- Fix for issue 25950 (add registration of a thread exit callback)

runtime/include/dart_api.h

Index: runtime/include/dart_api.h
diff --git a/runtime/include/dart_api.h b/runtime/include/dart_api.h
index 77d128994cc9bb26822d488000badd1ce292a21c..6665e0a010ee62ece628e7c82ad2953d58158cbe 100755
--- a/runtime/include/dart_api.h
+++ b/runtime/include/dart_api.h
@@ -721,6 +721,15 @@ typedef void (*Dart_IsolateUnhandledExceptionCallback)(Dart_Handle error);
 typedef void (*Dart_IsolateShutdownCallback)(void* callback_data);
 
 /**
+ * A thread death callback function.
+ * This callback, provided by the embedder, is called before a thread in the
+ * vm thread pool exits.
+ * This function could be used to dispose of native resources that
+ * are associated and attached to the thread, in order to avoid leaks.
+ */
+typedef void (*Dart_ThreadExitCallback)();
+
+/**
  * Callbacks provided by the embedder for file operations. If the
  * embedder does not allow file operations these callbacks can be
  * NULL.
@@ -802,6 +811,7 @@ DART_EXPORT char* Dart_Initialize(
     Dart_IsolateInterruptCallback interrupt,
     Dart_IsolateUnhandledExceptionCallback unhandled_exception,
     Dart_IsolateShutdownCallback shutdown,
+    Dart_ThreadExitCallback thread_exit,
     Dart_FileOpenCallback file_open,
     Dart_FileReadCallback file_read,
     Dart_FileWriteCallback file_write,