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Comparing libev/ev.c (file contents):
Revision 1.505 by root, Wed Jul 10 14:25:35 2019 UTC vs.
Revision 1.537 by sf-exg, Sun May 14 19:02:31 2023 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007-2019 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2020 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#pragma clang diagnostic ignored "-Wunused-value"
41#pragma clang diagnostic ignored "-Wcomment"
42#pragma clang diagnostic ignored "-Wextern-initializer"
43
40/* this big block deduces configuration from config.h */ 44/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
43# include EV_CONFIG_H 47# include EV_CONFIG_H
44# else 48# else
… …
117# define EV_USE_EPOLL 0 121# define EV_USE_EPOLL 0
118# endif 122# endif
119 123
120# if HAVE_LINUX_AIO_ABI_H 124# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO 125# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS 126# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
123# endif 127# endif
124# else 128# else
125# undef EV_USE_LINUXAIO 129# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0 130# define EV_USE_LINUXAIO 0
127# endif 131# endif
128 132
133# if HAVE_LINUX_FS_H && HAVE_SYS_TIMERFD_H && HAVE_KERNEL_RWF_T
134# ifndef EV_USE_IOURING
135# define EV_USE_IOURING EV_FEATURE_BACKENDS
136# endif
137# else
138# undef EV_USE_IOURING
139# define EV_USE_IOURING 0
140# endif
141
129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 142# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
130# ifndef EV_USE_KQUEUE 143# ifndef EV_USE_KQUEUE
131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 144# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
132# endif 145# endif
133# else 146# else
… …
168# endif 181# endif
169# else 182# else
170# undef EV_USE_EVENTFD 183# undef EV_USE_EVENTFD
171# define EV_USE_EVENTFD 0 184# define EV_USE_EVENTFD 0
172# endif 185# endif
173 186
187# if HAVE_SYS_TIMERFD_H
188# ifndef EV_USE_TIMERFD
189# define EV_USE_TIMERFD EV_FEATURE_OS
190# endif
191# else
192# undef EV_USE_TIMERFD
193# define EV_USE_TIMERFD 0
194# endif
195
174#endif 196#endif
175 197
176/* OS X, in its infinite idiocy, actually HARDCODES 198/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains, 199 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were 200 * OS X engineers apparently have a vacuum. Or maybe they were
… …
326# define EV_USE_PORT 0 348# define EV_USE_PORT 0
327#endif 349#endif
328 350
329#ifndef EV_USE_LINUXAIO 351#ifndef EV_USE_LINUXAIO
330# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */ 352# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
331# define EV_USE_LINUXAIO 1 353# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
332# else 354# else
333# define EV_USE_LINUXAIO 0 355# define EV_USE_LINUXAIO 0
334# endif 356# endif
335#endif 357#endif
336 358
337#ifndef EV_USE_IOURING 359#ifndef EV_USE_IOURING
338# if __linux 360# if __linux /* later checks might disable again */
339# define EV_USE_IOURING 0 361# define EV_USE_IOURING 1
340# else 362# else
341# define EV_USE_IOURING 0 363# define EV_USE_IOURING 0
342# endif 364# endif
343#endif 365#endif
344 366
… …
369#ifndef EV_USE_SIGNALFD 391#ifndef EV_USE_SIGNALFD
370# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 392# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
371# define EV_USE_SIGNALFD EV_FEATURE_OS 393# define EV_USE_SIGNALFD EV_FEATURE_OS
372# else 394# else
373# define EV_USE_SIGNALFD 0 395# define EV_USE_SIGNALFD 0
396# endif
397#endif
398
399#ifndef EV_USE_TIMERFD
400# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8))
401# define EV_USE_TIMERFD EV_FEATURE_OS
402# else
403# define EV_USE_TIMERFD 0
374# endif 404# endif
375#endif 405#endif
376 406
377#if 0 /* debugging */ 407#if 0 /* debugging */
378# define EV_VERIFY 3 408# define EV_VERIFY 3
… …
438#if !EV_STAT_ENABLE 468#if !EV_STAT_ENABLE
439# undef EV_USE_INOTIFY 469# undef EV_USE_INOTIFY
440# define EV_USE_INOTIFY 0 470# define EV_USE_INOTIFY 0
441#endif 471#endif
442 472
473#if __linux && EV_USE_IOURING
474# include <linux/version.h>
475# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
476# undef EV_USE_IOURING
477# define EV_USE_IOURING 0
478# endif
479#endif
480
443#if !EV_USE_NANOSLEEP 481#if !EV_USE_NANOSLEEP
444/* hp-ux has it in sys/time.h, which we unconditionally include above */ 482/* hp-ux has it in sys/time.h, which we unconditionally include above */
445# if !defined _WIN32 && !defined __hpux 483# if !defined _WIN32 && !defined __hpux
446# include <sys/select.h> 484# include <sys/select.h>
447# endif 485# endif
… …
457# endif 495# endif
458#endif 496#endif
459 497
460#if EV_USE_IOURING 498#if EV_USE_IOURING
461# include <sys/syscall.h> 499# include <sys/syscall.h>
462# if !SYS_io_uring_setup && __linux && !__alpha 500# if !SYS_io_uring_register && __linux && !__alpha
463# define SYS_io_uring_setup 425 501# define SYS_io_uring_setup 425
464# define SYS_io_uring_enter 426 502# define SYS_io_uring_enter 426
