| /* libc/sys/linux/sys/cdefs.h - Helper macros for K&R vs. ANSI C compat. */ |
| |
| /* Written 2000 by Werner Almesberger */ |
| |
| /*- |
| * SPDX-License-Identifier: BSD-3-Clause |
| * |
| * Copyright (c) 1991, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * This code is derived from software contributed to Berkeley by |
| * Berkeley Software Design, Inc. |
| * |
| * 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. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. |
| * |
| * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _SYS_CDEFS_H_ |
| #define _SYS_CDEFS_H_ |
| |
| #include <machine/_default_types.h> |
| #include <sys/features.h> |
| #include <stddef.h> |
| |
| #define __PMT(args) args |
| #define __DOTS , ... |
| #define __THROW |
| |
| #ifdef __GNUC__ |
| # define __ASMNAME(cname) __XSTRING (__USER_LABEL_PREFIX__) cname |
| #endif |
| |
| #define __ptr_t void * |
| #define __long_double_t long double |
| |
| #define __attribute_malloc__ |
| #define __attribute_pure__ |
| #define __attribute_format_strfmon__(a,b) |
| #define __flexarr [0] |
| |
| #ifndef __BOUNDED_POINTERS__ |
| # define __bounded /* nothing */ |
| # define __unbounded /* nothing */ |
| # define __ptrvalue /* nothing */ |
| #endif |
| |
| /* |
| * Testing against Clang-specific extensions. |
| */ |
| #ifndef __has_attribute |
| #define __has_attribute(x) 0 |
| #endif |
| #ifndef __has_extension |
| #define __has_extension __has_feature |
| #endif |
| #ifndef __has_feature |
| #define __has_feature(x) 0 |
| #endif |
| #ifndef __has_include |
| #define __has_include(x) 0 |
| #endif |
| #ifndef __has_builtin |
| #define __has_builtin(x) 0 |
| #endif |
| |
| #if defined(__cplusplus) |
| #define __BEGIN_DECLS extern "C" { |
| #define __END_DECLS } |
| #else |
| #define __BEGIN_DECLS |
| #define __END_DECLS |
| #endif |
| |
| /* |
| * This code has been put in place to help reduce the addition of |
| * compiler specific defines in FreeBSD code. It helps to aid in |
| * having a compiler-agnostic source tree. |
| */ |
| |
| #if defined(__GNUC__) || defined(__INTEL_COMPILER) |
| |
| #if __GNUC__ >= 3 || defined(__INTEL_COMPILER) |
| #define __GNUCLIKE_ASM 3 |
| #define __GNUCLIKE_MATH_BUILTIN_CONSTANTS |
| #else |
| #define __GNUCLIKE_ASM 2 |
| #endif |
| #define __GNUCLIKE___TYPEOF 1 |
| #define __GNUCLIKE___OFFSETOF 1 |
| #define __GNUCLIKE___SECTION 1 |
| |
| #ifndef __INTEL_COMPILER |
| #define __GNUCLIKE_CTOR_SECTION_HANDLING 1 |
| #endif |
| |
| #define __GNUCLIKE_BUILTIN_CONSTANT_P 1 |
| #if defined(__INTEL_COMPILER) && defined(__cplusplus) && \ |
| __INTEL_COMPILER < 800 |
| #undef __GNUCLIKE_BUILTIN_CONSTANT_P |
| #endif |
| |
| #if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3) |
| #define __GNUCLIKE_BUILTIN_VARARGS 1 |
| #define __GNUCLIKE_BUILTIN_STDARG 1 |
| #define __GNUCLIKE_BUILTIN_VAALIST 1 |
| #endif |
| |
| #if defined(__GNUC__) |
| #define __GNUC_VA_LIST_COMPATIBILITY 1 |
| #endif |
| |
| /* |
| * Compiler memory barriers, specific to gcc and clang. |
| */ |
| #if defined(__GNUC__) |
| #define __compiler_membar() __asm __volatile(" " : : : "memory") |
| #endif |
| |
| #ifndef __INTEL_COMPILER |
| #define __GNUCLIKE_BUILTIN_NEXT_ARG 1 |
| #define __GNUCLIKE_MATH_BUILTIN_RELOPS |
| #endif |
| |
| #define __GNUCLIKE_BUILTIN_MEMCPY 1 |
| |
| /* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */ |
| #define __CC_SUPPORTS_INLINE 1 |
| #define __CC_SUPPORTS___INLINE 1 |
| #define __CC_SUPPORTS___INLINE__ 1 |
| |
