Add debugging of mutexes (#1470)

When DEBUG defined it will used timed locks which will log when held
too long along with where.

libfuse/lib/node.cpp

@@ -0,0 +1,60 @@
+#include "node.hpp"
+
+#include "lfmp.h"
+
+static lfmp_t g_NODE_FMP;
+
+static
+__attribute__((constructor))
+void
+node_constructor()
+{
+  lfmp_init(&g_NODE_FMP,sizeof(node_t),256);
+}
+
+static
+__attribute__((destructor))
+void
+node_destructor()
+{
+  lfmp_destroy(&g_NODE_FMP);
+}
+
+node_t*
+node_alloc()
+{
+  return (node_t*)lfmp_calloc(&g_NODE_FMP);
+}
+
+void
+node_free(node_t *node_)
+{
+  lfmp_free(&g_NODE_FMP,node_);
+}
+
+int
+node_gc1()
+{
+  return lfmp_gc(&g_NODE_FMP);
+}
+
+void
+node_gc()
+{
+  int rv;
+  int fails;
+
+  fails = 0;
+  do
+    {
+      rv = node_gc1();
+      if(rv == 0)
+        fails++;
+    } while(rv || (fails < 3));
+}
+
+lfmp_t*
+node_lfmp()
+{
+  return &g_NODE_FMP;
+}