465# define SYS_io_uring_wregister 427 503# define SYS_io_uring_register 427
466# endif 504# endif
467# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */ 505# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
468# define EV_NEED_SYSCALL 1 506# define EV_NEED_SYSCALL 1
469# else 507# else
470# undef EV_USE_IOURING 508# undef EV_USE_IOURING
… …
481# define EV_USE_INOTIFY 0 519# define EV_USE_INOTIFY 0
482# endif 520# endif
483#endif 521#endif
484 522
485#if EV_USE_EVENTFD 523#if EV_USE_EVENTFD
486/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 524/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
487# include <stdint.h> 525# include <stdint.h>
488# ifndef EFD_NONBLOCK 526# ifndef EFD_NONBLOCK
489# define EFD_NONBLOCK O_NONBLOCK 527# define EFD_NONBLOCK O_NONBLOCK
490# endif 528# endif
491# ifndef EFD_CLOEXEC 529# ifndef EFD_CLOEXEC
… …
497# endif 535# endif
498EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); 536EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
499#endif 537#endif
500 538
501#if EV_USE_SIGNALFD 539#if EV_USE_SIGNALFD
502/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 540/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
503# include <stdint.h> 541# include <stdint.h>
504# ifndef SFD_NONBLOCK 542# ifndef SFD_NONBLOCK
505# define SFD_NONBLOCK O_NONBLOCK 543# define SFD_NONBLOCK O_NONBLOCK
506# endif 544# endif
507# ifndef SFD_CLOEXEC 545# ifndef SFD_CLOEXEC
… …
509# define SFD_CLOEXEC O_CLOEXEC 547# define SFD_CLOEXEC O_CLOEXEC
510# else 548# else
511# define SFD_CLOEXEC 02000000 549# define SFD_CLOEXEC 02000000
512# endif 550# endif
513# endif 551# endif
514EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags); 552EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
515 553
516struct signalfd_siginfo 554struct signalfd_siginfo
517{ 555{
518 uint32_t ssi_signo; 556 uint32_t ssi_signo;
519 char pad[128 - sizeof (uint32_t)]; 557 char pad[128 - sizeof (uint32_t)];
520}; 558};
559#endif
560
561/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */
562#if EV_USE_TIMERFD
563# include <sys/timerfd.h>
564/* timerfd is only used for periodics */
565# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE
566# undef EV_USE_TIMERFD
567# define EV_USE_TIMERFD 0
568# endif
521#endif 569#endif
522 570
523/*****************************************************************************/ 571/*****************************************************************************/
524 572
525#if EV_VERIFY >= 3 573#if EV_VERIFY >= 3
… …
535#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ 583#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
536/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 584/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
537 585
538#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 586#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
539#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 587#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
588#define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */
540 589
541/* find a portable timestamp that is "always" in the future but fits into time_t. 590/* find a portable timestamp that is "always" in the future but fits into time_t.
542 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t, 591 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
543 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */ 592 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
544#define EV_TSTAMP_HUGE \ 593#define EV_TSTAMP_HUGE \
545 (sizeof (time_t) >= 8 ? 10000000000000. \ 594 (sizeof (time_t) >= 8 ? 10000000000000. \
546 : 0 < (time_t)4294967295 ? 4294967295. \ 595 : 0 < (time_t)4294967295 ? 4294967295. \
547 : 2147483647.) \ 596 : 2147483647.) \
548 597
598#ifndef EV_TS_CONST
599# define EV_TS_CONST(nv) nv
600# define EV_TS_TO_MSEC(a) a * 1e3 + 0.9999
601# define EV_TS_FROM_USEC(us) us * 1e-6
549#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 602# define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
550#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 603# define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
551#define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e6) 604# define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e-6)
552#define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e9) 605# define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e-9)
606#endif
553 607
554/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ 608/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
555/* ECB.H BEGIN */ 609/* ECB.H BEGIN */
556/* 610/*
557 * libecb - http://software.schmorp.de/pkg/libecb 611 * libecb - http://software.schmorp.de/pkg/libecb
558 * 612 *
559 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de> 613 * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de>
560 * Copyright (©) 2011 Emanuele Giaquinta 614 * Copyright (©) 2011 Emanuele Giaquinta
561 * All rights reserved. 615 * All rights reserved.