| #define __CC_SUPPORTS___FUNC__ 1 |
| #define __CC_SUPPORTS_WARNING 1 |
| |
| #define __CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */ |
| |
| #define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1 |
| |
| #endif /* __GNUC__ || __INTEL_COMPILER */ |
| |
| /* |
| * The __CONCAT macro is used to concatenate parts of symbol names, e.g. |
| * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. |
| * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI |
| * mode -- there must be no spaces between its arguments, and for nested |
| * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also |
| * concatenate double-quoted strings produced by the __STRING macro, but |
| * this only works with ANSI C. |
| * |
| * __XSTRING is like __STRING, but it expands any macros in its argument |
| * first. It is only available with ANSI C. |
| */ |
| #if defined(__STDC__) || defined(__cplusplus) |
| #define __P(protos) protos /* full-blown ANSI C */ |
| #define __CONCAT1(x,y) x ## y |
| #define __CONCAT(x,y) __CONCAT1(x,y) |
| #define __STRING(x) #x /* stringify without expanding x */ |
| #define __XSTRING(x) __STRING(x) /* expand x, then stringify */ |
| |
| #define __const const /* define reserved names to standard */ |
| #define __signed signed |
| #define __volatile volatile |
| #if defined(__cplusplus) |
| #define __inline inline /* convert to C++ keyword */ |
| #else |
| #if !(defined(__CC_SUPPORTS___INLINE)) |
| #define __inline /* delete GCC keyword */ |
| #endif /* ! __CC_SUPPORTS___INLINE */ |
| #endif /* !__cplusplus */ |
| |
| #else /* !(__STDC__ || __cplusplus) */ |
| #define __P(protos) () /* traditional C preprocessor */ |
| #define __CONCAT(x,y) x/**/y |
| #define __STRING(x) "x" |
| |
| #if !defined(__CC_SUPPORTS___INLINE) |
| #define __const /* delete pseudo-ANSI C keywords */ |
| #define __inline |
| #define __signed |
| #define __volatile |
| /* |
| * In non-ANSI C environments, new programs will want ANSI-only C keywords |
| * deleted from the program and old programs will want them left alone. |
| * When using a compiler other than gcc, programs using the ANSI C keywords |
| * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. |
| * When using "gcc -traditional", we assume that this is the intent; if |
| * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. |
| */ |
| #ifndef NO_ANSI_KEYWORDS |
| #define const /* delete ANSI C keywords */ |
| #define inline |
| #define signed |
| #define volatile |
| #endif /* !NO_ANSI_KEYWORDS */ |
| #endif /* !__CC_SUPPORTS___INLINE */ |
| #endif /* !(__STDC__ || __cplusplus) */ |
| |
| /* |
| * Compiler-dependent macros to help declare dead (non-returning) and |
| * pure (no side effects) functions, and unused variables. They are |
| * null except for versions of gcc that are known to support the features |
| * properly (old versions of gcc-2 supported the dead and pure features |
| * in a different (wrong) way). If we do not provide an implementation |
| * for a given compiler, let the compile fail if it is told to use |
| * a feature that we cannot live without. |
| */ |
| #define __weak_symbol __attribute__((__weak__)) |
| #if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER) |
| #define __dead2 |
| #define __pure2 |
| #define __unused |
| #endif |
| #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7 && !defined(__INTEL_COMPILER) |
| #define __dead2 __attribute__((__noreturn__)) |
| #define __pure2 __attribute__((__const__)) |
| #define __unused |
