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/js/src/ctypes/libffi/include/ffi.h.in

http://github.com/zpao/v8monkey
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  1/* -----------------------------------------------------------------*-C-*-
  2   libffi @VERSION@ - Copyright (c) 1996-2003, 2007, 2008  Red Hat, Inc.
  3
  4   Permission is hereby granted, free of charge, to any person obtaining
  5   a copy of this software and associated documentation files (the
  6   ``Software''), to deal in the Software without restriction, including
  7   without limitation the rights to use, copy, modify, merge, publish,
  8   distribute, sublicense, and/or sell copies of the Software, and to
  9   permit persons to whom the Software is furnished to do so, subject to
 10   the following conditions:
 11
 12   The above copyright notice and this permission notice shall be included
 13   in all copies or substantial portions of the Software.
 14
 15   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
 16   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 17   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 18   NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 19   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 20   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 22   DEALINGS IN THE SOFTWARE.
 23
 24   ----------------------------------------------------------------------- */
 25
 26/* -------------------------------------------------------------------
 27   The basic API is described in the README file.
 28
 29   The raw API is designed to bypass some of the argument packing
 30   and unpacking on architectures for which it can be avoided.
 31
 32   The closure API allows interpreted functions to be packaged up
 33   inside a C function pointer, so that they can be called as C functions,
 34   with no understanding on the client side that they are interpreted.
 35   It can also be used in other cases in which it is necessary to package
 36   up a user specified parameter and a function pointer as a single
 37   function pointer.
 38
 39   The closure API must be implemented in order to get its functionality,
 40   e.g. for use by gij.  Routines are provided to emulate the raw API
 41   if the underlying platform doesn't allow faster implementation.
 42
 43   More details on the raw and cloure API can be found in:
 44
 45   http://gcc.gnu.org/ml/java/1999-q3/msg00138.html
 46
 47   and
 48
 49   http://gcc.gnu.org/ml/java/1999-q3/msg00174.html
 50   -------------------------------------------------------------------- */
 51
 52#ifndef LIBFFI_H
 53#define LIBFFI_H
 54
 55#ifdef __cplusplus
 56extern "C" {
 57#endif
 58
 59/* Specify which architecture libffi is configured for. */
 60#ifndef @TARGET@
 61#define @TARGET@
 62#endif
 63
 64/* ---- System configuration information --------------------------------- */
 65
 66#include <ffitarget.h>
 67
 68#ifndef LIBFFI_ASM
 69
 70#ifdef _MSC_VER
 71#define __attribute__(X)
 72#endif
 73
 74#include <stddef.h>
 75#include <limits.h>
 76
 77/* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example).
 78   But we can find it either under the correct ANSI name, or under GNU
 79   C's internal name.  */
 80
 81#define FFI_64_BIT_MAX 9223372036854775807
 82
 83#ifdef LONG_LONG_MAX
 84# define FFI_LONG_LONG_MAX LONG_LONG_MAX
 85#else
 86# ifdef LLONG_MAX
 87#  define FFI_LONG_LONG_MAX LLONG_MAX
 88# else
 89#  ifdef __GNUC__
 90#   define FFI_LONG_LONG_MAX __LONG_LONG_MAX__
 91#  endif
 92#  ifdef _AIX
 93#   ifndef __PPC64__
 94#    if defined (__IBMC__) || defined (__IBMCPP__)
 95#     define FFI_LONG_LONG_MAX LONGLONG_MAX
 96#    endif
 97#   endif /* __PPC64__ */
 98#   undef  FFI_64_BIT_MAX
 99#   define FFI_64_BIT_MAX 9223372036854775807LL
100#  endif
101# endif
102#endif
103
104/* The closure code assumes that this works on pointers, i.e. a size_t	*/
105/* can hold a pointer.							*/
106
107typedef struct _ffi_type
108{
109  size_t size;
110  unsigned short alignment;
111  unsigned short type;
112  struct _ffi_type **elements;
113} ffi_type;
114
115#ifndef LIBFFI_HIDE_BASIC_TYPES
116#if SCHAR_MAX == 127
117# define ffi_type_uchar                ffi_type_uint8