562 * 616 *
563 * Redistribution and use in source and binary forms, with or without modifica- 617 * Redistribution and use in source and binary forms, with or without modifica-
564 * tion, are permitted provided that the following conditions are met: 618 * tion, are permitted provided that the following conditions are met:
… …
595 649
596#ifndef ECB_H 650#ifndef ECB_H
597#define ECB_H 651#define ECB_H
598 652
599/* 16 bits major, 16 bits minor */ 653/* 16 bits major, 16 bits minor */
600#define ECB_VERSION 0x00010006 654#define ECB_VERSION 0x00010008
601 655
602#ifdef _WIN32 656#include <string.h> /* for memcpy */
657
658#if defined (_WIN32) && !defined (__MINGW32__)
603 typedef signed char int8_t; 659 typedef signed char int8_t;
604 typedef unsigned char uint8_t; 660 typedef unsigned char uint8_t;
661 typedef signed char int_fast8_t;
662 typedef unsigned char uint_fast8_t;
605 typedef signed short int16_t; 663 typedef signed short int16_t;
606 typedef unsigned short uint16_t; 664 typedef unsigned short uint16_t;
665 typedef signed int int_fast16_t;
666 typedef unsigned int uint_fast16_t;
607 typedef signed int int32_t; 667 typedef signed int int32_t;
608 typedef unsigned int uint32_t; 668 typedef unsigned int uint32_t;
669 typedef signed int int_fast32_t;
670 typedef unsigned int uint_fast32_t;
609 #if __GNUC__ 671 #if __GNUC__
610 typedef signed long long int64_t; 672 typedef signed long long int64_t;
611 typedef unsigned long long uint64_t; 673 typedef unsigned long long uint64_t;
612 #else /* _MSC_VER || __BORLANDC__ */ 674 #else /* _MSC_VER || __BORLANDC__ */
613 typedef signed __int64 int64_t; 675 typedef signed __int64 int64_t;
614 typedef unsigned __int64 uint64_t; 676 typedef unsigned __int64 uint64_t;
615 #endif 677 #endif
678 typedef int64_t int_fast64_t;
679 typedef uint64_t uint_fast64_t;
616 #ifdef _WIN64 680 #ifdef _WIN64
617 #define ECB_PTRSIZE 8 681 #define ECB_PTRSIZE 8
618 typedef uint64_t uintptr_t; 682 typedef uint64_t uintptr_t;
619 typedef int64_t intptr_t; 683 typedef int64_t intptr_t;
620 #else 684 #else
… …
631 #endif 695 #endif
632#endif 696#endif
633 697
634#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) 698#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
635#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) 699#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
700
701#ifndef ECB_OPTIMIZE_SIZE
702 #if __OPTIMIZE_SIZE__
703 #define ECB_OPTIMIZE_SIZE 1
704 #else
705 #define ECB_OPTIMIZE_SIZE 0
706 #endif
707#endif
636 708
637/* work around x32 idiocy by defining proper macros */ 709/* work around x32 idiocy by defining proper macros */
638#if ECB_GCC_AMD64 || ECB_MSVC_AMD64 710#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
639 #if _ILP32 711 #if _ILP32
640 #define ECB_AMD64_X32 1 712 #define ECB_AMD64_X32 1
… …
1147ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } 1219ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1148ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } 1220ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1149ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } 1221ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1150ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } 1222ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1151 1223
1224#if ECB_CPP
1225
1226inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
1227inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
1228inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
1229inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
1230
1231inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
1232inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
1233inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
1234inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
1235
1236inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
1237inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
1238inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
1239inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
1240
1241inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
1242inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
1243inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
1244inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
1245
1246inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
1247inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
1248inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
1249
1250inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
1251inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
1252inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
1253inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
1254
1255inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
1256inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
1257inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
1258inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
1259
1260#endif
1261
1152#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) 1262#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1153 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) 1263 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1154 #define ecb_bswap16(x) __builtin_bswap16 (x) 1264 #define ecb_bswap16(x) __builtin_bswap16 (x)
1155 #else 1265 #else
1156 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1266 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
… …
1227ecb_inline ecb_const ecb_bool ecb_big_endian (void); 1337ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1228ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } 1338ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1229ecb_inline ecb_const ecb_bool ecb_little_endian (void); 1339ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1230ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } 1340ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1231 1341
1342/*****************************************************************************/
1343/* unaligned load/store */
1344
1345ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1346ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1347ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1348
1349ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1350ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1351ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1352
1353ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1354ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1355ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1356
1357ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
1358ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
1359ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
1360
1361ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
1362ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
1363ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
1364
1365ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1366ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1367ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1368
1369ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1370ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1371ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1372
1373ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
1374ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
1375ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
1376
1377ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
1378ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
1379ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
1380
1381ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
1382ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
1383ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
1384
1385#if ECB_CPP
1386
1387inline uint8_t ecb_bswap (uint8_t v) { return v; }
1388inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
1389inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
1390inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
1391
1392template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1393template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1394template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
1395template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
1396template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
1397template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
1398template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
1399template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
1400
1401template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1402template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1403template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
1404template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
1405template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
1406template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
1407template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
1408template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
1409
1410#endif
1411
1412/*****************************************************************************/
1413
1232#if ECB_GCC_VERSION(3,0) || ECB_C99 1414#if ECB_GCC_VERSION(3,0) || ECB_C99
1233 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 1415 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1234#else 1416#else
1235 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 1417 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1236#endif 1418#endif
… …
1259 return N; 1441 return N;
1260 } 1442 }
1261#else 1443#else
1262 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1444 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1263#endif 1445#endif
1446
1447/*****************************************************************************/
1264 1448
1265ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); 1449ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1266ecb_function_ ecb_const uint32_t 1450ecb_function_ ecb_const uint32_t
1267ecb_binary16_to_binary32 (uint32_t x) 1451ecb_binary16_to_binary32 (uint32_t x)
1268{ 1452{
… …
1377 || defined __sh__ \ 1561 || defined __sh__ \
1378 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ 1562 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1379 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ 1563 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1380 || defined __aarch64__ 1564 || defined __aarch64__
1381 #define ECB_STDFP 1 1565 #define ECB_STDFP 1
1382 #include <string.h> /* for memcpy */
1383#else 1566#else
1384 #define ECB_STDFP 0 1567 #define ECB_STDFP 0
1385#endif 1568#endif
1386 1569
1387#ifndef ECB_NO_LIBM 1570#ifndef ECB_NO_LIBM
… …
1609 * our syscalls return < 0, not == -1, on error. which is good 1792 * our syscalls return < 0, not == -1, on error. which is good
1610 * enough for linux aio. 1793 * enough for linux aio.
