node v0.7.9 compat

There were some libuv API changes...

src/callback_info.cc

@@ -3,6 +3,7 @@
 //   http://www.bufferoverflow.ch/cgi-bin/dwww/usr/share/doc/libffi5/html/The-Closure-API.html
 
 #include <node_buffer.h>
+#include <node_version.h>
 #include "ffi.h"
 
 pthread_t          CallbackInfo::g_mainthread;
@@ -130,6 +131,13 @@ void CallbackInfo::Invoke(ffi_cif *cif, void *retval, void **parameters, void *u
   if (pthread_equal(pthread_self(), g_mainthread)) {
     DispatchToV8(info, retval, parameters);
   } else {
+    // hold the event loop open while this is executing
+#if NODE_VERSION_AT_LEAST(0, 7, 9)
+    uv_ref((uv_handle_t *)&g_async);
+#else
+    uv_ref(uv_default_loop());
+#endif
+
     // create a temporary storage area for our invokation parameters
     ThreadedCallbackInvokation *inv = new ThreadedCallbackInvokation(info, retval, parameters);
 
@@ -144,6 +152,11 @@ void CallbackInfo::Invoke(ffi_cif *cif, void *retval, void **parameters, void *u
     // wait for signal from calling thread
     inv->WaitForExecution();
 
+#if NODE_VERSION_AT_LEAST(0, 7, 9)
+    uv_unref((uv_handle_t *)&g_async);
+#else
+    uv_unref(uv_default_loop());
+#endif
     delete inv;
   }
 }
@@ -163,5 +176,9 @@ void CallbackInfo::Initialize(Handle<Object> target) {
   pthread_mutex_init(&g_queue_mutex, NULL);
 
   // allow the event loop to exit while this is running
+#if NODE_VERSION_AT_LEAST(0, 7, 9)
+  uv_unref((uv_handle_t *)&g_async);
+#else
   uv_unref(uv_default_loop());
+#endif
 }

src/threaded_callback_invokation.cc

@@ -7,11 +7,9 @@ ThreadedCallbackInvokation::ThreadedCallbackInvokation(callback_info *cbinfo, vo
 
   pthread_mutex_init(&m_mutex, NULL);
   pthread_cond_init(&m_cond, NULL);
-  uv_ref(uv_default_loop()); // hold the event loop open while this is executing
 }
 
 ThreadedCallbackInvokation::~ThreadedCallbackInvokation() {
-  uv_unref(uv_default_loop());
   pthread_cond_destroy(&m_cond);
   pthread_mutex_destroy(&m_mutex);
 }