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authorerg@google.com <erg@google.com@0039d316-1c4b-4281-b951-d872f2087c98>2012-07-13 20:49:23 +0000
committererg@google.com <erg@google.com@0039d316-1c4b-4281-b951-d872f2087c98>2012-07-13 20:49:23 +0000
commite628fde3462899ba06af2fbc5285563c456ed5c4 (patch)
treee3ed3eb98c0044b055606bdf8628191b9b99c17c /sandbox/win/src/sharedmem_ipc_server.h
parent23d6315575647756c4be985b895ec2c447e2f088 (diff)
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Emergency revert; rietveld broke; tree broke
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@146646 0039d316-1c4b-4281-b951-d872f2087c98
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diff --git a/sandbox/win/src/sharedmem_ipc_server.h b/sandbox/win/src/sharedmem_ipc_server.h
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-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SANDBOX_SRC_SHAREDMEM_IPC_SERVER_H_
-#define SANDBOX_SRC_SHAREDMEM_IPC_SERVER_H_
-
-#include <list>
-
-#include "base/basictypes.h"
-#include "base/gtest_prod_util.h"
-#include "sandbox/win/src/crosscall_params.h"
-#include "sandbox/win/src/crosscall_server.h"
-#include "sandbox/win/src/sharedmem_ipc_client.h"
-
-// IPC transport implementation that uses shared memory.
-// This is the server side
-//
-// The server side has knowledge about the layout of the shared memory
-// and the state transitions. Both are explained in sharedmem_ipc_client.h
-//
-// As opposed to SharedMemIPClient, the Server object should be one for the
-// entire lifetime of the target process. The server is in charge of creating
-// the events (ping, pong) both for the client and for the target that are used
-// to signal the IPC and also in charge of setting the initial state of the
-// channels.
-//
-// When an IPC is ready, the server relies on being called by on the
-// ThreadPingEventReady callback. The IPC server then retrieves the buffer,
-// marshals it into a CrossCallParam object and calls the Dispatcher, who is in
-// charge of fulfilling the IPC request.
-namespace sandbox {
-
-// the shared memory implementation of the IPC server. There should be one
-// of these objects per target (IPC client) process
-class SharedMemIPCServer {
- public:
- // Creates the IPC server.
- // target_process: handle to the target process. It must be suspended.
- // target_process_id: process id of the target process.
- // target_job: the job object handle associated with the target process.
- // thread_provider: a thread provider object.
- // dispatcher: an object that can service IPC calls.
- SharedMemIPCServer(HANDLE target_process, DWORD target_process_id,
- HANDLE target_job, ThreadProvider* thread_provider,
- Dispatcher* dispatcher);
-
- ~SharedMemIPCServer();
-
- // Initializes the server structures, shared memory structures and
- // creates the kernels events used to signal the IPC.
- bool Init(void* shared_mem, uint32 shared_size, uint32 channel_size);
-
- private:
- // Allow tests to be marked DISABLED_. Note that FLAKY_ and FAILS_ prefixes
- // do not work with sandbox tests.
- FRIEND_TEST_ALL_PREFIXES(IPCTest, SharedMemServerTests);
- // When an event fires (IPC request). A thread from the ThreadProvider
- // will call this function. The context parameter should be the same as
- // provided when ThreadProvider::RegisterWait was called.
- static void __stdcall ThreadPingEventReady(void* context,
- unsigned char);
-
- // Makes the client and server events. This function is called once
- // per channel.
- bool MakeEvents(HANDLE* server_ping, HANDLE* server_pong,
- HANDLE* client_ping, HANDLE* client_pong);
-
- // A copy this structure is maintained per channel.
- // Note that a lot of the fields are just the same of what we have in the IPC
- // object itself. It is better to have the copies since we can dispatch in the
- // static method without worrying about converting back to a member function
- // call or about threading issues.
- struct ServerControl {
- // This channel server ping event.
- HANDLE ping_event;
- // This channel server pong event.
- HANDLE pong_event;
- // The size of this channel.
- uint32 channel_size;
- // The pointer to the actual channel data.
- char* channel_buffer;
- // The pointer to the base of the shared memory.
- char* shared_base;
- // A pointer to this channel's client-side control structure this structure
- // lives in the shared memory.
- ChannelControl* channel;
- // the IPC dispatcher associated with this channel.
- Dispatcher* dispatcher;
- // The target process information associated with this channel.
- ClientInfo target_info;
- };
-
- // Looks for the appropriate handler for this IPC and invokes it.
- static bool InvokeCallback(const ServerControl* service_context,
- void* ipc_buffer, CrossCallReturn* call_result);
-
- // Points to the shared memory channel control which lives at
- // the start of the shared section.
- IPCControl* client_control_;
-
- // Keeps track of the server side objects that are used to answer an IPC.
- typedef std::list<ServerControl*> ServerContexts;
- ServerContexts server_contexts_;
-
- // The thread provider provides the threads that call back into this object
- // when the IPC events fire.
- ThreadProvider* thread_provider_;
-
- // The IPC object is associated with a target process.
- HANDLE target_process_;
-
- // The target process id associated with the IPC object.
- DWORD target_process_id_;
-
- // The target object is inside a job too.
- HANDLE target_job_object_;
-
- // The dispatcher handles 'ready' IPC calls.
- Dispatcher* call_dispatcher_;
-
- DISALLOW_COPY_AND_ASSIGN(SharedMemIPCServer);
-};
-
-} // namespace sandbox
-
-#endif // SANDBOX_SRC_SHAREDMEM_IPC_SERVER_H_