1611 * TODO: arm is also common nowadays, maybe even mips and x86 1794 * TODO: arm is also common nowadays, maybe even mips and x86
1612 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove... 1795 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1613 */ 1796 */
1614#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__ 1797#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1615 /* the costly errno access probably kills this for size optimisation */ 1798 /* the costly errno access probably kills this for size optimisation */
1616 1799
1617 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \ 1800 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1618 ({ \ 1801 ({ \
1619 long res; \ 1802 long res; \
… …
1963 static struct ev_loop default_loop_struct; 2146 static struct ev_loop default_loop_struct;
1964 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */ 2147 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1965 2148
1966#else 2149#else
1967 2150
1968 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */ 2151 EV_API_DECL ev_tstamp ev_rt_now = EV_TS_CONST (0.); /* needs to be initialised to make it a definition despite extern */
1969 #define VAR(name,decl) static decl; 2152 #define VAR(name,decl) static decl;
1970 #include "ev_vars.h" 2153 #include "ev_vars.h"
1971 #undef VAR 2154 #undef VAR
1972 2155
1973 static int ev_default_loop_ptr; 2156 static int ev_default_loop_ptr;
… …
1999 clock_gettime (CLOCK_REALTIME, &ts); 2182 clock_gettime (CLOCK_REALTIME, &ts);
2000 return EV_TS_GET (ts); 2183 return EV_TS_GET (ts);
2001 } 2184 }
2002#endif 2185#endif
2003 2186
2187 {
2004 struct timeval tv; 2188 struct timeval tv;
2005 gettimeofday (&tv, 0); 2189 gettimeofday (&tv, 0);
2006 return EV_TV_GET (tv); 2190 return EV_TV_GET (tv);
2191 }
2007} 2192}
2008#endif 2193#endif
2009 2194
2010inline_size ev_tstamp 2195inline_size ev_tstamp
2011get_clock (void) 2196get_clock (void)
… …
2031#endif 2216#endif
2032 2217
2033void 2218void
2034ev_sleep (ev_tstamp delay) EV_NOEXCEPT 2219ev_sleep (ev_tstamp delay) EV_NOEXCEPT
2035{ 2220{
2036 if (delay > 0.) 2221 if (delay > EV_TS_CONST (0.))
2037 { 2222 {
2038#if EV_USE_NANOSLEEP 2223#if EV_USE_NANOSLEEP
2039 struct timespec ts; 2224 struct timespec ts;
2040 2225
2041 EV_TS_SET (ts, delay); 2226 EV_TS_SET (ts, delay);
2042 nanosleep (&ts, 0); 2227 nanosleep (&ts, 0);
2043#elif defined _WIN32 2228#elif defined _WIN32
2044 /* maybe this should round up, as ms is very low resolution */ 2229 /* maybe this should round up, as ms is very low resolution */
2045 /* compared to select (µs) or nanosleep (ns) */ 2230 /* compared to select (µs) or nanosleep (ns) */
2046 Sleep ((unsigned long)(delay * 1e3)); 2231 Sleep ((unsigned long)(EV_TS_TO_MSEC (delay)));
2047#else 2232#else
2048 struct timeval tv; 2233 struct timeval tv;
2049 2234
2050 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 2235 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
2051 /* something not guaranteed by newer posix versions, but guaranteed */ 2236 /* something not guaranteed by newer posix versions, but guaranteed */
… …
2211inline_size void 2396inline_size void
2212fd_reify (EV_P) 2397fd_reify (EV_P)
2213{ 2398{
2214 int i; 2399 int i;
2215 2400
2401 /* most backends do not modify the fdchanges list in backend_modify.
2402 * except io_uring, which has fixed-size buffers which might force us
2403 * to handle events in backend_modify, causing fdchanges to be amended,
2404 * which could result in an endless loop.
2405 * to avoid this, we do not dynamically handle fds that were added
2406 * during fd_reify. that means that for those backends, fdchangecnt
2407 * might be non-zero during poll, which must cause them to not block.
2408 * to not put too much of a burden on other backends, this detail
2409 * needs to be handled in the backend.
2410 */
2411 int changecnt = fdchangecnt;
2412
2216#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2413#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2217 for (i = 0; i < fdchangecnt; ++i) 2414 for (i = 0; i < changecnt; ++i)
2218 { 2415 {
2219 int fd = fdchanges [i]; 2416 int fd = fdchanges [i];
2220 ANFD *anfd = anfds + fd; 2417 ANFD *anfd = anfds + fd;
2221 2418
2222 if (anfd->reify & EV__IOFDSET && anfd->head) 2419 if (anfd->reify & EV__IOFDSET && anfd->head)
… …
2236 } 2433 }
2237 } 2434 }
2238 } 2435 }
2239#endif 2436#endif
2240 2437
2241 for (i = 0; i < fdchangecnt; ++i) 2438 for (i = 0; i < changecnt; ++i)
2242 { 2439 {
2243 int fd = fdchanges [i]; 2440 int fd = fdchanges [i];
2244 ANFD *anfd = anfds + fd; 2441 ANFD *anfd = anfds + fd;
2245 ev_io *w; 2442 ev_io *w;
2246 2443
… …
2262 2459
2263 if (o_reify & EV__IOFDSET) 2460 if (o_reify & EV__IOFDSET)
2264 backend_modify (EV_A_ fd, o_events, anfd->events); 2461 backend_modify (EV_A_ fd, o_events, anfd->events);
2265 } 2462 }
2266 2463
2464 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2465 * this is a rare case (see beginning comment in this function), so we copy them to the
2466 * front and hope the backend handles this case.
