1 // Copyright 2022 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include <span> 17 #include <vector> 18 19 #include "pw_rpc/internal/channel.h" 20 #include "pw_rpc/internal/config.h" 21 22 namespace pw::rpc::internal { 23 24 #if PW_RPC_DYNAMIC_ALLOCATION && !defined(__cpp_lib_constexpr_vector) 25 #define _PW_RPC_CONSTEXPR 26 #else 27 #define _PW_RPC_CONSTEXPR constexpr 28 #endif // PW_RPC_DYNAMIC_ALLOCATION && !defined(__cpp_lib_constexpr_vector) 29 30 class ChannelList { 31 public: ChannelList(std::span<Channel> channels)32 _PW_RPC_CONSTEXPR ChannelList(std::span<Channel> channels) 33 : channels_(channels.begin(), channels.end()) {} 34 35 // Returns the first channel with the matching ID or nullptr if none match. 36 // Except for Channel::kUnassignedChannelId, there should be no duplicate 37 // channels. 38 const Channel* Get(uint32_t channel_id) const; 39 Get(uint32_t channel_id)40 Channel* Get(uint32_t channel_id) { 41 return const_cast<Channel*>( 42 static_cast<const ChannelList&>(*this).Get(channel_id)); 43 } 44 45 // Adds the channel with the requested ID to the list. Returns: 46 // 47 // OK - the channel was added 48 // ALREADY_EXISTS - a channel with this ID is already present; remove it 49 // first 50 // RESOURCE_EXHAUSTED - no unassigned channels are available; only possible 51 // if PW_RPC_DYNAMIC_ALLOCATION is disabled 52 // 53 Status Add(uint32_t channel_id, ChannelOutput& output); 54 55 // Removes the channel with the requested ID. Returns: 56 // 57 // OK - the channel was removed 58 // NOT_FOUND - no channel with the provided ID was found 59 // 60 Status Remove(uint32_t channel_id); 61 62 #if PW_RPC_DYNAMIC_ALLOCATION 63 std::vector<Channel> channels_; 64 #else 65 std::span<Channel> channels_; 66 #endif // PW_RPC_DYNAMIC_ALLOCATION 67 }; 68 69 } // namespace pw::rpc::internal 70