1 /* 2 * Copyright (c) 2000-2018 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* Copyright 1995 NeXT Computer, Inc. All rights reserved. */ 29 /* 30 * Copyright (c) 1991, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * This code is derived from software contributed to Berkeley by 34 * Berkeley Software Design, Inc. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 65 */ 66 67 #ifndef _CDEFS_H_ 68 #define _CDEFS_H_ 69 70 #if defined(__cplusplus) 71 #define __BEGIN_DECLS extern "C" { 72 #define __END_DECLS } 73 #else 74 #define __BEGIN_DECLS 75 #define __END_DECLS 76 #endif 77 78 /* This SDK is designed to work with clang and specific versions of 79 * gcc >= 4.0 with Apple's patch sets */ 80 #if !defined(__GNUC__) || __GNUC__ < 4 81 #warning "Unsupported compiler detected" 82 #endif 83 84 /* 85 * Compatibility with compilers and environments that don't support compiler 86 * feature checking function-like macros. 87 */ 88 #ifndef __has_builtin 89 #define __has_builtin(x) 0 90 #endif 91 #ifndef __has_include 92 #define __has_include(x) 0 93 #endif 94 #ifndef __has_feature 95 #define __has_feature(x) 0 96 #endif 97 #ifndef __has_attribute 98 #define __has_attribute(x) 0 99 #endif 100 #ifndef __has_extension 101 #define __has_extension(x) 0 102 #endif 103 104 /* 105 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 106 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 107 * The __CONCAT macro is a bit tricky -- make sure you don't put spaces 108 * in between its arguments. __CONCAT can also concatenate double-quoted 109 * strings produced by the __STRING macro, but this only works with ANSI C. 110 */ 111 #if defined(__STDC__) || defined(__cplusplus) 112 #define __P(protos) protos /* full-blown ANSI C */ 113 #define __CONCAT(x, y) x ## y 114 #define __STRING(x) #x 115 116 #define __const const /* define reserved names to standard */ 117 #define __signed signed 118 #define __volatile volatile 119 #if defined(__cplusplus) 120 #define __inline inline /* convert to C++ keyword */ 121 #else 122 #ifndef __GNUC__ 123 #define __inline /* delete GCC keyword */ 124 #endif /* !__GNUC__ */ 125 #endif /* !__cplusplus */ 126 127 #else /* !(__STDC__ || __cplusplus) */ 128 #define __P(protos) () /* traditional C preprocessor */ 129 #define __CONCAT(x, y) x /**/ y 130 #define __STRING(x) "x" 131 132 #ifndef __GNUC__ 133 #define __const /* delete pseudo-ANSI C keywords */ 134 #define __inline 135 #define __signed 136 #define __volatile 137 #endif /* !__GNUC__ */ 138 139 /* 140 * In non-ANSI C environments, new programs will want ANSI-only C keywords 141 * deleted from the program and old programs will want them left alone. 142 * When using a compiler other than gcc, programs using the ANSI C keywords 143 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 144 * When using "gcc -traditional", we assume that this is the intent; if 145 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 146 */ 147 #ifndef NO_ANSI_KEYWORDS 148 #define const __const /* convert ANSI C keywords */ 149 #define inline __inline 150 #define signed __signed 151 #define volatile __volatile 152 #endif /* !NO_ANSI_KEYWORDS */ 153 #endif /* !(__STDC__ || __cplusplus) */ 154 155 /* 156 * __pure2 can be used for functions that are only a function of their scalar 157 * arguments (meaning they can't dereference pointers). 158 * 159 * __stateful_pure can be used for functions that have no side effects, 160 * but depend on the state of the memory. 161 */ 162 #define __dead2 __attribute__((__noreturn__)) 163 #define __pure2 __attribute__((__const__)) 164 #define __stateful_pure __attribute__((__pure__)) 165 166 /* __unused denotes variables and functions that may not be used, preventing 167 * the compiler from warning about it if not used. 168 */ 169 #define __unused __attribute__((__unused__)) 170 171 /* __used forces variables and functions to be included even if it appears 172 * to the compiler that they are not used (and would thust be discarded). 173 */ 174 #define __used __attribute__((__used__)) 175 176 /* __cold marks code used for debugging or that is rarely taken 177 * and tells the compiler to optimize for size and outline code. 178 */ 179 #if __has_attribute(cold) 180 #define __cold __attribute__((__cold__)) 181 #else 182 #define __cold 183 #endif 184 185 /* __exported denotes symbols that should be exported even when symbols 186 * are hidden by default. 187 * __exported_push/_exported_pop are pragmas used to delimit a range of 188 * symbols that should be exported even when symbols are hidden by default. 189 */ 190 #define __exported __attribute__((__visibility__("default"))) 191 #define __exported_push _Pragma("GCC visibility push(default)") 192 #define __exported_pop _Pragma("GCC visibility pop") 193 194 /* __deprecated causes the compiler to produce a warning when encountering 195 * code using the deprecated functionality. 196 * __deprecated_msg() does the same, and compilers that support it will print 197 * a message along with the deprecation warning. 198 * This may require turning on such warning with the -Wdeprecated flag. 199 * __deprecated_enum_msg() should be used on enums, and compilers that support 200 * it will print the deprecation warning. 