45 lines
1.1 KiB
Markdown
45 lines
1.1 KiB
Markdown
|
# TaskGroup::AddDependency
|
|||
|
|
|
|||
|
|
```cpp
|
|||
|
|
void AddDependency(uint64_t taskId, uint64_t dependsOn)
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
为任务添加依赖关系。被依赖的任务必须先完成，当前任务才会开始执行。
|
|||
|
|
|
|||
|
|
**参数：**
|
|||
|
|
- `taskId` - 任务 ID（需要等待的任务）
|
|||
|
|
- `dependsOn` - 依赖的父任务 ID
|
|||
|
|
|
|||
|
|
**返回：** 无
|
|||
|
|
|
|||
|
|
**复杂度：** O(1)
|
|||
|
|
|
|||
|
|
**注意：**
|
|||
|
|
- 如果被依赖的任务不存在或已完成，调用无效果。
|
|||
|
|
- 支持添加多个依赖，但不支持循环依赖。
|
|||
|
|
|
|||
|
|
**示例：**
|
|||
|
|
|
|||
|
|
```cpp
|
|||
|
|
TaskGroup* group = TaskSystem::Get().CreateTaskGroup();
|
|||
|
|
|
|||
|
|
uint64_t init = group->AddTask([]() { Initialize(); });
|
|||
|
|
uint64_t task1 = group->AddTask([]() { Phase1(); });
|
|||
|
|
uint64_t task2 = group->AddTask([]() { Phase2(); });
|
|||
|
|
uint64_t cleanup = group->AddTask([]() { Cleanup(); });
|
|||
|
|
|
|||
|
|
// task1 和 task2 依赖 init
|
|||
|
|
group->AddDependency(task1, init);
|
|||
|
|
group->AddDependency(task2, init);
|
|||
|
|
|
|||
|
|
// cleanup 依赖 task1 和 task2
|
|||
|
|
group->AddDependency(cleanup, task1);
|
|||
|
|
group->AddDependency(cleanup, task2);
|
|||
|
|
|
|||
|
|
group->Wait();
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## 相关文档
|
|||
|
|
|
|||
|
|
- [TaskGroup 总览](task-group.md) - 返回类总览
|