ocaml/runtime/caml/config.h

/**************************************************************************/
/*                                                                        */
/*                                 OCaml                                  */
/*                                                                        */
/*          Xavier Leroy and Damien Doligez, INRIA Rocquencourt           */
/*                                                                        */
/*   Copyright 1996 Institut National de Recherche en Informatique et     */
/*     en Automatique.                                                    */
/*                                                                        */
/*   All rights reserved.  This file is distributed under the terms of    */
/*   the GNU Lesser General Public License version 2.1, with the          */
/*   special exception on linking described in the file LICENSE.          */
/*                                                                        */
/**************************************************************************/

#ifndef CAML_CONFIG_H
#define CAML_CONFIG_H

#include "m.h"

/* If supported, tell gcc that we can use 32-bit code addresses for
 * threaded code, unless we are compiled for a shared library (-fPIC option) */
#ifdef HAS_ARCH_CODE32
#ifndef __PIC__
#  define ARCH_CODE32
#endif /* __PIC__ */
#endif /* HAS_ARCH_CODE32 */

/* Microsoft introduced the LL integer literal suffix in Visual C++ .NET 2003 */
#if defined(_MSC_VER) && _MSC_VER < 1400
#define INT64_LITERAL(s) s ## i64
#else
#define INT64_LITERAL(s) s ## LL
#endif

#if defined(_MSC_VER) && !defined(__cplusplus)
#define Caml_inline static __inline
#else
#define Caml_inline static inline
#endif

#include "s.h"

#ifdef BOOTSTRAPPING_FLEXLINK
#undef SUPPORT_DYNAMIC_LINKING
#endif

#ifndef CAML_NAME_SPACE
#include "compatibility.h"
#endif

#ifndef CAML_CONFIG_H_NO_TYPEDEFS

#include <stddef.h>

#if defined(HAS_LOCALE_H) || defined(HAS_XLOCALE_H)
#define HAS_LOCALE
#endif

#ifdef HAS_STDINT_H
#include <stdint.h>
#endif

#if defined(__MINGW32__) || (defined(_MSC_VER) && _MSC_VER < 1800)
#define ARCH_SIZET_PRINTF_FORMAT "I"
#else
#define ARCH_SIZET_PRINTF_FORMAT "z"
#endif

/* Types for 32-bit integers, 64-bit integers, and
   native integers (as wide as a pointer type) */

#ifndef ARCH_INT32_TYPE
#if SIZEOF_INT == 4
#define ARCH_INT32_TYPE int
#define ARCH_UINT32_TYPE unsigned int
#define ARCH_INT32_PRINTF_FORMAT ""
#elif SIZEOF_LONG == 4
#define ARCH_INT32_TYPE long
#define ARCH_UINT32_TYPE unsigned long
#define ARCH_INT32_PRINTF_FORMAT "l"
#elif SIZEOF_SHORT == 4
#define ARCH_INT32_TYPE short
#define ARCH_UINT32_TYPE unsigned short
#define ARCH_INT32_PRINTF_FORMAT ""
#else
#error "No 32-bit integer type available"
#endif
#endif

#ifdef __MINGW32__
  #define ARCH_INT64_TYPE long long
  #define ARCH_UINT64_TYPE unsigned long long
  #define ARCH_INT64_PRINTF_FORMAT "I64"
#elif defined(_MSC_VER)
  #define ARCH_INT64_TYPE __int64
  #define ARCH_UINT64_TYPE unsigned __int64
  #define ARCH_INT64_PRINTF_FORMAT "I64"
#else
  #if SIZEOF_LONG == 8
    #define ARCH_INT64_TYPE long
    #define ARCH_UINT64_TYPE unsigned long
    #define ARCH_INT64_PRINTF_FORMAT "l"
  #elif SIZEOF_LONGLONG == 8
    #define ARCH_INT64_TYPE long long
    #define ARCH_UINT64_TYPE unsigned long long
    #define ARCH_INT64_PRINTF_FORMAT "ll"
  #else
    #error "No 64-bit integer type available"
  #endif
#endif

#ifndef HAS_STDINT_H
/* Not a C99 compiler, typically MSVC.  Define the C99 types we use. */
typedef ARCH_INT32_TYPE int32_t;
typedef ARCH_UINT32_TYPE uint32_t;
typedef ARCH_INT64_TYPE int64_t;
typedef ARCH_UINT64_TYPE uint64_t;
#if SIZEOF_SHORT == 2
typedef short int16_t;
typedef unsigned short uint16_t;
#else
#error "No 16-bit integer type available"
#endif
typedef unsigned char uint8_t;
#endif

