Add API definition and error values for running message loops.

ppapi/cpp/dev/message_loop_dev.cc

Index: ppapi/cpp/dev/message_loop_dev.cc
diff --git a/ppapi/cpp/dev/message_loop_dev.cc b/ppapi/cpp/dev/message_loop_dev.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f212c06267f0a0f224233759e17c8f6b10dead43
--- /dev/null
+++ b/ppapi/cpp/dev/message_loop_dev.cc
@@ -0,0 +1,87 @@
+// Copyright (c) 2012 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 "ppapi/cpp/dev/message_loop_dev.h"
+
+#include "ppapi/c/dev/ppb_message_loop_dev.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module_impl.h"
+
+namespace pp {
+
+namespace {
+
+template <> const char* interface_name<PPB_MessageLoop_Dev>() {
+  return PPB_MESSAGELOOP_DEV_INTERFACE_0_1;
+}
+
+}  // namespace
+
+MessageLoop_Dev::MessageLoop_Dev() : Resource() {
+}
+
+MessageLoop_Dev::MessageLoop_Dev(Instance* instance) : Resource() {
+  if (has_interface<PPB_MessageLoop_Dev>()) {
+    PassRefFromConstructor(get_interface<PPB_MessageLoop_Dev>()->Create(
+        instance->pp_instance()));
+  }
+}
+
+MessageLoop_Dev::MessageLoop_Dev(const MessageLoop_Dev& other)
+    : Resource(other) {
+}
+
+MessageLoop_Dev::MessageLoop_Dev(PP_Resource pp_message_loop)
+    : Resource(pp_message_loop) {

[dmichael (off chromium), 2012/01/18 21:16:53]

it's a tradeoff, but you could check that pp_message_loop is a message loop, and
then either PP_NOTREACHED or set the resource to Null if it's not a message
loop. Would be nice to only do that in debug builds, though.

[brettw, 2012/01/19 03:04:44]

We have this problem for all resources. If we're going to do it, we should do it
for all of them at the same time.

+}
+
+// static
+MessageLoop_Dev MessageLoop_Dev::GetForMainThread() {
+  if (!has_interface<PPB_MessageLoop_Dev>())
+    return MessageLoop_Dev();
+  return MessageLoop_Dev(
+      get_interface<PPB_MessageLoop_Dev>()->GetForMainThread());
+}
+
+// static
+MessageLoop_Dev MessageLoop_Dev::GetCurrent() {
+  if (!has_interface<PPB_MessageLoop_Dev>())
+    return MessageLoop_Dev();
+  return MessageLoop_Dev(
+      get_interface<PPB_MessageLoop_Dev>()->GetCurrent());
+}
+
+int32_t MessageLoop_Dev::AttachToCurrentThread() {
+  if (!has_interface<PPB_MessageLoop_Dev>())
+    return PP_ERROR_NOINTERFACE;
+  return get_interface<PPB_MessageLoop_Dev>()->AttachToCurrentThread(
+      pp_resource());
+}
+
+int32_t MessageLoop_Dev::Run() {
+  if (!has_interface<PPB_MessageLoop_Dev>())
+    return PP_ERROR_NOINTERFACE;
+  return get_interface<PPB_MessageLoop_Dev>()->Run(pp_resource());
+}
+
+int32_t MessageLoop_Dev::PostWork(const CompletionCallback& callback,
+                                  int64_t delay_ms) {
+  if (!has_interface<PPB_MessageLoop_Dev>())
+    return PP_ERROR_NOINTERFACE;
+  return get_interface<PPB_MessageLoop_Dev>()->PostWork(
+      pp_resource(),
+      callback.pp_completion_callback(),
+      delay_ms);
+}
+
+int32_t MessageLoop_Dev::PostQuit(bool should_destroy) {
+  if (!has_interface<PPB_MessageLoop_Dev>())
+    return PP_ERROR_NOINTERFACE;
+  return get_interface<PPB_MessageLoop_Dev>()->PostQuit(
+      pp_resource(), PP_FromBool(should_destroy));
+}
+
+}  // namespace pp