118# define ffi_type_schar                ffi_type_sint8
119#else
120 #error "char size not supported"
121#endif
122
123#if SHRT_MAX == 32767
124# define ffi_type_ushort       ffi_type_uint16
125# define ffi_type_sshort       ffi_type_sint16
126#elif SHRT_MAX == 2147483647
127# define ffi_type_ushort       ffi_type_uint32
128# define ffi_type_sshort       ffi_type_sint32
129#else
130 #error "short size not supported"
131#endif
132
133#if INT_MAX == 32767
134# define ffi_type_uint         ffi_type_uint16
135# define ffi_type_sint         ffi_type_sint16
136#elif INT_MAX == 2147483647
137# define ffi_type_uint         ffi_type_uint32
138# define ffi_type_sint         ffi_type_sint32
139#elif INT_MAX == 9223372036854775807
140# define ffi_type_uint         ffi_type_uint64
141# define ffi_type_sint         ffi_type_sint64
142#else
143 #error "int size not supported"
144#endif
145
146#if LONG_MAX == 2147483647
147# if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX
148 #error "no 64-bit data type supported"
149# endif
150#elif LONG_MAX != FFI_64_BIT_MAX
151 #error "long size not supported"
152#endif
153
154#if LONG_MAX == 2147483647
155# define ffi_type_ulong        ffi_type_uint32
156# define ffi_type_slong        ffi_type_sint32
157#elif LONG_MAX == FFI_64_BIT_MAX
158# define ffi_type_ulong        ffi_type_uint64
159# define ffi_type_slong        ffi_type_sint64
160#else
161 #error "long size not supported"
162#endif
163
164/* These are defined in types.c */
165extern ffi_type ffi_type_void;
166extern ffi_type ffi_type_uint8;
167extern ffi_type ffi_type_sint8;
168extern ffi_type ffi_type_uint16;
169extern ffi_type ffi_type_sint16;
170extern ffi_type ffi_type_uint32;
171extern ffi_type ffi_type_sint32;
172extern ffi_type ffi_type_uint64;
173extern ffi_type ffi_type_sint64;
174extern ffi_type ffi_type_float;
175extern ffi_type ffi_type_double;
176extern ffi_type ffi_type_pointer;
177
178#if @HAVE_LONG_DOUBLE@
179extern ffi_type ffi_type_longdouble;
180#else
181#define ffi_type_longdouble ffi_type_double
182#endif
183#endif /* LIBFFI_HIDE_BASIC_TYPES */
184
185typedef enum {
186  FFI_OK = 0,
187  FFI_BAD_TYPEDEF,
188  FFI_BAD_ABI
189} ffi_status;
190
191typedef unsigned FFI_TYPE;
192
193typedef struct {
194  ffi_abi abi;
195  unsigned nargs;
196  ffi_type **arg_types;
197  ffi_type *rtype;
198  unsigned bytes;
199  unsigned flags;
200#ifdef FFI_EXTRA_CIF_FIELDS
201  FFI_EXTRA_CIF_FIELDS;
202#endif
203} ffi_cif;
204
205/* ---- Definitions for the raw API -------------------------------------- */
206
207#ifndef FFI_SIZEOF_ARG
208# if LONG_MAX == 2147483647
209#  define FFI_SIZEOF_ARG        4
210# elif LONG_MAX == FFI_64_BIT_MAX
211#  define FFI_SIZEOF_ARG        8
212# endif
213#endif
214
215#ifndef FFI_SIZEOF_JAVA_RAW
216#  define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
217#endif
218
219typedef union {
220  ffi_sarg  sint;
221  ffi_arg   uint;
222  float	    flt;
223  char      data[FFI_SIZEOF_ARG];
224  void*     ptr;
225} ffi_raw;
226
227#if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
228/* This is a special case for mips64/n32 ABI (and perhaps others) where
229   sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8.  */
230typedef union {
231  signed int	sint;
232  unsigned int	uint;
233  float		flt;
234  char		data[FFI_SIZEOF_JAVA_RAW];
235  void*		ptr;
236} ffi_java_raw;
237#else
238typedef ffi_raw ffi_java_raw;
239#endif
240
241
242void ffi_raw_call (ffi_cif *cif,
243		   void (*fn)(void),
244		   void *rvalue,
245		   ffi_raw *avalue);
246
247void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
248void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
249size_t ffi_raw_size (ffi_cif *cif);
250
251/* This is analogous to the raw API, except it uses Java parameter	*/
252/* packing, even on 64-bit machines.  I.e. on 64-bit machines		*/
253/* longs and doubles are followed by an empty 64-bit word.		*/
254
255void ffi_java_raw_call (ffi_cif *cif,
256			void (*fn)(void),
257			void *rvalue,
258			ffi_java_raw *avalue);
259
260void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw);
261void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args);
262size_t ffi_java_raw_size (ffi_cif *cif);