| /* XXX Find out what to do for __packed, __aligned and __section */ |
| #endif |
| #if __GNUC_PREREQ__(2, 7) || defined(__INTEL_COMPILER) |
| #define __dead2 __attribute__((__noreturn__)) |
| #define __pure2 __attribute__((__const__)) |
| #define __unused __attribute__((__unused__)) |
| #define __used __attribute__((__used__)) |
| #define __packed __attribute__((__packed__)) |
| #define __aligned(x) __attribute__((__aligned__(x))) |
| #define __section(x) __attribute__((__section__(x))) |
| #endif |
| #if __GNUC_PREREQ__(4, 3) || __has_attribute(__alloc_size__) |
| #define __alloc_size(x) __attribute__((__alloc_size__(x))) |
| #define __alloc_size2(n, x) __attribute__((__alloc_size__(n, x))) |
| #else |
| #define __alloc_size(x) |
| #define __alloc_size2(n, x) |
| #endif |
| #if __GNUC_PREREQ__(4, 9) || __has_attribute(__alloc_align__) |
| #define __alloc_align(x) __attribute__((__alloc_align__(x))) |
| #else |
| #define __alloc_align(x) |
| #endif |
| |
| #if !__GNUC_PREREQ__(2, 95) |
| #define __alignof(x) __offsetof(struct { char __a; x __b; }, __b) |
| #endif |
| |
| /* |
| * Keywords added in C11. |
| */ |
| |
| #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L |
| |
| #if !__has_extension(c_alignas) |
| #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ |
| __has_extension(cxx_alignas) |
| #define _Alignas(x) alignas(x) |
| #else |
| /* XXX: Only emulates _Alignas(constant-expression); not _Alignas(type-name). */ |
| #define _Alignas(x) __aligned(x) |
| #endif |
| #endif |
| |
| #if defined(__cplusplus) && __cplusplus >= 201103L |
| #define _Alignof(x) alignof(x) |
| #else |
| #define _Alignof(x) __alignof(x) |
| #endif |
| |
| #if !defined(__cplusplus) && !__has_extension(c_atomic) && \ |
| !__has_extension(cxx_atomic) && !__GNUC_PREREQ__(4, 7) |
| /* |
| * No native support for _Atomic(). Place object in structure to prevent |
| * most forms of direct non-atomic access. |
| */ |
| #define _Atomic(T) struct { T volatile __val; } |
| #endif |
| |
| #if defined(__cplusplus) && __cplusplus >= 201103L |
| #define _Noreturn [[noreturn]] |
| #else |
| #define _Noreturn __dead2 |
| #endif |
| |
| #if !__has_extension(c_static_assert) |
| #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ |
| __has_extension(cxx_static_assert) |
| #define _Static_assert(x, y) static_assert(x, y) |
| #elif __GNUC_PREREQ__(4,6) && !defined(__cplusplus) |
| /* Nothing, gcc 4.6 and higher has _Static_assert built-in */ |
| #elif defined(__COUNTER__) |
| #define _Static_assert(x, y) __Static_assert(x, __COUNTER__) |
| #define __Static_assert(x, y) ___Static_assert(x, y) |
| #define ___Static_assert(x, y) typedef char __assert_ ## y[(x) ? 1 : -1] \ |
| __unused |
| #else |
| #define _Static_assert(x, y) struct __hack |
| #endif |
| #endif |
| |
| #if !__has_extension(c_thread_local) |
| /* |
| * XXX: Some compilers (Clang 3.3, GCC 4.7) falsely announce C++11 mode |
| * without actually supporting the thread_local keyword. Don't check for |
| * the presence of C++11 when defining _Thread_local. |
| */ |
| #if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \ |
| __has_extension(cxx_thread_local) |
| #define _Thread_local thread_local |
| #else |
| #define _Thread_local __thread |
| #endif |
| #endif |
| |
| #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */ |
| |
| /* |
| * Emulation of C11 _Generic(). Unlike the previously defined C11 |
| * keywords, it is not possible to implement this using exactly the same |
