Moved the server-specific files into src/server

src/server/flexthread.h

@@ -0,0 +1,29 @@
+#ifndef FLEXTHREAD_H
+#define FLEXTHREAD_H
+
+#include <pthread.h>
+
+/* Define a mutex wrapper object.  This wrapper allows us to easily
+ * track whether or not we currently hold the wrapped mutex.  If we hold
+ * the mutex when we destroy it, then we first release it.
+ *
+ * These are specifically for the case where an ERROR_* handler gets
+ * called when we might (or might not) have a mutex held.  The
+ * flexthread_mutex_held() function will tell you if your thread
+ * currently holds the given mutex.  It's not safe to make any other
+ * comparisons.
+ */
+
+struct flexthread_mutex {
+	pthread_mutex_t mutex;
+	pthread_t holder;
+};
+
+struct flexthread_mutex * flexthread_mutex_create(void);
+void flexthread_mutex_destroy( struct flexthread_mutex * );
+
+int flexthread_mutex_lock( struct flexthread_mutex * );
+int flexthread_mutex_unlock( struct flexthread_mutex * );
+int flexthread_mutex_held( struct flexthread_mutex * );
+
+#endif