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