| * syntax. Therefore implement something similar under the name |
| * __generic(). Unlike _Generic(), this macro can only distinguish |
| * between a single type, so it requires nested invocations to |
| * distinguish multiple cases. |
| */ |
| |
| #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \ |
| __has_extension(c_generic_selections) |
| #define __generic(expr, t, yes, no) \ |
| _Generic(expr, t: yes, default: no) |
| #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus) |
| #define __generic(expr, t, yes, no) \ |
| __builtin_choose_expr( \ |
| __builtin_types_compatible_p(__typeof(expr), t), yes, no) |
| #endif |
| |
| /* |
| * C99 Static array indices in function parameter declarations. Syntax such as: |
| * void bar(int myArray[static 10]); |
| * is allowed in C99 but not in C++. Define __min_size appropriately so |
| * headers using it can be compiled in either language. Use like this: |
| * void bar(int myArray[__min_size(10)]); |
| */ |
| #if !defined(__cplusplus) && \ |
| (defined(__clang__) || __GNUC_PREREQ__(4, 6)) && \ |
| (!defined(__STDC_VERSION__) || (__STDC_VERSION__ >= 199901)) |
| #define __min_size(x) static (x) |
| #else |
| #define __min_size(x) (x) |
| #endif |
| |
| #if __GNUC_PREREQ__(2, 96) |
| #define __malloc_like __attribute__((__malloc__)) |
| #define __pure __attribute__((__pure__)) |
| #else |
| #define __malloc_like |
| #define __pure |
| #endif |
| |
| #if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800) |
| #define __always_inline __inline__ __attribute__((__always_inline__)) |
| #else |
| #define __always_inline |
| #endif |
| |
| #if __GNUC_PREREQ__(3, 1) |
| #define __noinline __attribute__ ((__noinline__)) |
| #else |
| #define __noinline |
| #endif |
| |
| #if __GNUC_PREREQ__(3, 3) |
| #define __nonnull(x) __attribute__((__nonnull__ x)) |
| #define __nonnull_all __attribute__((__nonnull__)) |
| #else |
| #define __nonnull(x) |
| #define __nonnull_all |
| #endif |
| |
| #if __GNUC_PREREQ__(3, 4) |
| #define __fastcall __attribute__((__fastcall__)) |
| #define __result_use_check __attribute__((__warn_unused_result__)) |
| #else |
| #define __fastcall |
| #define __result_use_check |
| #endif |
| |
| #if __GNUC_PREREQ__(4, 1) |
| #define __returns_twice __attribute__((__returns_twice__)) |
| #else |
| #define __returns_twice |
| #endif |
| |
| #if __GNUC_PREREQ__(4, 6) || __has_builtin(__builtin_unreachable) |
| #define __unreachable() __builtin_unreachable() |
| #else |
| #define __unreachable() ((void)0) |
| #endif |
| |
| /* XXX: should use `#if __STDC_VERSION__ < 199901'. */ |
| #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) |
| #define __func__ NULL |
| #endif |
| |
| /* |
| * GCC 2.95 provides `__restrict' as an extension to C90 to support the |
| * C99-specific `restrict' type qualifier. We happen to use `__restrict' as |
| * a way to define the `restrict' type qualifier without disturbing older |
| * software that is unaware of C99 keywords. |
| */ |
| #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95) |
| #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 |
| #define __restrict |
| #else |
| #define __restrict restrict |
| #endif |
| #endif |
| |
| /* |
| * GNU C version 2.96 adds explicit branch prediction so that |
| * the CPU back-end can hint the processor and also so that |
| * code blocks can be reordered such that the predicted path |
| * sees a more linear flow, thus improving cache behavior, etc. |
| * |
| * The following two macros provide us with a way to utilize this |
