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Revert "Remove unused eventmanager_libuv code (grpc#25796)" (grpc#25807)
This caused problems internally. The interface deletion needs a cherrypick, but I will do an overnight test first, before I reintroduce. CC @nicolasnoble
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| /* | ||
| * | ||
| * Copyright 2019 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_CORE_LIB_IOMGR_POLLER_EVENTMANAGER_INTERFACE_H | ||
| #define GRPC_CORE_LIB_IOMGR_POLLER_EVENTMANAGER_INTERFACE_H | ||
|
|
||
| namespace grpc { | ||
| namespace experimental { | ||
|
|
||
| class BaseEventManagerInterface { | ||
| public: | ||
| virtual ~BaseEventManagerInterface() {} | ||
| }; | ||
|
|
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| class EpollEventManagerInterface : public BaseEventManagerInterface {}; | ||
|
|
||
| } // namespace experimental | ||
| } // namespace grpc | ||
|
|
||
| #endif /* GRPC_CORE_LIB_IOMGR_POLLER_EVENTMANAGER_INTERFACE_H */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| /* | ||
| * | ||
| * Copyright 2019 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. | ||
| * | ||
| */ | ||
|
|
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| #include <grpc/support/port_platform.h> | ||
|
|
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| #include "src/core/lib/iomgr/poller/eventmanager_libuv.h" | ||
|
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| #include <grpc/support/time.h> | ||
|
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| grpc::experimental::LibuvEventManager::Options::Options() : num_workers_(-1) {} | ||
| grpc::experimental::LibuvEventManager::Options::Options(int num_workers) | ||
| : num_workers_(num_workers) {} | ||
|
|
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| grpc::experimental::LibuvEventManager::LibuvEventManager(const Options& options) | ||
| : options_(options) { | ||
| int num_workers = options_.num_workers(); | ||
| // Number of workers can't be 0 if we do not accept thread donation. | ||
| // TODO(guantaol): replaces the hard-coded number with a flag. | ||
| if (num_workers <= 0) num_workers = 32; | ||
|
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| for (int i = 0; i < num_workers; i++) { | ||
| workers_.emplace_back( | ||
| options_.thread_name_prefix().c_str(), | ||
| [](void* em) { static_cast<LibuvEventManager*>(em)->RunWorkerLoop(); }, | ||
| this); | ||
| workers_.back().Start(); | ||
| } | ||
| } | ||
|
|
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| grpc::experimental::LibuvEventManager::~LibuvEventManager() { | ||
| Shutdown(); | ||
| for (auto& th : workers_) { | ||
| th.Join(); | ||
| } | ||
| } | ||
|
|
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| void grpc::experimental::LibuvEventManager::RunWorkerLoop() { | ||
| while (true) { | ||
| // TODO(guantaol): extend the worker loop with real work. | ||
| if (ShouldStop()) return; | ||
| gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC), | ||
| gpr_time_from_micros(10, GPR_TIMESPAN))); | ||
| } | ||
| } | ||
|
|
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| bool grpc::experimental::LibuvEventManager::ShouldStop() { | ||
| return should_stop_.Load(grpc_core::MemoryOrder::ACQUIRE) != 0; | ||
| } | ||
|
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| void grpc::experimental::LibuvEventManager::Shutdown() { | ||
| if (should_stop_.Load(grpc_core::MemoryOrder::ACQUIRE)) { | ||
| return; // Already shut down. | ||
| } | ||
|
|
||
| { | ||
| grpc_core::MutexLock lock(&shutdown_mu_); | ||
| while (shutdown_refcount_.Load(grpc_core::MemoryOrder::ACQUIRE) > 0) { | ||
| shutdown_cv_.Wait(&shutdown_mu_); | ||
| } | ||
| } | ||
| should_stop_.Store(true, grpc_core::MemoryOrder::RELEASE); | ||
| } | ||
|
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| void grpc::experimental::LibuvEventManager::ShutdownRef() { | ||
| shutdown_refcount_.FetchAdd(1, grpc_core::MemoryOrder::RELAXED); | ||
| } | ||
|
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| void grpc::experimental::LibuvEventManager::ShutdownUnref() { | ||
| if (shutdown_refcount_.FetchSub(1, grpc_core::MemoryOrder::ACQ_REL) == 1) { | ||
| grpc_core::MutexLock lock(&shutdown_mu_); | ||
| shutdown_cv_.Signal(); | ||
| } | ||
| } |
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