--- /dev/null
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include <grpc/grpc.h>
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/channel/channel_stack.h"
+#include "src/core/lib/gpr/string.h"
+#include "src/core/lib/gprpp/atomic.h"
+#include "src/core/lib/surface/api_trace.h"
+#include "src/core/lib/surface/call.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/surface/lame_client.h"
+#include "src/core/lib/transport/static_metadata.h"
+
+namespace grpc_core {
+
+namespace {
+
+struct CallData {
+ grpc_core::CallCombiner* call_combiner;
+ grpc_linked_mdelem status;
+ grpc_linked_mdelem details;
+ grpc_core::Atomic<bool> filled_metadata;
+};
+
+struct ChannelData {
+ grpc_status_code error_code;
+ const char* error_message;
+};
+
+static void fill_metadata(grpc_call_element* elem, grpc_metadata_batch* mdb) {
+ CallData* calld = static_cast<CallData*>(elem->call_data);
+ bool expected = false;
+ if (!calld->filled_metadata.CompareExchangeStrong(
+ &expected, true, MemoryOrder::RELAXED, MemoryOrder::RELAXED)) {
+ return;
+ }
+ ChannelData* chand = static_cast<ChannelData*>(elem->channel_data);
+ char tmp[GPR_LTOA_MIN_BUFSIZE];
+ gpr_ltoa(chand->error_code, tmp);
+ calld->status.md = grpc_mdelem_from_slices(
+ GRPC_MDSTR_GRPC_STATUS, grpc_core::UnmanagedMemorySlice(tmp));
+ calld->details.md = grpc_mdelem_from_slices(
+ GRPC_MDSTR_GRPC_MESSAGE,
+ grpc_core::UnmanagedMemorySlice(chand->error_message));
+ calld->status.prev = calld->details.next = nullptr;
+ calld->status.next = &calld->details;
+ calld->details.prev = &calld->status;
+ mdb->list.head = &calld->status;
+ mdb->list.tail = &calld->details;
+ mdb->list.count = 2;
+ mdb->deadline = GRPC_MILLIS_INF_FUTURE;
+}
+
+static void lame_start_transport_stream_op_batch(
+ grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
+ CallData* calld = static_cast<CallData*>(elem->call_data);
+ if (op->recv_initial_metadata) {
+ fill_metadata(elem,
+ op->payload->recv_initial_metadata.recv_initial_metadata);
+ } else if (op->recv_trailing_metadata) {
+ fill_metadata(elem,
+ op->payload->recv_trailing_metadata.recv_trailing_metadata);
+ }
+ grpc_transport_stream_op_batch_finish_with_failure(
+ op, GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"),
+ calld->call_combiner);
+}
+
+static void lame_get_channel_info(grpc_channel_element* elem,
+ const grpc_channel_info* channel_info) {}
+
+static void lame_start_transport_op(grpc_channel_element* elem,
+ grpc_transport_op* op) {
+ if (op->on_connectivity_state_change) {
+ GPR_ASSERT(*op->connectivity_state != GRPC_CHANNEL_SHUTDOWN);
+ *op->connectivity_state = GRPC_CHANNEL_SHUTDOWN;
+ GRPC_CLOSURE_SCHED(op->on_connectivity_state_change, GRPC_ERROR_NONE);
+ }
+ if (op->send_ping.on_initiate != nullptr) {
+ GRPC_CLOSURE_SCHED(
+ op->send_ping.on_initiate,
+ GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"));
+ }
+ if (op->send_ping.on_ack != nullptr) {
+ GRPC_CLOSURE_SCHED(
+ op->send_ping.on_ack,
+ GRPC_ERROR_CREATE_FROM_STATIC_STRING("lame client channel"));
+ }
+ GRPC_ERROR_UNREF(op->disconnect_with_error);
+ if (op->on_consumed != nullptr) {
+ GRPC_CLOSURE_SCHED(op->on_consumed, GRPC_ERROR_NONE);
+ }
+}
+
+static grpc_error* init_call_elem(grpc_call_element* elem,
+ const grpc_call_element_args* args) {
+ CallData* calld = static_cast<CallData*>(elem->call_data);
+ calld->call_combiner = args->call_combiner;
+ return GRPC_ERROR_NONE;
+}
+
+static void destroy_call_elem(grpc_call_element* elem,
+ const grpc_call_final_info* final_info,
+ grpc_closure* then_schedule_closure) {
+ GRPC_CLOSURE_SCHED(then_schedule_closure, GRPC_ERROR_NONE);
+}
+
+static grpc_error* init_channel_elem(grpc_channel_element* elem,
+ grpc_channel_element_args* args) {
+ GPR_ASSERT(args->is_first);
+ GPR_ASSERT(args->is_last);
+ return GRPC_ERROR_NONE;
+}
+
+static void destroy_channel_elem(grpc_channel_element* elem) {}
+
+} // namespace
+
+} // namespace grpc_core
+
+const grpc_channel_filter grpc_lame_filter = {
+ grpc_core::lame_start_transport_stream_op_batch,
+ grpc_core::lame_start_transport_op,
+ sizeof(grpc_core::CallData),
+ grpc_core::init_call_elem,
+ grpc_call_stack_ignore_set_pollset_or_pollset_set,
+ grpc_core::destroy_call_elem,
+ sizeof(grpc_core::ChannelData),
+ grpc_core::init_channel_elem,
+ grpc_core::destroy_channel_elem,
+ grpc_core::lame_get_channel_info,
+ "lame-client",
+};
+
+#define CHANNEL_STACK_FROM_CHANNEL(c) ((grpc_channel_stack*)((c) + 1))
+
+grpc_channel* grpc_lame_client_channel_create(const char* target,
+ grpc_status_code error_code,
+ const char* error_message) {
+ grpc_core::ExecCtx exec_ctx;
+ grpc_channel_element* elem;
+ grpc_channel* channel =
+ grpc_channel_create(target, nullptr, GRPC_CLIENT_LAME_CHANNEL, nullptr);
+ elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
+ GRPC_API_TRACE(
+ "grpc_lame_client_channel_create(target=%s, error_code=%d, "
+ "error_message=%s)",
+ 3, (target, (int)error_code, error_message));
+ GPR_ASSERT(elem->filter == &grpc_lame_filter);
+ auto chand = static_cast<grpc_core::ChannelData*>(elem->channel_data);
+ chand->error_code = error_code;
+ chand->error_message = error_message;
+
+ return channel;
+}
git://repos.xcallymotion.com / motion2.git / blobdiff