| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| #ifndef __ASSEMBLER__ |
| |
| #if !defined(__GNUC__) && !defined(__clang__) |
| #error "Unrecognized compiler!" |
| #endif |
| |
| #define likely(x) __builtin_expect(!!(x), 1) |
| #define unlikely(x) __builtin_expect(!!(x), 0) |
| #define __UNUSED __attribute__((__unused__)) |
| #define __USED __attribute__((__used__)) |
| #define __PACKED __attribute__((packed)) |
| #define __ALIGNED(x) __attribute__((aligned(x))) |
| #define __PRINTFLIKE(__fmt,__varargs) __attribute__((__format__ (__printf__, __fmt, __varargs))) |
| #define __SCANFLIKE(__fmt,__varargs) __attribute__((__format__ (__scanf__, __fmt, __varargs))) |
| #define __SECTION(x) __attribute__((__section__(x))) |
| #define __PURE __attribute__((__pure__)) |
| #define __CONST __attribute__((__const__)) |
| #define __NO_RETURN __attribute__((__noreturn__)) |
| #define __MALLOC __attribute__((__malloc__)) |
| #define __WEAK __attribute__((__weak__)) |
| #define __GNU_INLINE __attribute__((__gnu_inline__)) |
| #define __GET_CALLER(x) __builtin_return_address(0) |
| #define __GET_FRAME(x) __builtin_frame_address(0) |
| #define __NAKED __attribute__((__naked__)) |
| #define __ISCONSTANT(x) __builtin_constant_p(x) |
| #define __NO_INLINE __attribute__((__noinline__)) |
| #define __SRAM __NO_INLINE __SECTION(".sram.text") |
| #define __CONSTRUCTOR __attribute__((__constructor__)) |
| #define __DESTRUCTOR __attribute__((__destructor__)) |
| #define __RESTRICT __restrict |
| |
| #ifndef __clang__ |
| #define __LEAF_FN __attribute__((__leaf__)) |
| #define __OPTIMIZE(x) __attribute__((__optimize__(x))) |
| #define __EXTERNALLY_VISIBLE __attribute__((__externally_visible__)) |
| #define __THREAD_ANNOTATION(x) |
| #define __NO_SAFESTACK |
| #else |
| #define __LEAF_FN |
| #define __OPTIMIZE(x) |
| #define __EXTERNALLY_VISIBLE |
| #define __THREAD_ANNOTATION(x) __attribute__((x)) |
| #define __NO_SAFESTACK __attribute__((__no_sanitize__("safe-stack"))) |
| #endif |
| |
| #ifndef __has_feature |
| #define __has_feature(x) 0 |
| #endif |
| |
| #define __ALWAYS_INLINE __attribute__((__always_inline__)) |
| #define __MAY_ALIAS __attribute__((__may_alias__)) |
| #define __NONNULL(x) __attribute__((__nonnull__ x)) |
| #define __WARN_UNUSED_RESULT __attribute__((__warn_unused_result__)) |
| #define __UNREACHABLE __builtin_unreachable() |
| #define __WEAK_ALIAS(x) __attribute__((__weak__, __alias__(x))) |
| #define __ALIAS(x) __attribute__((__alias__(x))) |
| #define __EXPORT __attribute__ ((__visibility__("default"))) |
| #define __LOCAL __attribute__ ((__visibility__("hidden"))) |
| #define __THREAD __thread |
| #define __offsetof(type, field) __builtin_offsetof(type, field) |
| |
| #if defined(__cplusplus) && __cplusplus >= 201703L |
| #define __FALLTHROUGH [[fallthrough]] |
| #elif defined(__cplusplus) && defined(__clang__) |
| #define __FALLTHROUGH [[clang::fallthrough]] |
| #elif __GNUC__ >= 7 |
| #define __FALLTHROUGH __attribute__((__fallthrough__)) |
| #else |
| #define __FALLTHROUGH do {} while (0) |
| #endif |
| |
| // Publicly exposed thread annotation macros. These have a long and ugly name to |
| // minimize the chance of collision with consumers of Zircon's public headers. |
| #define __TA_CAPABILITY(x) __THREAD_ANNOTATION(__capability__(x)) |
| #define __TA_GUARDED(x) __THREAD_ANNOTATION(__guarded_by__(x)) |
| #define __TA_ACQUIRE(...) __THREAD_ANNOTATION(__acquire_capability__(__VA_ARGS__)) |
| #define __TA_TRY_ACQUIRE(...) __THREAD_ANNOTATION(__try_acquire_capability__(__VA_ARGS__)) |
| #define __TA_ACQUIRED_BEFORE(...) __THREAD_ANNOTATION(__acquired_before__(__VA_ARGS__)) |
| #define __TA_ACQUIRED_AFTER(...) __THREAD_ANNOTATION(__acquired_after__(__VA_ARGS__)) |
| #define __TA_RELEASE(...) __THREAD_ANNOTATION(__release_capability__(__VA_ARGS__)) |
| #define __TA_REQUIRES(...) __THREAD_ANNOTATION(__requires_capability__(__VA_ARGS__)) |
| #define __TA_EXCLUDES(...) __THREAD_ANNOTATION(__locks_excluded__(__VA_ARGS__)) |
| #define __TA_RETURN_CAPABILITY(x) __THREAD_ANNOTATION(__lock_returned__(x)) |
| #define __TA_SCOPED_CAPABILITY __THREAD_ANNOTATION(__scoped_lockable__) |
| #define __TA_NO_THREAD_SAFETY_ANALYSIS __THREAD_ANNOTATION(__no_thread_safety_analysis__) |
| |
| #endif // ifndef __ASSEMBLER__ |
| |
| #if !defined(__DEPRECATE) |
| #define __DEPRECATE __attribute__((__deprecated__)) |
| #endif |
| |
| /* TODO: add type check */ |
| #if !defined(countof) |
| #define countof(a) (sizeof(a) / sizeof((a)[0])) |
| #endif |
| |
| /* CPP header guards */ |
| #ifdef __cplusplus |
| #define __BEGIN_CDECLS extern "C" { |
| #define __END_CDECLS } |
| #else |
| #define __BEGIN_CDECLS |
| #define __END_CDECLS |
| #endif |
| |
| // constexpr annotation for use in static inlines usable in both C and C++ |
| #ifdef __cplusplus |
| #define __CONSTEXPR constexpr |
| #else |
| #define __CONSTEXPR |
| #endif |
| |
| #define add_overflow(a, b, c) __builtin_add_overflow(a, b, c) |
| #define sub_overflow(a, b, c) __builtin_sub_overflow(a, b, c) |
| #define mul_overflow(a, b, c) __builtin_mul_overflow(a, b, c) |