201 * __kpi_deprecated() specifically indicates deprecation of kernel programming 202 * interfaces in Kernel.framework used by KEXTs. 203 */ 204 #define __deprecated __attribute__((__deprecated__)) 205 206 #if __has_extension(attribute_deprecated_with_message) || \ 207 (defined(__GNUC__) && ((__GNUC__ >= 5) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)))) 208 #define __deprecated_msg(_msg) __attribute__((__deprecated__(_msg))) 209 #else 210 #define __deprecated_msg(_msg) __attribute__((__deprecated__)) 211 #endif 212 213 #if __has_extension(enumerator_attributes) 214 #define __deprecated_enum_msg(_msg) __deprecated_msg(_msg) 215 #else 216 #define __deprecated_enum_msg(_msg) 217 #endif 218 219 #if defined(KERNEL) && !defined(KERNEL_PRIVATE) 220 #define __kpi_deprecated(_msg) __deprecated_msg(_msg) 221 #else /* !defined(KERNEL) || defined(KERNEL_PRIVATE) */ 222 #define __kpi_deprecated(_msg) 223 #endif /* !defined(KERNEL) || defined(KERNEL_PRIVATE) */ 224 225 /* __unavailable causes the compiler to error out when encountering 226 * code using the tagged function 227 */ 228 #if __has_attribute(unavailable) 229 #define __unavailable __attribute__((__unavailable__)) 230 #else 231 #define __unavailable 232 #endif 233 234 #if defined(KERNEL) && !defined(KERNEL_PRIVATE) 235 #define __kpi_unavailable __unavailable 236 #else /* !defined(KERNEL) || defined(KERNEL_PRIVATE) */ 237 #define __kpi_unavailable 238 #endif /* !defined(KERNEL) || defined(KERNEL_PRIVATE) */ 239 240 #if XNU_KERNEL_PRIVATE 241 /* This macro is meant to be used for kpi deprecated to x86 3rd parties 242 * but should be marked as unavailable for arm macOS devices. 243 * XNU: nothing (API is still available) 244 * 1st party kexts: __deprecated 245 * 3rd party kexts macOS x86: __deprecated 246 * 3rd party kexts macOS arm: __unavailable 247 */ 248 #define __kpi_deprecated_arm64_macos_unavailable 249 #elif !KERNEL || !PLATFORM_MacOSX 250 #define __kpi_deprecated_arm64_macos_unavailable 251 #elif KERNEL_PRIVATE 252 #define __kpi_deprecated_arm64_macos_unavailable __deprecated 253 #elif defined(__arm64__) 254 #define __kpi_deprecated_arm64_macos_unavailable __unavailable 255 #else 256 #define __kpi_deprecated_arm64_macos_unavailable __deprecated 257 #endif /* XNU_KERNEL_PRIVATE */ 258 259 /* Delete pseudo-keywords wherever they are not available or needed. */ 260 #ifndef __dead 261 #define __dead 262 #define __pure 263 #endif 264 265 /* 266 * We use `__restrict' as a way to define the `restrict' type qualifier 267 * without disturbing older software that is unaware of C99 keywords. 268 */ 269 #if __STDC_VERSION__ < 199901 270 #define __restrict 271 #else 272 #define __restrict restrict 273 #endif 274 275 /* Compatibility with compilers and environments that don't support the 276 * nullability feature. 277 */ 278 279 #if !__has_feature(nullability) 280 #ifndef __nullable 281 #define __nullable 282 #endif 283 #ifndef __nonnull 284 #define __nonnull 285 #endif 286 #ifndef __null_unspecified 287 #define __null_unspecified 288 #endif 289 #ifndef _Nullable 290 #define _Nullable 291 #endif 292 #ifndef _Nonnull 293 #define _Nonnull 294 #endif 295 #ifndef _Null_unspecified 296 #define _Null_unspecified 297 #endif 298 #endif 299 300 /* 301 * __disable_tail_calls causes the compiler to not perform tail call 302 * optimization inside the marked function. 303 */ 304 #if __has_attribute(disable_tail_calls) 305 #define __disable_tail_calls __attribute__((__disable_tail_calls__)) 306 #else 307 #define __disable_tail_calls 308 #endif 309 310 /* 311 * __not_tail_called causes the compiler to prevent tail call optimization 312 * on statically bound calls to the function. It has no effect on indirect 313 * calls. Virtual functions, objective-c methods, and functions marked as 314 * "always_inline" cannot be marked as __not_tail_called. 315 */ 316 #if __has_attribute(not_tail_called) 317 #define __not_tail_called __attribute__((__not_tail_called__)) 318 #else 319 #define __not_tail_called 320 #endif 321 322 /* 323 * __result_use_check warns callers of a function that not using the function 324 * return value is a bug, i.e. dismissing malloc() return value results in a 325 * memory leak. 326 */ 327 #if __has_attribute(warn_unused_result) 328 #define __result_use_check __attribute__((__warn_unused_result__)) 329 #else 330 #define __result_use_check 331 #endif 332 333 /* 334 * __swift_unavailable causes the compiler to mark a symbol as specifically 335 * unavailable in Swift, regardless of any other availability in C. 336 */ 337 #if __has_feature(attribute_availability_swift) 338 #define __swift_unavailable(_msg) __attribute__((__availability__(swift, unavailable, message=_msg))) 339 #else 340 #define __swift_unavailable(_msg) 341 #endif 342 343 /* 344 * __abortlike is the attribute to put on functions like abort() that are 345 * typically used to mark assertions. These optimize the codegen 346 * for outlining while still maintaining debugability. 