1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef INCLUDE_PERFETTO_TRACING_INTERNAL_BASIC_TYPES_H_ 18 #define INCLUDE_PERFETTO_TRACING_INTERNAL_BASIC_TYPES_H_ 19 20 #include <stddef.h> 21 #include <stdint.h> 22 23 namespace perfetto { 24 namespace internal { 25 26 // A static_assert in tracing_muxer_impl.cc guarantees that this stays in sync 27 // with the definition in tracing/core/basic_types.h 28 using BufferId = uint16_t; 29 30 // This is a direct index in the TracingMuxer::backends_ vector. 31 // Backends are only added and never removed. 32 using TracingBackendId = size_t; 33 34 // Max numbers of data sources that can be registered in a process. 35 constexpr size_t kMaxDataSources = 32; 36 37 // Max instances for each data source type. This typically matches the 38 // "max number of concurrent tracing sessions". However remember that a data 39 // source can be instantiated more than once within one tracing session by 40 // creating two entries for it in the trace config. 41 constexpr size_t kMaxDataSourceInstances = 8; 42 43 } // namespace internal 44 } // namespace perfetto 45 46 #endif // INCLUDE_PERFETTO_TRACING_INTERNAL_BASIC_TYPES_H_ 47