Asynchronously pre-fault the native library pages.

third_party/android_crazy_linker/src/include/crazy_linker.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CRAZY_LINKER_H
 #define CRAZY_LINKER_H
 
 // This is the crazy linker, a custom dynamic linker that can be used
 // by NDK applications to load shared libraries (not executables) with
 // a twist.
@@ skipping 343 matching lines @@
 
 // Return the full path of |lib_name| in the zip file
 // (lib/<abi>/crazy.<lib_name>). The result is returned in
 // |buffer[0..buffer_size - 1]|. If |buffer_size| is too small,
 // CRAZY_STATUS_FAILURE is returned.
 crazy_status_t crazy_library_file_path_in_zip_file(const char* lib_name,
                                                    char* buffer,
                                                    size_t buffer_size)
     _CRAZY_PUBLIC;
 
+
+// Return the offset and size of a library stored in the zip file;
+crazy_status_t crazy_library_offset_size_in_zip_file(const char* zip_filename,
+                                                     const char* lib_name,
+                                                     int* offset, int* size)
+    _CRAZY_PUBLIC;
+
+// Fault a library in memory.
+// |filename| file to fault in.
+// |offset| start offset in the file.
+// |size| size of the file section to consider. -1 for the whole file.
+crazy_status_t crazy_prefault_library(const char* filename, int offset,
+                                      int size) _CRAZY_PUBLIC;
+
 // Check whether |lib_name| is page aligned and uncompressed in |zipfile_name|.
 crazy_status_t crazy_linker_check_library_is_mappable_in_zip_file(
     const char* zipfile_name,
     const char* lib_name) _CRAZY_PUBLIC;
 
 // Close a library. This decrements its reference count. If it reaches
 // zero, the library be unloaded from the process.
 void crazy_library_close(crazy_library_t* library) _CRAZY_PUBLIC;
 
 // Close a library, with associated context to support delayed operations.
 void crazy_library_close_with_context(crazy_library_t* library,
                                       crazy_context_t* context) _CRAZY_PUBLIC;
 
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
 
 #endif /* CRAZY_LINKER_H */