347 */ 348 #ifndef __abortlike 349 #define __abortlike __dead2 __cold __not_tail_called 350 #endif 351 352 /* Declaring inline functions within headers is error-prone due to differences 353 * across various versions of the C language and extensions. __header_inline 354 * can be used to declare inline functions within system headers. In cases 355 * where you want to force inlining instead of letting the compiler make 356 * the decision, you can use __header_always_inline. 357 * 358 * Be aware that using inline for functions which compilers may also provide 359 * builtins can behave differently under various compilers. If you intend to 360 * provide an inline version of such a function, you may want to use a macro 361 * instead. 362 * 363 * The check for !__GNUC__ || __clang__ is because gcc doesn't correctly 364 * support c99 inline in some cases: 365 * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55965 366 */ 367 368 #if defined(__cplusplus) || \ 369 (__STDC_VERSION__ >= 199901L && \ 370 !defined(__GNUC_GNU_INLINE__) && \ 371 (!defined(__GNUC__) || defined(__clang__))) 372 # define __header_inline inline 373 #elif defined(__GNUC__) && defined(__GNUC_STDC_INLINE__) 374 # define __header_inline extern __inline __attribute__((__gnu_inline__)) 375 #elif defined(__GNUC__) 376 # define __header_inline extern __inline 377 #else 378 /* If we land here, we've encountered an unsupported compiler, 379 * so hopefully it understands static __inline as a fallback. 380 */ 381 # define __header_inline static __inline 382 #endif 383 384 #ifdef __GNUC__ 385 # define __header_always_inline __header_inline __attribute__ ((__always_inline__)) 386 #else 387 /* Unfortunately, we're using a compiler that we don't know how to force to 388 * inline. Oh well. 389 */ 390 # define __header_always_inline __header_inline 391 #endif 392 393 /* 394 * Compiler-dependent macros that bracket portions of code where the 395 * "-Wunreachable-code" warning should be ignored. Please use sparingly. 396 */ 397 #if defined(__clang__) 398 # define __unreachable_ok_push \ 399 _Pragma("clang diagnostic push") \ 400 _Pragma("clang diagnostic ignored \"-Wunreachable-code\"") 401 # define __unreachable_ok_pop \ 402 _Pragma("clang diagnostic pop") 403 #elif defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) 404 # define __unreachable_ok_push \ 405 _Pragma("GCC diagnostic push") \ 406 _Pragma("GCC diagnostic ignored \"-Wunreachable-code\"") 407 # define __unreachable_ok_pop \ 408 _Pragma("GCC diagnostic pop") 409 #else 410 # define __unreachable_ok_push 411 # define __unreachable_ok_pop 412 #endif 413 414 /* 415 * Compiler-dependent macros to declare that functions take printf-like 416 * or scanf-like arguments. They are null except for versions of gcc 417 * that are known to support the features properly. Functions declared 418 * with these attributes will cause compilation warnings if there is a 419 * mismatch between the format string and subsequent function parameter 420 * types. 421 */ 422 #define __printflike(fmtarg, firstvararg) \ 423 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 424 #define __printf0like(fmtarg, firstvararg) \ 425 __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 426 #define __scanflike(fmtarg, firstvararg) \ 427 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 428 #define __osloglike(fmtarg, firstvararg) \ 429 __attribute__((__format__ (__os_log__, fmtarg, firstvararg))) 430 431 #define __IDSTRING(name, string) static const char name[] __used = string 432 433 #ifndef __COPYRIGHT 434 #define __COPYRIGHT(s) __IDSTRING(copyright,s) 435 #endif 436 437 #ifndef __RCSID 438 #define __RCSID(s) __IDSTRING(rcsid,s) 439 #endif 440 441 #ifndef __SCCSID 442 #define __SCCSID(s) __IDSTRING(sccsid,s) 443 #endif 444 445 #ifndef __PROJECT_VERSION 446 #define __PROJECT_VERSION(s) __IDSTRING(project_version,s) 447 #endif 448 449 /* Source compatibility only, ID string not emitted in object file */ 450 #ifndef __FBSDID 451 #define __FBSDID(s) 452 #endif 453 454 #ifndef __DECONST 455 #define __DECONST(type, var) __CAST_AWAY_QUALIFIER(var, const, type) 456 #endif 457 458 #ifndef __DEVOLATILE 459 #define __DEVOLATILE(type, var) __CAST_AWAY_QUALIFIER(var, volatile, type) 460 #endif 461 462 #ifndef __DEQUALIFY 463 #define __DEQUALIFY(type, var) __CAST_AWAY_QUALIFIER(var, const volatile, type) 464 #endif 465 466 /* 467 * __alloc_size can be used to label function arguments that represent the 468 * size of memory that the function allocates and returns. The one-argument 469 * form labels a single argument that gives the allocation size (where the 470 * arguments are numbered from 1): 471 * 472 * void *malloc(size_t __size) __alloc_size(1); 473 * 474 * The two-argument form handles the case where the size is calculated as the 475 * product of two arguments: 476 * 477 * void *calloc(size_t __count, size_t __size) __alloc_size(1,2); 478 */ 479 #ifndef __alloc_size 480 #if __has_attribute(alloc_size) 481 #define __alloc_size(...) __attribute__((alloc_size(__VA_ARGS__))) 482 #else 483 #define __alloc_size(...) 484 #endif 485 #endif // __alloc_size 486 487 /* 488 * COMPILATION ENVIRONMENTS -- see compat(5) for additional detail 489 * 490 * DEFAULT By default newly complied code will get POSIX APIs plus 491 * Apple API extensions in scope. 