1 /* 2 * OS includes and handling of OS dependencies 3 * 4 * This header exists to pull in some common system headers that 5 * most code in QEMU will want, and to fix up some possible issues with 6 * it (missing defines, Windows weirdness, and so on). 7 * 8 * To avoid getting into possible circular include dependencies, this 9 * file should not include any other QEMU headers, with the exceptions 10 * of config-host.h, config-target.h, qemu/compiler.h, 11 * sysemu/os-posix.h, sysemu/os-win32.h, glib-compat.h and 12 * qemu/typedefs.h, all of which are doing a similar job to this file 13 * and are under similar constraints. 14 * 15 * This header also contains prototypes for functions defined in 16 * os-*.c and util/oslib-*.c; those would probably be better split 17 * out into separate header files. 18 * 19 * In an ideal world this header would contain only: 20 * (1) things which everybody needs 21 * (2) things without which code would work on most platforms but 22 * fail to compile or misbehave on a minority of host OSes 23 * 24 * This work is licensed under the terms of the GNU GPL, version 2 or later. 25 * See the COPYING file in the top-level directory. 26 */ 27 #ifndef QEMU_OSDEP_H 28 #define QEMU_OSDEP_H 29 30 #include "config-host.h" 31 #ifdef NEED_CPU_H 32 #include CONFIG_TARGET 33 #else 34 #include "exec/poison.h" 35 #endif 36 37 #include "qemu/compiler.h" 38 39 /* Older versions of C++ don't get definitions of various macros from 40 * stdlib.h unless we define these macros before first inclusion of 41 * that system header. 42 */ 43 #ifndef __STDC_CONSTANT_MACROS 44 #define __STDC_CONSTANT_MACROS 45 #endif 46 #ifndef __STDC_LIMIT_MACROS 47 #define __STDC_LIMIT_MACROS 48 #endif 49 #ifndef __STDC_FORMAT_MACROS 50 #define __STDC_FORMAT_MACROS 51 #endif 52 53 /* The following block of code temporarily renames the daemon() function so the 54 * compiler does not see the warning associated with it in stdlib.h on OSX 55 */ 56 #ifdef __APPLE__ 57 #define daemon qemu_fake_daemon_function 58 #include <stdlib.h> 59 #undef daemon 60 QEMU_EXTERN_C int daemon(int, int); 61 #endif 62 63 #ifdef _WIN32 64 /* as defined in sdkddkver.h */ 65 #ifndef _WIN32_WINNT 66 #define _WIN32_WINNT 0x0600 /* Vista */ 67 #endif 68 /* reduces the number of implicitly included headers */ 69 #ifndef WIN32_LEAN_AND_MEAN 70 #define WIN32_LEAN_AND_MEAN 71 #endif 72 #endif 73 74 /* enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later) */ 75 #ifdef __MINGW32__ 76 #define __USE_MINGW_ANSI_STDIO 1 77 #endif 78 79 #include <stdarg.h> 80 #include <stddef.h> 81 #include <stdbool.h> 82 #include <stdint.h> 83 #include <sys/types.h> 84 #include <stdlib.h> 85 #include <stdio.h> 86 87 #include <string.h> 88 #include <strings.h> 89 #include <inttypes.h> 90 #include <limits.h> 91 /* Put unistd.h before time.h as that triggers localtime_r/gmtime_r 92 * function availability on recentish Mingw-w64 platforms. */ 93 #include <unistd.h> 94 #include <time.h> 95 #include <ctype.h> 96 #include <errno.h> 97 #include <fcntl.h> 98 #include <getopt.h> 99 #include <sys/stat.h> 100 #include <sys/time.h> 101 #include <assert.h> 102 /* setjmp must be declared before sysemu/os-win32.h 103 * because it is redefined there. */ 104 #include <setjmp.h> 105 #include <signal.h> 106 107 #ifdef CONFIG_IOVEC 108 #include <sys/uio.h> 109 #endif 110 111 #if defined(__linux__) && defined(__sparc__) 112 /* The SPARC definition of QEMU_VMALLOC_ALIGN needs SHMLBA */ 113 #include <sys/shm.h> 114 #endif 115 116 #ifndef _WIN32 117 #include <sys/wait.h> 118 #else 119 #define WIFEXITED(x) 1 120 #define WEXITSTATUS(x) (x) 121 #endif 122 123 #ifdef __APPLE__ 124 #include <AvailabilityMacros.h> 125 #endif 126 127 /* 128 * This is somewhat like a system header; it must be outside any extern "C" 129 * block because it includes system headers itself, including glib.h, 130 * which will not compile if inside an extern "C" block. 