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macros.h
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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
11
12namespace cppgc {
13
14#define CPPGC_DISALLOW_NEW() \
15 public: \
16 using IsDisallowNewMarker CPPGC_UNUSED = int; \
17 void* operator new(size_t, void* location) { return location; } \
18 void* operator new(size_t) = delete; \
19 static_assert(true, "Force semicolon.")
20
21// Use CPPGC_STACK_ALLOCATED if the object is only stack allocated.
22// Add the CPPGC_STACK_ALLOCATED_IGNORE annotation on a case-by-case basis when
23// enforcement of CPPGC_STACK_ALLOCATED should be suppressed.
24#if defined(__clang__)
25
26#define CPPGC_STACK_ALLOCATED() \
27 public: \
28 using IsStackAllocatedTypeMarker CPPGC_UNUSED = int; \
29 \
30 private: \
31 void* operator new(size_t) = delete; \
32 void* operator new(size_t, void*) = delete; \
33 static_assert(true, "Force semicolon.")
34
35#define CPPGC_STACK_ALLOCATED_IGNORE(bug_or_reason) \
36 __attribute__((annotate("stack_allocated_ignore")))
37
38#define CPPGC_PLUGIN_IGNORE(bug_or_reason) \
39 __attribute__((annotate("blink_gc_plugin_ignore"), \
40 annotate("stack_allocated_ignore")))
41
42#else // !defined(__clang__)
43
44#define CPPGC_STACK_ALLOCATED() static_assert(true, "Force semicolon.")
45#define CPPGC_STACK_ALLOCATED_IGNORE(bug_or_reason)
46#define CPPGC_PLUGIN_IGNORE(bug_or_reason)
47
48#endif // !defined(__clang__)
49
50template <typename T>
52 requires { typename T::IsStackAllocatedTypeMarker; };
53
54} // namespace cppgc
55
56#endif // INCLUDE_CPPGC_MACROS_H_
Definition: macros.h:51
Definition: allocation.h:38