2
** $Id: llimits.h,v 1.69 2005/12/27 17:12:00 roberto Exp $
3
** Limits, basic types, and some other `installation-dependent' definitions
4
** See Copyright Notice in lua.h
18
typedef LUAI_UINT32 lu_int32;
20
typedef LUAI_UMEM lu_mem;
22
typedef LUAI_MEM l_mem;
26
/* chars used as small naturals (so that `char' is reserved for characters) */
27
typedef unsigned char lu_byte;
30
#define MAX_SIZET ((size_t)(~(size_t)0)-2)
32
#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2)
35
#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
38
** conversion of pointer to integer
39
** this is for hashing only; there is no problem if the integer
40
** cannot hold the whole pointer value
42
#define IntPoint(p) ((unsigned int)(lu_mem)(p))
46
/* type to ensure maximum alignment */
47
typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
50
/* result of a `usual argument conversion' over lua_Number */
51
typedef LUAI_UACNUMBER l_uacNumber;
54
/* internal assertions for in-house debugging */
57
#define check_exp(c,e) (lua_assert(c), (e))
58
#define api_check(l,e) lua_assert(e)
62
#define lua_assert(c) ((void)0)
63
#define check_exp(c,e) (e)
64
#define api_check luai_apicheck
70
#define UNUSED(x) ((void)(x)) /* to avoid warnings */
75
#define cast(t, exp) ((t)(exp))
78
#define cast_byte(i) cast(lu_byte, (i))
79
#define cast_num(i) cast(lua_Number, (i))
80
#define cast_int(i) cast(int, (i))
85
** type for virtual-machine instructions
86
** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
88
typedef lu_int32 Instruction;
92
/* maximum stack for a Lua function */
97
/* minimum size for the string table (must be power of 2) */
99
#define MINSTRTABSIZE 32
103
/* minimum size for string buffer */
104
#ifndef LUA_MINBUFFER
105
#define LUA_MINBUFFER 32
110
#define lua_lock(L) ((void) 0)
111
#define lua_unlock(L) ((void) 0)
114
#ifndef luai_threadyield
115
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
120
** macro to control inclusion of some hard tests on stack reallocation
122
#ifndef HARDSTACKTESTS
123
#define condhardstacktests(x) ((void)0)
125
#define condhardstacktests(x) x