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307388ea19
* Add a "pinning" reference A `Fiddle::Pinned` objects will prevent the objects they point to from moving. This is useful in the case where you need to pass a reference to a C extension that keeps the address in a global and needs the address to be stable. For example: ```ruby class Foo A = "hi" # this is an embedded string some_c_function A # A might move! end ``` If `A` moves, then the underlying string buffer may also move. `Fiddle::Pinned` will prevent the object from moving: ```ruby class Foo A = "hi" # this is an embedded string A_pinner = Fiddle::Pinned.new(A) # :nodoc: some_c_function A # A can't move because of `Fiddle::Pinned` end ``` This is a similar strategy to what Graal uses: https://www.graalvm.org/sdk/javadoc/org/graalvm/nativeimage/PinnedObject.html#getObject-- * rename global to match exception name * Introduce generic Fiddle::Error and rearrange error classes Fiddle::Error is the generic exception base class for Fiddle exceptions. This commit introduces the class and rearranges Fiddle exceptions to inherit from it. https://github.com/ruby/fiddle/commit/ac52d00223
172 lines
4 KiB
C
172 lines
4 KiB
C
#ifndef FIDDLE_H
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#define FIDDLE_H
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#include <ruby.h>
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#include <errno.h>
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#if defined(_WIN32)
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#include <windows.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#if defined(HAVE_DLFCN_H)
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# include <dlfcn.h>
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# /* some stranger systems may not define all of these */
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#ifndef RTLD_LAZY
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#define RTLD_LAZY 0
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#endif
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#ifndef RTLD_GLOBAL
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#define RTLD_GLOBAL 0
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#endif
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#ifndef RTLD_NOW
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#define RTLD_NOW 0
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#endif
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#else
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# if defined(_WIN32)
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# include <windows.h>
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# define dlopen(name,flag) ((void*)LoadLibrary(name))
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# define dlerror() strerror(rb_w32_map_errno(GetLastError()))
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# define dlsym(handle,name) ((void*)GetProcAddress((handle),(name)))
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# define RTLD_LAZY -1
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# define RTLD_NOW -1
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# define RTLD_GLOBAL -1
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# endif
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#endif
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#ifdef USE_HEADER_HACKS
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#include <ffi/ffi.h>
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#else
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#include <ffi.h>
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#endif
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#undef ffi_type_uchar
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#undef ffi_type_schar
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#undef ffi_type_ushort
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#undef ffi_type_sshort
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#undef ffi_type_uint
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#undef ffi_type_sint
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#undef ffi_type_ulong
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#undef ffi_type_slong
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#if CHAR_BIT == 8
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# define ffi_type_uchar ffi_type_uint8
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# define ffi_type_schar ffi_type_sint8
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#else
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# error "CHAR_BIT not supported"
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#endif
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# if SIZEOF_SHORT == 2
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# define ffi_type_ushort ffi_type_uint16
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# define ffi_type_sshort ffi_type_sint16
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# elif SIZEOF_SHORT == 4
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# define ffi_type_ushort ffi_type_uint32
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# define ffi_type_sshort ffi_type_sint32
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# else
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# error "short size not supported"
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# endif
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# if SIZEOF_INT == 2
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# define ffi_type_uint ffi_type_uint16
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# define ffi_type_sint ffi_type_sint16
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# elif SIZEOF_INT == 4
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# define ffi_type_uint ffi_type_uint32
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# define ffi_type_sint ffi_type_sint32
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# elif SIZEOF_INT == 8
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# define ffi_type_uint ffi_type_uint64
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# define ffi_type_sint ffi_type_sint64
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# else
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# error "int size not supported"
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# endif
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# if SIZEOF_LONG == 4
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# define ffi_type_ulong ffi_type_uint32
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# define ffi_type_slong ffi_type_sint32
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# elif SIZEOF_LONG == 8
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# define ffi_type_ulong ffi_type_uint64
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# define ffi_type_slong ffi_type_sint64
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# else
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# error "long size not supported"
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# endif
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#if HAVE_LONG_LONG
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# if SIZEOF_LONG_LONG == 8
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# define ffi_type_slong_long ffi_type_sint64
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# define ffi_type_ulong_long ffi_type_uint64
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# else
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# error "long long size not supported"
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# endif
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#endif
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#include <closure.h>
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#include <conversions.h>
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#include <function.h>
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#define TYPE_VOID 0
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#define TYPE_VOIDP 1
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#define TYPE_CHAR 2
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#define TYPE_SHORT 3
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#define TYPE_INT 4
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#define TYPE_LONG 5
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#if HAVE_LONG_LONG
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#define TYPE_LONG_LONG 6
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#endif
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#define TYPE_FLOAT 7
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#define TYPE_DOUBLE 8
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#define TYPE_VARIADIC 9
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#define TYPE_CONST_STRING 10
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#ifndef TYPE_SSIZE_T
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# if SIZEOF_SIZE_T == SIZEOF_INT
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# define TYPE_SSIZE_T TYPE_INT
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# elif SIZEOF_SIZE_T == SIZEOF_LONG
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# define TYPE_SSIZE_T TYPE_LONG
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# elif defined HAVE_LONG_LONG && SIZEOF_SIZE_T == SIZEOF_LONG_LONG
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# define TYPE_SSIZE_T TYPE_LONG_LONG
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# endif
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#endif
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#define TYPE_SIZE_T (-1*SIGNEDNESS_OF_SIZE_T*TYPE_SSIZE_T)
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#ifndef TYPE_PTRDIFF_T
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# if SIZEOF_PTRDIFF_T == SIZEOF_INT
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# define TYPE_PTRDIFF_T TYPE_INT
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# elif SIZEOF_PTRDIFF_T == SIZEOF_LONG
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# define TYPE_PTRDIFF_T TYPE_LONG
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# elif defined HAVE_LONG_LONG && SIZEOF_PTRDIFF_T == SIZEOF_LONG_LONG
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# define TYPE_PTRDIFF_T TYPE_LONG_LONG
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# endif
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#endif
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#ifndef TYPE_INTPTR_T
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# if SIZEOF_INTPTR_T == SIZEOF_INT
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# define TYPE_INTPTR_T TYPE_INT
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# elif SIZEOF_INTPTR_T == SIZEOF_LONG
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# define TYPE_INTPTR_T TYPE_LONG
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# elif defined HAVE_LONG_LONG && SIZEOF_INTPTR_T == SIZEOF_LONG_LONG
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# define TYPE_INTPTR_T TYPE_LONG_LONG
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# endif
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#endif
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#define TYPE_UINTPTR_T (-TYPE_INTPTR_T)
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#define ALIGN_OF(type) offsetof(struct {char align_c; type align_x;}, align_x)
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#define ALIGN_VOIDP ALIGN_OF(void*)
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#define ALIGN_SHORT ALIGN_OF(short)
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#define ALIGN_CHAR ALIGN_OF(char)
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#define ALIGN_INT ALIGN_OF(int)
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#define ALIGN_LONG ALIGN_OF(long)
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#if HAVE_LONG_LONG
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#define ALIGN_LONG_LONG ALIGN_OF(LONG_LONG)
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#endif
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#define ALIGN_FLOAT ALIGN_OF(float)
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#define ALIGN_DOUBLE ALIGN_OF(double)
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extern VALUE mFiddle;
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extern VALUE rb_eFiddleDLError;
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VALUE rb_fiddle_new_function(VALUE address, VALUE arg_types, VALUE ret_type);
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#endif
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/* vim: set noet sws=4 sw=4: */
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