Separate mojo/shell into a runner and the application manager (shell)

mojo/shell/native_application_support.cc

-// 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.
-
-#include "mojo/shell/native_application_support.h"
-
-#include "base/command_line.h"
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/logging.h"
-#include "mojo/public/platform/native/gles2_impl_chromium_miscellaneous_thunks.h"
-#include "mojo/public/platform/native/gles2_impl_chromium_sub_image_thunks.h"
-#include "mojo/public/platform/native/gles2_impl_chromium_sync_point_thunks.h"
-#include "mojo/public/platform/native/gles2_impl_chromium_texture_mailbox_thunks.h"
-#include "mojo/public/platform/native/gles2_impl_occlusion_query_ext_thunks.h"
-#include "mojo/public/platform/native/gles2_impl_thunks.h"
-#include "mojo/public/platform/native/gles2_thunks.h"
-#include "mojo/public/platform/native/system_thunks.h"
-
-namespace mojo {
-namespace shell {
-
-namespace {
-
-template <typename Thunks>
-bool SetThunks(Thunks (*make_thunks)(),
-               const char* function_name,
-               base::NativeLibrary library) {
-  typedef size_t (*SetThunksFn)(const Thunks* thunks);
-  SetThunksFn set_thunks = reinterpret_cast<SetThunksFn>(
-      base::GetFunctionPointerFromNativeLibrary(library, function_name));
-  if (!set_thunks)
-    return false;
-  Thunks thunks = make_thunks();
-  size_t expected_size = set_thunks(&thunks);
-  if (expected_size > sizeof(Thunks)) {
-    LOG(ERROR) << "Invalid app library: expected " << function_name
-               << " to return thunks of size: " << expected_size;
-    return false;
-  }
-  return true;
-}
-
-}  // namespace
-
-base::NativeLibrary LoadNativeApplication(const base::FilePath& app_path,
-                                          NativeApplicationCleanup cleanup) {
-  DVLOG(2) << "Loading Mojo app in process from library: " << app_path.value();
-
-  base::NativeLibraryLoadError error;
-  base::NativeLibrary app_library = base::LoadNativeLibrary(app_path, &error);
-  if (cleanup == NativeApplicationCleanup::DELETE)
-    DeleteFile(app_path, false);
-  LOG_IF(ERROR, !app_library)
-      << "Failed to load app library (error: " << error.ToString() << ")";
-  return app_library;
-}
-
-bool RunNativeApplication(base::NativeLibrary app_library,
-                          InterfaceRequest<Application> application_request) {
-  // Tolerate |app_library| being null, to make life easier for callers.
-  if (!app_library)
-    return false;
-
-  if (!SetThunks(&MojoMakeSystemThunks, "MojoSetSystemThunks", app_library)) {
-    LOG(ERROR) << "MojoSetSystemThunks not found";
-    return false;
-  }
-
-  if (SetThunks(&MojoMakeGLES2ControlThunks, "MojoSetGLES2ControlThunks",
-                app_library)) {
-    // If we have the control thunks, we should also have the GLES2
-    // implementation thunks.
-    if (!SetThunks(&MojoMakeGLES2ImplThunks, "MojoSetGLES2ImplThunks",
-                   app_library)) {
-      LOG(ERROR)
-          << "MojoSetGLES2ControlThunks found, but not MojoSetGLES2ImplThunks";
-      return false;
-    }
-
-    // If the application is using GLES2 extension points, register those
-    // thunks. Applications may use or not use any of these, so don't warn if
-    // they are missing.
-    SetThunks(MojoMakeGLES2ImplChromiumMiscellaneousThunks,
-              "MojoSetGLES2ImplChromiumMiscellaneousThunks", app_library);
-    SetThunks(MojoMakeGLES2ImplChromiumSubImageThunks,
-              "MojoSetGLES2ImplChromiumSubImageThunks", app_library);
-    SetThunks(MojoMakeGLES2ImplChromiumTextureMailboxThunks,
-              "MojoSetGLES2ImplChromiumTextureMailboxThunks", app_library);
-    SetThunks(MojoMakeGLES2ImplChromiumSyncPointThunks,
-              "MojoSetGLES2ImplChromiumSyncPointThunks", app_library);
-    SetThunks(MojoMakeGLES2ImplOcclusionQueryExtThunks,
-              "MojoSetGLES2ImplOcclusionQueryExtThunks", app_library);
-  }
-  // Unlike system thunks, we don't warn on a lack of GLES2 thunks because
-  // not everything is a visual app.
-
-  // Go shared library support requires us to initialize the runtime before we
-  // start running any go code. This is a temporary patch.
-  typedef void (*InitGoRuntimeFn)();
-  InitGoRuntimeFn init_go_runtime = reinterpret_cast<InitGoRuntimeFn>(
-      base::GetFunctionPointerFromNativeLibrary(app_library, "InitGoRuntime"));
-  if (init_go_runtime) {
-    DVLOG(2) << "InitGoRuntime: Initializing Go Runtime found in app";
-    init_go_runtime();
-  }
-
-#if !defined(OS_WIN)
-  // On Windows, initializing base::CommandLine with null parameters gets the
-  // process's command line from the OS. Other platforms need it to be passed
-  // in. This needs to be passed in before the app initializes the command line,
-  // which is done as soon as it loads.
-  typedef void (*InitCommandLineArgs)(int, const char* const*);
-  InitCommandLineArgs init_command_line_args =
-      reinterpret_cast<InitCommandLineArgs>(
-          base::GetFunctionPointerFromNativeLibrary(app_library,
-                                                    "InitCommandLineArgs"));
-  if (init_command_line_args) {
-    int argc = 0;
-    base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
-    const char** argv = new const char* [cmd_line->argv().size()];
-    for (auto& arg : cmd_line->argv())
-      argv[argc++] = arg.c_str();
-    init_command_line_args(argc, argv);
-  }
-#endif
-
-  typedef MojoResult (*MojoMainFunction)(MojoHandle);
-  MojoMainFunction main_function = reinterpret_cast<MojoMainFunction>(
-      base::GetFunctionPointerFromNativeLibrary(app_library, "MojoMain"));
-  if (!main_function) {
-    LOG(ERROR) << "MojoMain not found";
-    return false;
-  }
-  // |MojoMain()| takes ownership of the service handle.
-  MojoHandle handle = application_request.PassMessagePipe().release().value();
-  MojoResult result = main_function(handle);
-  if (result != MOJO_RESULT_OK) {
-    LOG(ERROR) << "MojoMain returned error (result: " << result << ")";
-  }
-  return true;
-}
-
-}  // namespace shell
-}  // namespace mojo