| * compiler feature. Use __predict_true() if you expect the expression |
| * to evaluate to true, and __predict_false() if you expect the |
| * expression to evaluate to false. |
| * |
| * A few notes about usage: |
| * |
| * * Generally, __predict_false() error condition checks (unless |
| * you have some _strong_ reason to do otherwise, in which case |
| * document it), and/or __predict_true() `no-error' condition |
| * checks, assuming you want to optimize for the no-error case. |
| * |
| * * Other than that, if you don't know the likelihood of a test |
| * succeeding from empirical or other `hard' evidence, don't |
| * make predictions. |
| * |
| * * These are meant to be used in places that are run `a lot'. |
| * It is wasteful to make predictions in code that is run |
| * seldomly (e.g. at subsystem initialization time) as the |
| * basic block reordering that this affects can often generate |
| * larger code. |
| */ |
| #if __GNUC_PREREQ__(2, 96) |
| #define __predict_true(exp) __builtin_expect((exp), 1) |
| #define __predict_false(exp) __builtin_expect((exp), 0) |
| #else |
| #define __predict_true(exp) (exp) |
| #define __predict_false(exp) (exp) |
| #endif |
| |
| #if __GNUC_PREREQ__(4, 0) |
| #define __null_sentinel __attribute__((__sentinel__)) |
| #define __exported __attribute__((__visibility__("default"))) |
| /* Only default visibility is supported on PE/COFF targets. */ |
| #ifndef __CYGWIN__ |
| #define __hidden __attribute__((__visibility__("hidden"))) |
| #else |
| #define __hidden |
| #endif |
| #else |
| #define __null_sentinel |
| #define __exported |
| #define __hidden |
| #endif |
| |
| #define __offsetof(type, field) offsetof(type, field) |
| #define __rangeof(type, start, end) \ |
| (__offsetof(type, end) - __offsetof(type, start)) |
| |
| /* |
| * Given the pointer x to the member m of the struct s, return |
| * a pointer to the containing structure. When using GCC, we first |
| * assign pointer x to a local variable, to check that its type is |
| * compatible with member m. |
| */ |
| #if __GNUC_PREREQ__(3, 1) |
| #define __containerof(x, s, m) ({ \ |
| const volatile __typeof(((s *)0)->m) *__x = (x); \ |
| __DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m));\ |
| }) |
| #else |
| #define __containerof(x, s, m) \ |
| __DEQUALIFY(s *, (const volatile char *)(x) - __offsetof(s, m)) |
| #endif |
| |
| /* |
| * Compiler-dependent macros to declare that functions take printf-like |
| * or scanf-like arguments. They are null except for versions of gcc |
| * that are known to support the features properly (old versions of gcc-2 |
| * didn't permit keeping the keywords out of the application namespace). |
| */ |
| #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) |
| #define __printflike(fmtarg, firstvararg) |
| #define __scanflike(fmtarg, firstvararg) |
| #define __format_arg(fmtarg) |
| #define __strfmonlike(fmtarg, firstvararg) |
| #define __strftimelike(fmtarg, firstvararg) |
| #else |
| #define __printflike(fmtarg, firstvararg) \ |
| __attribute__((__format__ (__printf__, fmtarg, firstvararg))) |
| #define __scanflike(fmtarg, firstvararg) \ |
| __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) |
| #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) |
| #define __strfmonlike(fmtarg, firstvararg) \ |
| __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) |
| #define __strftimelike(fmtarg, firstvararg) \ |
| __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) |
