointer to integer
|
|
** this is for hashing only; there is no problem if the integer
|
|
** cannot hold the whole pointer value
|
|
*/
|
|
#define IntPoint(p) ((unsigned int)(lu_mem)(p))
|
|
|
|
|
|
|
|
/* type to ensure maximum alignment */
|
|
#if !defined(LUAI_USER_ALIGNMENT_T)
|
|
#define LUAI_USER_ALIGNMENT_T union { double u; void *s; long l; }
|
|
#endif
|
|
|
|
typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
|
|
|
|
|
|
/* result of a `usual argument conversion' over lua_Number */
|
|
typedef LUAI_UACNUMBER l_uacNumber;
|
|
|
|
|
|
/* internal assertions for in-house debugging */
|
|
#if defined(lua_assert)
|
|
#define check_exp(c,e) (lua_assert(c), (e))
|
|
#else
|
|
#define lua_assert(c) ((void)0)
|
|
#define check_exp(c,e) (e)
|
|
#endif
|
|
|
|
/*
|
|
** assertion for checking API calls
|
|
*/
|
|
#if defined(LUA_USE_APICHECK)
|
|
#include <assert.h>
|
|
#define luai_apicheck(L,e) { (void)L; assert(e); }
|
|
#elif !defined(luai_apicheck)
|
|
#define luai_apicheck(L,e) lua_assert(e)
|
|
#endif
|
|
|
|
#define api_check(l,e,msg) luai_apicheck(l,(e) && msg)
|
|
|
|
|
|
#if !defined(UNUSED)
|
|
#define UNUSED(x) ((void)(x)) /* to avoid warnings */
|
|
#endif
|
|
|
|
|
|
#define cast(t, exp) ((t)(exp))
|
|
|
|
#define cast_byte(i) cast(lu_byte, (i))
|
|
#define cast_num(i) cast(lua_Number, (i))
|
|
#define cast_int(i) cast(int, (i))
|
|
|
|
|
|
/*
|
|
** maximum depth for nested C calls and syntactical nested non-terminals
|
|
** in a program. (Value must fit in an unsigned short int.)
|
|
*/
|
|
#if !defined(LUAI_MAXCCALLS)
|
|
#define LUAI_MAXCCALLS 200
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
** type for virtual-machine instructions
|
|
** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
|
|
*/
|
|
typedef lu_int32 Instruction;
|
|
|
|
|
|
|
|
/* maximum stack for a Lua function */
|
|
#define MAXSTACK 250
|
|
|
|
|
|
|
|
/* minimum size for the string table (must be power of 2) */
|
|
#if !defined(MINSTRTABSIZE)
|
|
#define MINSTRTABSIZE 32
|
|
#endif
|
|
|
|
|
|
/* minimum size for string buffer */
|
|
#if !defined(LUA_MINBUFFER)
|
|
#define LUA_MINBUFFER 32
|
|
#endif
|
|
|
|
|
|
#if !defined(lua_lock)
|
|
#define lua_lock(L) ((void) 0)
|
|
#define lua_unlock(L) ((void) 0)
|
|
#endif
|
|
|
|
#if !defined(luai_threadyield)
|
|
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
|
|
#endif
|
|
|
|
|
|
/*
|
|
** these macros allow user-specific actions on threads when you defined
|
|
** LUAI_EXTRASPACE and need to do something extra when a thread is
|
|
** created/deleted/resumed/yielded.
|
|
*/
|
|
#if !defined(luai_userstateopen)
|
|
#define luai_userstateopen(L) ((void)L)
|
|
#endif
|
|
|
|
#if !defined(luai_userstateclose)
|
|
#define luai_userstateclose(L) ((void)L)
|
|
#endif
|
|
|
|
#if !defined(luai_userstatethread)
|
|
#define luai_userstatethread(L,L1) ((void)L)
|
|
#endif
|
|
|
|
#if !defined(luai_userstatefree)
|
|
#define luai_userstatefree(L,L1) ((void)L)
|
|
#endif
|
|
|
|
#if !defined(luai_userstateresume)
|
|
#define luai_userstateresume(L,n) ((void)L)
|
|
#endif
|
|
|
|
#if !defined(luai_userstateyield)
|
|
#define luai_userstateyield(L,n) ((void)L)
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*
|
|
** macro to control inclusion of some hard tests on stack reallocation
|
|
*/
|
|
#if !defined(HARDSTACKTESTS)
|
|
#define condmovestack(L) ((void)0)
|
|
#else
|
|
/* realloc stack keeping its size */
|
|
#define condmovestack(L) luaD_reallocstack((L), (L)->stacksize)
|
|
#endif
|
|
|
|
#if !defined(HARDMEMTESTS)
|
|
#define condchangemem(L) condmovestack(L)
|
|
#else
|
|
#define condchangemem(L) luaC_fullgc(L, 0)
|
|
#endif
|
|
|
|
#endif
|