| /* -----------------------------------------------------------------*-C-*- |
| libffi 2.00-beta - Copyright (c) 1996-2003 Red Hat, Inc. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| ``Software''), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be included |
| in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| IN NO EVENT SHALL CYGNUS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| OTHER DEALINGS IN THE SOFTWARE. |
| |
| ----------------------------------------------------------------------- */ |
| |
| /* ------------------------------------------------------------------- |
| The basic API is described in the README file. |
| |
| The raw API is designed to bypass some of the argument packing |
| and unpacking on architectures for which it can be avoided. |
| |
| The closure API allows interpreted functions to be packaged up |
| inside a C function pointer, so that they can be called as C functions, |
| with no understanding on the client side that they are interpreted. |
| It can also be used in other cases in which it is necessary to package |
| up a user specified parameter and a function pointer as a single |
| function pointer. |
| |
| The closure API must be implemented in order to get its functionality, |
| e.g. for use by gij. Routines are provided to emulate the raw API |
| if the underlying platform doesn't allow faster implementation. |
| |
| More details on the raw and cloure API can be found in: |
| |
| http://gcc.gnu.org/ml/java/1999-q3/msg00138.html |
| |
| and |
| |
| http://gcc.gnu.org/ml/java/1999-q3/msg00174.html |
| -------------------------------------------------------------------- */ |
| |
| #ifndef LIBFFI_H |
| #define LIBFFI_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* Specify which architecture libffi is configured for. */ |
| //XXX #define X86 |
| |
| /* ---- System configuration information --------------------------------- */ |
| |
| #include <ffitarget.h> |
| |
| #ifndef LIBFFI_ASM |
| |
| #include <stddef.h> |
| #include <limits.h> |
| |
| /* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example). |
| But we can find it either under the correct ANSI name, or under GNU |
| C's internal name. */ |
| #ifdef LONG_LONG_MAX |
| # define FFI_LONG_LONG_MAX LONG_LONG_MAX |
| #else |
| # ifdef LLONG_MAX |
| # define FFI_LONG_LONG_MAX LLONG_MAX |
| # else |
| # ifdef __GNUC__ |
| # define FFI_LONG_LONG_MAX __LONG_LONG_MAX__ |
| # endif |
| # ifdef _MSC_VER |
| # define FFI_LONG_LONG_MAX _I64_MAX |
| # endif |
| # endif |
| #endif |
| |
| #if SCHAR_MAX == 127 |
| # define ffi_type_uchar ffi_type_uint8 |
| # define ffi_type_schar ffi_type_sint8 |
| #else |
| #error "char size not supported" |
| #endif |
| |
| #if SHRT_MAX == 32767 |
| # define ffi_type_ushort ffi_type_uint16 |
| # define ffi_type_sshort ffi_type_sint16 |
| #elif SHRT_MAX == 2147483647 |
| # define ffi_type_ushort ffi_type_uint32 |
| # define ffi_type_sshort ffi_type_sint32 |
| #else |
| #error "short size not supported" |
| #endif |
| |
| #if INT_MAX == 32767 |
| # define ffi_type_uint ffi_type_uint16 |
| # define ffi_type_sint ffi_type_sint16 |
| #elif INT_MAX == 2147483647 |
| # define ffi_type_uint ffi_type_uint32 |
| # define ffi_type_sint ffi_type_sint32 |
| #elif INT_MAX == 9223372036854775807 |
| # define ffi_type_uint ffi_type_uint64 |
| # define ffi_type_sint ffi_type_sint64 |
| #else |
| #error "int size not supported" |
| #endif |
| |
| #define ffi_type_ulong ffi_type_uint64 |
| #define ffi_type_slong ffi_type_sint64 |
| #if LONG_MAX == 2147483647 |
| # if FFI_LONG_LONG_MAX != 9223372036854775807 |
| #error "no 64-bit data type supported" |
| # endif |
| #elif LONG_MAX != 9223372036854775807 |
| #error "long size not supported" |
| #endif |
| |
| /* The closure code assumes that this works on pointers, i.e. a size_t */ |
| /* can hold a pointer. */ |
| |
| typedef struct _ffi_type |
| { |
| size_t size; |
| unsigned short alignment; |
| unsigned short type; |
| /*@null@*/ struct _ffi_type **elements; |
| } ffi_type; |
| |
| /* These are defined in types.c */ |
| extern ffi_type ffi_type_void; |
| extern ffi_type ffi_type_uint8; |
| extern ffi_type ffi_type_sint8; |
| extern ffi_type ffi_type_uint16; |
| extern ffi_type ffi_type_sint16; |
| extern ffi_type ffi_type_uint32; |
| extern ffi_type ffi_type_sint32; |
| extern ffi_type ffi_type_uint64; |
| extern ffi_type ffi_type_sint64; |
| extern ffi_type ffi_type_float; |
| extern ffi_type ffi_type_double; |
