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// Copyright 2021 The Pigweed Authors
//
// 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
//
// https://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.
#pragma once
#include "pw_rpc/internal/config.h"
#include "pw_sync/lock_annotations.h"
#include "pw_toolchain/no_destructor.h"
#if PW_RPC_USE_GLOBAL_MUTEX
#include "pw_sync/mutex.h" // nogncheck
#endif // PW_RPC_USE_GLOBAL_MUTEX
namespace pw::rpc::internal {
#if PW_RPC_USE_GLOBAL_MUTEX
using RpcLock = sync::Mutex;
#else
class PW_LOCKABLE("pw::rpc::internal::RpcLock") RpcLock {
public:
constexpr void lock() PW_EXCLUSIVE_LOCK_FUNCTION() {}
constexpr void unlock() PW_UNLOCK_FUNCTION() {}
};
#endif // PW_RPC_USE_GLOBAL_MUTEX
inline RpcLock& rpc_lock() {
static NoDestructor<RpcLock> lock;
return *lock;
}
class PW_SCOPED_LOCKABLE RpcLockGuard {
public:
RpcLockGuard() PW_EXCLUSIVE_LOCK_FUNCTION(rpc_lock()) { rpc_lock().lock(); }
~RpcLockGuard() PW_UNLOCK_FUNCTION(rpc_lock()) { rpc_lock().unlock(); }
};
// Releases the RPC lock, yields, and reacquires it.
void YieldRpcLock() PW_EXCLUSIVE_LOCKS_REQUIRED(rpc_lock());
} // namespace pw::rpc::internal
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