1 // Copyright (c) 2023 Huawei Device Co., Ltd. 2 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // you may not use this file except in compliance with the License. 4 // You may obtain a copy of the License at 5 // 6 // http://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 use libc::{c_int, c_uchar, c_uint, c_ulonglong, c_void}; 15 16 // Unstable interface, rust encapsulation temporarily not provided 17 18 type FfrtSysEventHandleT = *mut c_void; 19 type DestroyFunc = extern "C" fn(*mut c_void); 20 type FfrtFdCallBack = extern "C" fn(*const c_void, c_uint, c_uchar); 21 type FfrtExecHook = extern "C" fn(*mut c_void); 22 type FfrtTimerHandle = *mut c_void; 23 24 #[link(name = "ffrt")] 25 // sys_event.h 26 extern "C" { 27 #![allow(unused)] ffrt_sys_event_create(ty: c_int, fd: usize, filter: usize) -> FfrtSysEventHandleT28 fn ffrt_sys_event_create(ty: c_int, fd: usize, filter: usize) -> FfrtSysEventHandleT; ffrt_sys_event_wait(event: FfrtSysEventHandleT, sec: i64) -> c_int29 fn ffrt_sys_event_wait(event: FfrtSysEventHandleT, sec: i64) -> c_int; ffrt_sys_event_destroy(event: FfrtSysEventHandleT, func: DestroyFunc, arg: *mut c_void)30 fn ffrt_sys_event_destroy(event: FfrtSysEventHandleT, func: DestroyFunc, arg: *mut c_void); 31 32 /// Registers the fd to ffrt's epoll. Callback will be called when io events 33 /// arrived. ffrt_poller_register( fd: c_int, events: c_uint, data: *const c_void, callback: FfrtFdCallBack, ) -> c_int34 pub fn ffrt_poller_register( 35 fd: c_int, 36 events: c_uint, 37 data: *const c_void, 38 callback: FfrtFdCallBack, 39 ) -> c_int; 40 41 /// Deregisters the fd from ffrt's epoll. ffrt_poller_deregister(fd: c_int) -> c_int42 pub fn ffrt_poller_deregister(fd: c_int) -> c_int; 43 44 /// Registers a timer to ffrt's timer poller. Callback will be called when 45 /// timer events arrived. ffrt_timer_start( duration: c_ulonglong, waker: *mut c_void, callback: FfrtExecHook, ) -> FfrtTimerHandle46 pub fn ffrt_timer_start( 47 duration: c_ulonglong, 48 waker: *mut c_void, 49 callback: FfrtExecHook, 50 ) -> FfrtTimerHandle; 51 52 /// Deregisters the timer from ffrt's timer poller ffrt_timer_stop(handle: FfrtTimerHandle)53 pub fn ffrt_timer_stop(handle: FfrtTimerHandle); 54 55 /// Checks whether the timer has expired. A returned value of 1 indicates 56 /// the timer has reached its deadline, otherwise, the timer has not expired 57 /// yet. ffrt_timer_query(handle: FfrtTimerHandle) -> c_int58 pub fn ffrt_timer_query(handle: FfrtTimerHandle) -> c_int; 59 60 /// Wakes up the poller to poll timer/io events. ffrt_poller_wakeup()61 pub fn ffrt_poller_wakeup(); 62 } 63