| extern ffi_type ffi_type_longdouble; |
| extern ffi_type ffi_type_pointer; |
| |
| |
| typedef enum { |
| FFI_OK = 0, |
| FFI_BAD_TYPEDEF, |
| FFI_BAD_ABI |
| } ffi_status; |
| |
| typedef unsigned FFI_TYPE; |
| |
| typedef struct { |
| ffi_abi abi; |
| unsigned nargs; |
| /*@dependent@*/ ffi_type **arg_types; |
| /*@dependent@*/ ffi_type *rtype; |
| unsigned bytes; |
| unsigned flags; |
| #ifdef FFI_EXTRA_CIF_FIELDS |
| FFI_EXTRA_CIF_FIELDS; |
| #endif |
| } ffi_cif; |
| |
| /* ---- Definitions for the raw API -------------------------------------- */ |
| |
| #ifdef _WIN64 |
| #define FFI_SIZEOF_ARG 8 |
| #else |
| #define FFI_SIZEOF_ARG 4 |
| #endif |
| |
| typedef union { |
| ffi_sarg sint; |
| ffi_arg uint; |
| float flt; |
| char data[FFI_SIZEOF_ARG]; |
| void* ptr; |
| } ffi_raw; |
| |
| void ffi_raw_call (/*@dependent@*/ ffi_cif *cif, |
| void (*fn)(), |
| /*@out@*/ void *rvalue, |
| /*@dependent@*/ ffi_raw *avalue); |
| |
| void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw); |
| void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args); |
| size_t ffi_raw_size (ffi_cif *cif); |
| |
| /* This is analogous to the raw API, except it uses Java parameter */ |
| /* packing, even on 64-bit machines. I.e. on 64-bit machines */ |
| /* longs and doubles are followed by an empty 64-bit word. */ |
| |
| void ffi_java_raw_call (/*@dependent@*/ ffi_cif *cif, |
| void (*fn)(), |
| /*@out@*/ void *rvalue, |
| /*@dependent@*/ ffi_raw *avalue); |
| |
| void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw); |
| void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args); |
| size_t ffi_java_raw_size (ffi_cif *cif); |
| |
| /* ---- Definitions for closures ----------------------------------------- */ |
| |
| #if FFI_CLOSURES |
| |
| typedef struct { |
| char tramp[FFI_TRAMPOLINE_SIZE]; |
| ffi_cif *cif; |
| void (*fun)(ffi_cif*,void*,void**,void*); |
| void *user_data; |
| } ffi_closure; |
| |
| void ffi_closure_free(void *); |
| void *ffi_closure_alloc (size_t size, void **code); |
| |
| ffi_status |
| ffi_prep_closure_loc (ffi_closure*, |
| ffi_cif *, |
| void (*fun)(ffi_cif*,void*,void**,void*), |
| void *user_data, |
| void *codeloc); |
| |
| typedef struct { |
| char tramp[FFI_TRAMPOLINE_SIZE]; |
| |
| ffi_cif *cif; |
| |
| #if !FFI_NATIVE_RAW_API |
| |
| /* if this is enabled, then a raw closure has the same layout |
| as a regular closure. We use this to install an intermediate |
| handler to do the transaltion, void** -> ffi_raw*. */ |
| |
| void (*translate_args)(ffi_cif*,void*,void**,void*); |
| void *this_closure; |
| |
| #endif |
| |
| void (*fun)(ffi_cif*,void*,ffi_raw*,void*); |
| void *user_data; |
| |
| } ffi_raw_closure; |
| |
| ffi_status |
| ffi_prep_raw_closure (ffi_raw_closure*, |
| ffi_cif *cif, |
| void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
| void *user_data); |
| |
| ffi_status |
| ffi_prep_java_raw_closure (ffi_raw_closure*, |
| ffi_cif *cif, |
| void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
| void *user_data); |
| |
| #endif /* FFI_CLOSURES */ |
| |
| /* ---- Public interface definition -------------------------------------- */ |
| |
| ffi_status ffi_prep_cif(/*@out@*/ /*@partial@*/ ffi_cif *cif, |
| ffi_abi abi, |
| unsigned int nargs, |
| /*@dependent@*/ /*@out@*/ /*@partial@*/ ffi_type *rtype, |
| /*@dependent@*/ ffi_type **atypes); |
| |
| int |
| ffi_call(/*@dependent@*/ ffi_cif *cif, |
| void (*fn)(), |
| /*@out@*/ void *rvalue, |
| /*@dependent@*/ void **avalue); |
| |
| /* Useful for eliminating compiler warnings */ |
| #define FFI_FN(f) ((void (*)())f) |
| |
| /* ---- Definitions shared with assembly code ---------------------------- */ |
| |
| #endif |
| |
| /* If these change, update src/mips/ffitarget.h. */ |
| #define FFI_TYPE_VOID 0 |
| #define FFI_TYPE_INT 1 |
| #define FFI_TYPE_FLOAT 2 |
| #define FFI_TYPE_DOUBLE 3 |
| #if 1 |
| #define FFI_TYPE_LONGDOUBLE 4 |
| #else |
| #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE |
| #endif |
| #define FFI_TYPE_UINT8 5 |
| #define FFI_TYPE_SINT8 6 |
| #define FFI_TYPE_UINT16 7 |
| #define FFI_TYPE_SINT16 8 |
| #define FFI_TYPE_UINT32 9 |
| #define FFI_TYPE_SINT32 10 |
| #define FFI_TYPE_UINT64 11 |
| #define FFI_TYPE_SINT64 12 |
| #define FFI_TYPE_STRUCT 13 |
| #define FFI_TYPE_POINTER 14 |
| |
| /* This should always refer to the last type code (for sanity checks) */ |
| #define FFI_TYPE_LAST FFI_TYPE_POINTER |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
| |