263
264/* ---- Definitions for closures ----------------------------------------- */
265
266#if FFI_CLOSURES
267
268#ifdef _MSC_VER
269__declspec(align(8))
270#endif
271typedef struct {
272  char tramp[FFI_TRAMPOLINE_SIZE];
273  ffi_cif   *cif;
274  void     (*fun)(ffi_cif*,void*,void**,void*);
275  void      *user_data;
276#ifdef __GNUC__
277} ffi_closure __attribute__((aligned (8)));
278#else
279} ffi_closure;
280#endif
281
282void *ffi_closure_alloc (size_t size, void **code);
283void ffi_closure_free (void *);
284
285ffi_status
286ffi_prep_closure (ffi_closure*,
287		  ffi_cif *,
288		  void (*fun)(ffi_cif*,void*,void**,void*),
289		  void *user_data);
290
291ffi_status
292ffi_prep_closure_loc (ffi_closure*,
293		      ffi_cif *,
294		      void (*fun)(ffi_cif*,void*,void**,void*),
295		      void *user_data,
296		      void*codeloc);
297
298typedef struct {
299  char tramp[FFI_TRAMPOLINE_SIZE];
300
301  ffi_cif   *cif;
302
303#if !FFI_NATIVE_RAW_API
304
305  /* if this is enabled, then a raw closure has the same layout 
306     as a regular closure.  We use this to install an intermediate 
307     handler to do the transaltion, void** -> ffi_raw*. */
308
309  void     (*translate_args)(ffi_cif*,void*,void**,void*);
310  void      *this_closure;
311
312#endif
313
314  void     (*fun)(ffi_cif*,void*,ffi_raw*,void*);
315  void      *user_data;
316
317} ffi_raw_closure;
318
319typedef struct {
320  char tramp[FFI_TRAMPOLINE_SIZE];
321
322  ffi_cif   *cif;
323
324#if !FFI_NATIVE_RAW_API
325
326  /* if this is enabled, then a raw closure has the same layout 
327     as a regular closure.  We use this to install an intermediate 
328     handler to do the transaltion, void** -> ffi_raw*. */
329
330  void     (*translate_args)(ffi_cif*,void*,void**,void*);
331  void      *this_closure;
332
333#endif
334
335  void     (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
336  void      *user_data;
337
338} ffi_java_raw_closure;
339
340ffi_status
341ffi_prep_raw_closure (ffi_raw_closure*,
342		      ffi_cif *cif,
343		      void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
344		      void *user_data);
345
346ffi_status
347ffi_prep_raw_closure_loc (ffi_raw_closure*,
348			  ffi_cif *cif,
349			  void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
350			  void *user_data,
351			  void *codeloc);
352
353ffi_status
354ffi_prep_java_raw_closure (ffi_java_raw_closure*,
355		           ffi_cif *cif,
356		           void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
357		           void *user_data);
358
359ffi_status
360ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
361			       ffi_cif *cif,
362			       void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
363			       void *user_data,
364			       void *codeloc);
365
366#endif /* FFI_CLOSURES */
367
368/* ---- Public interface definition -------------------------------------- */
369
370ffi_status ffi_prep_cif(ffi_cif *cif,
371			ffi_abi abi,
372			unsigned int nargs,
373			ffi_type *rtype,
374			ffi_type **atypes);
375
376void ffi_call(ffi_cif *cif,
377	      void (*fn)(void),
378	      void *rvalue,
379	      void **avalue);
380
381/* Useful for eliminating compiler warnings */
382#define FFI_FN(f) ((void (*)(void))f)
383
384/* ---- Definitions shared with assembly code ---------------------------- */
385
386#endif
387
388/* If these change, update src/mips/ffitarget.h. */
389#define FFI_TYPE_VOID       0    
390#define FFI_TYPE_INT        1
391#define FFI_TYPE_FLOAT      2    
392#define FFI_TYPE_DOUBLE     3
393#if @HAVE_LONG_DOUBLE@
394#define FFI_TYPE_LONGDOUBLE 4
395#else
396#define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
397#endif
398#define FFI_TYPE_UINT8      5   
399#define FFI_TYPE_SINT8      6
400#define FFI_TYPE_UINT16     7 
401#define FFI_TYPE_SINT16     8
402#define FFI_TYPE_UINT32     9
403#define FFI_TYPE_SINT32     10
404#define FFI_TYPE_UINT64     11
405#define FFI_TYPE_SINT64     12
406#define FFI_TYPE_STRUCT     13
407#define FFI_TYPE_POINTER    14
408
409/* This should always refer to the last type code (for sanity checks) */
410#define FFI_TYPE_LAST       FFI_TYPE_POINTER
411
412#ifdef __cplusplus
413}
414#endif
415
416#endif