chromium/third_party/grpc/src/src/core/lib/surface/call.h

//
//
// Copyright 2015 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_LIB_SURFACE_CALL_H
#define GRPC_SRC_CORE_LIB_SURFACE_CALL_H

#include <grpc/support/port_platform.h>

#include <stddef.h>
#include <stdint.h>

#include "absl/functional/any_invocable.h"
#include "absl/functional/function_ref.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"

#include <grpc/grpc.h>
#include <grpc/impl/compression_types.h>
#include <grpc/support/atm.h>
#include <grpc/support/log.h>

#include "src/core/lib/channel/channel_fwd.h"
#include "src/core/lib/channel/channel_stack.h"
#include "src/core/lib/channel/context.h"
#include "src/core/lib/debug/trace.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/time.h"
#include "src/core/lib/iomgr/closure.h"
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/iomgr/iomgr_fwd.h"
#include "src/core/lib/iomgr/polling_entity.h"
#include "src/core/lib/promise/arena_promise.h"
#include "src/core/lib/promise/context.h"
#include "src/core/lib/resource_quota/arena.h"
#include "src/core/lib/slice/slice.h"
#include "src/core/lib/surface/api_trace.h"
#include "src/core/lib/surface/channel.h"
#include "src/core/lib/surface/server.h"
#include "src/core/lib/transport/transport.h"

grpc_ioreq_completion_func;

grpc_call_create_args;

namespace grpc_core {
class PromiseBasedCall;
class ServerPromiseBasedCall;

class ServerCallContext { … };

// TODO(ctiller): move more call things into this type
class CallContext { … };

template <>
struct ContextType<CallContext> { … };

}  // namespace grpc_core

// Create a new call based on \a args.
// Regardless of success or failure, always returns a valid new call into *call
//
grpc_error_handle grpc_call_create(grpc_call_create_args* args,
                                   grpc_call** call);

void grpc_call_set_completion_queue(grpc_call* call, grpc_completion_queue* cq);

grpc_core::Arena* grpc_call_get_arena(grpc_call* call);

grpc_call_stack* grpc_call_get_call_stack(grpc_call* call);

grpc_call_error grpc_call_start_batch_and_execute(grpc_call* call,
                                                  const grpc_op* ops,
                                                  size_t nops,
                                                  grpc_closure* closure);

// gRPC core internal version of grpc_call_cancel that does not create
// exec_ctx.
void grpc_call_cancel_internal(grpc_call* call);

// Given the top call_element, get the call object.
grpc_call* grpc_call_from_top_element(grpc_call_element* surface_element);

void grpc_call_log_batch(const char* file, int line, gpr_log_severity severity,
                         const grpc_op* ops, size_t nops);

// Set a context pointer.
// No thread safety guarantees are made wrt this value.
// TODO(#9731): add exec_ctx to destroy
void grpc_call_context_set(grpc_call* call, grpc_context_index elem,
                           void* value, void (*destroy)(void* value));
// Get a context pointer.
void* grpc_call_context_get(grpc_call* call, grpc_context_index elem);

#define GRPC_CALL_LOG_BATCH(sev, ops, nops) …

uint8_t grpc_call_is_client(grpc_call* call);

// Get the estimated memory size for a call BESIDES the call stack. Combined
// with the size of the call stack, it helps estimate the arena size for the
// initial call.
size_t grpc_call_get_initial_size_estimate();

// Return an appropriate compression algorithm for the requested compression \a
// level in the context of \a call.
grpc_compression_algorithm grpc_call_compression_for_level(
    grpc_call* call, grpc_compression_level level);

// Did this client call receive a trailers-only response
// TODO(markdroth): This is currently available only to the C++ API.
//                  Move to surface API if requested by other languages.
bool grpc_call_is_trailers_only(const grpc_call* call);

// Returns the authority for the call, as seen on the server side.
absl::string_view grpc_call_server_authority(const grpc_call* call);

extern grpc_core::TraceFlag grpc_call_error_trace;
extern grpc_core::TraceFlag grpc_compression_trace;

#endif  // GRPC_SRC_CORE_LIB_SURFACE_CALL_H