131 */ 132 #include "glib-compat.h" 133 134 #ifdef _WIN32 135 #include "sysemu/os-win32.h" 136 #endif 137 138 #ifdef CONFIG_POSIX 139 #include "sysemu/os-posix.h" 140 #endif 141 142 #ifdef __cplusplus 143 extern "C" { 144 #endif 145 146 #include "qemu/typedefs.h" 147 148 /* 149 * For mingw, as of v6.0.0, the function implementing the assert macro is 150 * not marked as noreturn, so the compiler cannot delete code following an 151 * assert(false) as unused. We rely on this within the code base to delete 152 * code that is unreachable when features are disabled. 153 * All supported versions of Glib's g_assert() satisfy this requirement. 154 */ 155 #ifdef __MINGW32__ 156 #undef assert 157 #define assert(x) g_assert(x) 158 #endif 159 160 /* 161 * According to waitpid man page: 162 * WCOREDUMP 163 * This macro is not specified in POSIX.1-2001 and is not 164 * available on some UNIX implementations (e.g., AIX, SunOS). 165 * Therefore, enclose its use inside #ifdef WCOREDUMP ... #endif. 166 */ 167 #ifndef WCOREDUMP 168 #define WCOREDUMP(status) 0 169 #endif 170 /* 171 * We have a lot of unaudited code that may fail in strange ways, or 172 * even be a security risk during migration, if you disable assertions 173 * at compile-time. You may comment out these safety checks if you 174 * absolutely want to disable assertion overhead, but it is not 175 * supported upstream so the risk is all yours. Meanwhile, please 176 * submit patches to remove any side-effects inside an assertion, or 177 * fixing error handling that should use Error instead of assert. 178 */ 179 #ifdef NDEBUG 180 #error building with NDEBUG is not supported 181 #endif 182 #ifdef G_DISABLE_ASSERT 183 #error building with G_DISABLE_ASSERT is not supported 184 #endif 185 186 #ifndef O_LARGEFILE 187 #define O_LARGEFILE 0 188 #endif 189 #ifndef O_BINARY 190 #define O_BINARY 0 191 #endif 192 #ifndef MAP_ANONYMOUS 193 #define MAP_ANONYMOUS MAP_ANON 194 #endif 195 #ifndef MAP_FIXED_NOREPLACE 196 #define MAP_FIXED_NOREPLACE 0 197 #endif 198 #ifndef MAP_NORESERVE 199 #define MAP_NORESERVE 0 200 #endif 201 #ifndef ENOMEDIUM 202 #define ENOMEDIUM ENODEV 203 #endif 204 #if !defined(ENOTSUP) 205 #define ENOTSUP 4096 206 #endif 207 #if !defined(ECANCELED) 208 #define ECANCELED 4097 209 #endif 210 #if !defined(EMEDIUMTYPE) 211 #define EMEDIUMTYPE 4098 212 #endif 213 #if !defined(ESHUTDOWN) 214 #define ESHUTDOWN 4099 215 #endif 216 217 /* time_t may be either 32 or 64 bits depending on the host OS, and 218 * can be either signed or unsigned, so we can't just hardcode a 219 * specific maximum value. This is not a C preprocessor constant, 220 * so you can't use TIME_MAX in an #ifdef, but for our purposes 221 * this isn't a problem. 222 */ 223 224 /* The macros TYPE_SIGNED, TYPE_WIDTH, and TYPE_MAXIMUM are from 225 * Gnulib, and are under the LGPL v2.1 or (at your option) any 226 * later version. 227 */ 228 229 /* True if the real type T is signed. */ 230 #define TYPE_SIGNED(t) (!