1 // Copyright 2021 The gRPC Authors
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
7 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 #include <grpc/support/port_platform.h>
16 #ifdef GRPC_USE_EVENT_ENGINE
17 #include "src/core/lib/iomgr/event_engine/endpoint.h"
19 #include <grpc/event_engine/event_engine.h>
20 #include <grpc/slice.h>
21 #include <grpc/slice_buffer.h>
22 #include <grpc/support/time.h>
23 #include "absl/strings/string_view.h"
25 #include "src/core/lib/address_utils/sockaddr_utils.h"
26 #include "src/core/lib/channel/channel_args.h"
27 #include "src/core/lib/iomgr/endpoint.h"
28 #include "src/core/lib/iomgr/error.h"
29 #include "src/core/lib/iomgr/event_engine/closure.h"
30 #include "src/core/lib/iomgr/event_engine/pollset.h"
31 #include "src/core/lib/iomgr/pollset.h"
32 #include "src/core/lib/iomgr/pollset_set.h"
33 #include "src/core/lib/iomgr/resource_quota.h"
34 #include "src/core/lib/transport/error_utils.h"
36 extern grpc_core::TraceFlag grpc_tcp_trace;
40 using ::grpc_event_engine::experimental::EventEngine;
41 using ::grpc_event_engine::experimental::ResolvedAddressToURI;
42 using ::grpc_event_engine::experimental::SliceBuffer;
44 void endpoint_read(grpc_endpoint* ep, grpc_slice_buffer* slices,
45 grpc_closure* cb, bool /* urgent */) {
46 auto* eeep = reinterpret_cast<grpc_event_engine_endpoint*>(ep);
47 if (eeep->endpoint == nullptr) {
48 grpc_core::ExecCtx::Run(DEBUG_LOCATION, cb, GRPC_ERROR_CANCELLED);
51 SliceBuffer* read_buffer = new (&eeep->read_buffer) SliceBuffer(slices);
53 [eeep, cb](absl::Status status) {
54 auto* read_buffer = reinterpret_cast<SliceBuffer*>(&eeep->read_buffer);
55 read_buffer->~SliceBuffer();
56 grpc_core::ExecCtx exec_ctx;
57 grpc_core::Closure::Run(DEBUG_LOCATION, cb,
58 absl_status_to_grpc_error(status));
60 grpc_pollset_ee_broadcast_event();
65 void endpoint_write(grpc_endpoint* ep, grpc_slice_buffer* slices,
66 grpc_closure* cb, void* arg) {
67 // TODO(hork): adapt arg to some metrics collection mechanism.
69 auto* eeep = reinterpret_cast<grpc_event_engine_endpoint*>(ep);
70 if (eeep->endpoint == nullptr) {
71 grpc_core::ExecCtx::Run(DEBUG_LOCATION, cb, GRPC_ERROR_CANCELLED);
74 SliceBuffer* write_buffer = new (&eeep->write_buffer) SliceBuffer(slices);
75 eeep->endpoint->Write(
76 [eeep, cb](absl::Status status) {
78 reinterpret_cast<SliceBuffer*>(&eeep->write_buffer);
79 write_buffer->~SliceBuffer();
80 grpc_core::ExecCtx exec_ctx;
81 grpc_core::Closure::Run(DEBUG_LOCATION, cb,
82 absl_status_to_grpc_error(status));
84 grpc_pollset_ee_broadcast_event();
88 void endpoint_add_to_pollset(grpc_endpoint* /* ep */,
89 grpc_pollset* /* pollset */) {}
90 void endpoint_add_to_pollset_set(grpc_endpoint* /* ep */,
91 grpc_pollset_set* /* pollset */) {}
92 void endpoint_delete_from_pollset_set(grpc_endpoint* /* ep */,
93 grpc_pollset_set* /* pollset */) {}
94 /// After shutdown, all endpoint operations except destroy are no-op,
95 /// and will return some kind of sane default (empty strings, nullptrs, etc). It
