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// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef VM_DART_ENTRY_H_
#define VM_DART_ENTRY_H_
#include "vm/allocation.h"
#include "vm/growable_array.h"
namespace dart {
// Forward declarations.
class Array;
class Closure;
class Context;
class Function;
class Instance;
class Integer;
class Library;
class Object;
class RawArray;
class RawInstance;
class RawObject;
class RawString;
class String;
// An arguments descriptor array consists of the total argument count; the
// positional argument count; a sequence of (name, position) pairs, sorted
// by name, for each named optional argument; and a terminating null to
// simplify iterating in generated code.
class ArgumentsDescriptor : public ValueObject {
public:
explicit ArgumentsDescriptor(const Array& array);
// Accessors.
intptr_t Count() const;
intptr_t PositionalCount() const;
intptr_t NamedCount() const { return Count() - PositionalCount(); }
bool MatchesNameAt(intptr_t i, const String& other) const;
// Generated code support.
static intptr_t count_offset();
static intptr_t positional_count_offset();
static intptr_t first_named_entry_offset();
static intptr_t name_offset() { return kNameOffset * kWordSize; }
static intptr_t position_offset() { return kPositionOffset * kWordSize; }
static intptr_t named_entry_size() { return kNamedEntrySize * kWordSize; }
// Allocate and return an arguments descriptor. The first
// (count - optional_arguments_names.Length()) arguments are
// positional and the remaining ones are named optional arguments.
static RawArray* New(intptr_t count,
const Array& optional_arguments_names);
private:
// Absolute indexes into the array.
enum {
kCountIndex,
kPositionalCountIndex,
kFirstNamedEntryIndex,
};
// Relative indexes into each named argument entry.
enum {
kNameOffset,
kPositionOffset,
kNamedEntrySize,
};
static intptr_t LengthFor(intptr_t count) {
// Add 1 for the terminating null.
return kFirstNamedEntryIndex + (kNamedEntrySize * count) + 1;
}
const Array& array_;
DISALLOW_COPY_AND_ASSIGN(ArgumentsDescriptor);
};
// DartEntry abstracts functionality needed to resolve dart functions
// and invoke them from C++.
class DartEntry : public AllStatic {
public:
// On success, returns a RawInstance. On failure, a RawError.
typedef RawObject* (*invokestub)(uword entry_point,
const Array& arguments_descriptor,
const Object** arguments,
const Context& context);
// Invokes the specified instance function on the receiver.
// On success, returns a RawInstance. On failure, a RawError.
static RawObject* InvokeDynamic(
const Instance& receiver,
const Function& function,
const GrowableArray<const Object*>& arguments,
const Array& optional_arguments_names);
// Invoke the specified static function.
// On success, returns a RawInstance. On failure, a RawError.
static RawObject* InvokeStatic(
const Function& function,
const GrowableArray<const Object*>& arguments,
const Array& optional_arguments_names);
// Invoke the specified closure object.
// On success, returns a RawInstance. On failure, a RawError.
static RawObject* InvokeClosure(
const Instance& closure,
const GrowableArray<const Object*>& arguments,
const Array& optional_arguments_names);
};
// Utility functions to call from VM into Dart bootstrap libraries.
// Each may return an exception object.
class DartLibraryCalls : public AllStatic {
public:
// On success, returns a RawInstance. On failure, a RawError.
static RawObject* ExceptionCreate(
const Library& library,
const String& exception_name,
const GrowableArray<const Object*>& arguments);
// On success, returns a RawInstance. On failure, a RawError.
static RawObject* ToString(const Instance& receiver);
// On success, returns a RawInstance. On failure, a RawError.
static RawObject* Equals(const Instance& left, const Instance& right);
// Returns null on success, a RawError on failure.
static RawObject* HandleMessage(Dart_Port dest_port_id,
Dart_Port reply_port_id,
const Instance& dart_message);
// On success returns new SendPort, on failure returns a RawError.
static RawObject* NewSendPort(intptr_t port_id);
// map[key] = value;
//
// Returns null on success, a RawError on failure.
static RawObject* MapSetAt(const Instance& map,
const Instance& key,
const Instance& value);
// Gets the _id field of a SendPort/ReceivePort.
//
// Returns the value of _id on success, a RawError on failure.
static RawObject* PortGetId(const Instance& port);
};
} // namespace dart
#endif // VM_DART_ENTRY_H_