src/core/lib/promise/exec_ctx_wakeup_scheduler.h

// Copyright 2021 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_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H
#define GRPC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H

#include <grpc/support/port_platform.h>

#include "src/core/lib/gprpp/debug_location.h"
#include "src/core/lib/iomgr/closure.h"
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/iomgr/exec_ctx.h"

namespace grpc_core {

// A callback scheduler for activities that works by scheduling callbacks on the
// exec ctx.
class ExecCtxWakeupScheduler {
 public:
  template <typename ActivityType>
  void ScheduleWakeup(ActivityType* activity) {
    GRPC_CLOSURE_INIT(
        &closure_,
        [](void* arg, grpc_error_handle) {
          static_cast<ActivityType*>(arg)->RunScheduledWakeup();
        },
        activity, grpc_schedule_on_exec_ctx);
    ExecCtx::Run(DEBUG_LOCATION, &closure_, GRPC_ERROR_NONE);
  }

 private:
  grpc_closure closure_;
};

}  // namespace grpc_core

#endif  // GRPC_CORE_LIB_PROMISE_EXEC_CTX_WAKEUP_SCHEDULER_H