96 /// is the caller's responsibility to ensure that calls to endpoint_shutdown are
98 void endpoint_shutdown(grpc_endpoint* ep, grpc_error* why) {
99 auto* eeep = reinterpret_cast<grpc_event_engine_endpoint*>(ep);
100 if (GRPC_TRACE_FLAG_ENABLED(grpc_tcp_trace)) {
101 const char* str = grpc_error_string(why);
102 gpr_log(GPR_INFO, "TCP Endpoint %p shutdown why=%s", eeep->endpoint.get(),
105 grpc_resource_user_shutdown(eeep->ru);
106 eeep->endpoint.reset();
109 void endpoint_destroy(grpc_endpoint* ep) {
110 auto* eeep = reinterpret_cast<grpc_event_engine_endpoint*>(ep);
111 grpc_resource_user_unref(eeep->ru);
115 grpc_resource_user* endpoint_get_resource_user(grpc_endpoint* ep) {
116 auto* eeep = reinterpret_cast<grpc_event_engine_endpoint*>(ep);
120 absl::string_view endpoint_get_peer(grpc_endpoint* ep) {
121 auto* eeep = reinterpret_cast<grpc_event_engine_endpoint*>(ep);
122 if (eeep->endpoint == nullptr) {
125 if (eeep->peer_address.empty()) {
126 const EventEngine::ResolvedAddress& addr = eeep->endpoint->GetPeerAddress();
127 eeep->peer_address = ResolvedAddressToURI(addr);
129 return eeep->peer_address;
132 absl::string_view endpoint_get_local_address(grpc_endpoint* ep) {
133 auto* eeep = reinterpret_cast<grpc_event_engine_endpoint*>(ep);
134 if (eeep->endpoint == nullptr) {
137 if (eeep->local_address.empty()) {
138 const EventEngine::ResolvedAddress& addr =
139 eeep->endpoint->GetLocalAddress();
140 eeep->local_address = ResolvedAddressToURI(addr);
142 return eeep->local_address;
145 int endpoint_get_fd(grpc_endpoint* /* ep */) { return -1; }
147 bool endpoint_can_track_err(grpc_endpoint* /* ep */) { return false; }
149 grpc_endpoint_vtable grpc_event_engine_endpoint_vtable = {
152 endpoint_add_to_pollset,
153 endpoint_add_to_pollset_set,
154 endpoint_delete_from_pollset_set,
157 endpoint_get_resource_user,
159 endpoint_get_local_address,
161 endpoint_can_track_err};
165 grpc_event_engine_endpoint* grpc_tcp_server_endpoint_create(
166 std::unique_ptr<EventEngine::Endpoint> ee_endpoint) {
167 auto endpoint = new grpc_event_engine_endpoint;
168 endpoint->base.vtable = &grpc_event_engine_endpoint_vtable;
169 // TODO(hork): populate endpoint->ru from the uvEngine's subclass
170 endpoint->endpoint = std::move(ee_endpoint);
174 grpc_endpoint* grpc_tcp_create(const grpc_channel_args* channel_args,
175 absl::string_view peer_address) {
176 auto endpoint = new grpc_event_engine_endpoint;
177 endpoint->base.vtable = &grpc_event_engine_endpoint_vtable;
178 grpc_resource_quota* resource_quota =
179 grpc_channel_args_find_pointer<grpc_resource_quota>(
180 channel_args, GRPC_ARG_RESOURCE_QUOTA);
181 if (resource_quota != nullptr) {
182 grpc_resource_quota_ref_internal(resource_quota);
184 resource_quota = grpc_resource_quota_create(nullptr);
186 endpoint->ru = grpc_resource_user_create(resource_quota,
187 std::string(peer_address).c_str());
188 grpc_resource_quota_unref_internal(resource_quota);
189 return &endpoint->base;
192 #endif // GRPC_USE_EVENT_ENGINE