| #endif |
| |
| /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */ |
| #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \ |
| defined(__GNUC__) && !defined(__INTEL_COMPILER) |
| #define __printf0like(fmtarg, firstvararg) \ |
| __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) |
| #else |
| #define __printf0like(fmtarg, firstvararg) |
| #endif |
| |
| #if defined(__GNUC__) || defined(__INTEL_COMPILER) |
| #ifndef __INTEL_COMPILER |
| #define __strong_reference(sym,aliassym) \ |
| extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))) |
| #endif |
| #ifdef __ELF__ |
| #ifdef __STDC__ |
| #define __weak_reference(sym,alias) \ |
| __asm__(".weak " #alias); \ |
| __asm__(".equ " #alias ", " #sym) |
| #define __warn_references(sym,msg) \ |
| __asm__(".section .gnu.warning." #sym); \ |
| __asm__(".asciz \"" msg "\""); \ |
| __asm__(".previous") |
| #define __sym_compat(sym,impl,verid) \ |
| __asm__(".symver " #impl ", " #sym "@" #verid) |
| #define __sym_default(sym,impl,verid) \ |
| __asm__(".symver " #impl ", " #sym "@@" #verid) |
| #else |
| #define __weak_reference(sym,alias) \ |
| __asm__(".weak alias"); \ |
| __asm__(".equ alias, sym") |
| #define __warn_references(sym,msg) \ |
| __asm__(".section .gnu.warning.sym"); \ |
| __asm__(".asciz \"msg\""); \ |
| __asm__(".previous") |
| #define __sym_compat(sym,impl,verid) \ |
| __asm__(".symver impl, sym@verid") |
| #define __sym_default(impl,sym,verid) \ |
| __asm__(".symver impl, sym@@verid") |
| #endif /* __STDC__ */ |
| #else /* !__ELF__ */ |
| #ifdef __STDC__ |
| #define __weak_reference(sym,alias) \ |
| __asm__(".stabs \"_" #alias "\",11,0,0,0"); \ |
| __asm__(".stabs \"_" #sym "\",1,0,0,0") |
| #define __warn_references(sym,msg) \ |
| __asm__(".stabs \"" msg "\",30,0,0,0"); \ |
| __asm__(".stabs \"_" #sym "\",1,0,0,0") |
| #else |
| #define __weak_reference(sym,alias) \ |
| __asm__(".stabs \"_/**/alias\",11,0,0,0"); \ |
| __asm__(".stabs \"_/**/sym\",1,0,0,0") |
| #define __warn_references(sym,msg) \ |
| __asm__(".stabs msg,30,0,0,0"); \ |
| __asm__(".stabs \"_/**/sym\",1,0,0,0") |
| #endif /* __STDC__ */ |
| #endif /* __ELF__ */ |
| #endif /* __GNUC__ || __INTEL_COMPILER */ |
| |
| #ifndef __FBSDID |
| #define __FBSDID(s) struct __hack |
| #endif |
| |
| #ifndef __RCSID |
| #define __RCSID(s) struct __hack |
| #endif |
| |
| #ifndef __RCSID_SOURCE |
| #define __RCSID_SOURCE(s) struct __hack |
| #endif |
| |
| #ifndef __SCCSID |
| #define __SCCSID(s) struct __hack |
| #endif |
| |
| #ifndef __COPYRIGHT |
| #define __COPYRIGHT(s) struct __hack |
| #endif |
| |
| #ifndef __DECONST |
| #define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var)) |
| #endif |
| |
| #ifndef __DEVOLATILE |
| #define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var)) |
| #endif |
| |
| #ifndef __DEQUALIFY |
| #define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var)) |
| #endif |
| |
| /* |
| * Nullability qualifiers: currently only supported by Clang. |
| */ |
| #if !(defined(__clang__) && __has_feature(nullability)) |
| #define _Nonnull |
| #define _Nullable |
| #define _Null_unspecified |
| #define __NULLABILITY_PRAGMA_PUSH |
| #define __NULLABILITY_PRAGMA_POP |
| #else |
| #define __NULLABILITY_PRAGMA_PUSH _Pragma("clang diagnostic push") \ |
| _Pragma("clang diagnostic ignored \"-Wnullability-completeness\"") |
| #define __NULLABILITY_PRAGMA_POP _Pragma("clang diagnostic pop") |
| #endif |
| |
| /* |
| * Type Safety Checking |
| * |
