From 1fb7a9bd5eb41e87871bcbb3423caaabdd8ce1d9 Mon Sep 17 00:00:00 2001
From: bd <bdunahu@operationnull.com>
Date: Fri, 11 Apr 2025 21:22:18 -0400
Subject: First part of storage rework (see description)

- Removed response enum.
- Removed messy ostream override, and cli.cc test class
- Removed accessor enum, and instead used unique pointer to identify accessor.
- Simplified storage by removing is_waiting variables.
- Rewrote DRAM and Cache to use Storage constructor.
---
 inc/cache.h | 55 +++++++++++++++++++++++++------------------------------
 1 file changed, 25 insertions(+), 30 deletions(-)

(limited to 'inc/cache.h')

diff --git a/inc/cache.h b/inc/cache.h
index 88fd352..0f15536 100644
--- a/inc/cache.h
+++ b/inc/cache.h
@@ -3,8 +3,8 @@
 #include "definitions.h"
 #include "storage.h"
 #include <array>
-#include <ostream>
 #include <functional>
+#include <ostream>
 
 class Cache : public Storage
 {
@@ -21,55 +21,52 @@ class Cache : public Storage
 	Cache(Storage *lower, int delay);
 	~Cache();
 
-	Response
-	write_word(Accessor accessor, signed int data, int address) override;
-	Response write_line(
-		Accessor accessor,
-		std::array<signed int, LINE_SIZE> data_line,
-		int address) override;
-	Response read_line(
-		Accessor accessor,
-		int address,
-		std::array<signed int, LINE_SIZE> &data_line) override;
-	Response
-	read_word(Accessor accessor, int address, signed int &data) override;
+	int
+	write_word(void *, signed int, int) override;
+	int
+	write_line(void *, std::array<signed int, LINE_SIZE>, int) override;
+	int
+	read_line(void *, int, std::array<signed int, LINE_SIZE> &) override;
+	int
+	read_word(void *, int, signed int &) override;
 
 	/**
 	 * Getter for the meta attribute.
 	 * TODO this doesn't seem like good object-oriented practice.
 	 * @return this->meta
 	 */
-	std::array<std::array<int, 2>, L1_CACHE_LINES> get_meta() const;
+	std::array<std::array<int, 2>, L1_CACHE_LINES>
+	get_meta() const;
 
   private:
 	/**
 	 * Helper for all access methods.
-	 * Calls `request_handler` when `accessor` is allowed to complete its
+	 * Calls `request_handler` when `id` is allowed to complete its
 	 * request cycle.
 	 * @param the source making the request
 	 * @param the address to write to
 	 * @param the function to call when an access should be completed
 	 */
-	Response process(
-		Accessor accessor,
-		int address,
-		std::function<void(int index, int offset)> request_handler);
+	int
+	process(void *id, int address, std::function<void(int index, int offset)> request_handler);
 	/**
-	 * Returns OK if `accessor` is allowed to complete its request this cycle.
-	 * Handles cache misses, wait times, and setting the current accessor this
+	 * Returns OK if `id` is allowed to complete its request this cycle.
+	 * Handles cache misses, wait times, and setting the current id this
 	 * storage is serving.
-	 * @param the accessor asking for a resource
-	 * @return whether or not the access can be carried out this function call.
+	 * @param the id asking for a resource
+	 * @return 1 if the access can be carried out this function call, 0 otherwise.
 	 */
-	Response is_access_cleared(Accessor accessor, int address);
+	int
+	is_access_cleared(void *id, int address);
 	/**
-	 * Helper for access_cleared.
+	 * Helper for is_access_cleared.
 	 * Fetches `address` from a lower level of storage if it is not already
-	 * present. If it is not, temporarily sets the is_blocked attribute of this
-	 * cache level to true, and the victim line is chosen/written back.
+	 * present. The victim line is chosen/written back.
 	 * @param the address that must be present in cache.
+	 * @param 0 if the address is currently in cache, 1 if it is being fetched.
 	 */
-	void handle_miss(int address);
+	int
+	is_address_missing(int address);
 	/**
 	 * An array of metadata about elements in `data`.
 	 * If the first value of an element is negative, the corresponding
@@ -79,6 +76,4 @@ class Cache : public Storage
 	std::array<std::array<int, 2>, L1_CACHE_LINES> meta;
 };
 
-std::ostream &operator<<(std::ostream &os, const Cache &c);
-
 #endif /* CACHE_H_INCLUDED */
-- 
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