From: Lei Xia <lxia@northwestern.edu>
Date: Mon, 15 Feb 2010 05:49:01 +0000 (-0600)
Subject: Add lock to vmm_queue
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=3dfea481dc48776d8e3a9a2f36527dbe37f454c4;p=palacios-OLD.git

Add lock to vmm_queue
---

diff --git a/palacios/include/palacios/vmm_queue.h b/palacios/include/palacios/vmm_queue.h
index a4994f5..e88329f 100644
--- a/palacios/include/palacios/vmm_queue.h
+++ b/palacios/include/palacios/vmm_queue.h
@@ -25,7 +25,7 @@
 
 #include <palacios/vmm.h>
 #include <palacios/vmm_list.h>
-
+#include <palacios/vmm_lock.h>
 
 
 /* IMPORTANT:
@@ -43,9 +43,7 @@ struct queue_entry {
 struct gen_queue {
     uint_t num_entries;
     struct list_head entries;
-
-    // We really need to implement this....
-    // void * lock;
+    v3_lock_t lock;
 };
 
 
diff --git a/palacios/src/palacios/vmm_queue.c b/palacios/src/palacios/vmm_queue.c
index 2e1f72f..b06ff73 100644
--- a/palacios/src/palacios/vmm_queue.c
+++ b/palacios/src/palacios/vmm_queue.c
@@ -22,9 +22,9 @@
 void v3_init_queue(struct gen_queue * queue) {
     queue->num_entries = 0;
     INIT_LIST_HEAD(&(queue->entries));
+    v3_lock_init(&queue->lock);
 }
 
-
 struct gen_queue * v3_create_queue() {
     struct gen_queue * tmp_queue = V3_Malloc(sizeof(struct gen_queue));
     v3_init_queue(tmp_queue);
@@ -34,15 +34,18 @@ struct gen_queue * v3_create_queue() {
 void v3_enqueue(struct gen_queue * queue, addr_t entry) {
     struct queue_entry * q_entry = V3_Malloc(sizeof(struct queue_entry));
 
+    v3_lock(queue->lock);
     q_entry->entry = entry;
     list_add_tail(&(q_entry->entry_list), &(queue->entries));
     queue->num_entries++;
+    v3_unlock(queue->lock);
 }
 
 
 addr_t v3_dequeue(struct gen_queue * queue) {
     addr_t entry_val = 0;
 
+    v3_lock(queue->lock);
     if (!list_empty(&(queue->entries))) {
 	struct list_head * q_entry = queue->entries.next;
 	struct queue_entry * tmp_entry = list_entry(q_entry, struct queue_entry, entry_list);
@@ -51,6 +54,7 @@ addr_t v3_dequeue(struct gen_queue * queue) {
 	list_del(q_entry);
 	V3_Free(tmp_entry);
     }
+    v3_unlock(queue->lock);
 
     return entry_val;
 }