2467 */
2468 if (ecb_expect_false (fdchangecnt != changecnt))
2469 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2470
2267 fdchangecnt = 0; 2471 fdchangecnt -= changecnt;
2268} 2472}
2269 2473
2270/* something about the given fd changed */ 2474/* something about the given fd changed */
2271inline_size 2475inline_size
2272void 2476void
2273fd_change (EV_P_ int fd, int flags) 2477fd_change (EV_P_ int fd, int flags)
2274{ 2478{
2275 unsigned char reify = anfds [fd].reify; 2479 unsigned char reify = anfds [fd].reify;
2276 anfds [fd].reify |= flags; 2480 anfds [fd].reify = reify | flags;
2277 2481
2278 if (ecb_expect_true (!reify)) 2482 if (ecb_expect_true (!reify))
2279 { 2483 {
2280 ++fdchangecnt; 2484 ++fdchangecnt;
2281 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit); 2485 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
… …
2401 2605
2402 /* find minimum child */ 2606 /* find minimum child */
2403 if (ecb_expect_true (pos + DHEAP - 1 < E)) 2607 if (ecb_expect_true (pos + DHEAP - 1 < E))
2404 { 2608 {
2405 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2609 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2406 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2610 if ( minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2407 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2611 if ( minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2408 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2612 if ( minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2409 } 2613 }
2410 else if (pos < E) 2614 else if (pos < E)
2411 { 2615 {
2412 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 2616 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2413 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 2617 if (pos + 1 < E && minat > ANHE_at (pos [1])) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2414 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 2618 if (pos + 2 < E && minat > ANHE_at (pos [2])) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2415 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 2619 if (pos + 3 < E && minat > ANHE_at (pos [3])) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2416 } 2620 }
2417 else 2621 else
2418 break; 2622 break;
2419 2623
2420 if (ANHE_at (he) <= minat) 2624 if (ANHE_at (he) <= minat)
… …
2428 2632
2429 heap [k] = he; 2633 heap [k] = he;
2430 ev_active (ANHE_w (he)) = k; 2634 ev_active (ANHE_w (he)) = k;
2431} 2635}
2432 2636
2433#else /* 4HEAP */ 2637#else /* not 4HEAP */
2434 2638
2435#define HEAP0 1 2639#define HEAP0 1
2436#define HPARENT(k) ((k) >> 1) 2640#define HPARENT(k) ((k) >> 1)
2437#define UPHEAP_DONE(p,k) (!(p)) 2641#define UPHEAP_DONE(p,k) (!(p))
2438 2642
… …
2510 upheap (heap, i + HEAP0); 2714 upheap (heap, i + HEAP0);
2511} 2715}
2512 2716
2513/*****************************************************************************/ 2717/*****************************************************************************/
2514 2718
2515/* associate signal watchers to a signal signal */ 2719/* associate signal watchers to a signal */
2516typedef struct 2720typedef struct
2517{ 2721{
2518 EV_ATOMIC_T pending; 2722 EV_ATOMIC_T pending;
2519#if EV_MULTIPLICITY 2723#if EV_MULTIPLICITY
2520 EV_P; 2724 EV_P;
… …
2824 3028
2825#endif 3029#endif
2826 3030
2827/*****************************************************************************/ 3031/*****************************************************************************/
2828 3032
3033#if EV_USE_TIMERFD
3034
3035static void periodics_reschedule (EV_P);
3036
3037static void
3038timerfdcb (EV_P_ ev_io *iow, int revents)
3039{
3040 struct itimerspec its = { 0 };
3041
3042 its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2;
3043 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
3044
3045 ev_rt_now = ev_time ();
3046 /* periodics_reschedule only needs ev_rt_now */
3047 /* but maybe in the future we want the full treatment. */
3048 /*
3049 now_floor = EV_TS_CONST (0.);
3050 time_update (EV_A_ EV_TSTAMP_HUGE);
3051 */
3052#if EV_PERIODIC_ENABLE
3053 periodics_reschedule (EV_A);
3054#endif
3055}
3056
3057ecb_noinline ecb_cold
3058static void
3059evtimerfd_init (EV_P)
3060{
3061 if (!ev_is_active (&timerfd_w))
3062 {
3063 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
3064
3065 if (timerfd >= 0)
3066 {
3067 fd_intern (timerfd); /* just to be sure */
3068
3069 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
3070 ev_set_priority (&timerfd_w, EV_MINPRI);
3071 ev_io_start (EV_A_ &timerfd_w);
3072 ev_unref (EV_A); /* watcher should not keep loop alive */
3073
3074 /* (re-) arm timer */
3075 timerfdcb (EV_A_ 0, 0);
3076 }
3077 }
3078}
3079
3080#endif
3081
3082/*****************************************************************************/
3083
2829#if EV_USE_IOCP 3084#if EV_USE_IOCP
2830# include "ev_iocp.c" 3085# include "ev_iocp.c"
2831#endif 3086#endif
2832#if EV_USE_PORT 3087#if EV_USE_PORT
2833# include "ev_port.c" 3088# include "ev_port.c"
… …
2879unsigned int 3134unsigned int
2880ev_supported_backends (void) EV_NOEXCEPT 3135ev_supported_backends (void) EV_NOEXCEPT
2881{ 3136{
