rf-web/vendor/bundle/gems/ffi-1.11.1/ext/ffi_c/FunctionInfo.c
2019-10-21 10:18:17 +02:00

272 lines
9.0 KiB
C

/*
* Copyright (c) 2009, Wayne Meissner
* Copyright (C) 2009 Andrea Fazzi <andrea.fazzi@alcacoop.it>
* Copyright (c) 2008-2013, Ruby FFI project contributors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Ruby FFI project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MSC_VER
# include <sys/param.h>
#endif
#include <sys/types.h>
#include <stdio.h>
#ifndef _MSC_VER
# include <stdint.h>
# include <stdbool.h>
#else
# include "win32/stdbool.h"
#endif
#include <errno.h>
#include <ruby.h>
#include <ffi.h>
#include "rbffi.h"
#include "compat.h"
#include "AbstractMemory.h"
#include "Types.h"
#include "Type.h"
#include "StructByValue.h"
#include "Function.h"
static VALUE fntype_allocate(VALUE klass);
static VALUE fntype_initialize(int argc, VALUE* argv, VALUE self);
static void fntype_mark(FunctionType*);
static void fntype_free(FunctionType *);
VALUE rbffi_FunctionTypeClass = Qnil;
static VALUE
fntype_allocate(VALUE klass)
{
FunctionType* fnInfo;
VALUE obj = Data_Make_Struct(klass, FunctionType, fntype_mark, fntype_free, fnInfo);
fnInfo->type.ffiType = &ffi_type_pointer;
fnInfo->type.nativeType = NATIVE_FUNCTION;
fnInfo->rbReturnType = Qnil;
fnInfo->rbParameterTypes = Qnil;
fnInfo->rbEnums = Qnil;
fnInfo->invoke = rbffi_CallFunction;
fnInfo->closurePool = NULL;
return obj;
}
static void
fntype_mark(FunctionType* fnInfo)
{
rb_gc_mark(fnInfo->rbReturnType);
rb_gc_mark(fnInfo->rbParameterTypes);
rb_gc_mark(fnInfo->rbEnums);
if (fnInfo->callbackCount > 0 && fnInfo->callbackParameters != NULL) {
rb_gc_mark_locations(&fnInfo->callbackParameters[0], &fnInfo->callbackParameters[fnInfo->callbackCount]);
}
}
static void
fntype_free(FunctionType* fnInfo)
{
xfree(fnInfo->parameterTypes);
xfree(fnInfo->ffiParameterTypes);
xfree(fnInfo->nativeParameterTypes);
xfree(fnInfo->callbackParameters);
if (fnInfo->closurePool != NULL) {
rbffi_ClosurePool_Free(fnInfo->closurePool);
}
xfree(fnInfo);
}
/*
* call-seq: initialize(return_type, param_types, options={})
* @param [Type, Symbol] return_type return type for the function
* @param [Array<Type, Symbol>] param_types array of parameters types
* @param [Hash] options
* @option options [Boolean] :blocking set to true if the C function is a blocking call
* @option options [Symbol] :convention calling convention see {FFI::Library#calling_convention}
* @option options [FFI::Enums] :enums
* @return [self]
* A new FunctionType instance.
*/
static VALUE
fntype_initialize(int argc, VALUE* argv, VALUE self)
{
FunctionType *fnInfo;
ffi_status status;
VALUE rbReturnType = Qnil, rbParamTypes = Qnil, rbOptions = Qnil;
VALUE rbEnums = Qnil, rbConvention = Qnil, rbBlocking = Qnil;
#if defined(X86_WIN32)
VALUE rbConventionStr;
#endif
int i, nargs;
nargs = rb_scan_args(argc, argv, "21", &rbReturnType, &rbParamTypes, &rbOptions);
if (nargs >= 3 && rbOptions != Qnil) {
rbConvention = rb_hash_aref(rbOptions, ID2SYM(rb_intern("convention")));
rbEnums = rb_hash_aref(rbOptions, ID2SYM(rb_intern("enums")));
rbBlocking = rb_hash_aref(rbOptions, ID2SYM(rb_intern("blocking")));
}
Check_Type(rbParamTypes, T_ARRAY);
Data_Get_Struct(self, FunctionType, fnInfo);
fnInfo->parameterCount = (int) RARRAY_LEN(rbParamTypes);
fnInfo->parameterTypes = xcalloc(fnInfo->parameterCount, sizeof(*fnInfo->parameterTypes));
fnInfo->ffiParameterTypes = xcalloc(fnInfo->parameterCount, sizeof(ffi_type *));
fnInfo->nativeParameterTypes = xcalloc(fnInfo->parameterCount, sizeof(*fnInfo->nativeParameterTypes));
