1// Copyright 2020 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef INCLUDE_CPPGC_MACROS_H_
6#define INCLUDE_CPPGC_MACROS_H_
7
8#include <cstddef>
9
10#include "cppgc/internal/compiler-specific.h"
11
12namespace cppgc {
13
14// Use CPPGC_STACK_ALLOCATED if the object is only stack allocated.
15// Add the CPPGC_STACK_ALLOCATED_IGNORE annotation on a case-by-case basis when
16// enforcement of CPPGC_STACK_ALLOCATED should be suppressed.
17#if defined(__clang__)
18#define CPPGC_STACK_ALLOCATED()                        \
19 public:                                               \
20  using IsStackAllocatedTypeMarker CPPGC_UNUSED = int; \
21                                                       \
22 private:                                              \
23  void* operator new(size_t) = delete;                 \
24  void* operator new(size_t, void*) = delete;          \
25  static_assert(true, "Force semicolon.")
26#define CPPGC_STACK_ALLOCATED_IGNORE(bug_or_reason) \
27  __attribute__((annotate("stack_allocated_ignore")))
28#else  // !defined(__clang__)
29#define CPPGC_STACK_ALLOCATED() static_assert(true, "Force semicolon.")
30#define CPPGC_STACK_ALLOCATED_IGNORE(bug_or_reason)
31#endif  // !defined(__clang__)
32
33}  // namespace cppgc
34
35#endif  // INCLUDE_CPPGC_MACROS_H_
36