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Diffstat (limited to '')
-rw-r--r-- | dom/media/doctor/DDLoggedTypeTraits.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/dom/media/doctor/DDLoggedTypeTraits.h b/dom/media/doctor/DDLoggedTypeTraits.h new file mode 100644 index 0000000000..2c9de4dbc5 --- /dev/null +++ b/dom/media/doctor/DDLoggedTypeTraits.h @@ -0,0 +1,104 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef DDLoggedTypeTraits_h_ +#define DDLoggedTypeTraits_h_ + +#include <type_traits> + +namespace mozilla { + +// Templated struct carrying compile-time information about C++ types that may +// log messages (including about their lifetime and links to other objects.) +// Classes should declare a specialization by using one of the macros below. +template <typename T> +struct DDLoggedTypeTraits; + +#define DDLoggedTypeName(TYPE) \ + template <> \ + struct DDLoggedTypeTraits<TYPE> { \ + using Type = TYPE; \ + static constexpr const char* Name() { return #TYPE; } \ + using HasBase = std::false_type; \ + using BaseType = TYPE; \ + static constexpr const char* BaseTypeName() { return ""; } \ + } + +#define DDLoggedTypeNameAndBase(TYPE, BASE) \ + template <> \ + struct DDLoggedTypeTraits<TYPE> { \ + using Type = TYPE; \ + static constexpr const char* Name() { return #TYPE; } \ + using HasBase = std::true_type; \ + using BaseType = BASE; \ + static constexpr const char* BaseTypeName() { \ + return DDLoggedTypeTraits<BASE>::Name(); \ + } \ + } + +#define DDLoggedTypeCustomName(TYPE, NAME) \ + template <> \ + struct DDLoggedTypeTraits<TYPE> { \ + using Type = TYPE; \ + static constexpr const char* Name() { return #NAME; } \ + using HasBase = std::false_type; \ + using BaseType = TYPE; \ + static constexpr const char* BaseTypeName() { return ""; } \ + } + +#define DDLoggedTypeCustomNameAndBase(TYPE, NAME, BASE) \ + template <> \ + struct DDLoggedTypeTraits<TYPE> { \ + using Type = TYPE; \ + static constexpr const char* Name() { return #NAME; } \ + using HasBase = std::true_type; \ + using BaseType = BASE; \ + static constexpr const char* BaseTypeName() { \ + return DDLoggedTypeTraits<BASE>::Name(); \ + } \ + } + +// Variants with built-in forward-declaration, will only work +// - in mozilla namespace, +// - with unqualified mozilla-namespace type names. +#define DDLoggedTypeDeclName(TYPE) \ + class TYPE; \ + DDLoggedTypeName(TYPE); +#define DDLoggedTypeDeclNameAndBase(TYPE, BASE) \ + class TYPE; \ + DDLoggedTypeNameAndBase(TYPE, BASE); +#define DDLoggedTypeDeclCustomName(TYPE, NAME) \ + class TYPE; \ + DDLoggedTypeCustomName(TYPE, NAME); +#define DDLoggedTypeDeclCustomNameAndBase(TYPE, NAME, BASE) \ + class TYPE; \ + DDLoggedTypeCustomNameAndBase(TYPE, NAME, BASE); + +} // namespace mozilla + +// Some essential types that live outside of the media stack. +class nsPIDOMWindowInner; +class nsPIDOMWindowOuter; + +namespace mozilla { + +namespace dom { +class Document; +class HTMLAudioElement; +class HTMLMediaElement; +class HTMLVideoElement; +} // namespace dom + +DDLoggedTypeName(nsPIDOMWindowInner); +DDLoggedTypeName(nsPIDOMWindowOuter); +DDLoggedTypeName(dom::Document); +DDLoggedTypeName(dom::HTMLMediaElement); +DDLoggedTypeNameAndBase(dom::HTMLAudioElement, dom::HTMLMediaElement); +DDLoggedTypeNameAndBase(dom::HTMLVideoElement, dom::HTMLMediaElement); + +} // namespace mozilla + +#endif // DDLoggedTypeTraits_h_ |