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mojo/shell/native_application_support.cc

Index: mojo/shell/native_application_support.cc
diff --git a/mojo/shell/native_application_support.cc b/mojo/shell/native_application_support.cc
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+// 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/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();
+  }
+
+  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