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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "initializer_task.h"
#include <vespa/vespalib/util/executor.h>
#include <vespa/vespalib/stllike/hash_set.h>
#include <cassert>
namespace proton::initializer {
/*
* Class to run multiple init tasks with dependent tasks.
*/
class TaskRunner {
// Executor for the tasks, not to be confused by the context executor.
vespalib::Executor &_executor; // can be multithreaded
uint32_t _runningTasks; // used by context executor
using State = InitializerTask::State;
using TaskList = InitializerTask::List;
using TaskSet = vespalib::hash_set<const void *>;
class Context {
InitializerTask::SP _rootTask;
vespalib::Executor &_contextExecutor; // single threaded executor
vespalib::Executor::Task::UP _doneTask;
public:
using SP = std::shared_ptr<Context>;
Context(InitializerTask::SP rootTask,
vespalib::Executor &contextExecutor,
vespalib::Executor::Task::UP doneTask) noexcept
: _rootTask(rootTask),
_contextExecutor(contextExecutor),
_doneTask(std::move(doneTask))
{
}
bool done() const { return !_doneTask; }
void execute(vespalib::Executor::Task::UP task) {
auto res = _contextExecutor.execute(std::move(task));
assert(!res);
}
void setDone() { execute(std::move(_doneTask)); }
const InitializerTask::SP &rootTask() { return _rootTask; }
};
void getReadyTasks(const InitializerTask::SP task, TaskList &readyTasks, TaskSet &checked);
void setTaskRunning(InitializerTask &task);
void setTaskDone(InitializerTask &task, Context::SP context);
void internalRunTask(InitializerTask::SP task, Context::SP context);
void internalRunTasks(const TaskList &taskList, Context::SP context);
void pollTask(Context::SP context);
public:
TaskRunner(vespalib::Executor &executor);
~TaskRunner();
// Depecreated blocking API
void runTask(InitializerTask::SP task);
// Event based API, executor must be single threaded
void runTask(InitializerTask::SP rootTask,
vespalib::Executor &contextExecutor,
vespalib::Executor::Task::UP doneTask);
};
}
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