1 #ifndef Py_PYPORT_H 2 #define Py_PYPORT_H 3 4 #include "pyconfig.h" /* include for defines */ 5 6 #include <inttypes.h> 7 8 #include <limits.h> 9 #ifndef UCHAR_MAX 10 # error "limits.h must define UCHAR_MAX" 11 #endif 12 #if UCHAR_MAX != 255 13 # error "Python's source code assumes C's unsigned char is an 8-bit type" 14 #endif 15 16 17 // Macro to use C++ static_cast<> in the Python C API. 18 #ifdef __cplusplus 19 # define _Py_STATIC_CAST(type, expr) static_cast<type>(expr) 20 #else 21 # define _Py_STATIC_CAST(type, expr) ((type)(expr)) 22 #endif 23 // Macro to use the more powerful/dangerous C-style cast even in C++. 24 #define _Py_CAST(type, expr) ((type)(expr)) 25 26 // Static inline functions should use _Py_NULL rather than using directly NULL 27 // to prevent C++ compiler warnings. On C++11 and newer, _Py_NULL is defined as 28 // nullptr. 29 #if defined(__cplusplus) && __cplusplus >= 201103 30 # define _Py_NULL nullptr 31 #else 32 # define _Py_NULL NULL 33 #endif 34 35 36 /* Defines to build Python and its standard library: 37 * 38 * - Py_BUILD_CORE: Build Python core. Give access to Python internals, but 39 * should not be used by third-party modules. 40 * - Py_BUILD_CORE_BUILTIN: Build a Python stdlib module as a built-in module. 41 * - Py_BUILD_CORE_MODULE: Build a Python stdlib module as a dynamic library. 42 * 43 * Py_BUILD_CORE_BUILTIN and Py_BUILD_CORE_MODULE imply Py_BUILD_CORE. 44 * 45 * On Windows, Py_BUILD_CORE_MODULE exports "PyInit_xxx" symbol, whereas 46 * Py_BUILD_CORE_BUILTIN does not. 47 */ 48 #if defined(Py_BUILD_CORE_BUILTIN) && !defined(Py_BUILD_CORE) 49 # define Py_BUILD_CORE 50 #endif 51 #if defined(Py_BUILD_CORE_MODULE) && !defined(Py_BUILD_CORE) 52 # define Py_BUILD_CORE 53 #endif 54 55 56 /************************************************************************** 57 Symbols and macros to supply platform-independent interfaces to basic 58 C language & library operations whose spellings vary across platforms. 59 60 Please try to make documentation here as clear as possible: by definition, 61 the stuff here is trying to illuminate C's darkest corners. 62 63 Config #defines referenced here: 64 65 SIGNED_RIGHT_SHIFT_ZERO_FILLS 66 Meaning: To be defined iff i>>j does not extend the sign bit when i is a 67 signed integral type and i < 0. 68 Used in: Py_ARITHMETIC_RIGHT_SHIFT 69 70 Py_DEBUG 71 Meaning: Extra checks compiled in for debug mode. 72 Used in: Py_SAFE_DOWNCAST 73 74 **************************************************************************/ 75 76 /* typedefs for some C9X-defined synonyms for integral types. 77 * 78 * The names in Python are exactly the same as the C9X names, except with a 79 * Py_ prefix. Until C9X is universally implemented, this is the only way 80 * to ensure that Python gets reliable names that don't conflict with names 81 * in non-Python code that are playing their own tricks to define the C9X 82 * names. 83 * 84 * NOTE: don't go nuts here! Python has no use for *most* of the C9X 85 * integral synonyms. Only define the ones we actually need. 86 */ 87 88 /* long long is required. Ensure HAVE_LONG_LONG is defined for compatibility. */ 89 #ifndef HAVE_LONG_LONG 90 #define HAVE_LONG_LONG 1 91 #endif 92 #ifndef PY_LONG_LONG 93 #define PY_LONG_LONG long long 94 /* If LLONG_MAX is defined in limits.h, use that. */ 95 #define PY_LLONG_MIN LLONG_MIN 96 #define PY_LLONG_MAX LLONG_MAX 97 #define PY_ULLONG_MAX ULLONG_MAX 98 #endif 99 100 #define PY_UINT32_T uint32_t 101 #define PY_UINT64_T uint64_t 102 103 /* Signed variants of the above */ 104 #define PY_INT32_T int32_t 105 #define PY_INT64_T int64_t 106 107 /* PYLONG_BITS_IN_DIGIT describes the number of bits per "digit" (limb) in the 108 * PyLongObject implementation (longintrepr.h). It's currently either 30 or 15, 109 * defaulting to 30. The 15-bit digit option may be removed in the future. 