492 * 493 * Most users will use this compilation environment to avoid 494 * behavioral differences between 32 and 64 bit code. 495 * 496 * LEGACY Defining _NONSTD_SOURCE will get pre-POSIX APIs plus Apple 497 * API extensions in scope. 498 * 499 * This is generally equivalent to the Tiger release compilation 500 * environment, except that it cannot be applied to 64 bit code; 501 * its use is discouraged. 502 * 503 * We expect this environment to be deprecated in the future. 504 * 505 * STRICT Defining _POSIX_C_SOURCE or _XOPEN_SOURCE restricts the 506 * available APIs to exactly the set of APIs defined by the 507 * corresponding standard, based on the value defined. 508 * 509 * A correct, portable definition for _POSIX_C_SOURCE is 200112L. 510 * A correct, portable definition for _XOPEN_SOURCE is 600L. 511 * 512 * Apple API extensions are not visible in this environment, 513 * which can cause Apple specific code to fail to compile, 514 * or behave incorrectly if prototypes are not in scope or 515 * warnings about missing prototypes are not enabled or ignored. 516 * 517 * In any compilation environment, for correct symbol resolution to occur, 518 * function prototypes must be in scope. It is recommended that all Apple 519 * tools users add either the "-Wall" or "-Wimplicit-function-declaration" 520 * compiler flags to their projects to be warned when a function is being 521 * used without a prototype in scope. 522 */ 523 524 /* These settings are particular to each product. */ 525 #ifdef KERNEL 526 #define __DARWIN_ONLY_64_BIT_INO_T 0 527 #define __DARWIN_ONLY_UNIX_CONFORMANCE 0 528 #define __DARWIN_ONLY_VERS_1050 0 529 #if defined(__x86_64__) 530 #define __DARWIN_SUF_DARWIN14 "_darwin14" 531 #define __DARWIN14_ALIAS(sym) __asm("_" __STRING(sym) __DARWIN_SUF_DARWIN14) 532 #else 533 #define __DARWIN14_ALIAS(sym) 534 #endif 535 #else /* !KERNEL */ 536 #ifdef PLATFORM_iPhoneOS 537 /* Platform: iPhoneOS */ 538 #define __DARWIN_ONLY_64_BIT_INO_T 1 539 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 540 #define __DARWIN_ONLY_VERS_1050 1 541 #endif /* PLATFORM_iPhoneOS */ 542 #ifdef PLATFORM_iPhoneSimulator 543 /* Platform: iPhoneSimulator */ 544 #define __DARWIN_ONLY_64_BIT_INO_T 1 545 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 546 #define __DARWIN_ONLY_VERS_1050 1 547 #endif /* PLATFORM_iPhoneSimulator */ 548 #ifdef PLATFORM_tvOS 549 /* Platform: tvOS */ 550 #define __DARWIN_ONLY_64_BIT_INO_T 1 551 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 552 #define __DARWIN_ONLY_VERS_1050 1 553 #endif /* PLATFORM_tvOS */ 554 #ifdef PLATFORM_AppleTVOS 555 /* Platform: AppleTVOS */ 556 #define __DARWIN_ONLY_64_BIT_INO_T 1 557 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 558 #define __DARWIN_ONLY_VERS_1050 1 559 #endif /* PLATFORM_AppleTVOS */ 560 #ifdef PLATFORM_tvSimulator 561 /* Platform: tvSimulator */ 562 #define __DARWIN_ONLY_64_BIT_INO_T 1 563 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 564 #define __DARWIN_ONLY_VERS_1050 1 565 #endif /* PLATFORM_tvSimulator */ 566 #ifdef PLATFORM_AppleTVSimulator 567 /* Platform: AppleTVSimulator */ 568 #define __DARWIN_ONLY_64_BIT_INO_T 1 569 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 570 #define __DARWIN_ONLY_VERS_1050 1 571 #endif /* PLATFORM_AppleTVSimulator */ 572 #ifdef PLATFORM_iPhoneOSNano 573 /* Platform: iPhoneOSNano */ 574 #define __DARWIN_ONLY_64_BIT_INO_T 1 575 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 576 #define __DARWIN_ONLY_VERS_1050 1 577 #endif /* PLATFORM_iPhoneOSNano */ 578 #ifdef PLATFORM_iPhoneNanoSimulator 579 /* Platform: iPhoneNanoSimulator */ 580 #define __DARWIN_ONLY_64_BIT_INO_T 1 581 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 582 #define __DARWIN_ONLY_VERS_1050 1 583 #endif /* PLATFORM_iPhoneNanoSimulator */ 584 #ifdef PLATFORM_WatchOS 585 /* Platform: WatchOS */ 586 #define __DARWIN_ONLY_64_BIT_INO_T 1 587 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 588 #define __DARWIN_ONLY_VERS_1050 1 589 #endif /* PLATFORM_WatchOS */ 590 #ifdef PLATFORM_WatchSimulator 591 /* Platform: WatchSimulator */ 592 #define __DARWIN_ONLY_64_BIT_INO_T 1 593 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 594 #define __DARWIN_ONLY_VERS_1050 1 595 #endif /* PLATFORM_WatchSimulator */ 596 #ifdef PLATFORM_BridgeOS 597 /* Platform: BridgeOS */ 598 #define __DARWIN_ONLY_64_BIT_INO_T 1 599 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 600 #define __DARWIN_ONLY_VERS_1050 1 601 #endif /* PLATFORM_BridgeOS */ 602 #ifdef PLATFORM_DriverKit 603 /* Platform: DriverKit */ 604 #define __DARWIN_ONLY_64_BIT_INO_T 1 605 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 606 #define __DARWIN_ONLY_VERS_1050 1 607 #endif /* PLATFORM_DriverKit */ 608 #ifdef PLATFORM_MacOSX 609 /* Platform: MacOSX */ 610 #if defined(__i386__) 611 #define __DARWIN_ONLY_64_BIT_INO_T 0 612 #define __DARWIN_ONLY_UNIX_CONFORMANCE 0 613 #define __DARWIN_ONLY_VERS_1050 0 614 #elif defined(__x86_64__) 615 #define __DARWIN_ONLY_64_BIT_INO_T 0 616 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 617 #define __DARWIN_ONLY_VERS_1050 0 618 #else 619 #define __DARWIN_ONLY_64_BIT_INO_T 1 620 #define __DARWIN_ONLY_UNIX_CONFORMANCE 1 621 #define __DARWIN_ONLY_VERS_1050 1 622 #endif 623 #endif /* PLATFORM_MacOSX */ 624 #endif /* KERNEL */ 625 626 /* 627 * The __DARWIN_ALIAS macros are used to do symbol renaming; they allow 628 * legacy code to use the old symbol, thus maintaining binary compatibility 629 * while new code can use a standards compliant version of the same function. 