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Comparing libev/ev.c (file contents):
Revision 1.511 by root, Fri Nov 22 14:32:13 2019 UTC vs.
Revision 1.536 by root, Wed Aug 10 16:50:05 2022 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
… …
178# else 182# else
179# undef EV_USE_EVENTFD 183# undef EV_USE_EVENTFD
180# define EV_USE_EVENTFD 0 184# define EV_USE_EVENTFD 0
181# endif 185# endif
182 186
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
183#endif 196#endif
184 197
185/* OS X, in its infinite idiocy, actually HARDCODES 198/* OS X, in its infinite idiocy, actually HARDCODES
186 * a limit of 1024 into their select. Where people have brains, 199 * a limit of 1024 into their select. Where people have brains,
187 * OS X engineers apparently have a vacuum. Or maybe they were 200 * OS X engineers apparently have a vacuum. Or maybe they were
… …
335# define EV_USE_PORT 0 348# define EV_USE_PORT 0
336#endif 349#endif
337 350
338#ifndef EV_USE_LINUXAIO 351#ifndef EV_USE_LINUXAIO
339# 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 */
340# define EV_USE_LINUXAIO 1 353# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
341# else 354# else
342# define EV_USE_LINUXAIO 0 355# define EV_USE_LINUXAIO 0
343# endif 356# endif
344#endif 357#endif
345 358
… …
378#ifndef EV_USE_SIGNALFD 391#ifndef EV_USE_SIGNALFD
379# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 392# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
380# define EV_USE_SIGNALFD EV_FEATURE_OS 393# define EV_USE_SIGNALFD EV_FEATURE_OS
381# else 394# else
382# 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
383# endif 404# endif
384#endif 405#endif
385 406
386#if 0 /* debugging */ 407#if 0 /* debugging */
387# define EV_VERIFY 3 408# define EV_VERIFY 3
… …
448# undef EV_USE_INOTIFY 469# undef EV_USE_INOTIFY
449# define EV_USE_INOTIFY 0 470# define EV_USE_INOTIFY 0
450#endif 471#endif
451 472
452#if __linux && EV_USE_IOURING 473#if __linux && EV_USE_IOURING
453# include <linux/fs.h> 474# include <linux/version.h>
454# ifndef RWF_SYNC 475# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
455# undef EV_USE_IOURING 476# undef EV_USE_IOURING
456# define EV_USE_IOURING 0 477# define EV_USE_IOURING 0
457# endif 478# endif
458#endif 479#endif
459 480
… …
474# endif 495# endif
475#endif 496#endif
476 497
477#if EV_USE_IOURING 498#if EV_USE_IOURING
478# include <sys/syscall.h> 499# include <sys/syscall.h>
479# if !SYS_io_uring_setup && __linux && !__alpha 500# if !SYS_io_uring_register && __linux && !__alpha
480# define SYS_io_uring_setup 425 501# define SYS_io_uring_setup 425
481# define SYS_io_uring_enter 426 502# define SYS_io_uring_enter 426
482# define SYS_io_uring_wregister 427 503# define SYS_io_uring_register 427
483# endif 504# endif
484# 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 */
485# define EV_NEED_SYSCALL 1 506# define EV_NEED_SYSCALL 1
486# else 507# else
487# undef EV_USE_IOURING 508# undef EV_USE_IOURING
… …
498# define EV_USE_INOTIFY 0 519# define EV_USE_INOTIFY 0
499# endif 520# endif
500#endif 521#endif
501 522
502#if EV_USE_EVENTFD 523#if EV_USE_EVENTFD
503/* 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 */
504# include <stdint.h> 525# include <stdint.h>
505# ifndef EFD_NONBLOCK 526# ifndef EFD_NONBLOCK
506# define EFD_NONBLOCK O_NONBLOCK 527# define EFD_NONBLOCK O_NONBLOCK
507# endif 528# endif
508# ifndef EFD_CLOEXEC 529# ifndef EFD_CLOEXEC
… …
514# endif 535# endif
515EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); 536EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
516#endif 537#endif
517 538
518#if EV_USE_SIGNALFD 539#if EV_USE_SIGNALFD
519/* 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 */
520# include <stdint.h> 541# include <stdint.h>
521# ifndef SFD_NONBLOCK 542# ifndef SFD_NONBLOCK
522# define SFD_NONBLOCK O_NONBLOCK 543# define SFD_NONBLOCK O_NONBLOCK
523# endif 544# endif
524# ifndef SFD_CLOEXEC 545# ifndef SFD_CLOEXEC
… …
526# define SFD_CLOEXEC O_CLOEXEC 547# define SFD_CLOEXEC O_CLOEXEC
527# else 548# else
528# define SFD_CLOEXEC 02000000 549# define SFD_CLOEXEC 02000000
529# endif 550# endif
530# endif 551# endif
531EV_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);
532 553
533struct signalfd_siginfo 554struct signalfd_siginfo
534{ 555{
535 uint32_t ssi_signo; 556 uint32_t ssi_signo;
536 char pad[128 - sizeof (uint32_t)]; 557 char pad[128 - sizeof (uint32_t)];
537}; 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
538#endif 569#endif
539 570
540/*****************************************************************************/ 571/*****************************************************************************/
541 572
542#if EV_VERIFY >= 3 573#if EV_VERIFY >= 3
… …
552#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ 583#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
553/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 584/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
554 585
555#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) */
556#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 */
557 589
558/* 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.
