| /* |
| * Copyright (c) 2020 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_COMPACT_TAGGED_ATOMIC_PTR_H |
| #define PAS_COMPACT_TAGGED_ATOMIC_PTR_H |
| |
| #include "pas_compact_tagged_ptr.h" |
| #include "pas_utils.h" |
| |
| PAS_BEGIN_EXTERN_C; |
| |
| #if PAS_COMPACT_TAGGED_PTR_SIZE <= 4 |
| typedef unsigned pas_compact_tagged_atomic_ptr_impl; |
| #elif PAS_COMPACT_TAGGED_PTR_SIZE <= 8 |
| typedef uint64_t pas_compact_tagged_atomic_ptr_impl; |
| #else |
| #error "Cannot use PAS_COMPACT_TAGGED_PTR_SIZE > 8" |
| #endif |
| |
| #define PAS_COMPACT_TAGGED_ATOMIC_PTR_INITIALIZER { .payload = 0 } |
| |
| #define PAS_DEFINE_COMPACT_TAGGED_ATOMIC_PTR(type, name) \ |
| struct name; \ |
| typedef struct name name; \ |
| \ |
| struct name { \ |
| pas_compact_tagged_atomic_ptr_impl payload; \ |
| }; \ |
| \ |
| PAS_DEFINE_COMPACT_TAGGED_PTR_HELPERS(type, name); \ |
| \ |
| static inline void name ## _store(name* ptr, type value) \ |
| { \ |
| ptr->payload = (pas_compact_tagged_atomic_ptr_impl)name ## _offset_for_ptr(value); \ |
| } \ |
| \ |
| static inline type name ## _load(name* ptr) \ |
| { \ |
| return name ## _ptr_for_offset(ptr->payload); \ |
| } \ |
| \ |
| static inline type name ## _load_non_null(name* ptr) \ |
| { \ |
| return name ## _ptr_for_offset_non_null(ptr->payload); \ |
| } \ |
| \ |
| static inline bool name ## _is_null(name* ptr) \ |
| { \ |
| return !ptr->payload; \ |
| } \ |
| \ |
| static inline type name ## _load_remote(pas_enumerator* enumerator, name* ptr) \ |
| { \ |
| return name ## _ptr_for_remote_offset(enumerator, ptr->payload); \ |
| } \ |
| \ |
| struct pas_dummy |
| |
| PAS_END_EXTERN_C; |
| |
| #endif /* PAS_COMPACT_TAGGED_ATOMIC_PTR_H */ |
| |