630 * 631 * __DARWIN_ALIAS is used by itself if the function signature has not 632 * changed, it is used along with a #ifdef check for __DARWIN_UNIX03 633 * if the signature has changed. Because the __LP64__ environment 634 * only supports UNIX03 semantics it causes __DARWIN_UNIX03 to be 635 * defined, but causes __DARWIN_ALIAS to do no symbol mangling. 636 * 637 * As a special case, when XCode is used to target a specific version of the 638 * OS, the manifest constant __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 639 * will be defined by the compiler, with the digits representing major version 640 * time 100 + minor version times 10 (e.g. 10.5 := 1050). If we are targeting 641 * pre-10.5, and it is the default compilation environment, revert the 642 * compilation environment to pre-__DARWIN_UNIX03. 643 */ 644 #if !defined(__DARWIN_UNIX03) 645 # if defined(KERNEL) 646 # define __DARWIN_UNIX03 0 647 # elif __DARWIN_ONLY_UNIX_CONFORMANCE 648 # if defined(_NONSTD_SOURCE) 649 # error "Can't define _NONSTD_SOURCE when only UNIX conformance is available." 650 # endif /* _NONSTD_SOURCE */ 651 # define __DARWIN_UNIX03 1 652 # elif defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && ((__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ - 0) < 1040) 653 # define __DARWIN_UNIX03 0 654 # elif defined(_DARWIN_C_SOURCE) || defined(_XOPEN_SOURCE) || defined(_POSIX_C_SOURCE) 655 # if defined(_NONSTD_SOURCE) 656 # error "Can't define both _NONSTD_SOURCE and any of _DARWIN_C_SOURCE, _XOPEN_SOURCE or _POSIX_C_SOURCE." 657 # endif /* _NONSTD_SOURCE */ 658 # define __DARWIN_UNIX03 1 659 # elif defined(_NONSTD_SOURCE) 660 # define __DARWIN_UNIX03 0 661 # else /* default */ 662 # if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && ((__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ - 0) < 1050) 663 # define __DARWIN_UNIX03 0 664 # else /* __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050 */ 665 # define __DARWIN_UNIX03 1 666 # endif /* __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050 */ 667 # endif /* _DARWIN_C_SOURCE || _XOPEN_SOURCE || _POSIX_C_SOURCE || __LP64__ */ 668 #endif /* !__DARWIN_UNIX03 */ 669 670 #if !defined(__DARWIN_64_BIT_INO_T) 671 # if defined(KERNEL) 672 # define __DARWIN_64_BIT_INO_T 0 673 # elif defined(_DARWIN_USE_64_BIT_INODE) 674 # if defined(_DARWIN_NO_64_BIT_INODE) 675 # error "Can't define both _DARWIN_USE_64_BIT_INODE and _DARWIN_NO_64_BIT_INODE." 676 # endif /* _DARWIN_NO_64_BIT_INODE */ 677 # define __DARWIN_64_BIT_INO_T 1 678 # elif defined(_DARWIN_NO_64_BIT_INODE) 679 # if __DARWIN_ONLY_64_BIT_INO_T 680 # error "Can't define _DARWIN_NO_64_BIT_INODE when only 64-bit inodes are available." 681 # endif /* __DARWIN_ONLY_64_BIT_INO_T */ 682 # define __DARWIN_64_BIT_INO_T 0 683 # else /* default */ 684 # if __DARWIN_ONLY_64_BIT_INO_T 685 # define __DARWIN_64_BIT_INO_T 1 686 # elif defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && ((__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ - 0) < 1060) || __DARWIN_UNIX03 == 0 687 # define __DARWIN_64_BIT_INO_T 0 688 # else /* default */ 689 # define __DARWIN_64_BIT_INO_T 1 690 # endif /* __DARWIN_ONLY_64_BIT_INO_T */ 691 # endif 692 #endif /* !__DARWIN_64_BIT_INO_T */ 693 694 #if !defined(__DARWIN_VERS_1050) 695 # if defined(KERNEL) 696 # define __DARWIN_VERS_1050 0 697 # elif __DARWIN_ONLY_VERS_1050 698 # define __DARWIN_VERS_1050 1 699 # elif defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && ((__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ - 0) < 1050) || __DARWIN_UNIX03 == 0 700 # define __DARWIN_VERS_1050 0 701 # else /* default */ 702 # define __DARWIN_VERS_1050 1 703 # endif 704 #endif /* !__DARWIN_VERS_1050 */ 705 706 #if !defined(__DARWIN_NON_CANCELABLE) 707 # if defined(KERNEL) 708 # define __DARWIN_NON_CANCELABLE 0 709 # else /* default */ 710 # define __DARWIN_NON_CANCELABLE 0 711 # endif 712 #endif /* !__DARWIN_NON_CANCELABLE */ 713 714 /* 715 * symbol suffixes used for symbol versioning 716 */ 717 #if __DARWIN_UNIX03 718 # if __DARWIN_ONLY_UNIX_CONFORMANCE 719 # define __DARWIN_SUF_UNIX03 /* nothing */ 720 # else /* !__DARWIN_ONLY_UNIX_CONFORMANCE */ 721 # define __DARWIN_SUF_UNIX03 "$UNIX2003" 722 # endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */ 723 724 # if __DARWIN_64_BIT_INO_T 725 # if __DARWIN_ONLY_64_BIT_INO_T 726 # define __DARWIN_SUF_64_BIT_INO_T /* nothing */ 727 # else /* !__DARWIN_ONLY_64_BIT_INO_T */ 728 # define __DARWIN_SUF_64_BIT_INO_T "$INODE64" 729 # endif /* __DARWIN_ONLY_64_BIT_INO_T */ 730 # else /* !__DARWIN_64_BIT_INO_T */ 731 # define __DARWIN_SUF_64_BIT_INO_T /* nothing */ 732 # endif /* __DARWIN_64_BIT_INO_T */ 733 734 # if __DARWIN_VERS_1050 735 # if __DARWIN_ONLY_VERS_1050 736 # define __DARWIN_SUF_1050 /* nothing */ 737 # else /* !__DARWIN_ONLY_VERS_1050 */ 738 # define __DARWIN_SUF_1050 "$1050" 739 # endif /* __DARWIN_ONLY_VERS_1050 */ 740 # else /* !