((t)0 < (t)-1)) 231 232 /* The width in bits of the integer type or expression T. 233 * Padding bits are not supported. 234 */ 235 #define TYPE_WIDTH(t) (sizeof(t) * CHAR_BIT) 236 237 /* The maximum and minimum values for the integer type T. */ 238 #define TYPE_MAXIMUM(t) \ 239 ((t) (!TYPE_SIGNED(t) \ 240 ? (t)-1 \ 241 : ((((t)1 << (TYPE_WIDTH(t) - 2)) - 1) * 2 + 1))) 242 243 #ifndef TIME_MAX 244 #define TIME_MAX TYPE_MAXIMUM(time_t) 245 #endif 246 247 /* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with 248 * the wrong type. Our replacement isn't usable in preprocessor 249 * expressions, but it is sufficient for our needs. */ 250 #ifdef HAVE_BROKEN_SIZE_MAX 251 #undef SIZE_MAX 252 #define SIZE_MAX ((size_t)-1) 253 #endif 254 255 /* 256 * Two variations of MIN/MAX macros. The first is for runtime use, and 257 * evaluates arguments only once (so it is safe even with side 258 * effects), but will not work in constant contexts (such as array 259 * size declarations) because of the '{}'. The second is for constant 260 * expression use, where evaluating arguments twice is safe because 261 * the result is going to be constant anyway, but will not work in a 262 * runtime context because of a void expression where a value is 263 * expected. Thus, both gcc and clang will fail to compile if you use 264 * the wrong macro (even if the error may seem a bit cryptic). 265 * 266 * Note that neither form is usable as an #if condition; if you truly 267 * need to write conditional code that depends on a minimum or maximum 268 * determined by the pre-processor instead of the compiler, you'll 269 * have to open-code it. Sadly, Coverity is severely confused by the 270 * constant variants, so we have to dumb things down there. 271 */ 272 #undef MIN 273 #define MIN(a, b) \ 274 ({ \ 275 typeof(1 ? (a) : (b)) _a = (a), _b = (b); \ 276 _a < _b ? _a : _b; \ 277 }) 278 #undef MAX 279 #define MAX(a, b) \ 280 ({ \ 281 typeof(1 ? (a) : (b)) _a = (a), _b = (b); \ 282 _a > _b ? _a : _b; \ 283 }) 284 285 #ifdef __COVERITY__ 286 # define MIN_CONST(a, b) ((a) < (b) ? (a) : (b)) 287 # define MAX_CONST(a, b) ((a) > (b) ? (a) : (b)) 288 #else 289 # define MIN_CONST(a, b) \ 290 __builtin_choose_expr( \ 291 __builtin_constant_p(a) && __builtin_constant_p(b), \ 292 (a) < (b) ? (a) : (b), \ 293 ((void)0)) 294 # define MAX_CONST(a, b) \ 295 __builtin_choose_expr( \ 296 __builtin_constant_p(a) && __builtin_constant_p(b), \ 297 (a) > (b) ? (a) : (b), \ 298 ((void)0)) 299 #endif 300 301 /* 302 * Minimum function that returns zero only if both values are zero. 303 * Intended for use with unsigned values only. 304 */ 305 #ifndef MIN_NON_ZERO 306 #define MIN_NON_ZERO(a, b) \ 307 ({ \ 308 typeof(1 ? (a) : (b)) _a = (a), _b = (b); \ 309 _a == 0 ? _b : (_b == 0 || _b > _a) ? _a : _b; \ 310 }) 311 #endif 312 313 /* 314 * Round number down to multiple. Safe when m is not a power of 2 (see 315 * ROUND_DOWN for a faster version when a power of 2 is guaranteed). 316 */ 317 #define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m)) 318 319 /* 320 * Round number up to multiple. Safe when m is not a power of 2 (see 321 * ROUND_UP for a faster version when a power of 2 is guaranteed). 