3 * Copyright 2017 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #ifndef GRPC_CORE_LIB_IOMGR_TIMER_MANAGER_H
20 #define GRPC_CORE_LIB_IOMGR_TIMER_MANAGER_H
22 #include <grpc/support/port_platform.h>
26 /* Timer Manager tries to keep only one thread waiting for the next timeout at
27 all times, and thus effectively preventing the thundering herd problem. */
29 void grpc_timer_manager_init(void);
30 void grpc_timer_manager_shutdown(void);
32 /* enable/disable threading - must be called after grpc_timer_manager_init and
33 * before grpc_timer_manager_shutdown */
34 void grpc_timer_manager_set_threading(bool enabled);
35 /* explicitly perform one tick of the timer system - for when threading is
37 void grpc_timer_manager_tick(void);
38 /* get global counter that tracks timer wakeups */
39 uint64_t grpc_timer_manager_get_wakeups_testonly(void);
41 #endif /* GRPC_CORE_LIB_IOMGR_TIMER_MANAGER_H */