__DARWIN_VERS_1050 */ 741 # define __DARWIN_SUF_1050 /* nothing */ 742 # endif /* __DARWIN_VERS_1050 */ 743 744 # if __DARWIN_NON_CANCELABLE 745 # define __DARWIN_SUF_NON_CANCELABLE "$NOCANCEL" 746 # else /* !__DARWIN_NON_CANCELABLE */ 747 # define __DARWIN_SUF_NON_CANCELABLE /* nothing */ 748 # endif /* __DARWIN_NON_CANCELABLE */ 749 750 #else /* !__DARWIN_UNIX03 */ 751 # define __DARWIN_SUF_UNIX03 /* nothing */ 752 # define __DARWIN_SUF_64_BIT_INO_T /* nothing */ 753 # define __DARWIN_SUF_NON_CANCELABLE /* nothing */ 754 # define __DARWIN_SUF_1050 /* nothing */ 755 #endif /* __DARWIN_UNIX03 */ 756 757 #define __DARWIN_SUF_EXTSN "$DARWIN_EXTSN" 758 759 /* 760 * symbol versioning macros 761 */ 762 #define __DARWIN_ALIAS(sym) __asm("_" __STRING(sym) __DARWIN_SUF_UNIX03) 763 #define __DARWIN_ALIAS_C(sym) __asm("_" __STRING(sym) __DARWIN_SUF_NON_CANCELABLE __DARWIN_SUF_UNIX03) 764 #define __DARWIN_ALIAS_I(sym) __asm("_" __STRING(sym) __DARWIN_SUF_64_BIT_INO_T __DARWIN_SUF_UNIX03) 765 #define __DARWIN_NOCANCEL(sym) __asm("_" __STRING(sym) __DARWIN_SUF_NON_CANCELABLE) 766 #define __DARWIN_INODE64(sym) __asm("_" __STRING(sym) __DARWIN_SUF_64_BIT_INO_T) 767 768 #define __DARWIN_1050(sym) __asm("_" __STRING(sym) __DARWIN_SUF_1050) 769 #define __DARWIN_1050ALIAS(sym) __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_UNIX03) 770 #define __DARWIN_1050ALIAS_C(sym) __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_NON_CANCELABLE __DARWIN_SUF_UNIX03) 771 #define __DARWIN_1050ALIAS_I(sym) __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_64_BIT_INO_T __DARWIN_SUF_UNIX03) 772 #define __DARWIN_1050INODE64(sym) __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_64_BIT_INO_T) 773 774 #define __DARWIN_EXTSN(sym) __asm("_" __STRING(sym) __DARWIN_SUF_EXTSN) 775 #define __DARWIN_EXTSN_C(sym) __asm("_" __STRING(sym) __DARWIN_SUF_EXTSN __DARWIN_SUF_NON_CANCELABLE) 776 #if XNU_KERNEL_PRIVATE 777 #define __XNU_INTERNAL(sym) __asm("_" __STRING(sym) "$XNU_INTERNAL") __attribute__((used)) 778 #endif 779 780 /* 781 * symbol release macros 782 */ 783 #ifdef KERNEL 784 #define __DARWIN_ALIAS_STARTING(_mac, _iphone, x) 785 #else 786 #include <sys/_symbol_aliasing.h> 787 788 #if defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) 789 #define __DARWIN_ALIAS_STARTING(_mac, _iphone, x) __DARWIN_ALIAS_STARTING_IPHONE_##_iphone(x) 790 #elif defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) 791 #define __DARWIN_ALIAS_STARTING(_mac, _iphone, x) __DARWIN_ALIAS_STARTING_MAC_##_mac(x) 792 #else 793 #define __DARWIN_ALIAS_STARTING(_mac, _iphone, x) x 794 #endif 795 #endif /* KERNEL */ 796 797 798 /* 799 * POSIX.1 requires that the macros we test be defined before any standard 800 * header file is included. This permits us to convert values for feature 801 * testing, as necessary, using only _POSIX_C_SOURCE. 802 * 803 * Here's a quick run-down of the versions: 804 * defined(_POSIX_SOURCE) 1003.1-1988 805 * _POSIX_C_SOURCE == 1L 1003.1-1990 806 * _POSIX_C_SOURCE == 2L 1003.2-1992 C Language Binding Option 807 * _POSIX_C_SOURCE == 199309L 1003.1b-1993 808 * _POSIX_C_SOURCE == 199506L 1003.1c-1995, 1003.1i-1995, 809 * and the omnibus ISO/IEC 9945-1: 1996 810 * _POSIX_C_SOURCE == 200112L 1003.1-2001 811 * _POSIX_C_SOURCE == 200809L 1003.1-2008 812 * 813 * In addition, the X/Open Portability Guide, which is now the Single UNIX 814 * Specification, defines a feature-test macro which indicates the version of 815 * that specification, and which subsumes _POSIX_C_SOURCE. 816 */ 817 818 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1L. */ 819 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1L 820 #undef _POSIX_C_SOURCE 821 #define _POSIX_C_SOURCE 199009L 822 #endif 823 824 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2L. */ 825 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2L 826 #undef _POSIX_C_SOURCE 827 #define _POSIX_C_SOURCE 199209L 828 #endif 829 830 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 831 #ifdef _XOPEN_SOURCE 832 #if _XOPEN_SOURCE - 0L >= 700L && (!defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE - 0L < 200809L) 833 #undef _POSIX_C_SOURCE 834 #define _POSIX_C_SOURCE 200809L 835 #elif _XOPEN_SOURCE - 0L >= 600L && (!defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE - 0L < 200112L) 836 #undef _POSIX_C_SOURCE 837 #define _POSIX_C_SOURCE 200112L 838 #elif _XOPEN_SOURCE - 0L >= 500L && (!defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE - 0L < 199506L) 839 #undef _POSIX_C_SOURCE 840 #define _POSIX_C_SOURCE 199506L 841 #endif 842 #endif 843 844 /* 845 * Deal with all versions of POSIX. The ordering relative to the tests above is 846 * important. 