2882 unsigned int flags = 0; 3137 unsigned int flags = 0;
2883 3138
2884 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3139 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2885 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE; 3140 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
2886 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3141 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2887 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO; 3142 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
2888 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING; 3143 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
2889 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3144 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2890 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT; 3145 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
2891 3146
2892 return flags; 3147 return flags;
2893} 3148}
2894 3149
2895ecb_cold 3150ecb_cold
2896unsigned int 3151unsigned int
… …
2914 3169
2915 /* TODO: linuxaio is very experimental */ 3170 /* TODO: linuxaio is very experimental */
2916#if !EV_RECOMMEND_LINUXAIO 3171#if !EV_RECOMMEND_LINUXAIO
2917 flags &= ~EVBACKEND_LINUXAIO; 3172 flags &= ~EVBACKEND_LINUXAIO;
2918#endif 3173#endif
2919 /* TODO: linuxaio is super experimental */ 3174 /* TODO: iouring is super experimental */
2920#if !EV_RECOMMEND_IOURING 3175#if !EV_RECOMMEND_IOURING
2921 flags &= ~EVBACKEND_IOURING; 3176 flags &= ~EVBACKEND_IOURING;
2922#endif 3177#endif
2923 3178
2924 return flags; 3179 return flags;
… …
2926 3181
2927ecb_cold 3182ecb_cold
2928unsigned int 3183unsigned int
2929ev_embeddable_backends (void) EV_NOEXCEPT 3184ev_embeddable_backends (void) EV_NOEXCEPT
2930{ 3185{
2931 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3186 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
2932 3187
2933 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3188 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2934 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 3189 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2935 flags &= ~EVBACKEND_EPOLL; 3190 flags &= ~EVBACKEND_EPOLL;
2936 3191
2937 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */ 3192 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
2938
2939 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
2940 * because our backend_fd is the epoll fd we need as fallback.
2941 * if the kernel ever is fixed, this might change...
2942 */
2943 3193
2944 return flags; 3194 return flags;
2945} 3195}
2946 3196
2947unsigned int 3197unsigned int
… …
3065 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3315 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3066#endif 3316#endif
3067#if EV_USE_SIGNALFD 3317#if EV_USE_SIGNALFD
3068 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3318 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3069#endif 3319#endif
3320#if EV_USE_TIMERFD
3321 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3322#endif
3070 3323
3071 if (!(flags & EVBACKEND_MASK)) 3324 if (!(flags & EVBACKEND_MASK))
3072 flags |= ev_recommended_backends (); 3325 flags |= ev_recommended_backends ();
3073 3326
3074#if EV_USE_IOCP 3327#if EV_USE_IOCP
… …
3145 } 3398 }
3146 3399
3147#if EV_USE_SIGNALFD 3400#if EV_USE_SIGNALFD
3148 if (ev_is_active (&sigfd_w)) 3401 if (ev_is_active (&sigfd_w))
3149 close (sigfd); 3402 close (sigfd);
3403#endif
3404
3405#if EV_USE_TIMERFD
3406 if (ev_is_active (&timerfd_w))
3407 close (timerfd);
3150#endif 3408#endif
3151 3409
3152#if EV_USE_INOTIFY 3410#if EV_USE_INOTIFY
3153 if (fs_fd >= 0) 3411 if (fs_fd >= 0)
3154 close (fs_fd); 3412 close (fs_fd);
… …
3247#endif 3505#endif
3248#if EV_USE_INOTIFY 3506#if EV_USE_INOTIFY
3249 infy_fork (EV_A); 3507 infy_fork (EV_A);
3250#endif 3508#endif
3251 3509
3510 if (postfork != 2)
3511 {
3512 #if EV_USE_SIGNALFD
3513 /* surprisingly, nothing needs to be done for signalfd, according to docs, it does the right thing on fork */
3514 #endif
3515
3516 #if EV_USE_TIMERFD
3517 if (ev_is_active (&timerfd_w))
3518 {
3519 ev_ref (EV_A);
3520 ev_io_stop (EV_A_ &timerfd_w);
3521
3522 close (timerfd);
3523 timerfd = -2;
3524
3525 evtimerfd_init (EV_A);
3526 /* reschedule periodics, in case we missed something */
3527 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3528 }
3529 #endif
3530
3252#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3531 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3253 if (ev_is_active (&pipe_w) && postfork != 2) 3532 if (ev_is_active (&pipe_w))
3254 { 3533 {
3255 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 3534 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3256 3535
3257 ev_ref (EV_A); 3536 ev_ref (EV_A);
3258 ev_io_stop (EV_A_ &pipe_w); 3537 ev_io_stop (EV_A_ &pipe_w);
3259 3538
3260 if (evpipe [0] >= 0) 3539 if (evpipe [0] >= 0)
3261 EV_WIN32_CLOSE_FD (evpipe [0]); 3540 EV_WIN32_CLOSE_FD (evpipe [0]);
3262 3541
3263 evpipe_init (EV_A); 3542 evpipe_init (EV_A);
3264 /* iterate over everything, in case we missed something before */ 3543 /* iterate over everything, in case we missed something before */
