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// Copyright 2014 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 MOJO_EDK_SYSTEM_HANDLE_TABLE_H_
#define MOJO_EDK_SYSTEM_HANDLE_TABLE_H_
#include <stdint.h>
#include <vector>
#include "base/containers/hash_tables.h"
#include "base/macros.h"
#include "mojo/edk/system/dispatcher.h"
#include "mojo/public/c/system/types.h"
namespace mojo {
namespace edk {
class HandleTable {
public:
HandleTable();
~HandleTable();
MojoHandle AddDispatcher(scoped_refptr<Dispatcher> dispatcher);
// Inserts multiple dispatchers received from message transit, populating
// |handles| with their newly allocated handles. Returns |true| on success.
bool AddDispatchersFromTransit(
const std::vector<Dispatcher::DispatcherInTransit>& dispatchers,
MojoHandle* handles);
scoped_refptr<Dispatcher> GetDispatcher(MojoHandle handle) const;
MojoResult GetAndRemoveDispatcher(MojoHandle,
scoped_refptr<Dispatcher>* dispatcher);
// Marks handles as busy and populates |dispatchers|. Returns MOJO_RESULT_BUSY
// if any of the handles are already in transit; MOJO_RESULT_INVALID_ARGUMENT
// if any of the handles are invalid; or MOJO_RESULT_OK if successful.
MojoResult BeginTransit(
const MojoHandle* handles,
uint32_t num_handles,
std::vector<Dispatcher::DispatcherInTransit>* dispatchers);
void CompleteTransitAndClose(
const std::vector<Dispatcher::DispatcherInTransit>& dispatchers);
void CancelTransit(
const std::vector<Dispatcher::DispatcherInTransit>& dispatchers);
void GetActiveHandlesForTest(std::vector<MojoHandle> *handles);
private:
struct Entry {
Entry();
explicit Entry(scoped_refptr<Dispatcher> dispatcher);
Entry(const Entry& other);
~Entry();
scoped_refptr<Dispatcher> dispatcher;
bool busy = false;
};
using HandleMap = base::hash_map<MojoHandle, Entry>;
HandleMap handles_;
uint32_t next_available_handle_ = 1;
DISALLOW_COPY_AND_ASSIGN(HandleTable);
};
} // namespace edk
} // namespace mojo
#endif // MOJO_EDK_SYSTEM_HANDLE_TABLE_H_
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