fnInfo->rbParameterTypes = rb_ary_new2(fnInfo->parameterCount);
fnInfo->rbEnums = rbEnums;
fnInfo->blocking = RTEST(rbBlocking);
fnInfo->hasStruct = false;
for (i = 0; i < fnInfo->parameterCount; ++i) {
VALUE entry = rb_ary_entry(rbParamTypes, i);
VALUE type = rbffi_Type_Lookup(entry);
if (!RTEST(type)) {
VALUE typeName = rb_funcall2(entry, rb_intern("inspect"), 0, NULL);
rb_raise(rb_eTypeError, "Invalid parameter type (%s)", RSTRING_PTR(typeName));
}
if (rb_obj_is_kind_of(type, rbffi_FunctionTypeClass)) {
REALLOC_N(fnInfo->callbackParameters, VALUE, fnInfo->callbackCount + 1);
fnInfo->callbackParameters[fnInfo->callbackCount++] = type;
}
if (rb_obj_is_kind_of(type, rbffi_StructByValueClass)) {
fnInfo->hasStruct = true;
}
rb_ary_push(fnInfo->rbParameterTypes, type);
Data_Get_Struct(type, Type, fnInfo->parameterTypes[i]);
fnInfo->ffiParameterTypes[i] = fnInfo->parameterTypes[i]->ffiType;
fnInfo->nativeParameterTypes[i] = fnInfo->parameterTypes[i]->nativeType;
}
fnInfo->rbReturnType = rbffi_Type_Lookup(rbReturnType);
if (!RTEST(fnInfo->rbReturnType)) {
VALUE typeName = rb_funcall2(rbReturnType, rb_intern("inspect"), 0, NULL);
rb_raise(rb_eTypeError, "Invalid return type (%s)", RSTRING_PTR(typeName));
}
if (rb_obj_is_kind_of(fnInfo->rbReturnType, rbffi_StructByValueClass)) {
fnInfo->hasStruct = true;
}
Data_Get_Struct(fnInfo->rbReturnType, Type, fnInfo->returnType);
fnInfo->ffiReturnType = fnInfo->returnType->ffiType;
#if defined(X86_WIN32)
rbConventionStr = (rbConvention != Qnil) ? rb_funcall2(rbConvention, rb_intern("to_s"), 0, NULL) : Qnil;
fnInfo->abi = (rbConventionStr != Qnil && strcmp(StringValueCStr(rbConventionStr), "stdcall") == 0)
? FFI_STDCALL : FFI_DEFAULT_ABI;
#else
fnInfo->abi = FFI_DEFAULT_ABI;
#endif
status = ffi_prep_cif(&fnInfo->ffi_cif, fnInfo->abi, fnInfo->parameterCount,
fnInfo->ffiReturnType, fnInfo->ffiParameterTypes);
switch (status) {
case FFI_BAD_ABI:
rb_raise(rb_eArgError, "Invalid ABI specified");
case FFI_BAD_TYPEDEF:
rb_raise(rb_eArgError, "Invalid argument type specified");
case FFI_OK:
break;
default:
rb_raise(rb_eArgError, "Unknown FFI error");
}
fnInfo->invoke = rbffi_GetInvoker(fnInfo);
return self;
}
/*
* call-seq: result_type
* @return [Type]
* Get the return type of the function type
*/
static VALUE
fntype_result_type(VALUE self)
{
FunctionType* ft;
Data_Get_Struct(self, FunctionType, ft);
return ft->rbReturnType;
}
/*
* call-seq: param_types
* @return [Array<Type>]
* Get parameters types.
*/
static VALUE
fntype_param_types(VALUE self)
{
FunctionType* ft;
Data_Get_Struct(self, FunctionType, ft);
return rb_ary_dup(ft->rbParameterTypes);
}
void
rbffi_FunctionInfo_Init(VALUE moduleFFI)
{
VALUE ffi_Type;
ffi_Type = rbffi_TypeClass;
/*
* Document-class: FFI::FunctionType < FFI::Type
*/
rbffi_FunctionTypeClass = rb_define_class_under(moduleFFI, "FunctionType",ffi_Type);
rb_global_variable(&rbffi_FunctionTypeClass);
/*
* Document-const: FFI::CallbackInfo = FFI::FunctionType
*/
rb_define_const(moduleFFI, "CallbackInfo", rbffi_FunctionTypeClass);
/*
* Document-const: FFI::FunctionInfo = FFI::FunctionType
*/
rb_define_const(moduleFFI, "FunctionInfo", rbffi_FunctionTypeClass);
/*
* Document-const: FFI::Type::Function = FFI::FunctionType
*/
rb_define_const(ffi_Type, "Function", rbffi_FunctionTypeClass);
rb_define_alloc_func(rbffi_FunctionTypeClass, fntype_allocate);
rb_define_method(rbffi_FunctionTypeClass, "initialize", fntype_initialize, -1);
rb_define_method(rbffi_FunctionTypeClass, "result_type", fntype_result_type, 0);
rb_define_method(rbffi_FunctionTypeClass, "param_types", fntype_param_types, 0);
}