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ExecCtx based Activity wakeup mechanism (#27454)
* wakeup scheduler * wakeup scheduler * Automated change: Fix sanity tests * Update exec_ctx_wakeup_scheduler_test.cc * Remove unused name * fix_build Co-authored-by: ctiller <ctiller@users.noreply.github.com>pull/27481/head
Craig Tiller
3 years ago
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7 changed files with 259 additions and 0 deletions
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// Copyright 2021 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef GRPC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H |
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#define GRPC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H |
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#include <grpc/impl/codegen/port_platform.h> |
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#include "src/core/lib/iomgr/exec_ctx.h" |
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namespace grpc_core { |
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// A callback scheduler for activities that works by scheduling callbacks on the
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// exec ctx.
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class ExecCtxWakeupScheduler { |
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public: |
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template <typename ActivityType> |
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void ScheduleWakeup(ActivityType* activity) { |
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GRPC_CLOSURE_INIT( |
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&closure_, |
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[](void* arg, grpc_error_handle) { |
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static_cast<ActivityType*>(arg)->RunScheduledWakeup(); |
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}, |
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activity, grpc_schedule_on_exec_ctx); |
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ExecCtx::Run(DEBUG_LOCATION, &closure_, GRPC_ERROR_NONE); |
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} |
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private: |
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grpc_closure closure_; |
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}; |
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} // namespace grpc_core
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#endif // GRPC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H
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// Copyright 2021 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "src/core/lib/promise/exec_ctx_wakeup_scheduler.h" |
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#include <gtest/gtest.h> |
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#include "src/core/lib/promise/activity.h" |
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namespace grpc_core { |
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TEST(ExecCtxWakeupSchedulerTest, Works) { |
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int state = 0; |
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bool done = false; |
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auto activity = MakeActivity( |
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[&state]() mutable -> Poll<absl::Status> { |
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++state; |
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switch (state) { |
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case 1: |
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return Pending(); |
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case 2: |
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return absl::OkStatus(); |
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default: |
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abort(); |
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} |
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}, |
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ExecCtxWakeupScheduler(), |
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[&done](absl::Status status) { |
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EXPECT_EQ(status, absl::OkStatus()); |
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done = true; |
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}); |
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EXPECT_EQ(state, 1); |
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EXPECT_FALSE(done); |
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{ |
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ExecCtx exec_ctx; |
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EXPECT_FALSE(exec_ctx.HasWork()); |
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activity->ForceWakeup(); |
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EXPECT_TRUE(exec_ctx.HasWork()); |
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EXPECT_EQ(state, 1); |
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EXPECT_FALSE(done); |
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} |
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EXPECT_EQ(state, 2); |
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EXPECT_TRUE(done); |
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} |
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} // namespace grpc_core
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// Hook needed to run ExecCtx outside of iomgr.
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void grpc_set_default_iomgr_platform() {} |
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int main(int argc, char** argv) { |
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::testing::InitGoogleTest(&argc, argv); |
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grpc_core::ExecCtx::GlobalInit(); |
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int r = RUN_ALL_TESTS(); |
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grpc_core::ExecCtx::GlobalShutdown(); |
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return r; |
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} |
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