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#include <sys/param.h>
#include <sys/types.h>
#ifndef _WIN32
# include <sys/mman.h>
#endif
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <errno.h>
#include <ruby.h>
#if defined(HAVE_NATIVETHREAD) && !defined(_WIN32) && !defined(__WIN32__)
# include <pthread.h>
#endif
#include <ffi.h>
#include "rbffi.h"
#include "compat.h"
#include "AbstractMemory.h"
#include "Types.h"
#include "Type.h"
#include "Function.h"
static void fninfo_mark(FunctionInfo*);
static void fninfo_free(FunctionInfo *);
VALUE rbffi_FunctionInfoClass = Qnil;
static VALUE
fninfo_allocate(VALUE klass)
{
FunctionInfo* fnInfo;
VALUE obj = Data_Make_Struct(klass, FunctionInfo, fninfo_mark, fninfo_free, fnInfo);
fnInfo->type.ffiType = &ffi_type_pointer;
fnInfo->type.size = ffi_type_pointer.size;
fnInfo->type.alignment = ffi_type_pointer.alignment;
fnInfo->type.nativeType = NATIVE_FUNCTION;
fnInfo->rbReturnType = Qnil;
fnInfo->rbParameterTypes = Qnil;
fnInfo->rbEnums = Qnil;
return obj;
}
static void
fninfo_mark(FunctionInfo* 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
fninfo_free(FunctionInfo* fnInfo)
{
if (fnInfo->parameterTypes != NULL) {
xfree(fnInfo->parameterTypes);
}
if (fnInfo->ffiParameterTypes != NULL) {
xfree(fnInfo->ffiParameterTypes);
}
if (fnInfo->nativeParameterTypes != NULL) {
xfree(fnInfo->nativeParameterTypes);
}
if (fnInfo->callbackParameters != NULL) {
xfree(fnInfo->callbackParameters);
}
xfree(fnInfo);
}
static VALUE
fninfo_initialize(int argc, VALUE* argv, VALUE self)
{
FunctionInfo *fnInfo;
ffi_status status;
VALUE rbReturnType = Qnil, rbParamTypes = Qnil, rbOptions = Qnil;
VALUE rbEnums = Qnil, rbConvention = Qnil;
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")));
}
Check_Type(rbParamTypes, T_ARRAY);
Data_Get_Struct(self, FunctionInfo, fnInfo);
fnInfo->parameterCount = 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;
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_FunctionInfoClass)) {
REALLOC_N(fnInfo->callbackParameters, VALUE, fnInfo->callbackCount + 1);
fnInfo->callbackParameters[fnInfo->callbackCount++] = type;
}
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));
}
Data_Get_Struct(fnInfo->rbReturnType, Type, fnInfo->returnType);
fnInfo->ffiReturnType = fnInfo->returnType->ffiType;
#if defined(_WIN32) || defined(__WIN32__)
fnInfo->abi = (rbConvention != Qnil && strcmp(StringValueCStr(rbConvention), "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");
}
return self;
}
void
rbffi_FunctionInfo_Init(VALUE moduleFFI)
{
rbffi_FunctionInfoClass = rb_define_class_under(moduleFFI, "FunctionInfo", rbffi_TypeClass);
rb_global_variable(&rbffi_FunctionInfoClass);
rb_define_const(moduleFFI, "CallbackInfo", rbffi_FunctionInfoClass);
rb_define_alloc_func(rbffi_FunctionInfoClass, fninfo_allocate);
rb_define_method(rbffi_FunctionInfoClass, "initialize", fninfo_initialize, -1);
}
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