From 41a7818b552aef9e6e0bf788089f6ae16ae1e421 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Fri, 26 Aug 2022 23:27:46 -0700
Subject: Mutex wait queues

---
 include/lib/queue.h  | 17 ++---------------
 include/util/mutex.h |  2 ++
 2 files changed, 4 insertions(+), 15 deletions(-)

(limited to 'include')

diff --git a/include/lib/queue.h b/include/lib/queue.h
index 1d4899a..c6da6ed 100644
--- a/include/lib/queue.h
+++ b/include/lib/queue.h
@@ -1,33 +1,20 @@
 #ifndef LIB_QUEUE_H
 #define LIB_QUEUE_H
 
-enum EntryType {
-	VALUE_ENTRY = 0,
-	START_ENTRY = 1,
-	END_ENTRY = 2,
-};
-
 struct Entry {
 	void* value;
 	struct Entry* next;
-	unsigned long entry_type;
 };
 
 struct Queue {
 	struct Entry start;
-	struct Entry end;
 };
 
-// Add to end of queue
-void push_to_queue(struct Entry* e, struct Queue* q);
 // Add to beginning of queue
-void prepend_to_queue(struct Entry* e, struct Queue* q);
+void push_to_queue(struct Entry* e, struct Queue* q);
 // Remove from beginning of queue
 struct Entry* pop_from_queue(struct Queue* q);
-// Remove the entry after this one from its queue
+// Remove the next entry
 struct Entry* remove_next_from_queue(struct Entry* e);
-// Find an entry in a queue
-//  Returns the entry before the target entry
-struct Entry* find_value(void* value, struct Queue* q);
 
 #endif
diff --git a/include/util/mutex.h b/include/util/mutex.h
index cef4c60..da71146 100644
--- a/include/util/mutex.h
+++ b/include/util/mutex.h
@@ -16,6 +16,8 @@
 struct Mutex {
 	unsigned long pid;
 	void* addr;
+	struct Entry* locking_thread;
+	struct Entry* waiting_threads;
 } __attribute__((packed, aligned(4)));
 
 struct MutexManager {
-- 
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