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a53c12d07a
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
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_PORT_H_
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#define RUNTIME_VM_PORT_H_
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#include <memory>
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#include "include/dart_api.h"
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#include "vm/allocation.h"
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#include "vm/globals.h"
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#include "vm/json_stream.h"
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#include "vm/random.h"
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namespace dart {
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class Isolate;
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class Message;
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class MessageHandler;
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class Mutex;
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class PortMapTestPeer;
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class PortMap : public AllStatic {
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public:
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enum PortState {
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kNewPort = 0, // a newly allocated port
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kLivePort = 1, // a regular port (has a ReceivePort)
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kControlPort = 2, // a special control port (has a ReceivePort)
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};
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// Allocate a port for the provided handler and return its VM-global id.
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static Dart_Port CreatePort(MessageHandler* handler);
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// Indicates that a port has had a ReceivePort created for it at the
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// dart language level. The port remains live until it is closed.
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static void SetPortState(Dart_Port id, PortState kind);
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// Close the port with id. All pending messages will be dropped.
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//
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// Returns true if the port is successfully closed.
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static bool ClosePort(Dart_Port id);
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// Close all the ports for the provided handler.
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static void ClosePorts(MessageHandler* handler);
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// Enqueues the message in the port with id. Returns false if the port is not
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// active any longer.
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//
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// Claims ownership of 'message'.
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static bool PostMessage(std::unique_ptr<Message> message,
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bool before_events = false);
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// Returns whether a port is local to the current isolate.
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static bool IsLocalPort(Dart_Port id);
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// Returns the owning Isolate for port 'id'.
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static Isolate* GetIsolate(Dart_Port id);
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static void Init();
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static void Cleanup();
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static void PrintPortsForMessageHandler(MessageHandler* handler,
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JSONStream* stream);
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static void DebugDumpForMessageHandler(MessageHandler* handler);
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private:
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friend class dart::PortMapTestPeer;
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// Mapping between port numbers and handlers.
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//
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// Free entries have id == 0 and handler == NULL. Deleted entries
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// have id == 0 and handler == deleted_entry_.
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typedef struct {
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Dart_Port port;
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MessageHandler* handler;
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PortState state;
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} Entry;
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static const char* PortStateString(PortState state);
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// Allocate a new unique port.
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static Dart_Port AllocatePort();
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static bool IsActivePort(Dart_Port id);
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static bool IsLivePort(Dart_Port id);
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static intptr_t FindPort(Dart_Port port);
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static void Rehash(intptr_t new_capacity);
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static void MaintainInvariants();
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// Lock protecting access to the port map.
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static Mutex* mutex_;
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// Hashmap of ports.
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static Entry* map_;
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static MessageHandler* deleted_entry_;
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static intptr_t capacity_;
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static intptr_t used_;
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static intptr_t deleted_;
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static Random* prng_;
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};
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} // namespace dart
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#endif // RUNTIME_VM_PORT_H_
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