1 /*
2 * Copyright (c) 2021-2024 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
16 #include "task_executor.h"
17
18 #include <pthread.h>
19 #include <thread>
20
21 #include "ffrt.h"
22
23 #include "constants.h"
24 #include "dh_context.h"
25 #include "distributed_hardware_errno.h"
26 #include "distributed_hardware_log.h"
27
28 namespace OHOS {
29 namespace DistributedHardware {
30 namespace {
31 const uint32_t MAX_TASK_QUEUE_LENGTH = 256;
32 }
33 IMPLEMENT_SINGLE_INSTANCE(TaskExecutor);
TaskExecutor()34 TaskExecutor::TaskExecutor() : taskThreadFlag_(true)
35 {
36 DHLOGI("Ctor TaskExecutor");
37 ffrt::submit([this]() { this->TriggerTask(); });
38 }
39
~TaskExecutor()40 TaskExecutor::~TaskExecutor()
41 {
42 DHLOGI("Dtor TaskExecutor");
43 taskThreadFlag_ = false;
44 }
45
PushTask(const std::shared_ptr<Task> task)46 void TaskExecutor::PushTask(const std::shared_ptr<Task> task)
47 {
48 if (task == nullptr) {
49 DHLOGE("Task is null");
50 return;
51 }
52
53 {
54 DHLOGI("Push task: %{public}s", task->GetId().c_str());
55 std::unique_lock<std::mutex> lock(taskQueueMtx_);
56 if (taskQueue_.size() > MAX_TASK_QUEUE_LENGTH) {
57 DHLOGE("Task queue is full");
58 return;
59 }
60 taskQueue_.push(task);
61 }
62
63 condVar_.notify_one();
64 }
65
PopTask()66 std::shared_ptr<Task> TaskExecutor::PopTask()
67 {
68 std::shared_ptr<Task> task = nullptr;
69
70 std::unique_lock<std::mutex> lock(taskQueueMtx_);
71 condVar_.wait(lock, [this] {
72 return !(this->taskQueue_.empty());
73 });
74
75 if (!taskQueue_.empty()) {
76 task = taskQueue_.front();
77 taskQueue_.pop();
78 DHLOGI("Pop task: %{public}s", task->GetId().c_str());
79 }
80
81 return task;
82 }
83
TriggerTask()84 void TaskExecutor::TriggerTask()
85 {
86 int32_t ret = pthread_setname_np(pthread_self(), TRIGGER_TASK);
87 if (ret != DH_FWK_SUCCESS) {
88 DHLOGE("TriggerTask setname failed.");
89 }
90 while (taskThreadFlag_) {
91 std::shared_ptr<Task> task = PopTask();
92 if (task == nullptr) {
93 DHLOGE("Pop a null task, error");
94 continue;
95 }
96
97 auto taskFunc = [task]() {
98 task->DoTask();
99 };
100
101 DHLOGI("Post task to EventBus: %{public}s", task->GetId().c_str());
102 DHContext::GetInstance().GetEventHandler()->PostTask(taskFunc, task->GetId());
103 }
104 }
105 } // namespace DistributedHardware
106 } // namespace OHOS
107