#if SIZEOF_PTR == SIZEOF_LONG
/* Standard models: ILP32 or I32LP64 */
typedef long intnat;
typedef unsigned long uintnat;
#define ARCH_INTNAT_PRINTF_FORMAT "l"
#elif SIZEOF_PTR == SIZEOF_INT
/* Hypothetical IP32L64 model */
typedef int intnat;
typedef unsigned int uintnat;
#define ARCH_INTNAT_PRINTF_FORMAT ""
#elif SIZEOF_PTR == 8
/* Win64 model: IL32P64 */
typedef int64_t intnat;
typedef uint64_t uintnat;
#define ARCH_INTNAT_PRINTF_FORMAT ARCH_INT64_PRINTF_FORMAT
#else
#error "No integer type available to represent pointers"
#endif

#endif /* CAML_CONFIG_H_NO_TYPEDEFS */

/* Endianness of floats */

/* ARCH_FLOAT_ENDIANNESS encodes the byte order of doubles as follows:
   the value [0xabcdefgh] means that the least significant byte of the
   float is at byte offset [a], the next lsb at [b], ..., and the
   most significant byte at [h]. */

#if defined(__arm__) && !defined(__ARM_EABI__)
#define ARCH_FLOAT_ENDIANNESS 0x45670123
#elif defined(ARCH_BIG_ENDIAN)
#define ARCH_FLOAT_ENDIANNESS 0x76543210
#else
#define ARCH_FLOAT_ENDIANNESS 0x01234567
#endif


/* We use threaded code interpretation if the compiler provides labels
   as first-class values (GCC 2.x). */

#if defined(__GNUC__) && __GNUC__ >= 2 && !defined(DEBUG) \
    && !defined (SHRINKED_GNUC)
#define THREADED_CODE
#endif


/* Memory model parameters */

/* The size of a page for memory management (in bytes) is [1 << Page_log].
   [Page_size] must be a multiple of [sizeof (value)].
   [Page_log] must be be >= 8 and <= 20.
   Do not change the definition of [Page_size]. */
#define Page_log 12             /* A page is 4 kilobytes. */
#define Page_size (1 << Page_log)

/* Initial size of stack (bytes). */
#define Stack_size (4096 * sizeof(value))

/* Minimum free size of stack (bytes); below that, it is reallocated. */
#define Stack_threshold (256 * sizeof(value))

/* Default maximum size of the stack (words). */
#define Max_stack_def (1024 * 1024)


/* Maximum size of a block allocated in the young generation (words). */
/* Must be > 4 */
#define Max_young_wosize 256
#define Max_young_whsize (Whsize_wosize (Max_young_wosize))


/* Minimum size of the minor zone (words).
   This must be at least [2 * Max_young_whsize]. */
#define Minor_heap_min 4096

/* Maximum size of the minor zone (words).
   Must be greater than or equal to [Minor_heap_min].
*/
#define Minor_heap_max (1 << 28)

/* Default size of the minor zone. (words)  */
#define Minor_heap_def 262144


/* Minimum size increment when growing the heap (words).
   Must be a multiple of [Page_size / sizeof (value)]. */
#define Heap_chunk_min (15 * Page_size)

/* Default size increment when growing the heap.
   If this is <= 1000, it's a percentage of the current heap size.
   If it is > 1000, it's a number of words. */
#define Heap_chunk_def 15

/* Default initial size of the major heap (words);
   Must be a multiple of [Page_size / sizeof (value)]. */
#define Init_heap_def (31 * Page_size)
/* (about 512 kB for a 32-bit platform, 1 MB for a 64-bit platform.) */


/* Default speed setting for the major GC.  The heap will grow until
   the dead objects and the free list represent this percentage of the
   total size of live objects. */
#define Percent_free_def 80

/* Default setting for the compacter: 500%
   (i.e. trigger the compacter when 5/6 of the heap is free or garbage)
   This can be set quite high because the overhead is over-estimated
   when fragmentation occurs.
 */
#define Max_percent_free_def 500

/* Default setting for the major GC slice smoothing window: 1
   (i.e. no smoothing)
*/
#define Major_window_def 1

/* Maximum size of the major GC slice smoothing window. */
#define Max_major_window 50

/* Default setting for the ratio of custom garbage to major heap size.
   Documented in gc.mli */
#define Custom_major_ratio_def 44

/* Default setting for the ratio of custom garbage to minor heap size.
   Documented in gc.mli */
#define Custom_minor_ratio_def 100

/* Default setting for maximum size of custom objects counted as garbage
   in the minor heap.
   Documented in gc.mli */
#define Custom_minor_max_bsz_def 8192

#endif /* CAML_CONFIG_H */