Add support for startup data (snapshot) compression.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 4ab1ec2b4f8c54c83f36f4ee2ecd53ddec1be599..3c496161a5e7f0e8a2ad0658d7f88cbcbdac3ea1 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2641,6 +2641,15 @@ class V8EXPORT Isolate {
 };
 
 
+class StartupData {
+ public:
+  int id;

[Søren Thygesen Gjesse, 2011/04/29 06:50:29]

Is this id actually required?

[mnaganov (inactive), 2011/04/29 12:07:58]

I think, no. As we don't expose to embedder what those ids mean, they make no
sense.

+  const char* data;
+  int compressed_size;
+  int decompressed_size;

[Søren Thygesen Gjesse, 2011/04/29 06:50:29]

Should the compression algorithm be exposed here (enum or string)?

[mnaganov (inactive), 2011/04/29 12:07:58]

Makes sense. But not for every resource, as it is the same for all of them. I've
added another API function for returning it.

+};
+
+
 /**
  * Container class for static utility functions.
  */
@@ -2670,6 +2679,25 @@ class V8EXPORT V8 {
   static bool IsDead();
 
   /**
+   * The following 3 functions are to be used when V8 is built with

[Søren Thygesen Gjesse, 2011/04/29 06:50:29]

with -> with the

[mnaganov (inactive), 2011/04/29 12:07:58]

Done.

+   * 'compress_startup_data' flag enabled. In this case, the embedder
+   * must decompress startup data prior to initializing V8.
+   *
+   * This is how interaction with V8 should look like:
+   *   int compressed_data_count = v8::V8::GetCompressedStartupDataCount();
+   *   v8::StartupData* compressed_data =
+   *     new v8::StartupData[compressed_data_count];
+   *   v8::V8::GetCompressedStartupData(compressed_data);
+   *   ... decompress data (compressed_data can be updated in-place) ...
+   *   v8::V8::SetDecompressedStartupData(compressed_data);
+   *   ... now V8 can be initialized
+   *   ... make sure the decompressed data stays valid until V8 shutdown
+   */
+  static int GetCompressedStartupDataCount();
+  static void GetCompressedStartupData(StartupData* compressed_data);
+  static void SetDecompressedStartupData(StartupData* decompressed_data);
+
+  /**
    * Adds a message listener.
    *
    * The same message listener can be added more than once and it that