110 */ 111 #ifndef PYLONG_BITS_IN_DIGIT 112 #define PYLONG_BITS_IN_DIGIT 30 113 #endif 114 115 /* uintptr_t is the C9X name for an unsigned integral type such that a 116 * legitimate void* can be cast to uintptr_t and then back to void* again 117 * without loss of information. Similarly for intptr_t, wrt a signed 118 * integral type. 119 */ 120 typedef uintptr_t Py_uintptr_t; 121 typedef intptr_t Py_intptr_t; 122 123 /* Py_ssize_t is a signed integral type such that sizeof(Py_ssize_t) == 124 * sizeof(size_t). C99 doesn't define such a thing directly (size_t is an 125 * unsigned integral type). See PEP 353 for details. 126 * PY_SSIZE_T_MAX is the largest positive value of type Py_ssize_t. 127 */ 128 #ifdef HAVE_PY_SSIZE_T 129 130 #elif HAVE_SSIZE_T 131 typedef ssize_t Py_ssize_t; 132 # define PY_SSIZE_T_MAX SSIZE_MAX 133 #elif SIZEOF_VOID_P == SIZEOF_SIZE_T 134 typedef Py_intptr_t Py_ssize_t; 135 # define PY_SSIZE_T_MAX INTPTR_MAX 136 #else 137 # error "Python needs a typedef for Py_ssize_t in pyport.h." 138 #endif 139 140 /* Smallest negative value of type Py_ssize_t. */ 141 #define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1) 142 143 /* Py_hash_t is the same size as a pointer. */ 144 #define SIZEOF_PY_HASH_T SIZEOF_SIZE_T 145 typedef Py_ssize_t Py_hash_t; 146 /* Py_uhash_t is the unsigned equivalent needed to calculate numeric hash. */ 147 #define SIZEOF_PY_UHASH_T SIZEOF_SIZE_T 148 typedef size_t Py_uhash_t; 149 150 /* Now PY_SSIZE_T_CLEAN is mandatory. This is just for backward compatibility. */ 151 typedef Py_ssize_t Py_ssize_clean_t; 152 153 /* Largest possible value of size_t. */ 154 #define PY_SIZE_MAX SIZE_MAX 155 156 /* Macro kept for backward compatibility: use "z" in new code. 157 * 158 * PY_FORMAT_SIZE_T is a platform-specific modifier for use in a printf 159 * format to convert an argument with the width of a size_t or Py_ssize_t. 160 * C99 introduced "z" for this purpose, but old MSVCs had not supported it. 161 * Since MSVC supports "z" since (at least) 2015, we can just use "z" 162 * for new code. 163 * 164 * These "high level" Python format functions interpret "z" correctly on 165 * all platforms (Python interprets the format string itself, and does whatever 166 * the platform C requires to convert a size_t/Py_ssize_t argument): 167 * 168 * PyBytes_FromFormat 169 * PyErr_Format 170 * PyBytes_FromFormatV 171 * PyUnicode_FromFormatV 172 * 173 * Lower-level uses require that you interpolate the correct format modifier 174 * yourself (e.g., calling printf, fprintf, sprintf, PyOS_snprintf); for 175 * example, 176 * 177 * Py_ssize_t index; 178 * fprintf(stderr, "index %" PY_FORMAT_SIZE_T "d sucks\n", index); 179 * 180 * That will expand to %zd or to something else correct for a Py_ssize_t on 181 * the platform. 182 */ 183 #ifndef PY_FORMAT_SIZE_T 184 # define PY_FORMAT_SIZE_T "z" 185 #endif 186 187 /* Py_LOCAL can be used instead of static to get the fastest possible calling 188 * convention for functions that are local to a given module. 189 * 190 * Py_LOCAL_INLINE does the same thing, and also explicitly requests inlining, 191 * for platforms that support that. 192 * 193 * NOTE: You can only use this for functions that are entirely local to a 194 * module; functions that are exported via method tables, callbacks, etc, 195 * should keep using static. 