322 */ 323 #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m)) 324 325 /* Check if n is a multiple of m */ 326 #define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) 327 328 /* n-byte align pointer down */ 329 #define QEMU_ALIGN_PTR_DOWN(p, n) \ 330 ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) 331 332 /* n-byte align pointer up */ 333 #define QEMU_ALIGN_PTR_UP(p, n) \ 334 ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) 335 336 /* Check if pointer p is n-bytes aligned */ 337 #define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) 338 339 /* 340 * Round number down to multiple. Requires that d be a power of 2 (see 341 * QEMU_ALIGN_UP for a safer but slower version on arbitrary 342 * numbers); works even if d is a smaller type than n. 343 */ 344 #ifndef ROUND_DOWN 345 #define ROUND_DOWN(n, d) ((n) & -(0 ? (n) : (d))) 346 #endif 347 348 /* 349 * Round number up to multiple. Requires that d be a power of 2 (see 350 * QEMU_ALIGN_UP for a safer but slower version on arbitrary 351 * numbers); works even if d is a smaller type than n. 352 */ 353 #ifndef ROUND_UP 354 #define ROUND_UP(n, d) ROUND_DOWN((n) + (d) - 1, (d)) 355 #endif 356 357 #ifndef DIV_ROUND_UP 358 #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) 359 #endif 360 361 /* 362 * &(x)[0] is always a pointer - if it's same type as x then the argument is a 363 * pointer, not an array. 364 */ 365 #define QEMU_IS_ARRAY(x) (!__builtin_types_compatible_p(typeof(x), \ 366 typeof(&(x)[0]))) 367 #ifndef ARRAY_SIZE 368 #define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0])) + \ 369 QEMU_BUILD_BUG_ON_ZERO(!QEMU_IS_ARRAY(x))) 370 #endif 371 372 int qemu_daemon(int nochdir, int noclose); 373 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared, 374 bool noreserve); 375 void qemu_anon_ram_free(void *ptr, size_t size); 376 377 #ifdef _WIN32 378 #define HAVE_CHARDEV_SERIAL 1 379 #elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ 380 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ 381 || defined(__GLIBC__) || defined(__APPLE__) 382 #define HAVE_CHARDEV_SERIAL 1 383 #endif 384 385 #if defined(__linux__) || defined(__FreeBSD__) || \ 386 defined(__FreeBSD_kernel__) || defined(__DragonFly__) 387 #define HAVE_CHARDEV_PARPORT 1 388 #endif 389 390 #if defined(__HAIKU__) 391 #define SIGIO SIGPOLL 392 #endif 393 394 #ifdef HAVE_MADVISE_WITHOUT_PROTOTYPE 395 /* 396 * See MySQL bug #7156 (http://bugs.mysql.com/bug.php?id=7156) for discussion 397 * about Solaris missing the madvise() prototype. 398 */ 399 extern int madvise(char *, size_t, int); 400 #endif 401 402 #if defined(CONFIG_LINUX) 403 #ifndef BUS_MCEERR_AR 404 #define BUS_MCEERR_AR 4 405 #endif 406 #ifndef BUS_MCEERR_AO 407 #define BUS_MCEERR_AO 5 408 #endif 409 #endif 410 411 #if defined(__linux__) && \ 412 (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \ 413 || defined(__powerpc64__)) 414 /* Use 2 MiB alignment so transparent hugepages can be used by KVM. 415 Valgrind does not support alignments larger than 1 MiB, 416 therefore we need special code which handles running on Valgrind. */ 417 # define QEMU_VMALLOC_ALIGN (512 * 4096) 418 #elif defined(__linux__) && defined(__s390x__) 419 /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */ 420 # define QEMU_VMALLOC_ALIGN (256 * 4096) 421 #elif defined(__linux__) && defined(__sparc__) 422 # define QEMU_VMALLOC_ALIGN MAX(qemu_real_host_page_size, SHMLBA) 423 #else 424 # define QEMU_VMALLOC_ALIGN qemu_real_host_page_size 425 #endif 426 427 #ifdef CONFIG_POSIX 428 struct qemu_signalfd_siginfo { 429 uint32_t ssi_signo; /* Signal number */ 430 int32_t ssi_errno; /* Error number (unused) */ 431 int32_t ssi_code; /* Signal code */ 432 uint32_t ssi_pid; /* PID of sender */ 