--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 Red Hat
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+#include "rgw/rgw_rados.h"
+#include "rgw/rgw_http_client.h"
+#include "global/global_init.h"
+#include "common/ceph_argparse.h"
+#include <curl/curl.h>
+#include <gtest/gtest.h>
+
+TEST(HTTPManager, SignalThread)
+{
+ auto cct = g_ceph_context;
+ RGWHTTPManager http(cct);
+
+ ASSERT_EQ(0, http.set_threaded());
+
+ // default pipe buffer size according to man pipe
+ constexpr size_t max_pipe_buffer_size = 65536;
+ // each signal writes 4 bytes to the pipe
+ constexpr size_t max_pipe_signals = max_pipe_buffer_size / sizeof(uint32_t);
+ // add_request and unregister_request
+ constexpr size_t pipe_signals_per_request = 2;
+ // number of http requests to fill the pipe buffer
+ constexpr size_t max_requests = max_pipe_signals / pipe_signals_per_request;
+
+ // send one extra request to test that we don't deadlock
+ constexpr size_t num_requests = max_requests + 1;
+
+ for (size_t i = 0; i < num_requests; i++) {
+ RGWHTTPClient client{cct};
+ http.add_request(&client, "PUT", "http://127.0.0.1:80");
+ }
+}
+
+int main(int argc, char** argv)
+{
+ vector<const char*> args;
+ argv_to_vec(argc, (const char **)argv, args);
+
+ auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT,
+ CODE_ENVIRONMENT_UTILITY, 0);
+ common_init_finish(g_ceph_context);
+
+ curl_global_init(CURL_GLOBAL_ALL);
+ ::testing::InitGoogleTest(&argc, argv);
+ int r = RUN_ALL_TESTS();
+ curl_global_cleanup();
+ return r;
+}