| /* |
| * Copyright (c) 2019 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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 APPLE INC. ``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 APPLE INC. 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. |
| */ |
| |
| #ifndef PAS_SEGREGATED_VIEW_KIND_H |
| #define PAS_SEGREGATED_VIEW_KIND_H |
| |
| #include "pas_utils.h" |
| |
| PAS_BEGIN_EXTERN_C; |
| |
| enum pas_segregated_view_kind { |
| pas_segregated_exclusive_view_kind, |
| pas_segregated_ineligible_exclusive_view_kind, /* Really the same type as exclusive_view, but this |
| lets us use the kind bits of a view to say if |
| eligibility has been noted. */ |
| pas_segregated_shared_view_kind, |
| pas_segregated_shared_handle_kind, |
| pas_segregated_partial_view_kind, |
| pas_segregated_size_directory_view_kind |
| }; |
| |
| typedef enum pas_segregated_view_kind pas_segregated_view_kind; |
| |
| #define PAS_SEGREGATED_VIEW_KIND_MASK ((uintptr_t)7) |
| |
| static inline char pas_segregated_view_kind_get_character_code(pas_segregated_view_kind kind) |
| { |
| switch (kind) { |
| case pas_segregated_exclusive_view_kind: |
| case pas_segregated_ineligible_exclusive_view_kind: |
| return 'E'; |
| case pas_segregated_shared_view_kind: |
| return 'S'; |
| case pas_segregated_shared_handle_kind: |
| return 'H'; |
| case pas_segregated_partial_view_kind: |
| return 'P'; |
| case pas_segregated_size_directory_view_kind: |
| return 'S'; |
| } |
| PAS_ASSERT(!"Should not be reached"); |
| return 0; |
| } |
| |
| static inline const char* pas_segregated_view_kind_get_string(pas_segregated_view_kind kind) |
| { |
| switch (kind) { |
| case pas_segregated_exclusive_view_kind: |
| return "exclusive_view"; |
| case pas_segregated_ineligible_exclusive_view_kind: |
| return "ineligible_exclusive_view"; |
| case pas_segregated_shared_view_kind: |
| return "shared_view"; |
| case pas_segregated_shared_handle_kind: |
| return "shared_handle"; |
| case pas_segregated_partial_view_kind: |
| return "partial_view"; |
| case pas_segregated_size_directory_view_kind: |
| return "size_directory"; |
| } |
| PAS_ASSERT(!"Should not be reached"); |
| return NULL; |
| } |
| |
| static inline bool pas_segregated_view_kind_is_some_exclusive(pas_segregated_view_kind kind) |
| { |
| return kind <= pas_segregated_ineligible_exclusive_view_kind; |
| } |
| |
| static inline bool pas_segregated_view_kind_can_become_empty(pas_segregated_view_kind kind) |
| { |
| switch (kind) { |
| case pas_segregated_exclusive_view_kind: |
| case pas_segregated_ineligible_exclusive_view_kind: |
| case pas_segregated_shared_view_kind: |
| return true; |
| case pas_segregated_partial_view_kind: |
| return false; |
| case pas_segregated_shared_handle_kind: |
| case pas_segregated_size_directory_view_kind: |
| PAS_ASSERT(!"Should not be reached"); |
| return false; |
| } |
| PAS_ASSERT(!"Should not be reached"); |
| return false; |
| } |
| |
| PAS_END_EXTERN_C; |
| |
| #endif /* PAS_SEGREGATED_VIEW_KIND_H */ |
| |