196 */ 197 198 #if defined(_MSC_VER) 199 /* ignore warnings if the compiler decides not to inline a function */ 200 # pragma warning(disable: 4710) 201 /* fastest possible local call under MSVC */ 202 # define Py_LOCAL(type) static type __fastcall 203 # define Py_LOCAL_INLINE(type) static __inline type __fastcall 204 #else 205 # define Py_LOCAL(type) static type 206 # define Py_LOCAL_INLINE(type) static inline type 207 #endif 208 209 // bpo-28126: Py_MEMCPY is kept for backwards compatibility, 210 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000 211 # define Py_MEMCPY memcpy 212 #endif 213 214 #ifdef HAVE_IEEEFP_H 215 #include <ieeefp.h> /* needed for 'finite' declaration on some platforms */ 216 #endif 217 218 #include <math.h> /* Moved here from the math section, before extern "C" */ 219 220 /******************************************** 221 * WRAPPER FOR <time.h> and/or <sys/time.h> * 222 ********************************************/ 223 224 #ifdef HAVE_SYS_TIME_H 225 #include <sys/time.h> 226 #endif 227 #include <time.h> 228 229 /****************************** 230 * WRAPPER FOR <sys/select.h> * 231 ******************************/ 232 233 /* NB caller must include <sys/types.h> */ 234 235 #ifdef HAVE_SYS_SELECT_H 236 #include <sys/select.h> 237 #endif /* !HAVE_SYS_SELECT_H */ 238 239 /******************************* 240 * stat() and fstat() fiddling * 241 *******************************/ 242 243 #ifdef HAVE_SYS_STAT_H 244 #include <sys/stat.h> 245 #elif defined(HAVE_STAT_H) 246 #include <stat.h> 247 #endif 248 249 #ifndef S_IFMT 250 /* VisualAge C/C++ Failed to Define MountType Field in sys/stat.h */ 251 #define S_IFMT 0170000 252 #endif 253 254 #ifndef S_IFLNK 255 /* Windows doesn't define S_IFLNK but posixmodule.c maps 256 * IO_REPARSE_TAG_SYMLINK to S_IFLNK */ 257 # define S_IFLNK 0120000 258 #endif 259 260 #ifndef S_ISREG 261 #define S_ISREG(x) (((x) & S_IFMT) == S_IFREG) 262 #endif 263 264 #ifndef S_ISDIR 265 #define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR) 266 #endif 267 268 #ifndef S_ISCHR 269 #define S_ISCHR(x) (((x) & S_IFMT) == S_IFCHR) 270 #endif 271 272 #ifdef __cplusplus 273 /* Move this down here since some C++ #include's don't like to be included 274 inside an extern "C" */ 275 extern "C" { 276 #endif 277 278 279 /* Py_ARITHMETIC_RIGHT_SHIFT 280 * C doesn't define whether a right-shift of a signed integer sign-extends 281 * or zero-fills. Here a macro to force sign extension: 282 * Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) 283 * Return I >> J, forcing sign extension. Arithmetically, return the 284 * floor of I/2**J. 285 * Requirements: 286 * I should have signed integer type. In the terminology of C99, this can 287 * be either one of the five standard signed integer types (signed char, 288 * short, int, long, long long) or an extended signed integer type. 289 * J is an integer >= 0 and strictly less than the number of bits in the 290 * type of I (because C doesn't define what happens for J outside that 291 * range either). 292 * TYPE used to specify the type of I, but is now ignored. It's been left 293 * in for backwards compatibility with versions <= 2.6 or 3.0. 294 * Caution: 295 * I may be evaluated more than once. 296 */ 297 #ifdef SIGNED_RIGHT_SHIFT_ZERO_FILLS 298 #define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) \ 299 ((I) < 0 ? -1-((-1-(I)) >> (J)) : (I) >> (J)) 300 #else 301 #define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) ((I) >> (J)) 302 #endif 303 304 /* Py_FORCE_EXPANSION(X) 305 * "Simply" returns its argument. However, macro expansions within the 306 * argument are evaluated. This unfortunate trickery is needed to get 307 * token-pasting to work as desired in some cases. 