use uWSGIs locking

isso.ini

@@ -3,7 +3,6 @@ http = :8080
 master = true
 processes = 4
 spooler = %v/mail
-queue = 1
 module = isso
 virtualenv = .
 env = ISSO_SETTINGS=%v/sample.cfg

isso/core.py

@@ -197,13 +197,10 @@ class uWSGIMixin(Mixin):
         class Lock():
 
             def __enter__(self):
-                while uwsgi.queue_get(0) == "LOCK":
-                    time.sleep(0.01)
-
-                uwsgi.queue_set(0, "LOCK")
+                uwsgi.lock()
 
             def __exit__(self, exc_type, exc_val, exc_tb):
-                uwsgi.queue_pop()
+                uwsgi.unlock()
 
         def spooler(args):
             try:

isso/views/comment.py

@@ -70,23 +70,20 @@ def new(app, environ, request, uri):
     data['mode'] = (app.conf.getboolean('moderation', 'enabled') and 2) or 1
     data['remote_addr'] = utils.anonymize(str(request.remote_addr))
 
-    # extract site's <h1> title
-    if uri not in app.db.threads:
-        for host in app.conf.getiter('general', 'host'):
-            resp = http.curl('HEAD', host, uri)
-            if resp and resp.status == 200:
-                title = parse.title(resp.read())
-                break
-        else:
-            return Response('URI does not exist', 404)
-    else:
-        title = app.db.threads[uri].title
-
     with app.lock:
         if uri not in app.db.threads:
-            app.db.threads.new(uri, title)
+            for host in app.conf.getiter('general', 'host'):
+                resp = http.curl('HEAD', host, uri)
+                if resp and resp.status == 200:
+                    title = parse.title(resp.read())
+                    break
+            else:
+                return Response('URI does not exist', 404)
 
-    logger.info('new thread: %s -> %s', uri, title)
+            app.db.threads.new(uri, title)
+            logger.info('new thread: %s -> %s', uri, title)
+        else:
+            title = app.db.threads[uri].title
 
     try:
         with app.lock: