1/*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
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#include "le_task.h"
16#include "le_loop.h"
17
18static void HandleWatcherTaskClose_(const LoopHandle loopHandle, const TaskHandle taskHandle)
19{
20    LE_LOGV("HandleWatcherTaskClose_ fd: %d ", GetSocketFd(taskHandle));
21    DelTask((EventLoop *)loopHandle, (BaseTask *)taskHandle);
22    CloseTask(loopHandle, (BaseTask *)taskHandle);
23}
24
25static LE_STATUS HandleWatcherEvent_(const LoopHandle loopHandle, const TaskHandle taskHandle, uint32_t oper)
26{
27    LE_LOGV("HandleWatcherEvent_ fd: %d oper 0x%x", GetSocketFd(taskHandle), oper);
28    EventLoop *loop = (EventLoop *)loopHandle;
29    WatcherTask *watcher = (WatcherTask *)taskHandle;
30    int fd = GetSocketFd(taskHandle);
31    uint32_t events = oper;
32    uint64_t userData = *(uint64_t *)LE_GetUserData(taskHandle);
33    if (watcher->processEvent != NULL) {
34        watcher->processEvent(taskHandle, fd, &events, (void *)userData);
35    }
36    watcher = (WatcherTask *)GetTaskByFd((EventLoop *)loopHandle, fd);
37    LE_ONLY_CHECK(watcher != NULL, return 0);
38    if (watcher->base.flags & WATCHER_ONCE) {
39        HandleWatcherTaskClose_((LoopHandle)loop, (TaskHandle)watcher);
40        return 0;
41    }
42    if (events == 0) {
43        HandleWatcherTaskClose_((LoopHandle)loop, (TaskHandle)watcher);
44        return 0;
45    }
46    if (events != watcher->events) {
47        watcher->events = events;
48        loop->modEvent(loop, (const BaseTask *)taskHandle, watcher->events);
49    }
50    return LE_SUCCESS;
51}
52
53static void DumpWatcherTaskInfo_(const TaskHandle task)
54{
55    INIT_CHECK(task != NULL, return);
56    BaseTask *baseTask = (BaseTask *)task;
57
58    WatcherTask *watcherTask = (WatcherTask *)baseTask;
59    printf("\tfd: %d \n", watcherTask->base.taskId.fd);
60    printf("\t  TaskType: %s \n", "WatcherTask");
61}
62
63LE_STATUS LE_StartWatcher(const LoopHandle loopHandle,
64    WatcherHandle *watcherHandle, const LE_WatchInfo *info, const void *context)
65{
66    LE_CHECK(loopHandle != NULL && watcherHandle != NULL, return LE_INVALID_PARAM, "Invalid parameters");
67    LE_CHECK(info != NULL && info->processEvent != NULL, return LE_INVALID_PARAM, "Invuint64_talid processEvent");
68
69    LE_BaseInfo baseInfo = {TASK_WATCHER | (info->flags & WATCHER_ONCE), info->close, sizeof(uint64_t)};
70    WatcherTask *task = (WatcherTask *)CreateTask(loopHandle, info->fd, &baseInfo, sizeof(WatcherTask));
71    LE_CHECK(task != NULL, return LE_NO_MEMORY, "Failed to create task");
72    task->base.handleEvent = HandleWatcherEvent_;
73    task->base.innerClose = HandleWatcherTaskClose_;
74    task->base.dumpTaskInfo = DumpWatcherTaskInfo_;
75    task->processEvent = info->processEvent;
76    task->events = info->events;
77    *(uint64_t *)(task + 1) = (uint64_t)context;
78
79    EventLoop *loop = (EventLoop *)loopHandle;
80    loop->addEvent(loop, (const BaseTask *)task, info->events);
81    *watcherHandle = (WatcherHandle)task;
82    return LE_SUCCESS;
83}
84
85void LE_RemoveWatcher(const LoopHandle loopHandle, const WatcherHandle watcherHandle)
86{
87    LE_CHECK(loopHandle != NULL && watcherHandle != NULL, return, "Invalid parameters");
88    LE_CloseTask(loopHandle, watcherHandle);
89}