308 */ 309 #define Py_FORCE_EXPANSION(X) X 310 311 /* Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) 312 * Cast VALUE to type NARROW from type WIDE. In Py_DEBUG mode, this 313 * assert-fails if any information is lost. 314 * Caution: 315 * VALUE may be evaluated more than once. 316 */ 317 #ifdef Py_DEBUG 318 # define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) \ 319 (assert(_Py_STATIC_CAST(WIDE, _Py_STATIC_CAST(NARROW, (VALUE))) == (VALUE)), \ 320 _Py_STATIC_CAST(NARROW, (VALUE))) 321 #else 322 # define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) _Py_STATIC_CAST(NARROW, (VALUE)) 323 #endif 324 325 326 /* Py_DEPRECATED(version) 327 * Declare a variable, type, or function deprecated. 328 * The macro must be placed before the declaration. 329 * Usage: 330 * Py_DEPRECATED(3.3) extern int old_var; 331 * Py_DEPRECATED(3.4) typedef int T1; 332 * Py_DEPRECATED(3.8) PyAPI_FUNC(int) Py_OldFunction(void); 333 */ 334 #if defined(__GNUC__) \ 335 && ((__GNUC__ >= 4) || (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)) 336 #define Py_DEPRECATED(VERSION_UNUSED) __attribute__((__deprecated__)) 337 #elif defined(_MSC_VER) 338 #define Py_DEPRECATED(VERSION) __declspec(deprecated( \ 339 "deprecated in " #VERSION)) 340 #else 341 #define Py_DEPRECATED(VERSION_UNUSED) 342 #endif 343 344 #if defined(__clang__) 345 #define _Py_COMP_DIAG_PUSH _Pragma("clang diagnostic push") 346 #define _Py_COMP_DIAG_IGNORE_DEPR_DECLS \ 347 _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"") 348 #define _Py_COMP_DIAG_POP _Pragma("clang diagnostic pop") 349 #elif defined(__GNUC__) \ 350 && ((__GNUC__ >= 5) || (__GNUC__ == 4) && (__GNUC_MINOR__ >= 6)) 351 #define _Py_COMP_DIAG_PUSH _Pragma("GCC diagnostic push") 352 #define _Py_COMP_DIAG_IGNORE_DEPR_DECLS \ 353 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 354 #define _Py_COMP_DIAG_POP _Pragma("GCC diagnostic pop") 355 #elif defined(_MSC_VER) 356 #define _Py_COMP_DIAG_PUSH __pragma(warning(push)) 357 #define _Py_COMP_DIAG_IGNORE_DEPR_DECLS __pragma(warning(disable: 4996)) 358 #define _Py_COMP_DIAG_POP __pragma(warning(pop)) 359 #else 360 #define _Py_COMP_DIAG_PUSH 361 #define _Py_COMP_DIAG_IGNORE_DEPR_DECLS 362 #define _Py_COMP_DIAG_POP 363 #endif 364 365 /* _Py_HOT_FUNCTION 366 * The hot attribute on a function is used to inform the compiler that the 367 * function is a hot spot of the compiled program. The function is optimized 368 * more aggressively and on many target it is placed into special subsection of 369 * the text section so all hot functions appears close together improving 370 * locality. 371 * 372 * Usage: 373 * int _Py_HOT_FUNCTION x(void) { return 3; } 374 * 375 * Issue #28618: This attribute must not be abused, otherwise it can have a 376 * negative effect on performance. Only the functions were Python spend most of 377 * its time must use it. Use a profiler when running performance benchmark 378 * suite to find these functions. 379 */ 380 #if defined(__GNUC__) \ 381 && ((__GNUC__ >= 5) || (__GNUC__ == 4) && (__GNUC_MINOR__ >= 3)) 382 #define _Py_HOT_FUNCTION __attribute__((hot)) 383 #else 384 #define _Py_HOT_FUNCTION 385 #endif 386 387 // Ask the compiler to always inline a static inline function. The compiler can 388 // ignore it and decides to not inline the function. 389 // 390 // It can be used to inline performance critical static inline functions when 391 // building Python in debug mode with function inlining disabled. For example, 392 // MSC disables function inlining when building in debug mode. 393 // 394 // Marking blindly a static inline function with Py_ALWAYS_INLINE can result in 395 // worse performances (due to increased code size for example). The compiler is 396 // usually smarter than the developer for the cost/benefit analysis. 397 // 398 // If Python is built in debug mode (if the Py_DEBUG macro is defined), the 399 // Py_ALWAYS_INLINE macro does nothing. 