Provide a generic client-side unary callback API
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a21bb8b..8679c5b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -564,6 +564,7 @@
add_dependencies(buildtests_cxx check_gcp_environment_windows_test)
add_dependencies(buildtests_cxx chttp2_settings_timeout_test)
add_dependencies(buildtests_cxx cli_call_test)
+add_dependencies(buildtests_cxx client_callback_end2end_test)
add_dependencies(buildtests_cxx client_channel_stress_test)
if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_MAC OR _gRPC_PLATFORM_POSIX)
add_dependencies(buildtests_cxx client_crash_test)
@@ -2771,6 +2772,7 @@
src/cpp/client/credentials_cc.cc
src/cpp/client/generic_stub.cc
src/cpp/common/alarm.cc
+ src/cpp/common/callback_common.cc
src/cpp/common/channel_arguments.cc
src/cpp/common/channel_filter.cc
src/cpp/common/completion_queue_cc.cc
@@ -2917,6 +2919,7 @@
include/grpcpp/support/async_unary_call.h
include/grpcpp/support/byte_buffer.h
include/grpcpp/support/channel_arguments.h
+ include/grpcpp/support/client_callback.h
include/grpcpp/support/config.h
include/grpcpp/support/proto_buffer_reader.h
include/grpcpp/support/proto_buffer_writer.h
@@ -3014,7 +3017,9 @@
include/grpcpp/impl/codegen/byte_buffer.h
include/grpcpp/impl/codegen/call.h
include/grpcpp/impl/codegen/call_hook.h
+ include/grpcpp/impl/codegen/callback_common.h
include/grpcpp/impl/codegen/channel_interface.h
+ include/grpcpp/impl/codegen/client_callback.h
include/grpcpp/impl/codegen/client_context.h
include/grpcpp/impl/codegen/client_unary_call.h
include/grpcpp/impl/codegen/completion_queue.h
@@ -3129,6 +3134,7 @@
src/cpp/client/credentials_cc.cc
src/cpp/client/generic_stub.cc
src/cpp/common/alarm.cc
+ src/cpp/common/callback_common.cc
src/cpp/common/channel_arguments.cc
src/cpp/common/channel_filter.cc
src/cpp/common/completion_queue_cc.cc
@@ -3486,6 +3492,7 @@
include/grpcpp/support/async_unary_call.h
include/grpcpp/support/byte_buffer.h
include/grpcpp/support/channel_arguments.h
+ include/grpcpp/support/client_callback.h
include/grpcpp/support/config.h
include/grpcpp/support/proto_buffer_reader.h
include/grpcpp/support/proto_buffer_writer.h
@@ -3583,7 +3590,9 @@
include/grpcpp/impl/codegen/byte_buffer.h
include/grpcpp/impl/codegen/call.h
include/grpcpp/impl/codegen/call_hook.h
+ include/grpcpp/impl/codegen/callback_common.h
include/grpcpp/impl/codegen/channel_interface.h
+ include/grpcpp/impl/codegen/client_callback.h
include/grpcpp/impl/codegen/client_context.h
include/grpcpp/impl/codegen/client_unary_call.h
include/grpcpp/impl/codegen/completion_queue.h
@@ -3993,7 +4002,9 @@
include/grpcpp/impl/codegen/byte_buffer.h
include/grpcpp/impl/codegen/call.h
include/grpcpp/impl/codegen/call_hook.h
+ include/grpcpp/impl/codegen/callback_common.h
include/grpcpp/impl/codegen/channel_interface.h
+ include/grpcpp/impl/codegen/client_callback.h
include/grpcpp/impl/codegen/client_context.h
include/grpcpp/impl/codegen/client_unary_call.h
include/grpcpp/impl/codegen/completion_queue.h
@@ -4171,7 +4182,9 @@
include/grpcpp/impl/codegen/byte_buffer.h
include/grpcpp/impl/codegen/call.h
include/grpcpp/impl/codegen/call_hook.h
+ include/grpcpp/impl/codegen/callback_common.h
include/grpcpp/impl/codegen/channel_interface.h
+ include/grpcpp/impl/codegen/client_callback.h
include/grpcpp/impl/codegen/client_context.h
include/grpcpp/impl/codegen/client_unary_call.h
include/grpcpp/impl/codegen/completion_queue.h
@@ -4247,6 +4260,7 @@
src/cpp/client/credentials_cc.cc
src/cpp/client/generic_stub.cc
src/cpp/common/alarm.cc
+ src/cpp/common/callback_common.cc
src/cpp/common/channel_arguments.cc
src/cpp/common/channel_filter.cc
src/cpp/common/completion_queue_cc.cc
@@ -4392,6 +4406,7 @@
include/grpcpp/support/async_unary_call.h
include/grpcpp/support/byte_buffer.h
include/grpcpp/support/channel_arguments.h
+ include/grpcpp/support/client_callback.h
include/grpcpp/support/config.h
include/grpcpp/support/proto_buffer_reader.h
include/grpcpp/support/proto_buffer_writer.h
@@ -4489,7 +4504,9 @@
include/grpcpp/impl/codegen/byte_buffer.h
include/grpcpp/impl/codegen/call.h
include/grpcpp/impl/codegen/call_hook.h
+ include/grpcpp/impl/codegen/callback_common.h
include/grpcpp/impl/codegen/channel_interface.h
+ include/grpcpp/impl/codegen/client_callback.h
include/grpcpp/impl/codegen/client_context.h
include/grpcpp/impl/codegen/client_unary_call.h
include/grpcpp/impl/codegen/completion_queue.h
@@ -11297,6 +11314,46 @@
endif (gRPC_BUILD_TESTS)
if (gRPC_BUILD_TESTS)
+add_executable(client_callback_end2end_test
+ test/cpp/end2end/client_callback_end2end_test.cc
+ third_party/googletest/googletest/src/gtest-all.cc
+ third_party/googletest/googlemock/src/gmock-all.cc
+)
+
+
+target_include_directories(client_callback_end2end_test
+ PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}
+ PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include
+ PRIVATE ${_gRPC_SSL_INCLUDE_DIR}
+ PRIVATE ${_gRPC_PROTOBUF_INCLUDE_DIR}
+ PRIVATE ${_gRPC_ZLIB_INCLUDE_DIR}
+ PRIVATE ${_gRPC_BENCHMARK_INCLUDE_DIR}
+ PRIVATE ${_gRPC_CARES_INCLUDE_DIR}
+ PRIVATE ${_gRPC_GFLAGS_INCLUDE_DIR}
+ PRIVATE ${_gRPC_ADDRESS_SORTING_INCLUDE_DIR}
+ PRIVATE ${_gRPC_NANOPB_INCLUDE_DIR}
+ PRIVATE third_party/googletest/googletest/include
+ PRIVATE third_party/googletest/googletest
+ PRIVATE third_party/googletest/googlemock/include
+ PRIVATE third_party/googletest/googlemock
+ PRIVATE ${_gRPC_PROTO_GENS_DIR}
+)
+
+target_link_libraries(client_callback_end2end_test
+ ${_gRPC_PROTOBUF_LIBRARIES}
+ ${_gRPC_ALLTARGETS_LIBRARIES}
+ grpc++_test_util
+ grpc_test_util
+ grpc++
+ grpc
+ gpr_test_util
+ gpr
+ ${_gRPC_GFLAGS_LIBRARIES}
+)
+
+endif (gRPC_BUILD_TESTS)
+if (gRPC_BUILD_TESTS)
+
add_executable(client_channel_stress_test
${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/lb/v1/load_balancer.pb.cc
${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/lb/v1/load_balancer.grpc.pb.cc