mirror of
https://github.com/dart-lang/sdk
synced 2024-09-05 00:13:50 +00:00
![Matthew Dempsky](/assets/img/avatar_default.png)
Message is a C++ type with a simple ownership model appropriate for std::unique_ptr. This CL applies the following changes: 1. All uses of "new Message(...)" are replaced with "Message::New(...)", which is effectively "std::make_unique<Message>(...)". (The latter was only added in C++14, but Dart still compiles in C++11 mode.) 2. All owning Message* are replaced with std::unique_ptr<Message>. The notable exception is MessageQueue, which still uses raw Message* internally to simplify the linked list handling. 3. All "delete message;" statements are removed. 4. Uses of "NULL" replaced with "nullptr" as necessary. Change-Id: I05b5804289f2a225bfa05d3c1631129358fed373 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/101222 Reviewed-by: Vyacheslav Egorov <vegorov@google.com> Commit-Queue: Matthew Dempsky <mdempsky@google.com>
110 lines
3 KiB
C++
110 lines
3 KiB
C++
// 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 RUNTIME_VM_PORT_H_
|
|
#define RUNTIME_VM_PORT_H_
|
|
|
|
#include <memory>
|
|
|
|
#include "include/dart_api.h"
|
|
#include "vm/allocation.h"
|
|
#include "vm/globals.h"
|
|
#include "vm/json_stream.h"
|
|
#include "vm/random.h"
|
|
|
|
namespace dart {
|
|
|
|
class Isolate;
|
|
class Message;
|
|
class MessageHandler;
|
|
class Mutex;
|
|
class PortMapTestPeer;
|
|
|
|
class PortMap : public AllStatic {
|
|
public:
|
|
enum PortState {
|
|
kNewPort = 0, // a newly allocated port
|
|
kLivePort = 1, // a regular port (has a ReceivePort)
|
|
kControlPort = 2, // a special control port (has a ReceivePort)
|
|
};
|
|
|
|
// Allocate a port for the provided handler and return its VM-global id.
|
|
static Dart_Port CreatePort(MessageHandler* handler);
|
|
|
|
// Indicates that a port has had a ReceivePort created for it at the
|
|
// dart language level. The port remains live until it is closed.
|
|
static void SetPortState(Dart_Port id, PortState kind);
|
|
|
|
// Close the port with id. All pending messages will be dropped.
|
|
//
|
|
// Returns true if the port is successfully closed.
|
|
static bool ClosePort(Dart_Port id);
|
|
|
|
// Close all the ports for the provided handler.
|
|
static void ClosePorts(MessageHandler* handler);
|
|
|
|
// Enqueues the message in the port with id. Returns false if the port is not
|
|
// active any longer.
|
|
//
|
|
// Claims ownership of 'message'.
|
|
static bool PostMessage(std::unique_ptr<Message> message,
|
|
bool before_events = false);
|
|
|
|
// Returns whether a port is local to the current isolate.
|
|
static bool IsLocalPort(Dart_Port id);
|
|
|
|
// Returns the owning Isolate for port 'id'.
|
|
static Isolate* GetIsolate(Dart_Port id);
|
|
|
|
static void Init();
|
|
static void Cleanup();
|
|
|
|
static void PrintPortsForMessageHandler(MessageHandler* handler,
|
|
JSONStream* stream);
|
|
|
|
static void DebugDumpForMessageHandler(MessageHandler* handler);
|
|
|
|
private:
|
|
friend class dart::PortMapTestPeer;
|
|
|
|
// Mapping between port numbers and handlers.
|
|
//
|
|
// Free entries have id == 0 and handler == NULL. Deleted entries
|
|
// have id == 0 and handler == deleted_entry_.
|
|
typedef struct {
|
|
Dart_Port port;
|
|
MessageHandler* handler;
|
|
PortState state;
|
|
} Entry;
|
|
|
|
static const char* PortStateString(PortState state);
|
|
|
|
// Allocate a new unique port.
|
|
static Dart_Port AllocatePort();
|
|
|
|
static bool IsActivePort(Dart_Port id);
|
|
static bool IsLivePort(Dart_Port id);
|
|
|
|
static intptr_t FindPort(Dart_Port port);
|
|
static void Rehash(intptr_t new_capacity);
|
|
|
|
static void MaintainInvariants();
|
|
|
|
// Lock protecting access to the port map.
|
|
static Mutex* mutex_;
|
|
|
|
// Hashmap of ports.
|
|
static Entry* map_;
|
|
static MessageHandler* deleted_entry_;
|
|
static intptr_t capacity_;
|
|
static intptr_t used_;
|
|
static intptr_t deleted_;
|
|
|
|
static Random* prng_;
|
|
};
|
|
|
|
} // namespace dart
|
|
|
|
#endif // RUNTIME_VM_PORT_H_
|