433 uint32_t ssi_uid; /* Real UID of sender */ 434 int32_t ssi_fd; /* File descriptor (SIGIO) */ 435 uint32_t ssi_tid; /* Kernel timer ID (POSIX timers) */ 436 uint32_t ssi_band; /* Band event (SIGIO) */ 437 uint32_t ssi_overrun; /* POSIX timer overrun count */ 438 uint32_t ssi_trapno; /* Trap number that caused signal */ 439 int32_t ssi_status; /* Exit status or signal (SIGCHLD) */ 440 int32_t ssi_int; /* Integer sent by sigqueue(2) */ 441 uint64_t ssi_ptr; /* Pointer sent by sigqueue(2) */ 442 uint64_t ssi_utime; /* User CPU time consumed (SIGCHLD) */ 443 uint64_t ssi_stime; /* System CPU time consumed (SIGCHLD) */ 444 uint64_t ssi_addr; /* Address that generated signal 445 (for hardware-generated signals) */ 446 uint8_t pad[48]; /* Pad size to 128 bytes (allow for 447 additional fields in the future) */ 448 }; 449 450 int qemu_signalfd(const sigset_t *mask); 451 void sigaction_invoke(struct sigaction *action, 452 struct qemu_signalfd_siginfo *info); 453 #endif 454 455 /* 456 * Don't introduce new usage of this function, prefer the following 457 * qemu_open/qemu_create that take an "Error **errp" 458 */ 459 int qemu_open_old(const char *name, int flags, ...); 460 int qemu_open(const char *name, int flags, Error **errp); 461 int qemu_create(const char *name, int flags, mode_t mode, Error **errp); 462 int qemu_close(int fd); 463 int qemu_unlink(const char *name); 464 #ifndef _WIN32 465 int qemu_dup_flags(int fd, int flags); 466 int qemu_dup(int fd); 467 int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive); 468 int qemu_unlock_fd(int fd, int64_t start, int64_t len); 469 int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive); 470 bool qemu_has_ofd_lock(void); 471 #endif 472 473 #if defined(__HAIKU__) && defined(__i386__) 474 #define FMT_pid "%ld" 475 #elif defined(WIN64) 476 #define FMT_pid "%" PRId64 477 #else 478 #define FMT_pid "%d" 479 #endif 480 481 bool qemu_write_pidfile(const char *pidfile, Error **errp); 482 483 int qemu_get_thread_id(void); 484 485 #ifndef CONFIG_IOVEC 486 struct iovec { 487 void *iov_base; 488 size_t iov_len; 489 }; 490 /* 491 * Use the same value as Linux for now. 492 */ 493 #define IOV_MAX 1024 494 495 ssize_t readv(int fd, const struct iovec *iov, int iov_cnt); 496 ssize_t writev(int fd, const struct iovec *iov, int iov_cnt); 497 #endif 498 499 #ifdef _WIN32 500 static inline void qemu_timersub(const struct timeval *val1, 501 const struct timeval *val2, 502 struct timeval *res) 503 { 504 res->tv_sec = val1->tv_sec - val2->tv_sec; 505 if (val1->tv_usec < val2->tv_usec) { 506 res->tv_sec--; 507 res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000; 508 } else { 509 res->tv_usec = val1->tv_usec - val2->tv_usec; 510 } 511 } 512 #else 513 #define qemu_timersub timersub 514 #endif 515 516 void qemu_set_cloexec(int fd); 517 518 void fips_set_state(bool requested); 519 bool fips_get_state(void); 520 521 /* Return a dynamically allocated pathname denoting a file or directory that is 522 * appropriate for storing local state. 523 * 524 * @relative_pathname need not start with a directory separator; one will be 525 * added automatically. 526 * 527 * The caller is responsible for releasing the value returned with g_free() 528 * after use. 529 */ 530 char *qemu_get_local_state_pathname(const char *relative_pathname); 531 532 /* Find program directory, and save it for later usage with 533 * qemu_get_exec_dir(). 