1 files changed, 257 insertions, 0 deletions
diff --git a/xpcom/base/nscore.h b/xpcom/base/nscore.h
new file mode 100644
index 0000000000..8881ddf5c8
--- /dev/null
+++ b/xpcom/base/nscore.h
@@ -0,0 +1,257 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 nscore_h___
+#define nscore_h___
+
+/* Definitions of functions and operators that allocate memory. */
+#if !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
+#  include "mozilla/mozalloc.h"
+#endif
+
+/**
+ * Incorporate the integer data types which XPCOM uses.
+ */
+#include <stddef.h>  // IWYU pragma: export
+#include <stdint.h>  // IWYU pragma: export
+
+#include "mozilla/HelperMacros.h"  // IWYU pragma: export
+#include "mozilla/RefCountType.h"
+
+/* Core XPCOM declarations. */
+
+/*----------------------------------------------------------------------*/
+/* Import/export defines */
+
+#ifdef HAVE_VISIBILITY_HIDDEN_ATTRIBUTE
+#  define NS_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
+#else
+#  define NS_VISIBILITY_HIDDEN
+#endif
+
+#if defined(HAVE_VISIBILITY_ATTRIBUTE)
+#  define NS_VISIBILITY_DEFAULT __attribute__((visibility("default")))
+#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+#  define NS_VISIBILITY_DEFAULT __global
+#else
+#  define NS_VISIBILITY_DEFAULT
+#endif
+
+#define NS_HIDDEN_(type) NS_VISIBILITY_HIDDEN type
+#define NS_EXTERNAL_VIS_(type) NS_VISIBILITY_DEFAULT type
+
+#define NS_HIDDEN NS_VISIBILITY_HIDDEN
+#define NS_EXTERNAL_VIS NS_VISIBILITY_DEFAULT
+
+/**
+ * Mark a function as using a potentially non-standard function calling
+ * convention.  This can be used on functions that are called very
+ * frequently, to reduce the overhead of the function call.  It is still worth
+ * using the macro for C++ functions which take no parameters since it allows
+ * passing |this| in a register.
+ *
+ *  - Do not use this on any scriptable interface method since xptcall won't be
+ *    aware of the different calling convention.
+ *  - This must appear on the declaration, not the definition.
+ *  - Adding this to a public function _will_ break binary compatibility.
+ *  - This may be used on virtual functions but you must ensure it is applied
+ *    to all implementations - the compiler will _not_ warn but it will crash.
+ *  - This has no effect for functions which take a variable number of
+ *    arguments.
+ *  - __fastcall on windows should not be applied to class
+ *    constructors/destructors - use the NS_CONSTRUCTOR_FASTCALL macro for
+ *    constructors/destructors.
+ *
+ * Examples: int NS_FASTCALL func1(char *foo);
+ *           NS_HIDDEN_(int) NS_FASTCALL func2(char *foo);
+ */
+
+#if defined(__i386__) && defined(__GNUC__)
+#  define NS_FASTCALL __attribute__((regparm(3), stdcall))
+#  define NS_CONSTRUCTOR_FASTCALL __attribute__((regparm(3), stdcall))
+#elif defined(XP_WIN) && !defined(_WIN64)
+#  define NS_FASTCALL __fastcall
+#  define NS_CONSTRUCTOR_FASTCALL
+#else
+#  define NS_FASTCALL
+#  define NS_CONSTRUCTOR_FASTCALL
+#endif
+
+/**
+ * Various API modifiers.
+ *
+ * - NS_IMETHOD/NS_IMETHOD_: use for in-class declarations and definitions.
+ * - NS_IMETHODIMP/NS_IMETHODIMP_: use for out-of-class definitions.
+ * - NS_METHOD_: usually used in conjunction with NS_CALLBACK_. Best avoided.
+ * - NS_CALLBACK_: used in some legacy situations. Best avoided.
+ */
+
+#ifdef XP_WIN
+
+#  define NS_IMPORT __declspec(dllimport)
+#  define NS_IMPORT_(type) __declspec(dllimport) type __stdcall
+#  define NS_EXPORT __declspec(dllexport)
+#  define NS_EXPORT_(type) __declspec(dllexport) type __stdcall
+#  define NS_IMETHOD_(type) virtual type __stdcall
+#  define NS_IMETHODIMP_(type) type __stdcall
+#  define NS_METHOD_(type) type __stdcall
+#  define NS_CALLBACK_(_type, _name) _type(__stdcall* _name)
+#  ifndef _WIN64
+// Win64 has only one calling convention.  __stdcall will be ignored by the
+// compiler.