| * Clang provides additional attributes to enable checking type safety |
| * properties that cannot be enforced by the C type system. |
| */ |
| |
| #if __has_attribute(__argument_with_type_tag__) && \ |
| __has_attribute(__type_tag_for_datatype__) |
| #define __arg_type_tag(arg_kind, arg_idx, type_tag_idx) \ |
| __attribute__((__argument_with_type_tag__(arg_kind, arg_idx, type_tag_idx))) |
| #define __datatype_type_tag(kind, type) \ |
| __attribute__((__type_tag_for_datatype__(kind, type))) |
| #else |
| #define __arg_type_tag(arg_kind, arg_idx, type_tag_idx) |
| #define __datatype_type_tag(kind, type) |
| #endif |
| |
| /* |
| * Lock annotations. |
| * |
| * Clang provides support for doing basic thread-safety tests at |
| * compile-time, by marking which locks will/should be held when |
| * entering/leaving a functions. |
| * |
| * Furthermore, it is also possible to annotate variables and structure |
| * members to enforce that they are only accessed when certain locks are |
| * held. |
| */ |
| |
| #if __has_extension(c_thread_safety_attributes) |
| #define __lock_annotate(x) __attribute__((x)) |
| #else |
| #define __lock_annotate(x) |
| #endif |
| |
| /* Structure implements a lock. */ |
| /* FIXME: Use __lockable__, etc. to avoid colliding with user namespace macros, |
| * once clang is fixed: https://bugs.llvm.org/show_bug.cgi?id=34319 */ |
| #define __lockable __lock_annotate(lockable) |
| |
| /* Function acquires an exclusive or shared lock. */ |
| #define __locks_exclusive(...) \ |
| __lock_annotate(exclusive_lock_function(__VA_ARGS__)) |
| #define __locks_shared(...) \ |
| __lock_annotate(shared_lock_function(__VA_ARGS__)) |
| |
| /* Function attempts to acquire an exclusive or shared lock. */ |
| #define __trylocks_exclusive(...) \ |
| __lock_annotate(exclusive_trylock_function(__VA_ARGS__)) |
| #define __trylocks_shared(...) \ |
| __lock_annotate(shared_trylock_function(__VA_ARGS__)) |
| |
| /* Function releases a lock. */ |
| #define __unlocks(...) __lock_annotate(unlock_function(__VA_ARGS__)) |
| |
| /* Function asserts that an exclusive or shared lock is held. */ |
| #define __asserts_exclusive(...) \ |
| __lock_annotate(assert_exclusive_lock(__VA_ARGS__)) |
| #define __asserts_shared(...) \ |
| __lock_annotate(assert_shared_lock(__VA_ARGS__)) |
| |
| /* Function requires that an exclusive or shared lock is or is not held. */ |
| #define __requires_exclusive(...) \ |
| __lock_annotate(exclusive_locks_required(__VA_ARGS__)) |
| #define __requires_shared(...) \ |
| __lock_annotate(shared_locks_required(__VA_ARGS__)) |
| #define __requires_unlocked(...) \ |
| __lock_annotate(locks_excluded(__VA_ARGS__)) |
| |
| /* Function should not be analyzed. */ |
| #define __no_lock_analysis __lock_annotate(no_thread_safety_analysis) |
| |
| /* |
| * Function or variable should not be sanitized, i.e. by AddressSanitizer. |
| * GCC has the nosanitize attribute, but as a function attribute only, and |
| * warns on use as a variable attribute. |
| */ |
| #if __has_attribute(no_sanitize) && defined(__clang__) |
| #define __nosanitizeaddress __attribute__((no_sanitize("address"))) |
| #define __nosanitizethread __attribute__((no_sanitize("thread"))) |
| #else |
| #define __nosanitizeaddress |
| #define __nosanitizethread |
| #endif |
| |
| /* Guard variables and structure members by lock. */ |
| #define __guarded_by(x) __lock_annotate(guarded_by(x)) |
| #define __pt_guarded_by(x) __lock_annotate(pt_guarded_by(x)) |
| |
| #endif /* !_SYS_CDEFS_H_ */ |