From 1a47cbd7978dcad7ed0b2f2af3f933137eedbfa3 Mon Sep 17 00:00:00 2001
From: Douglas Rumbaugh <dbr4@psu.edu>
Date: Fri, 20 Oct 2023 15:12:46 -0400
Subject: Checkpointing work

I'll probably throw all this out, but I want to stash it just in case.
---
 include/framework/scheduling/Task.h | 52 +++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

(limited to 'include/framework/scheduling/Task.h')

diff --git a/include/framework/scheduling/Task.h b/include/framework/scheduling/Task.h
index 9e0655a..3c1b158 100644
--- a/include/framework/scheduling/Task.h
+++ b/include/framework/scheduling/Task.h
@@ -4,6 +4,7 @@
 #pragma once
 
 #include <variant>
+#include <future>
 
 #include "framework/util/Configuration.h"
 
@@ -14,17 +15,52 @@ enum class TaskType {
     QUERY
 };
 
+struct TaskDependency {
+    std::promise<void> prom;
+    std::future<void> fut;
+};
+
 struct MergeTask {
     level_index m_source_level;
     level_index m_target_level;
     size_t m_timestamp;
     size_t m_size;
     TaskType m_type;
+    std::unique_ptr<TaskDependency> m_dep;
+
+    MergeTask() = default;
+
+    MergeTask(level_index source, level_index target, size_t size, size_t timestamp)
+    : m_source_level(source)
+    , m_target_level(target)
+    , m_timestamp(timestamp)
+    , m_size(size)
+    , m_type(TaskType::MERGE)
+    , m_dep(std::make_unique<TaskDependency>()){}
+
+
+    MergeTask(MergeTask &t)
+    : m_source_level(t.m_source_level)
+    , m_target_level(t.m_target_level)
+    , m_timestamp(t.m_timestamp)
+    , m_size(t.m_size)
+    , m_type(TaskType::MERGE)
+    , m_dep(std::move(t.m_dep))
+    {}
+
 
     TaskType get_type() const {
         return m_type;
     }
 
+    void make_dependent_on(MergeTask &task) {
+        m_dep->fut = task.m_dep->prom.get_future();
+    }
+
+    void make_dependent_on(TaskDependency *dep) {
+        m_dep->fut = dep->prom.get_future();
+    }
+
     friend bool operator<(const MergeTask &self, const MergeTask &other) {
         return self.m_timestamp < other.m_timestamp;
     }
@@ -39,11 +75,27 @@ struct QueryTask {
     size_t m_timestamp;
     size_t m_size;
     TaskType m_type;
+    std::unique_ptr<TaskDependency> m_dep;
+
+    QueryTask(QueryTask &t) 
+        : m_timestamp(t.m_timestamp)
+        , m_size(t.m_size)
+        , m_type(t.m_type)
+        , m_dep(std::move(t.m_dep))
+    {}
 
     TaskType get_type() const {
         return m_type;
     }
 
+    void SetDependency(QueryTask &task) {
+        m_dep->fut = task.m_dep->prom.get_future();
+    }
+
+    void SetDependency(TaskDependency *dep) {
+        m_dep->fut = dep->prom.get_future();
+    }
+
     friend bool operator<(const QueryTask &self, const QueryTask &other) {
         return self.m_timestamp < other.m_timestamp;
     }
-- 
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