Feature: Added most basic ping infrastructure

src/main.c

@@ -82,6 +82,7 @@
 #include "yp.h"
 #include "auth.h"
 #include "event.h"
+#include "ping.h"
 #include "listensocket.h"
 #include "fastevent.h"
 #include "prng.h"
@@ -169,6 +170,7 @@ static void initialize_subsystems(void)
     xslt_initialize();
 #ifdef HAVE_CURL
     icecast_curl_initialize();
+    ping_initialize();
 #endif
 }
 
@@ -182,6 +184,9 @@ static void shutdown_subsystems(void)
     auth_shutdown();
     yp_shutdown();
     stats_shutdown();
+#ifdef HAVE_CURL
+    ping_shutdown();
+#endif
 
     ICECAST_LOG_DEBUG("Shuting down connection related subsystems...");
     connection_shutdown();

src/ping.c

@@ -11,4 +11,51 @@
 #include <config.h>
 #endif
 
+#include <stdbool.h>
+
+#include "thread/thread.h"
+
 #include "ping.h"
+#include "logging.h"
+#include "curl.h"
+
+#define CATMODULE "ping"
+
+static bool ping_running = false;
+static thread_type *_ping_thread_id;
+static mutex_t _ping_mutex;
+
+static void *_ping_thread(void *arg)
+{
+    CURLM *curl_multi = curl_multi_init();
+
+    while (ping_running) {
+        break;
+    }
+
+    curl_multi_cleanup(curl_multi);
+
+    return NULL;
+}
+
+void ping_initialize(void)
+{
+    if (ping_running)
+        return;
+
+    thread_mutex_create(&_ping_mutex);
+
+    ping_running = true;
+    _ping_thread_id = thread_create("Ping Thread", _ping_thread, NULL, THREAD_ATTACHED);
+}
+
+void ping_shutdown(void)
+{
+    if (!ping_running)
+        return;
+
+    ping_running = false;
+    ICECAST_LOG_DEBUG("waiting for ping thread");
+    thread_join(_ping_thread_id);
+    thread_mutex_destroy(&_ping_mutex);
+}

src/ping.h

@@ -9,4 +9,7 @@
 #ifndef __PING_H__
 #define __PING_H__
 
+void ping_initialize(void);
+void ping_shutdown(void);
+
 #endif  /* __PING_H__ */