3265 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3544 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3545 }
3546 #endif
3266 } 3547 }
3267#endif
3268 3548
3269 postfork = 0; 3549 postfork = 0;
3270} 3550}
3271 3551
3272#if EV_MULTIPLICITY 3552#if EV_MULTIPLICITY
… …
3542 { 3822 {
3543 ev_at (w) += w->repeat; 3823 ev_at (w) += w->repeat;
3544 if (ev_at (w) < mn_now) 3824 if (ev_at (w) < mn_now)
3545 ev_at (w) = mn_now; 3825 ev_at (w) = mn_now;
3546 3826
3547 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3827 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > EV_TS_CONST (0.)));
3548 3828
3549 ANHE_at_cache (timers [HEAP0]); 3829 ANHE_at_cache (timers [HEAP0]);
3550 downheap (timers, timercnt, HEAP0); 3830 downheap (timers, timercnt, HEAP0);
3551 } 3831 }
3552 else 3832 else
… …
3683 3963
3684 mn_now = get_clock (); 3964 mn_now = get_clock ();
3685 3965
3686 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3966 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3687 /* interpolate in the meantime */ 3967 /* interpolate in the meantime */
3688 if (ecb_expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3968 if (ecb_expect_true (mn_now - now_floor < EV_TS_CONST (MIN_TIMEJUMP * .5)))
3689 { 3969 {
3690 ev_rt_now = rtmn_diff + mn_now; 3970 ev_rt_now = rtmn_diff + mn_now;
3691 return; 3971 return;
3692 } 3972 }
3693 3973
… …
3707 ev_tstamp diff; 3987 ev_tstamp diff;
3708 rtmn_diff = ev_rt_now - mn_now; 3988 rtmn_diff = ev_rt_now - mn_now;
3709 3989
3710 diff = odiff - rtmn_diff; 3990 diff = odiff - rtmn_diff;
3711 3991
3712 if (ecb_expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) 3992 if (ecb_expect_true ((diff < EV_TS_CONST (0.) ? -diff : diff) < EV_TS_CONST (MIN_TIMEJUMP)))
3713 return; /* all is well */ 3993 return; /* all is well */
3714 3994
3715 ev_rt_now = ev_time (); 3995 ev_rt_now = ev_time ();
3716 mn_now = get_clock (); 3996 mn_now = get_clock ();
3717 now_floor = mn_now; 3997 now_floor = mn_now;
… …
3726 else 4006 else
3727#endif 4007#endif
3728 { 4008 {
3729 ev_rt_now = ev_time (); 4009 ev_rt_now = ev_time ();
3730 4010
3731 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 4011 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + EV_TS_CONST (MIN_TIMEJUMP)))
3732 { 4012 {
3733 /* adjust timers. this is easy, as the offset is the same for all of them */ 4013 /* adjust timers. this is easy, as the offset is the same for all of them */
3734 timers_reschedule (EV_A_ ev_rt_now - mn_now); 4014 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3735#if EV_PERIODIC_ENABLE 4015#if EV_PERIODIC_ENABLE
3736 periodics_reschedule (EV_A); 4016 periodics_reschedule (EV_A);
… …
3805 4085
3806 /* remember old timestamp for io_blocktime calculation */ 4086 /* remember old timestamp for io_blocktime calculation */
3807 ev_tstamp prev_mn_now = mn_now; 4087 ev_tstamp prev_mn_now = mn_now;
3808 4088
3809 /* update time to cancel out callback processing overhead */ 4089 /* update time to cancel out callback processing overhead */
3810 time_update (EV_A_ 1e100); 4090 time_update (EV_A_ EV_TS_CONST (EV_TSTAMP_HUGE));
3811 4091
3812 /* from now on, we want a pipe-wake-up */ 4092 /* from now on, we want a pipe-wake-up */
3813 pipe_write_wanted = 1; 4093 pipe_write_wanted = 1;
3814 4094
3815 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */ 4095 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3816 4096
3817 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) 4097 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3818 { 4098 {
3819 waittime = MAX_BLOCKTIME; 4099 waittime = EV_TS_CONST (MAX_BLOCKTIME);
4100
4101#if EV_USE_MONOTONIC
4102 if (ecb_expect_true (have_monotonic))
4103 {
4104#if EV_USE_TIMERFD
4105 /* sleep a lot longer when we can reliably detect timejumps */
4106 if (ecb_expect_true (timerfd != -1))
4107 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4108#endif
4109#if !EV_PERIODIC_ENABLE
4110 /* without periodics but with monotonic clock there is no need */
4111 /* for any time jump detection, so sleep longer */
4112 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4113#endif
4114 }
4115#endif
3820 4116
3821 if (timercnt) 4117 if (timercnt)
3822 { 4118 {
3823 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4119 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3824 if (waittime > to) waittime = to; 4120 if (waittime > to) waittime = to;
… …
3834 4130
3835 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4131 /* don't let timeouts decrease the waittime below timeout_blocktime */
3836 if (ecb_expect_false (waittime < timeout_blocktime)) 4132 if (ecb_expect_false (waittime < timeout_blocktime))
3837 waittime = timeout_blocktime; 4133 waittime = timeout_blocktime;
3838 4134
3839 /* at this point, we NEED to wait, so we have to ensure */ 4135 /* now there are two more special cases left, either we have
3840 /* to pass a minimum nonzero value to the backend */ 4136 * already-expired timers, so we should not sleep, or we have timers
4137 * that expire very soon, in which case we need to wait for a minimum
4138 * amount of time for some event loop backends.
