| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include <android/fdsan.h> |
| |
| #include <errno.h> |
| #include <stdatomic.h> |
| #include <string.h> |
| #include <sys/cdefs.h> |
| #include <sys/mman.h> |
| #include <sys/resource.h> |
| #include <sys/user.h> |
| |
| struct FdEntry { |
| _Atomic(uint64_t) close_tag = 0; |
| }; |
| |
| struct FdTableOverflow { |
| size_t len = 0; |
| FdEntry entries[0]; |
| }; |
| |
| template <size_t inline_fds> |
| struct FdTableImpl { |
| constexpr FdTableImpl() {} |
| |
| uint32_t version = 0; // currently 0, and hopefully it'll stay that way. |
| _Atomic(android_fdsan_error_level) error_level = ANDROID_FDSAN_ERROR_LEVEL_DISABLED; |
| |
| FdEntry entries[inline_fds]; |
| _Atomic(FdTableOverflow*) overflow = nullptr; |
| |
| FdEntry* at(size_t idx); |
| }; |
| |
| using FdTable = FdTableImpl<128>; |