400 // 401 // It must be specified before the function return type. Usage: 402 // 403 // static inline Py_ALWAYS_INLINE int random(void) { return 4; } 404 #if defined(Py_DEBUG) 405 // If Python is built in debug mode, usually compiler optimizations are 406 // disabled. In this case, Py_ALWAYS_INLINE can increase a lot the stack 407 // memory usage. For example, forcing inlining using gcc -O0 increases the 408 // stack usage from 6 KB to 15 KB per Python function call. 409 # define Py_ALWAYS_INLINE 410 #elif defined(__GNUC__) || defined(__clang__) || defined(__INTEL_COMPILER) 411 # define Py_ALWAYS_INLINE __attribute__((always_inline)) 412 #elif defined(_MSC_VER) 413 # define Py_ALWAYS_INLINE __forceinline 414 #else 415 # define Py_ALWAYS_INLINE 416 #endif 417 418 // Py_NO_INLINE 419 // Disable inlining on a function. For example, it reduces the C stack 420 // consumption: useful on LTO+PGO builds which heavily inline code (see 421 // bpo-33720). 422 // 423 // Usage: 424 // 425 // Py_NO_INLINE static int random(void) { return 4; } 426 #if defined(__GNUC__) || defined(__clang__) || defined(__INTEL_COMPILER) 427 # define Py_NO_INLINE __attribute__ ((noinline)) 428 #elif defined(_MSC_VER) 429 # define Py_NO_INLINE __declspec(noinline) 430 #else 431 # define Py_NO_INLINE 432 #endif 433 434 /************************************************************************** 435 Prototypes that are missing from the standard include files on some systems 436 (and possibly only some versions of such systems.) 437 438 Please be conservative with adding new ones, document them and enclose them 439 in platform-specific #ifdefs. 440 **************************************************************************/ 441 442 #ifdef SOLARIS 443 /* Unchecked */ 444 extern int gethostname(char *, int); 445 #endif 446 447 #ifdef HAVE__GETPTY 448 #include <sys/types.h> /* we need to import mode_t */ 449 extern char * _getpty(int *, int, mode_t, int); 450 #endif 451 452 /* On QNX 6, struct termio must be declared by including sys/termio.h 453 if TCGETA, TCSETA, TCSETAW, or TCSETAF are used. sys/termio.h must 454 be included before termios.h or it will generate an error. */ 455 #if defined(HAVE_SYS_TERMIO_H) && !defined(__hpux) 456 #include <sys/termio.h> 457 #endif 458 459 460 /* On 4.4BSD-descendants, ctype functions serves the whole range of 461 * wchar_t character set rather than single byte code points only. 462 * This characteristic can break some operations of string object 463 * including str.upper() and str.split() on UTF-8 locales. This 464 * workaround was provided by Tim Robbins of FreeBSD project. 465 */ 466 467 #if defined(__APPLE__) 468 # define _PY_PORT_CTYPE_UTF8_ISSUE 469 #endif 470 471 #ifdef _PY_PORT_CTYPE_UTF8_ISSUE 472 #ifndef __cplusplus 473 /* The workaround below is unsafe in C++ because 474 * the <locale> defines these symbols as real functions, 475 * with a slightly different signature. 476 * See issue #10910 477 */ 478 #include <ctype.h> 479 #include <wctype.h> 480 #undef isalnum 481 #define isalnum(c) iswalnum(btowc(c)) 482 #undef isalpha 483 #define isalpha(c) iswalpha(btowc(c)) 484 #undef islower 485 #define islower(c) iswlower(btowc(c)) 486 #undef isspace 487 #define isspace(c) iswspace(btowc(c)) 488 #undef isupper 489 #define isupper(c) iswupper(btowc(c)) 490 #undef tolower 491 #define tolower(c) towlower(btowc(c)) 492 #undef toupper 493 #define toupper(c) towupper(btowc(c)) 494 #endif 495 #endif 496 497 498 /* Declarations for symbol visibility. 499 500 PyAPI_FUNC(type): Declares a public Python API function and return type 501 PyAPI_DATA(type): Declares public Python data and its type 502 PyMODINIT_FUNC: A Python module init function. If these functions are 503 inside the Python core, they are private to the core. 504 If in an extension module, it may be declared with 505 external linkage depending on the platform. 