Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 108 insertions, 0 deletions

diff --git a/chrome/common/ipc_sync_message.h b/chrome/common/ipc_sync_message.h
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+++ b/chrome/common/ipc_sync_message.h
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+// Copyright 2008, Google Inc.
+// 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 Google Inc. 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 THE COPYRIGHT
+// OWNER OR CONTRIBUTORS 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 CHROME_COMMON_IPC_SYNC_MESSAGE_H__
+#define CHROME_COMMON_IPC_SYNC_MESSAGE_H__
+
+#include <windows.h>
+#include <string>
+#include "base/basictypes.h"
+#include "chrome/common/ipc_message.h"
+
+namespace IPC {
+
+class MessageReplyDeserializer;
+
+class SyncMessage : public Message {
+ public:
+  SyncMessage(int32 routing_id, WORD type, PriorityValue priority,
+              MessageReplyDeserializer* deserializer);
+
+  // Call this to get a deserializer for the output parameters.
+  // Note that this can only be called once, and the caller is responsible
+  // for deleting the deserializer when they're done.
+  MessageReplyDeserializer* GetReplyDeserializer();
+
+  // If this message can cause the receiver to block while waiting for user
+  // input (i.e. by calling MessageBox), then the caller needs to pump window
+  // messages and dispatch asynchronous messages while waiting for the reply.
+  // If this handle is passed in, then window messages will be pumped while
+  // it's set.  The handle must be valid until after the Send call returns.
+  void set_pump_messages_event(HANDLE event) {
+    pump_messages_event_ = event;
+    if (event) {
+      header()->flags |= PUMPING_MSGS_BIT;
+    } else {
+      header()->flags &= ~PUMPING_MSGS_BIT;
+    }
+  }
+
+  HANDLE pump_messages_event() const { return pump_messages_event_; }
+
+  // Returns true if the message is a reply to the given request id.
+  static bool IsMessageReplyTo(const Message& msg, int request_id);
+
+  // Given a reply message, returns an iterator to the beginning of the data
+  // (i.e. skips over the synchronous specific data).
+  static void* GetDataIterator(const Message* msg);
+
+  // Given a synchronous message (or its reply), returns its id.
+  static int GetMessageId(const Message& msg);
+
+  // Generates a reply message to the given message.
+  static Message* GenerateReply(const Message* msg);
+
+ private:
+  struct SyncHeader {
+    // unique ID (unique per sender)
+    int message_id;
+  };
+
+  static bool ReadSyncHeader(const Message& msg, SyncHeader* header);
+  static bool WriteSyncHeader(Message* msg, const SyncHeader& header);
+
+  MessageReplyDeserializer* deserializer_;
+  HANDLE pump_messages_event_;
+
+  static uint32 next_id_;  // for generation of unique ids
+};
+
+// Used to deserialize parameters from a reply to a synchronous message
+class MessageReplyDeserializer {
+ public:
+  bool SerializeOutputParameters(const Message& msg);
+ private:
+  // Derived classes need to implement this, using the given iterator (which
+  // is skipped past the header for synchronous messages).
+  virtual bool SerializeOutputParameters(const Message& msg, void* iter) = 0;
+};
+
+}  // namespace IPC
+
+#endif  // CHROME_COMMON_IPC_SYNC_MESSAGE_H__