4139 */
3841 if (ecb_expect_false (waittime < backend_mintime)) 4140 if (ecb_expect_false (waittime < backend_mintime))
4141 waittime = waittime <= EV_TS_CONST (0.)
4142 ? EV_TS_CONST (0.)
3842 waittime = backend_mintime; 4143 : backend_mintime;
3843 4144
3844 /* extra check because io_blocktime is commonly 0 */ 4145 /* extra check because io_blocktime is commonly 0 */
3845 if (ecb_expect_false (io_blocktime)) 4146 if (ecb_expect_false (io_blocktime))
3846 { 4147 {
3847 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4148 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3848 4149
3849 if (sleeptime > waittime - backend_mintime) 4150 if (sleeptime > waittime - backend_mintime)
3850 sleeptime = waittime - backend_mintime; 4151 sleeptime = waittime - backend_mintime;
3851 4152
3852 if (ecb_expect_true (sleeptime > 0.)) 4153 if (ecb_expect_true (sleeptime > EV_TS_CONST (0.)))
3853 { 4154 {
3854 ev_sleep (sleeptime); 4155 ev_sleep (sleeptime);
3855 waittime -= sleeptime; 4156 waittime -= sleeptime;
3856 } 4157 }
3857 } 4158 }
… …
3931} 4232}
3932 4233
3933void 4234void
3934ev_now_update (EV_P) EV_NOEXCEPT 4235ev_now_update (EV_P) EV_NOEXCEPT
3935{ 4236{
3936 time_update (EV_A_ 1e100); 4237 time_update (EV_A_ EV_TSTAMP_HUGE);
3937} 4238}
3938 4239
3939void 4240void
3940ev_suspend (EV_P) EV_NOEXCEPT 4241ev_suspend (EV_P) EV_NOEXCEPT
3941{ 4242{
… …
4172} 4473}
4173 4474
4174ev_tstamp 4475ev_tstamp
4175ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT 4476ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4176{ 4477{
4177 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4478 return ev_at (w) - (ev_is_active (w) ? mn_now : EV_TS_CONST (0.));
4178} 4479}
4179 4480
4180#if EV_PERIODIC_ENABLE 4481#if EV_PERIODIC_ENABLE
4181ecb_noinline 4482ecb_noinline
4182void 4483void
4183ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT 4484ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
4184{ 4485{
4185 if (ecb_expect_false (ev_is_active (w))) 4486 if (ecb_expect_false (ev_is_active (w)))
4186 return; 4487 return;
4488
4489#if EV_USE_TIMERFD
4490 if (timerfd == -2)
4491 evtimerfd_init (EV_A);
4492#endif
4187 4493
4188 if (w->reschedule_cb) 4494 if (w->reschedule_cb)
4189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4495 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
4190 else if (w->interval) 4496 else if (w->interval)
4191 { 4497 {
… …
4933 ev_run (EV_A_ EVRUN_NOWAIT); 5239 ev_run (EV_A_ EVRUN_NOWAIT);
4934 } 5240 }
4935 } 5241 }
4936} 5242}
4937 5243
5244#if EV_FORK_ENABLE
4938static void 5245static void
4939embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5246embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4940{ 5247{
4941 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5248 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4942 5249
… …
4949 ev_run (EV_A_ EVRUN_NOWAIT); 5256 ev_run (EV_A_ EVRUN_NOWAIT);
4950 } 5257 }
4951 5258
4952 ev_embed_start (EV_A_ w); 5259 ev_embed_start (EV_A_ w);
4953} 5260}
5261#endif
4954 5262
4955#if 0 5263#if 0
4956static void 5264static void
4957embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5265embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4958{ 5266{
… …
4979 5287
4980 ev_prepare_init (&w->prepare, embed_prepare_cb); 5288 ev_prepare_init (&w->prepare, embed_prepare_cb);
4981 ev_set_priority (&w->prepare, EV_MINPRI); 5289 ev_set_priority (&w->prepare, EV_MINPRI);
4982 ev_prepare_start (EV_A_ &w->prepare); 5290 ev_prepare_start (EV_A_ &w->prepare);
4983 5291
5292#if EV_FORK_ENABLE
4984 ev_fork_init (&w->fork, embed_fork_cb); 5293 ev_fork_init (&w->fork, embed_fork_cb);
4985 ev_fork_start (EV_A_ &w->fork); 5294 ev_fork_start (EV_A_ &w->fork);
5295#endif
4986 5296
4987 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5297 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4988 5298
4989 ev_start (EV_A_ (W)w, 1); 5299 ev_start (EV_A_ (W)w, 1);
4990 5300
… …
5000 5310
5001 EV_FREQUENT_CHECK; 5311 EV_FREQUENT_CHECK;
5002 5312
5003 ev_io_stop (EV_A_ &w->io); 5313 ev_io_stop (EV_A_ &w->io);
5004 ev_prepare_stop (EV_A_ &w->prepare); 5314 ev_prepare_stop (EV_A_ &w->prepare);
5315#if EV_FORK_ENABLE
5005 ev_fork_stop (EV_A_ &w->fork); 5316 ev_fork_stop (EV_A_ &w->fork);
5317#endif
5006 5318
5007 ev_stop (EV_A_ (W)w); 5319 ev_stop (EV_A_ (W)w);
5008 5320
5009 EV_FREQUENT_CHECK; 5321 EV_FREQUENT_CHECK;
5010} 5322}

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