1 // Copyright 2021 gRPC authors. 2 // 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 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 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 15 #ifndef GRPC_SRC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H 16 #define GRPC_SRC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H 17 18 #include <grpc/support/port_platform.h> 19 20 #include "absl/status/status.h" 21 #include "src/core/lib/iomgr/closure.h" 22 #include "src/core/lib/iomgr/error.h" 23 #include "src/core/lib/iomgr/exec_ctx.h" 24 #include "src/core/util/debug_location.h" 25 26 namespace grpc_core { 27 28 // A callback scheduler for activities that works by scheduling callbacks on the 29 // exec ctx. 30 class ExecCtxWakeupScheduler { 31 public: 32 template <typename ActivityType> 33 class BoundScheduler { 34 protected: BoundScheduler(ExecCtxWakeupScheduler)35 explicit BoundScheduler(ExecCtxWakeupScheduler) {} 36 BoundScheduler(const BoundScheduler&) = delete; 37 BoundScheduler& operator=(const BoundScheduler&) = delete; ScheduleWakeup()38 void ScheduleWakeup() { 39 GRPC_CLOSURE_INIT( 40 &closure_, 41 [](void* arg, grpc_error_handle) { 42 static_cast<ActivityType*>(arg)->RunScheduledWakeup(); 43 }, 44 static_cast<ActivityType*>(this), nullptr); 45 ExecCtx::Run(DEBUG_LOCATION, &closure_, absl::OkStatus()); 46 } 47 48 private: 49 grpc_closure closure_; 50 }; 51 }; 52 53 } // namespace grpc_core 54 55 #endif // GRPC_SRC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H 56