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//
//
// Copyright 2018 gRPC 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
//
// 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 GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CONTEXT_LIST_ENTRY_H
#define GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CONTEXT_LIST_ENTRY_H
#include <grpc/support/port_platform.h>
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <utility>
#include <vector>
#include "src/core/lib/channel/tcp_tracer.h"
namespace grpc_core {
/// An RPC trace context and associated information. Each RPC/stream is
/// associated with a unique \a context. A new ContextList entry is created when
/// a chunk of data stored in an outgoing buffer is going to be
// sent over the wire. A data chunk being written over the wire is multiplexed
// with bytes from multiple RPCs. If one such RPC is traced, we store the
// following information about the traced RPC:
// - byte_offset_in_stream: Number of bytes belonging to that traced RPC which
// have been sent so far from the start of the RPC stream.
// - relative_start_pos_in_chunk: Starting offset of the traced RPC within
// the current chunk that is being sent.
// - num_traced_bytes_in_chunk: Number of bytes belonging to the traced RPC
// within the current chunk.
class ContextListEntry {
public:
ContextListEntry(void* context, int64_t relative_start_pos,
int64_t num_traced_bytes, size_t byte_offset,
std::shared_ptr<TcpTracerInterface> tcp_tracer)
: trace_context_(context),
relative_start_pos_in_chunk_(relative_start_pos),
num_traced_bytes_in_chunk_(num_traced_bytes),
byte_offset_in_stream_(byte_offset),
tcp_tracer_(std::move(tcp_tracer)) {}
ContextListEntry() = delete;
void* TraceContext() { return trace_context_; }
int64_t RelativeStartPosInChunk() { return relative_start_pos_in_chunk_; }
int64_t NumTracedBytesInChunk() { return num_traced_bytes_in_chunk_; }
size_t ByteOffsetInStream() { return byte_offset_in_stream_; }
std::shared_ptr<TcpTracerInterface> ReleaseTcpTracer() {
return std::move(tcp_tracer_);
}
private:
void* trace_context_;
int64_t relative_start_pos_in_chunk_;
int64_t num_traced_bytes_in_chunk_;
size_t byte_offset_in_stream_;
std::shared_ptr<TcpTracerInterface> tcp_tracer_;
};
/// A list of RPC Contexts
typedef std::vector<ContextListEntry> ContextList;
} // namespace grpc_core
#endif // GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CONTEXT_LIST_ENTRY_H
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