506 507 As a number of platforms support/require "__declspec(dllimport/dllexport)", 508 we support a HAVE_DECLSPEC_DLL macro to save duplication. 509 */ 510 511 /* 512 All windows ports, except cygwin, are handled in PC/pyconfig.h. 513 514 Cygwin is the only other autoconf platform requiring special 515 linkage handling and it uses __declspec(). 516 */ 517 #if defined(__CYGWIN__) 518 # define HAVE_DECLSPEC_DLL 519 #endif 520 521 #include "exports.h" 522 523 /* only get special linkage if built as shared or platform is Cygwin */ 524 #if defined(Py_ENABLE_SHARED) || defined(__CYGWIN__) 525 # if defined(HAVE_DECLSPEC_DLL) 526 # if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE) 527 # define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE 528 # define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE 529 /* module init functions inside the core need no external linkage */ 530 /* except for Cygwin to handle embedding */ 531 # if defined(__CYGWIN__) 532 # define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject* 533 # else /* __CYGWIN__ */ 534 # define PyMODINIT_FUNC PyObject* 535 # endif /* __CYGWIN__ */ 536 # else /* Py_BUILD_CORE */ 537 /* Building an extension module, or an embedded situation */ 538 /* public Python functions and data are imported */ 539 /* Under Cygwin, auto-import functions to prevent compilation */ 540 /* failures similar to those described at the bottom of 4.1: */ 541 /* http://docs.python.org/extending/windows.html#a-cookbook-approach */ 542 # if !defined(__CYGWIN__) 543 # define PyAPI_FUNC(RTYPE) Py_IMPORTED_SYMBOL RTYPE 544 # endif /* !__CYGWIN__ */ 545 # define PyAPI_DATA(RTYPE) extern Py_IMPORTED_SYMBOL RTYPE 546 /* module init functions outside the core must be exported */ 547 # if defined(__cplusplus) 548 # define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject* 549 # else /* __cplusplus */ 550 # define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject* 551 # endif /* __cplusplus */ 552 # endif /* Py_BUILD_CORE */ 553 # endif /* HAVE_DECLSPEC_DLL */ 554 #endif /* Py_ENABLE_SHARED */ 555 556 /* If no external linkage macros defined by now, create defaults */ 557 #ifndef PyAPI_FUNC 558 # define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE 559 #endif 560 #ifndef PyAPI_DATA 561 # define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE 562 #endif 563 #ifndef PyMODINIT_FUNC 564 # if defined(__cplusplus) 565 # define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject* 566 # else /* __cplusplus */ 567 # define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject* 568 # endif /* __cplusplus */ 569 #endif 570 571 /* limits.h constants that may be missing */ 572 573 #ifndef INT_MAX 574 #define INT_MAX 2147483647 575 #endif 576 577 #ifndef LONG_MAX 578 #if SIZEOF_LONG == 4 579 #define LONG_MAX 0X7FFFFFFFL 580 #elif SIZEOF_LONG == 8 581 #define LONG_MAX 0X7FFFFFFFFFFFFFFFL 582 #else 583 #error "could not set LONG_MAX in pyport.h" 584 #endif 585 #endif 586 587 #ifndef LONG_MIN 588 #define LONG_MIN (-LONG_MAX-1) 589 #endif 590 591 #ifndef LONG_BIT 592 #define LONG_BIT (8 * SIZEOF_LONG) 593 #endif 594 595 #if LONG_BIT != 8 * SIZEOF_LONG 596 /* 04-Oct-2000 LONG_BIT is apparently (mis)defined as 64 on some recent 597 * 32-bit platforms using gcc. We try to catch that here at compile-time 598 * rather than waiting for integer multiplication to trigger bogus 599 * overflows. 600 */ 601 #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)." 