add init for global FullData

core/structs.go

@@ -8,8 +8,6 @@
 // terms of the GNU General Public License Version 3.0.
 // https://www.gnu.org/licenses/gpl-3.0-standalone.html
 
-// package core implements the structs and other necessary resources for storing
-// and managing feeds and pages
 package core
 
 import (
@@ -110,6 +108,30 @@ func (f *Feed) Swap(i, j int) {
 	f.Items[i], f.Items[j] = f.Items[j], f.Items[i]
 }
 
+// Lock locks both feed and page mutexes.
+func (j *JsonData) Lock() {
+	j.FeedsMu.Lock()
+	j.PagesMu.Lock()
+}
+
+// Unlock unlocks both feed and page mutexes.
+func (j *JsonData) Unlock() {
+	j.FeedsMu.Unlock()
+	j.PagesMu.Unlock()
+}
+
+// RLock read-locks both feed and page mutexes.
+func (j *JsonData) RLock() {
+	j.FeedsMu.RLock()
+	j.PagesMu.RLock()
+}
+
+// RUnlock read-unlocks both feed and page mutexes.
+func (j *JsonData) RUnlock() {
+	j.FeedsMu.RUnlock()
+	j.PagesMu.RUnlock()
+}
+
 // PageEntry is a single item on a subscriptions page. It is used for both feeds
 // and pages.
 type PageEntry struct {