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+/**
+ * @file _httpretryqueue.h
+ * @brief Internal declaration for the operation retry queue
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#ifndef _LLCORE_HTTP_RETRY_QUEUE_H_
+#define _LLCORE_HTTP_RETRY_QUEUE_H_
+
+
+#include <queue>
+
+#include "_httpoprequest.h"
+
+
+namespace LLCore
+{
+
+/// HttpRetryQueue provides a simple priority queue for HttpOpRequest objects.
+///
+/// This uses the priority_queue adaptor class to provide the queue
+/// as well as the ordering scheme while allowing us access to the
+/// raw container if we follow a few simple rules. One of the more
+/// important of those rules is that any iterator becomes invalid
+/// on element erasure. So pay attention.
+///
+/// Threading: not thread-safe. Expected to be used entirely by
+/// a single thread, typically a worker thread of some sort.
+
+struct HttpOpRetryCompare
+{
+ bool operator()(const HttpOpRequest * lhs, const HttpOpRequest * rhs)
+ {
+ return lhs->mPolicyRetryAt < rhs->mPolicyRetryAt;
+ }
+};
+
+
+typedef std::priority_queue<HttpOpRequest *,
+ std::deque<HttpOpRequest *>,
+ LLCore::HttpOpRetryCompare> HttpRetryQueueBase;
+
+class HttpRetryQueue : public HttpRetryQueueBase
+{
+public:
+ HttpRetryQueue()
+ : HttpRetryQueueBase()
+ {}
+
+ ~HttpRetryQueue()
+ {}
+
+protected:
+ HttpRetryQueue(const HttpRetryQueue &); // Not defined
+ void operator=(const HttpRetryQueue &); // Not defined
+
+public:
+ const container_type & get_container() const
+ {
+ return c;
+ }
+
+ container_type & get_container()
+ {
+ return c;
+ }
+
+}; // end class HttpRetryQueue
+
+
+} // end namespace LLCore
+
+
+#endif // _LLCORE_HTTP_RETRY_QUEUE_H_