534 * Try OS specific API first, if not working, parse from argv0. */ 535 void qemu_init_exec_dir(const char *argv0); 536 537 /* Get the saved exec dir. */ 538 const char *qemu_get_exec_dir(void); 539 540 /** 541 * qemu_getauxval: 542 * @type: the auxiliary vector key to lookup 543 * 544 * Search the auxiliary vector for @type, returning the value 545 * or 0 if @type is not present. 546 */ 547 unsigned long qemu_getauxval(unsigned long type); 548 549 void qemu_set_tty_echo(int fd, bool echo); 550 551 void os_mem_prealloc(int fd, char *area, size_t sz, int smp_cpus, 552 Error **errp); 553 554 /** 555 * qemu_get_pid_name: 556 * @pid: pid of a process 557 * 558 * For given @pid fetch its name. Caller is responsible for 559 * freeing the string when no longer needed. 560 * Returns allocated string on success, NULL on failure. 561 */ 562 char *qemu_get_pid_name(pid_t pid); 563 564 /** 565 * qemu_fork: 566 * 567 * A version of fork that avoids signal handler race 568 * conditions that can lead to child process getting 569 * signals that are otherwise only expected by the 570 * parent. It also resets all signal handlers to the 571 * default settings. 572 * 573 * Returns 0 to child process, pid number to parent 574 * or -1 on failure. 575 */ 576 pid_t qemu_fork(Error **errp); 577 578 /* Using intptr_t ensures that qemu_*_page_mask is sign-extended even 579 * when intptr_t is 32-bit and we are aligning a long long. 580 */ 581 extern uintptr_t qemu_real_host_page_size; 582 extern intptr_t qemu_real_host_page_mask; 583 584 /* 585 * After using getopt or getopt_long, if you need to parse another set 586 * of options, then you must reset optind. Unfortunately the way to 587 * do this varies between implementations of getopt. 588 */ 589 static inline void qemu_reset_optind(void) 590 { 591 #ifdef HAVE_OPTRESET 592 optind = 1; 593 optreset = 1; 594 #else 595 optind = 0; 596 #endif 597 } 598 599 /** 600 * qemu_get_host_name: 601 * @errp: Error object 602 * 603 * Operating system agnostic way of querying host name. 604 * 605 * Returns allocated hostname (caller should free), NULL on failure. 606 */ 607 char *qemu_get_host_name(Error **errp); 608 609 /** 610 * qemu_get_host_physmem: 611 * 612 * Operating system agnostic way of querying host memory. 613 * 614 * Returns amount of physical memory on the system. This is purely 615 * advisery and may return 0 if we can't work it out. At the other 616 * end we saturate to SIZE_MAX if you are lucky enough to have that 617 * much memory. 618 */ 619 size_t qemu_get_host_physmem(void); 620 621 /* 622 * Toggle write/execute on the pages marked MAP_JIT 623 * for the current thread. 624 */ 625 #if defined(MAC_OS_VERSION_11_0) && \ 626 MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_VERSION_11_0 627 static inline void qemu_thread_jit_execute(void) 628 { 629 pthread_jit_write_protect_np(true); 630 } 631 632 static inline void qemu_thread_jit_write(void) 633 { 634 pthread_jit_write_protect_np(false); 635 } 636 #else 637 static inline void qemu_thread_jit_write(void) {} 638 static inline void qemu_thread_jit_execute(void) {} 639 #endif 640 641 /** 642 * Platforms which do not support system() return ENOSYS 643 */ 644 #ifndef HAVE_SYSTEM_FUNCTION 645 #define system platform_does_not_support_system 646 static inline int platform_does_not_support_system(const char *command) 647 { 648 errno = ENOSYS; 649 return -1; 650 } 651 #endif /* !HAVE_SYSTEM_FUNCTION */ 652 653 #ifdef __cplusplus 654 } 655 #endif 656 657 #endif 658