602 #endif 603 604 #ifdef __cplusplus 605 } 606 #endif 607 608 /* 609 * Hide GCC attributes from compilers that don't support them. 610 */ 611 #if (!defined(__GNUC__) || __GNUC__ < 2 || \ 612 (__GNUC__ == 2 && __GNUC_MINOR__ < 7) ) 613 #define Py_GCC_ATTRIBUTE(x) 614 #else 615 #define Py_GCC_ATTRIBUTE(x) __attribute__(x) 616 #endif 617 618 /* 619 * Specify alignment on compilers that support it. 620 */ 621 #if defined(__GNUC__) && __GNUC__ >= 3 622 #define Py_ALIGNED(x) __attribute__((aligned(x))) 623 #else 624 #define Py_ALIGNED(x) 625 #endif 626 627 /* Eliminate end-of-loop code not reached warnings from SunPro C 628 * when using do{...}while(0) macros 629 */ 630 #ifdef __SUNPRO_C 631 #pragma error_messages (off,E_END_OF_LOOP_CODE_NOT_REACHED) 632 #endif 633 634 #ifndef Py_LL 635 #define Py_LL(x) x##LL 636 #endif 637 638 #ifndef Py_ULL 639 #define Py_ULL(x) Py_LL(x##U) 640 #endif 641 642 #define Py_VA_COPY va_copy 643 644 /* 645 * Convenient macros to deal with endianness of the platform. WORDS_BIGENDIAN is 646 * detected by configure and defined in pyconfig.h. The code in pyconfig.h 647 * also takes care of Apple's universal builds. 648 */ 649 650 #ifdef WORDS_BIGENDIAN 651 # define PY_BIG_ENDIAN 1 652 # define PY_LITTLE_ENDIAN 0 653 #else 654 # define PY_BIG_ENDIAN 0 655 # define PY_LITTLE_ENDIAN 1 656 #endif 657 658 #ifdef __ANDROID__ 659 /* The Android langinfo.h header is not used. */ 660 # undef HAVE_LANGINFO_H 661 # undef CODESET 662 #endif 663 664 /* Maximum value of the Windows DWORD type */ 665 #define PY_DWORD_MAX 4294967295U 666 667 /* This macro used to tell whether Python was built with multithreading 668 * enabled. Now multithreading is always enabled, but keep the macro 669 * for compatibility. 670 */ 671 #ifndef WITH_THREAD 672 # define WITH_THREAD 673 #endif 674 675 /* Check that ALT_SOABI is consistent with Py_TRACE_REFS: 676 ./configure --with-trace-refs should must be used to define Py_TRACE_REFS */ 677 #if defined(ALT_SOABI) && defined(Py_TRACE_REFS) 678 # error "Py_TRACE_REFS ABI is not compatible with release and debug ABI" 679 #endif 680 681 #if defined(__ANDROID__) || defined(__VXWORKS__) 682 // Use UTF-8 as the locale encoding, ignore the LC_CTYPE locale. 683 // See _Py_GetLocaleEncoding(), PyUnicode_DecodeLocale() 684 // and PyUnicode_EncodeLocale(). 685 # define _Py_FORCE_UTF8_LOCALE 686 #endif 687 688 #if defined(_Py_FORCE_UTF8_LOCALE) || defined(__APPLE__) 689 // Use UTF-8 as the filesystem encoding. 690 // See PyUnicode_DecodeFSDefaultAndSize(), PyUnicode_EncodeFSDefault(), 691 // Py_DecodeLocale() and Py_EncodeLocale(). 692 # define _Py_FORCE_UTF8_FS_ENCODING 693 #endif 694 695 /* Mark a function which cannot return. Example: 696 PyAPI_FUNC(void) _Py_NO_RETURN PyThread_exit_thread(void); 697 698 XLC support is intentionally omitted due to bpo-40244 */ 699 #ifndef _Py_NO_RETURN 700 #if defined(__clang__) || \ 701 (defined(__GNUC__) && \ 702 ((__GNUC__ >= 3) || \ 703 (__GNUC__ == 2) && (__GNUC_MINOR__ >= 5))) 704 # define _Py_NO_RETURN __attribute__((__noreturn__)) 705 #elif defined(_MSC_VER) 706 # define _Py_NO_RETURN __declspec(noreturn) 707 #else 708 # define _Py_NO_RETURN 709 #endif 710 #endif 711 712 713 // Preprocessor check for a builtin preprocessor function. Always return 0 714 // if __has_builtin() macro is not defined. 715 // 716 // __has_builtin() is available on clang and GCC 10. 717 #ifdef __has_builtin 718 # define _Py__has_builtin(x) __has_builtin(x) 719 #else 720 # define _Py__has_builtin(x) 0 721 #endif 722 723 724 /* A convenient way for code to know if sanitizers are enabled. */ 725 #if defined(__has_feature) 726 # if __has_feature(memory_sanitizer) 727 # if !defined(_Py_MEMORY_SANITIZER) 728 # define _Py_MEMORY_SANITIZER 729 # endif 730 # endif 731 # if __has_feature(address_sanitizer) 732 # if !defined(_Py_ADDRESS_SANITIZER) 733 # define _Py_ADDRESS_SANITIZER 734 # endif 735 # endif 736 #elif defined(__GNUC__) 737 # if defined(__SANITIZE_ADDRESS__) 738 # define _Py_ADDRESS_SANITIZER 739 # endif 740 #endif 741 742 #endif /* Py_PYPORT_H */ 743