Only reload libraries when they may have been modified.

runtime/include/dart_api.h

 /*
  * Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
  * for details. All rights reserved. Use of this source code is governed by a
  * BSD-style license that can be found in the LICENSE file.
  */
 
 #ifndef INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
@@ skipping 2697 matching lines @@
  * embedded in another file, for example in an html file.
  *
  * TODO(turnidge): Document.
  *
  * \param line_offset is the number of text lines before the
  *   first line of the Dart script in the containing file.
  *
  * \param col_offset is the number of characters before the first character
  *   in the first line of the Dart script.
  */
 DART_EXPORT Dart_Handle Dart_LoadScript(Dart_Handle url,

[Cutch, 2016/07/29 14:37:03]

update API documentation for these methods?

[turnidge, 2016/07/29 17:37:37]

Done, and then some.  I decided to finally write some documentation for the
LibraryTagHandler in general.

+                                        Dart_Handle resolved_url,
                                         Dart_Handle source,
                                         intptr_t line_offset,
                                         intptr_t col_offset);
 
 /**
  * Loads the root script for current isolate from a snapshot.
  *
  * \param buffer A buffer which contains a snapshot of the script.
  * \param length Length of the passed in buffer.
  *
@@ skipping 73 matching lines @@
  *
  * \return If the VM handles the error, the return value is
  * a null handle. If it doesn't handle the error, the error
  * object is returned.
  */
 DART_EXPORT Dart_Handle Dart_LibraryHandleError(Dart_Handle library,
                                                 Dart_Handle error);
 
 
 DART_EXPORT Dart_Handle Dart_LoadLibrary(Dart_Handle url,
+                                         Dart_Handle resolved_url,
                                          Dart_Handle source,
                                          intptr_t line_offset,
                                          intptr_t column_offset);
 
 /**
  * Imports a library into another library, optionally with a prefix.
  * If no prefix is required, an empty string or Dart_Null() can be
  * supplied.
  *
  * \param library The library into which to import another library.
@@ skipping 10 matching lines @@
  * Loads a source string into a library.
  *
  * \param library A library
  * \param url A url identifying the origin of the source
  * \param source A string of Dart source
  *
  * \return A valid handle if no error occurs during the operation.
  */
 DART_EXPORT Dart_Handle Dart_LoadSource(Dart_Handle library,
                                         Dart_Handle url,
+                                        Dart_Handle resolved_url,
                                         Dart_Handle source,
                                         intptr_t line_offset,
                                         intptr_t column_offset);
 /* TODO(turnidge): Rename to Dart_LibraryLoadSource? */
 
 
 /**
  * Loads a patch source string into a library.
  *
  * \param library A library
@@ skipping 219 matching lines @@
 /**
  *  Returns whether the VM was initialized with a precompiled snapshot. Only
  *  valid after Dart_Initialize.
  *  DEPRECATED. This is currently used to disable Platform.executable and
  *  Platform.resolvedExecutable under precompilation to prevent process
  *  spawning tests from becoming fork-bombs.
  */
 DART_EXPORT bool Dart_IsRunningPrecompiledCode();
 
 #endif  /* INCLUDE_DART_API_H_ */  /* NOLINT */