From c8b408beae9bf2118c7792dff5d37f3109646c39 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Mon, 14 Jan 2013 10:10:21 +0100
Subject: InotifyQueue: convert to a class

---
 src/InotifyQueue.cxx  | 57 ++++++++++++++++++++++-----------------------------
 src/InotifyQueue.hxx  | 22 ++++++++++++++------
 src/InotifyUpdate.cxx |  7 ++++---
 3 files changed, 45 insertions(+), 41 deletions(-)

diff --git a/src/InotifyQueue.cxx b/src/InotifyQueue.cxx
index b94abeaa..2b7899ec 100644
--- a/src/InotifyQueue.cxx
+++ b/src/InotifyQueue.cxx
@@ -23,9 +23,6 @@
 #include "Main.hxx"
 #include "event/Loop.hxx"
 
-#include <list>
-#include <string>
-
 #include <glib.h>
 
 #include <string.h>
@@ -42,28 +39,19 @@ enum {
 	INOTIFY_UPDATE_DELAY_S = 5,
 };
 
-static std::list<std::string> inotify_queue;
-static guint queue_source_id;
-
-void
-mpd_inotify_queue_init(void)
+InotifyQueue::~InotifyQueue()
 {
+	if (source_id != 0)
+		g_source_remove(source_id);
 }
 
-void
-mpd_inotify_queue_finish(void)
-{
-	if (queue_source_id != 0)
-		g_source_remove(queue_source_id);
-}
-
-static gboolean
-mpd_inotify_run_update(G_GNUC_UNUSED gpointer data)
+inline bool
+InotifyQueue::Run()
 {
 	unsigned id;
 
-	while (!inotify_queue.empty()) {
-		const char *uri_utf8 = inotify_queue.front().c_str();
+	while (!queue.empty()) {
+		const char *uri_utf8 = queue.front().c_str();
 
 		id = update_enqueue(uri_utf8, false);
 		if (id == 0)
@@ -72,14 +60,21 @@ mpd_inotify_run_update(G_GNUC_UNUSED gpointer data)
 
 		g_debug("updating '%s' job=%u", uri_utf8, id);
 
-		inotify_queue.pop_front();
+		queue.pop_front();
 	}
 
 	/* done, remove the timer event by returning false */
-	queue_source_id = 0;
+	source_id = 0;
 	return false;
 }
 
+gboolean
+InotifyQueue::Run(gpointer data)
+{
+	InotifyQueue &queue = *(InotifyQueue *)data;
+	return queue.Run();
+}
+
 static bool
 path_in(const char *path, const char *possible_parent)
 {
@@ -91,16 +86,14 @@ path_in(const char *path, const char *possible_parent)
 }
 
 void
-mpd_inotify_enqueue(const char *uri_utf8)
+InotifyQueue::Enqueue(const char *uri_utf8)
 {
-	if (queue_source_id != 0)
-		g_source_remove(queue_source_id);
-	queue_source_id = main_loop->AddTimeoutSeconds(INOTIFY_UPDATE_DELAY_S,
-						       mpd_inotify_run_update,
-						       nullptr);
-
-	for (auto i = inotify_queue.begin(), end = inotify_queue.end();
-	     i != end;) {
+	if (source_id != 0)
+		g_source_remove(source_id);
+	source_id = main_loop->AddTimeoutSeconds(INOTIFY_UPDATE_DELAY_S,
+						 Run, nullptr);
+
+	for (auto i = queue.begin(), end = queue.end(); i != end;) {
 		const char *current_uri = i->c_str();
 
 		if (path_in(uri_utf8, current_uri))
@@ -111,10 +104,10 @@ mpd_inotify_enqueue(const char *uri_utf8)
 			/* existing path is a sub-path of the new
 			   path; we can dequeue the existing path and
 			   update the new path instead */
-			i = inotify_queue.erase(i);
+			i = queue.erase(i);
 		else
 			++i;
 	}
 
-	inotify_queue.emplace_back(uri_utf8);
+	queue.emplace_back(uri_utf8);
 }
diff --git a/src/InotifyQueue.hxx b/src/InotifyQueue.hxx
index 158a5dbb..a30cdf09 100644
--- a/src/InotifyQueue.hxx
+++ b/src/InotifyQueue.hxx
@@ -20,13 +20,23 @@
 #ifndef MPD_INOTIFY_QUEUE_HXX
 #define MPD_INOTIFY_QUEUE_HXX
 
-void
-mpd_inotify_queue_init(void);
+#include <glib.h>
 
-void
-mpd_inotify_queue_finish(void);
+#include <list>
+#include <string>
 
-void
-mpd_inotify_enqueue(const char *uri_utf8);
+class InotifyQueue {
+	std::list<std::string> queue;
+	guint source_id;
+
+public:
+	~InotifyQueue();
+
+	void Enqueue(const char *uri_utf8);
+
+private:
+	bool Run();
+	static gboolean Run(gpointer ctx);
+};
 
 #endif
diff --git a/src/InotifyUpdate.cxx b/src/InotifyUpdate.cxx
index 41b93a29..9fe657a1 100644
--- a/src/InotifyUpdate.cxx
+++ b/src/InotifyUpdate.cxx
@@ -57,6 +57,7 @@ struct watch_directory {
 };
 
 static InotifySource *inotify_source;
+static InotifyQueue *inotify_queue;
 
 static unsigned inotify_max_depth;
 static struct watch_directory inotify_root;
@@ -295,7 +296,7 @@ mpd_inotify_callback(int wd, unsigned mask,
 			: g_strdup("");
 
 		if (uri_utf8 != NULL) {
-			mpd_inotify_enqueue(uri_utf8);
+			inotify_queue->Enqueue(uri_utf8);
 			g_free(uri_utf8);
 		}
 	}
@@ -341,7 +342,7 @@ mpd_inotify_init(unsigned max_depth)
 
 	recursive_watch_subdirectories(&inotify_root, path, 0);
 
-	mpd_inotify_queue_init();
+	inotify_queue = new InotifyQueue();
 
 	g_debug("watching music directory");
 }
@@ -367,7 +368,7 @@ mpd_inotify_finish(void)
 	if (inotify_source == NULL)
 		return;
 
-	mpd_inotify_queue_finish();
+	delete inotify_queue;
 	delete inotify_source;
 
 	g_tree_foreach(inotify_directories, free_watch_directory, NULL);
-- 
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