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 
12 namespace 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