/*
 *
 * Copyright 2017 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_TIMER_MANAGER_H
#define GRPC_CORE_LIB_IOMGR_TIMER_MANAGER_H

#include <grpc/support/port_platform.h>

#include <stdbool.h>

/* Timer Manager tries to keep only one thread waiting for the next timeout at
   all times, and thus effectively preventing the thundering herd problem. */

void grpc_timer_manager_init(void);
void grpc_timer_manager_shutdown(void);

/* enable/disable threading - must be called after grpc_timer_manager_init and
 * before grpc_timer_manager_shutdown */
void grpc_timer_manager_set_threading(bool enabled);
/* explicitly perform one tick of the timer system - for when threading is
 * disabled */
void grpc_timer_manager_tick(void);
/* get global counter that tracks timer wakeups */
uint64_t grpc_timer_manager_get_wakeups_testonly(void);

#endif /* GRPC_CORE_LIB_IOMGR_TIMER_MANAGER_H */