847 */ 848 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 849 #define _POSIX_C_SOURCE 198808L 850 #endif 851 852 /* POSIX C deprecation macros */ 853 #ifdef KERNEL 854 #define __POSIX_C_DEPRECATED(ver) 855 #else 856 #include <sys/_posix_availability.h> 857 858 #define __POSIX_C_DEPRECATED(ver) ___POSIX_C_DEPRECATED_STARTING_##ver 859 #endif 860 861 /* 862 * Set a single macro which will always be defined and can be used to determine 863 * the appropriate namespace. For POSIX, these values will correspond to 864 * _POSIX_C_SOURCE value. Currently there are two additional levels corresponding 865 * to ANSI (_ANSI_SOURCE) and Darwin extensions (_DARWIN_C_SOURCE) 866 */ 867 #define __DARWIN_C_ANSI 010000L 868 #define __DARWIN_C_FULL 900000L 869 870 #if defined(_ANSI_SOURCE) 871 #define __DARWIN_C_LEVEL __DARWIN_C_ANSI 872 #elif defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE) && !defined(_NONSTD_SOURCE) 873 #define __DARWIN_C_LEVEL _POSIX_C_SOURCE 874 #else 875 #define __DARWIN_C_LEVEL __DARWIN_C_FULL 876 #endif 877 878 /* If the developer has neither requested a strict language mode nor a version 879 * of POSIX, turn on functionality provided by __STDC_WANT_LIB_EXT1__ as part 880 * of __DARWIN_C_FULL. 881 */ 882 #if !defined(__STDC_WANT_LIB_EXT1__) && !defined(__STRICT_ANSI__) && __DARWIN_C_LEVEL >= __DARWIN_C_FULL 883 #define __STDC_WANT_LIB_EXT1__ 1 884 #endif 885 886 /* 887 * long long is not supported in c89 (__STRICT_ANSI__), but g++ -ansi and 888 * c99 still want long longs. While not perfect, we allow long longs for 889 * g++. 890 */ 891 #if (defined(__STRICT_ANSI__) && (__STDC_VERSION__ - 0 < 199901L) && !defined(__GNUG__)) 892 #define __DARWIN_NO_LONG_LONG 1 893 #else 894 #define __DARWIN_NO_LONG_LONG 0 895 #endif 896 897 /***************************************** 898 * Public darwin-specific feature macros 899 *****************************************/ 900 901 /* 902 * _DARWIN_FEATURE_64_BIT_INODE indicates that the ino_t type is 64-bit, and 903 * structures modified for 64-bit inodes (like struct stat) will be used. 904 */ 905 #if __DARWIN_64_BIT_INO_T 906 #define _DARWIN_FEATURE_64_BIT_INODE 1 907 #endif 908 909 /* 910 * _DARWIN_FEATURE_64_ONLY_BIT_INODE indicates that the ino_t type may only 911 * be 64-bit; there is no support for 32-bit ino_t when this macro is defined 912 * (and non-zero). There is no struct stat64 either, as the regular 913 * struct stat will already be the 64-bit version. 914 */ 915 #if __DARWIN_ONLY_64_BIT_INO_T 916 #define _DARWIN_FEATURE_ONLY_64_BIT_INODE 1 917 #endif 918 919 /* 920 * _DARWIN_FEATURE_ONLY_VERS_1050 indicates that only those APIs updated 921 * in 10.5 exists; no pre-10.5 variants are available. 922 */ 923 #if __DARWIN_ONLY_VERS_1050 924 #define _DARWIN_FEATURE_ONLY_VERS_1050 1 925 #endif 926 927 /* 928 * _DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE indicates only UNIX conforming API 929 * are available (the legacy BSD APIs are not available) 930 */ 931 #if __DARWIN_ONLY_UNIX_CONFORMANCE 932 #define _DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE 1 933 #endif 934 935 /* 936 * _DARWIN_FEATURE_UNIX_CONFORMANCE indicates whether UNIX conformance is on, 937 * and specifies the conformance level (3 is SUSv3) 938 */ 939 #if __DARWIN_UNIX03 940 #define _DARWIN_FEATURE_UNIX_CONFORMANCE 3 941 #endif 942 943 #if defined(DRIVERKIT) && !defined(KERNEL) 944 /* 945 * __DRIVERKIT_LIBC__ indicates to the C++ standard library headers and 946 * similar components that only the restricted set of standard C library 947 * functionality and headers for the DriverKit userspace driver environment 948 * are available. 949 */ 950 #define __DRIVERKIT_LIBC__ 1 951 #endif /* defined(DRIVERKIT) && !defined(KERNEL) */ 952 953 /* 954 * This macro casts away the qualifier from the variable 955 * 956 * Note: use at your own risk, removing qualifiers can result in 957 * catastrophic run-time failures. 958 */ 959 #ifndef __CAST_AWAY_QUALIFIER 960 #define __CAST_AWAY_QUALIFIER(variable, qualifier, type) (type) (long)(variable) 961 #endif 962 963 /* 964 * __XNU_PRIVATE_EXTERN is a linkage decoration indicating that a symbol can be 965 * used from other compilation units, but not other libraries or executables. 966 */ 967 #ifndef __XNU_PRIVATE_EXTERN 968 #define __XNU_PRIVATE_EXTERN __attribute__((visibility("hidden"))) 969 #endif 970 971 #if __has_include(<ptrcheck.h>) 972 #include <ptrcheck.h> 973 #else 974 /* 975 * We intentionally define to nothing pointer attributes which do not have an 976 * impact on the ABI. __indexable and __bidi_indexable are not defined because 977 * of the ABI incompatibility that makes the diagnostic preferable. 978 */ 979 #define __has_ptrcheck 0 980 #define __single 981 #define __unsafe_indexable 982 #define __counted_by(N) 983 #define __sized_by(N) 984 #define __ended_by(E) 985 986 /* 987 * Similarly, we intentionally define to nothing the 988 * __ptrcheck_abi_assume_single and __ptrcheck_abi_assume_unsafe_indexable 989 * macros because they do not lead to an ABI incompatibility. However, we do not 990 * define the indexable and unsafe_indexable ones because the diagnostic is 991 * better than the silent ABI break. 992 */ 993 #define __ptrcheck_abi_assume_single() 994 #define __ptrcheck_abi_assume_unsafe_indexable() 995 996 /* __unsafe_forge intrinsics are defined as regular C casts. */ 997 #define __unsafe_forge_bidi_indexable(T, P, S) ((T)(P)) 998 #define __unsafe_forge_single(T, P) ((T)(P)) 999 1000 /* decay operates normally; attribute is meaningless without pointer checks. */ 1001 #define __array_decay_dicards_count_in_parameters 1002 #endif /* !