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// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef PREFETCHER_SESSION_MANAGER_H_
#define PREFETCHER_SESSION_MANAGER_H_
#include <optional>
#include <ostream>
#include <memory>
namespace iorap {
namespace prefetcher {
class Session;
enum class SessionKind : uint32_t {
kInProcessDirect,
kOutOfProcessIpc,
kOutOfProcessSocket,
};
inline std::ostream& operator<<(std::ostream& os, SessionKind kind) {
if (kind == SessionKind::kInProcessDirect) {
os << "kInProcessDirect";
} else if (kind == SessionKind::kOutOfProcessIpc) {
os << "kOutOfProcessIpc";
} else if (kind == SessionKind::kOutOfProcessSocket) {
os << "kOutOfProcessSocket";
} else {
os << "(invalid)";
}
return os;
}
class SessionManager {
public:
static std::unique_ptr<SessionManager> CreateManager(SessionKind kind);
// Create a new session. The description is used by Dump.
// Manager maintains a strong ref to this session, so DestroySession must also
// be called prior to all refs dropping to 0.
virtual std::shared_ptr<Session> CreateSession(size_t session_id,
std::string description) = 0;
// Create a new session. The description is used by Dump.
// Manager maintains a strong ref to this session, so DestroySession must also
// be called prior to all refs dropping to 0.
virtual std::shared_ptr<Session> CreateSession(size_t session_id,
std::string description,
std::optional<int> fd) {
return CreateSession(session_id, description);
}
// Look up an existing session that was already created.
// Returns null if there is no such session.
virtual std::shared_ptr<Session> FindSession(size_t session_id) const = 0;
// Drop all manager references to an existing session.
// Returns false if the session does not exist already.
virtual bool DestroySession(size_t session_id) = 0;
// Multi-line detailed dump, e.g. for dumpsys.
// Single-line summary dump, e.g. for logcat.
virtual void Dump(std::ostream& os, bool multiline) const = 0;
// Note: session lifetime is tied to manager. The manager has strong pointers to sessions.
virtual ~SessionManager() {}
protected:
SessionManager();
};
// Single-line summary dump of Session.
std::ostream& operator<<(std::ostream&os, const SessionManager& session);
} // namespace prefetcher
} // namespace iorap
#endif
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