+#    define NS_STDCALL __stdcall
+#    define NS_HAVE_STDCALL
+#  else
+#    define NS_STDCALL
+#  endif
+#  define NS_FROZENCALL __cdecl
+
+#else
+
+#  define NS_IMPORT NS_EXTERNAL_VIS
+#  define NS_IMPORT_(type) NS_EXTERNAL_VIS_(type)
+#  define NS_EXPORT NS_EXTERNAL_VIS
+#  define NS_EXPORT_(type) NS_EXTERNAL_VIS_(type)
+#  define NS_IMETHOD_(type) virtual type
+#  define NS_IMETHODIMP_(type) type
+#  define NS_METHOD_(type) type
+#  define NS_CALLBACK_(_type, _name) _type(*_name)
+#  define NS_STDCALL
+#  define NS_FROZENCALL
+
+#endif
+
+#define NS_IMETHOD NS_IMETHOD_(nsresult)
+#define NS_IMETHODIMP NS_IMETHODIMP_(nsresult)
+
+/**
+ * Import/Export macros for XPCOM APIs
+ */
+
+#define EXPORT_XPCOM_API(type) type
+#define IMPORT_XPCOM_API(type) type
+#define GLUE_XPCOM_API(type) type
+
+#ifdef __cplusplus
+#  define NS_EXTERN_C extern "C"
+#else
+#  define NS_EXTERN_C
+#endif
+
+#define XPCOM_API(type) NS_EXTERN_C type
+
+/* If a program allocates memory for the lifetime of the app, it doesn't make
+ * sense to touch memory pages and free that memory at shutdown,
+ * unless we are running leak stats.
+ *
+ * Note that we're also setting this for code coverage and pgo profile
+ * generation, because both of those require atexit hooks, which won't fire
+ * if we're using _exit. Bug 1555974 covers improving this.
+ *
+ */
+#ifndef NS_FREE_PERMANENT_DATA
+#  if defined(NS_BUILD_REFCNT_LOGGING) || defined(MOZ_VALGRIND) ||            \
+      defined(MOZ_ASAN) || defined(MOZ_TSAN) || defined(MOZ_CODE_COVERAGE) || \
+      defined(MOZ_PROFILE_GENERATE) || defined(JS_STRUCTURED_SPEW)
+#    define NS_FREE_PERMANENT_DATA
+#  endif
+#endif
+
+/**
+ * NS_NO_VTABLE is emitted by xpidl in interface declarations whenever
+ * xpidl can determine that the interface can't contain a constructor.
+ * This results in some space savings and possible runtime savings -
+ * see bug 49416.  We undefine it first, as xpidl-generated headers
+ * define it for IDL uses that don't include this file.
+ */
+#ifdef NS_NO_VTABLE
+#  undef NS_NO_VTABLE
+#endif
+#if defined(_MSC_VER)
+#  define NS_NO_VTABLE __declspec(novtable)
+#else
+#  define NS_NO_VTABLE
+#endif
+
+/**
+ * Generic XPCOM result data type
+ */
+#include "nsError.h"  // IWYU pragma: export
+
+typedef MozRefCountType nsrefcnt;
+
+namespace mozilla {
+// Extensions to the mozilla::Result type for handling of nsresult values.
+//
+// Note that these specializations need to be defined before Result.h is
+// included, or we run into explicit specialization after instantiation errors,
+// especially if Result.h is used in multiple sources in a unified compile.
+
+namespace detail {
+// When used as an error value, nsresult should never be NS_OK.
+// This specialization allows us to pack Result<Ok, nsresult> into a
+// nsresult-sized value.
+template <typename T>
+struct UnusedZero;
+template <>
+struct UnusedZero<nsresult> {
+  using StorageType = nsresult;
+
+  static constexpr bool value = true;
+  static constexpr StorageType nullValue = NS_OK;
+
+  static constexpr void AssertValid(StorageType aValue) {}
+  static constexpr const nsresult& Inspect(const StorageType& aValue) {
+    return aValue;
+  }
+  static constexpr nsresult Unwrap(StorageType aValue) { return aValue; }
+  static constexpr StorageType Store(nsresult aValue) { return aValue; }
+};
+}  // namespace detail
+
+template <typename T>
+class GenericErrorResult;
+template <>
+class GenericErrorResult<nsresult>;
+
+struct Ok;
+template <typename V, typename E>
+class Result;
+
+// Allow MOZ_TRY to handle `nsresult` values.
+template <typename E = nsresult>
+inline Result<Ok, E> ToResult(nsresult aValue);
+}  // namespace mozilla
+
+/*
+ * Use these macros to do 64bit safe pointer conversions.
+ */
+
+#define NS_PTR_TO_INT32(x) ((int32_t)(intptr_t)(x))
+#define NS_PTR_TO_UINT32(x) ((uint32_t)(intptr_t)(x))
+#define NS_INT32_TO_PTR(x) ((void*)(intptr_t)(x))
+
+/*
+ * If we're being linked as standalone glue, we don't want a dynamic
+ * dependency on NSPR libs, so we skip the debug thread-safety
+ * checks, and we cannot use the THREADSAFE_ISUPPORTS macros.
+ */
+#if defined(XPCOM_GLUE) && !defined(XPCOM_GLUE_USE_NSPR)
+#  define XPCOM_GLUE_AVOID_NSPR
+#endif
+
+/*
+ * SEH exception macros.
+ */
+#ifdef HAVE_SEH_EXCEPTIONS
+#  define MOZ_SEH_TRY __try
+#  define MOZ_SEH_EXCEPT(expr) __except (expr)
+#else
+#  define MOZ_SEH_TRY if (true)
+#  define MOZ_SEH_EXCEPT(expr) else
+#endif
+
+#endif /* nscore_h___ */