[redis.git] / deps / lua / src / llimits.h

/*
** $Id: llimits.h,v 1.69.1.1 2007/12/27 13:02:25 roberto Exp $
** 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 LUAI_UINT32 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 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 */
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 */
#ifdef lua_assert

#define check_exp(c,e)		(lua_assert(c), (e))
#define api_check(l,e)		lua_assert(e)

#else

#define lua_assert(c)		((void)0)
#define check_exp(c,e)		(e)
#define api_check		luai_apicheck

#endif


#ifndef UNUSED
#define UNUSED(x)	((void)(x))	/* to avoid warnings */
#endif


#ifndef cast
#define cast(t, exp)	((t)(exp))
#endif

#define cast_byte(i)	cast(lu_byte, (i))
#define cast_num(i)	cast(lua_Number, (i))
#define cast_int(i)	cast(int, (i))


/*
** 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) */
#ifndef MINSTRTABSIZE
#define MINSTRTABSIZE	32
#endif


/* minimum size for string buffer */
#ifndef LUA_MINBUFFER
#define LUA_MINBUFFER	32
#endif


#ifndef lua_lock
#define lua_lock(L)     ((void) 0) 
#define lua_unlock(L)   ((void) 0)
#endif

#ifndef luai_threadyield
#define luai_threadyield(L)     {lua_unlock(L); lua_lock(L);}
#endif


/*
** macro to control inclusion of some hard tests on stack reallocation
*/ 
#ifndef HARDSTACKTESTS
#define condhardstacktests(x)	((void)0)
#else
#define condhardstacktests(x)	x
#endif

#endif
Commit	Line	Data
21d3294c	1	/*
	2	** $Id: llimits.h,v 1.69.1.1 2007/12/27 13:02:25 roberto Exp $
	3	** Limits, basic types, and some other `installation-dependent' definitions
	4	** See Copyright Notice in lua.h
	5	*/
	6
	7	#ifndef llimits_h
	8	#define llimits_h
	9
	10
	11	#include <limits.h>
	12	#include <stddef.h>
	13
	14
	15	#include "lua.h"
	16
	17
	18	typedef LUAI_UINT32 lu_int32;
	19
	20	typedef LUAI_UMEM lu_mem;
	21
	22	typedef LUAI_MEM l_mem;
	23
	24
	25
	26	/* chars used as small naturals (so that `char' is reserved for characters) */
	27	typedef unsigned char lu_byte;
	28
	29
	30	#define MAX_SIZET ((size_t)(~(size_t)0)-2)
	31
	32	#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2)
	33
	34
	35	#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
	36
	37	/*
	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
	41	*/
	42	#define IntPoint(p) ((unsigned int)(lu_mem)(p))
	43
	44
	45
	46	/* type to ensure maximum alignment */
	47	typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
	48
	49
	50	/* result of a `usual argument conversion' over lua_Number */
	51	typedef LUAI_UACNUMBER l_uacNumber;
	52
	53
	54	/* internal assertions for in-house debugging */
	55	#ifdef lua_assert
	56
	57	#define check_exp(c,e) (lua_assert(c), (e))
	58	#define api_check(l,e) lua_assert(e)
	59
	60	#else
	61
	62	#define lua_assert(c) ((void)0)
	63	#define check_exp(c,e) (e)
	64	#define api_check luai_apicheck
65
66	#endif
67
68
69	#ifndef UNUSED
70	#define UNUSED(x) ((void)(x)) /* to avoid warnings */
71	#endif
72
73
74	#ifndef cast
75	#define cast(t, exp) ((t)(exp))
76	#endif
77
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))
81
82
83
84	/*
85	** type for virtual-machine instructions
86	** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
87	*/
88	typedef lu_int32 Instruction;
89
90
91
92	/* maximum stack for a Lua function */
93	#define MAXSTACK 250
94
95
96
97	/* minimum size for the string table (must be power of 2) */
98	#ifndef MINSTRTABSIZE
99	#define MINSTRTABSIZE 32
100	#endif
101
102
103	/* minimum size for string buffer */
104	#ifndef LUA_MINBUFFER
105	#define LUA_MINBUFFER 32
106	#endif
107
108
109	#ifndef lua_lock
110	#define lua_lock(L) ((void) 0)
111	#define lua_unlock(L) ((void) 0)
112	#endif
113
114	#ifndef luai_threadyield
115	#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
116	#endif
117
118
119	/*
120	** macro to control inclusion of some hard tests on stack reallocation
121	*/
122	#ifndef HARDSTACKTESTS
123	#define condhardstacktests(x) ((void)0)
124	#else
125	#define condhardstacktests(x) x
126	#endif
127
128	#endif