__has_include(<ptrcheck.h>) */ 1003 1004 #define __ASSUME_PTR_ABI_SINGLE_BEGIN __ptrcheck_abi_assume_single() 1005 #define __ASSUME_PTR_ABI_SINGLE_END __ptrcheck_abi_assume_unsafe_indexable() 1006 1007 #if __has_ptrcheck 1008 #define __header_indexable __indexable 1009 #define __header_bidi_indexable __bidi_indexable 1010 #else 1011 #define __header_indexable 1012 #define __header_bidi_indexable 1013 #endif 1014 1015 /* 1016 * Architecture validation for current SDK 1017 */ 1018 #if !defined(__sys_cdefs_arch_unknown__) && defined(__i386__) 1019 #elif !defined(__sys_cdefs_arch_unknown__) && defined(__x86_64__) 1020 #elif !defined(__sys_cdefs_arch_unknown__) && defined(__arm__) 1021 #elif !defined(__sys_cdefs_arch_unknown__) && defined(__arm64__) 1022 #else 1023 #error Unsupported architecture 1024 #endif 1025 1026 #ifdef XNU_KERNEL_PRIVATE 1027 /* 1028 * Selectively ignore cast alignment warnings 1029 */ 1030 #define __IGNORE_WCASTALIGN(x) _Pragma("clang diagnostic push") \ 1031 _Pragma("clang diagnostic ignored \"-Wcast-align\"") \ 1032 x \ 1033 _Pragma("clang diagnostic pop") 1034 #endif 1035 1036 #if defined(PRIVATE) || defined(KERNEL) 1037 /* 1038 * Check if __probable and __improbable have already been defined elsewhere. 1039 * These macros inform the compiler (and humans) about which branches are likely 1040 * to be taken. 1041 */ 1042 #if !defined(__probable) && !defined(__improbable) 1043 #define __probable(x) __builtin_expect(!!(x), 1) 1044 #define __improbable(x) __builtin_expect(!!(x), 0) 1045 #endif /* !defined(__probable) && !defined(__improbable) */ 1046 1047 #define __container_of(ptr, type, field) __extension__({ \ 1048 const __typeof__(((type *)NULL)->field) *__ptr = (ptr); \ 1049 (type *)((uintptr_t)__ptr - offsetof(type, field)); \ 1050 }) 1051 1052 #endif /* KERNEL || PRIVATE */ 1053 1054 #define __compiler_barrier() __asm__ __volatile__("" ::: "memory") 1055 1056 #if __has_attribute(enum_extensibility) 1057 #define __enum_open __attribute__((__enum_extensibility__(open))) 1058 #define __enum_closed __attribute__((__enum_extensibility__(closed))) 1059 #else 1060 #define __enum_open 1061 #define __enum_closed 1062 #endif // __has_attribute(enum_extensibility) 1063 1064 #if __has_attribute(flag_enum) 1065 #define __enum_options __attribute__((__flag_enum__)) 1066 #else 1067 #define __enum_options 1068 #endif 1069 1070 /* 1071 * Similar to OS_ENUM/OS_CLOSED_ENUM/OS_OPTIONS/OS_CLOSED_OPTIONS 1072 * 1073 * This provides more advanced type checking on compilers supporting 1074 * the proper extensions, even in C. 1075 */ 1076 #if __has_feature(objc_fixed_enum) || __has_extension(cxx_fixed_enum) || \ 1077 __has_extension(cxx_strong_enums) 1078 #define __enum_decl(_name, _type, ...) \ 1079 typedef enum : _type __VA_ARGS__ __enum_open _name 1080 #define __enum_closed_decl(_name, _type, ...) \ 1081 typedef enum : _type __VA_ARGS__ __enum_closed _name 1082 #define __options_decl(_name, _type, ...) \ 1083 typedef enum : _type __VA_ARGS__ __enum_open __enum_options _name 1084 #define __options_closed_decl(_name, _type, ...) \ 1085 typedef enum : _type __VA_ARGS__ __enum_closed __enum_options _name 1086 #else 1087 #define __enum_decl(_name, _type, ...) \ 1088 typedef _type _name; enum __VA_ARGS__ __enum_open 1089 #define __enum_closed_decl(_name, _type, ...) \ 1090 typedef _type _name; enum __VA_ARGS__ __enum_closed 1091 #define __options_decl(_name, _type, ...) \ 1092 typedef _type _name; enum __VA_ARGS__ __enum_open __enum_options 1093 #define __options_closed_decl(_name, _type, ...) \ 1094 typedef _type _name; enum __VA_ARGS__ __enum_closed __enum_options 1095 #endif 1096 1097 #if XNU_KERNEL_PRIVATE 1098 /* 1099 * __xnu_struct_group() can be used to declare a set of fields to be grouped 1100 * together logically in order to perform safer memory operations 1101 * (assignment, zeroing, ...) on them. 1102 */ 1103 #ifdef __cplusplus 1104 #define __xnu_struct_group(group_type, group_name, ...) \ 1105 struct group_type __VA_ARGS__; \ 1106 union { \ 1107 struct __VA_ARGS__; \ 1108 struct group_type group_name; \ 1109 } 1110 #else 1111 #define __xnu_struct_group(group_type, group_name, ...) \ 1112 union { \ 1113 struct __VA_ARGS__; \ 1114 struct group_type __VA_ARGS__ group_name; \ 1115 } 1116 #endif 1117 #endif /* XNU_KERNEL_PRIVATE */ 1118 1119 #if defined(KERNEL) && __has_attribute(xnu_usage_semantics) 1120 /* 1121 * These macros can be used to annotate type definitions or scalar structure 1122 * fields to inform the compiler about which semantic they have with regards 1123 * to the content of the underlying memory represented by such type or field. 1124 * 1125 * This information is used in the analysis of the types performed by the 1126 * signature based type segregation implemented in kalloc. 1127 */ 1128 #define __kernel_ptr_semantics __attribute__((xnu_usage_semantics("pointer"))) 1129 #define __kernel_data_semantics __attribute__((xnu_usage_semantics("data"))) 1130 #define __kernel_dual_semantics __attribute__((xnu_usage_semantics("pointer", "data"))) 1131 1132 #else /* defined(KERNEL) && __has_attribute(xnu_usage_semantics) */ 1133 1134 #define __kernel_ptr_semantics 1135 #define __kernel_data_semantics 1136 #define __kernel_dual_semantics 1137 1138 #endif /* defined(KERNEL) && __has_attribute(xnu_usage_semantics) */ 1139 1140 #endif /* !_CDEFS_H_ */ 1141