v8/include/cppgc/internal/compiler-specific.h
Anton Bikineev 5785d98b4b cppgc: Add initial implementation of young generation
This adds the following things:
- age table for 4K regions;
- generational barrier for mixed 4K regions;
- unmarking for major collections;
- young generation flags.

Bug: chromium:1029379
Change-Id: Ief1229f0dac5f90c5f06d3168c8ffb4b7d1f1b53
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2246566
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68379}
2020-06-17 06:48:10 +00:00

39 lines
1.0 KiB
C++

// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_
#define INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_
namespace cppgc {
#if defined(__has_attribute)
#define CPPGC_HAS_ATTRIBUTE(FEATURE) __has_attribute(FEATURE)
#else
#define CPPGC_HAS_ATTRIBUTE(FEATURE) 0
#endif
#if defined(__has_cpp_attribute)
#define CPPGC_HAS_CPP_ATTRIBUTE(FEATURE) __has_cpp_attribute(FEATURE)
#else
#define CPPGC_HAS_CPP_ATTRIBUTE(FEATURE) 0
#endif
// [[no_unique_address]] comes in C++20 but supported in clang with -std >=
// c++11.
#if CPPGC_HAS_CPP_ATTRIBUTE(no_unique_address) // NOLINTNEXTLINE
#define CPPGC_NO_UNIQUE_ADDRESS [[no_unique_address]]
#else
#define CPPGC_NO_UNIQUE_ADDRESS
#endif
#if CPPGC_HAS_ATTRIBUTE(unused) // NOLINTNEXTLINE
#define CPPGC_UNUSED __attribute__((unused))
#else
#define CPPGC_UNUSED
#endif
} // namespace cppgc
#endif // INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_