559 * 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,
560 * 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 */
561#define EV_TSTAMP_HUGE \ 593#define EV_TSTAMP_HUGE \
… …
576/* 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 */
577/* ECB.H BEGIN */ 609/* ECB.H BEGIN */
578/* 610/*
579 * libecb - http://software.schmorp.de/pkg/libecb 611 * libecb - http://software.schmorp.de/pkg/libecb
580 * 612 *
581 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de> 613 * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de>
582 * Copyright (©) 2011 Emanuele Giaquinta 614 * Copyright (©) 2011 Emanuele Giaquinta
583 * All rights reserved. 615 * All rights reserved.
584 * 616 *
585 * 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-
586 * tion, are permitted provided that the following conditions are met: 618 * tion, are permitted provided that the following conditions are met:
… …
617 649
618#ifndef ECB_H 650#ifndef ECB_H
619#define ECB_H 651#define ECB_H
620 652
621/* 16 bits major, 16 bits minor */ 653/* 16 bits major, 16 bits minor */
622#define ECB_VERSION 0x00010006 654#define ECB_VERSION 0x00010008
623 655
624#ifdef _WIN32 656#include <string.h> /* for memcpy */
657
658#if defined (_WIN32) && !defined (__MINGW32__)
625 typedef signed char int8_t; 659 typedef signed char int8_t;
626 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;
627 typedef signed short int16_t; 663 typedef signed short int16_t;
628 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;
629 typedef signed int int32_t; 667 typedef signed int int32_t;
630 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;
631 #if __GNUC__ 671 #if __GNUC__
632 typedef signed long long int64_t; 672 typedef signed long long int64_t;
633 typedef unsigned long long uint64_t; 673 typedef unsigned long long uint64_t;
634 #else /* _MSC_VER || __BORLANDC__ */ 674 #else /* _MSC_VER || __BORLANDC__ */
635 typedef signed __int64 int64_t; 675 typedef signed __int64 int64_t;
636 typedef unsigned __int64 uint64_t; 676 typedef unsigned __int64 uint64_t;
637 #endif 677 #endif
678 typedef int64_t int_fast64_t;
679 typedef uint64_t uint_fast64_t;
638 #ifdef _WIN64 680 #ifdef _WIN64
639 #define ECB_PTRSIZE 8 681 #define ECB_PTRSIZE 8
640 typedef uint64_t uintptr_t; 682 typedef uint64_t uintptr_t;
641 typedef int64_t intptr_t; 683 typedef int64_t intptr_t;
642 #else 684 #else
… …
653 #endif 695 #endif
654#endif 696#endif
655 697
656#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) 698#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
657#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
658 708
659/* work around x32 idiocy by defining proper macros */ 709/* work around x32 idiocy by defining proper macros */
660#if ECB_GCC_AMD64 || ECB_MSVC_AMD64 710#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
661 #if _ILP32 711 #if _ILP32
662 #define ECB_AMD64_X32 1 712 #define ECB_AMD64_X32 1
… …
1169ecb_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); }
1170ecb_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); }
1171ecb_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); }
1172ecb_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); }
1173 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
1174#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))
1175 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) 1263 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1176 #define ecb_bswap16(x) __builtin_bswap16 (x) 1264 #define ecb_bswap16(x) __builtin_bswap16 (x)
1177 #else 1265 #else
1178 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1266 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
… …
1249ecb_inline ecb_const ecb_bool ecb_big_endian (void); 1337ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1250ecb_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; }
1251ecb_inline ecb_const ecb_bool ecb_little_endian (void); 1339ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1252ecb_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; }
1253 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
1254#if ECB_GCC_VERSION(3,0) || ECB_C99 1414#if ECB_GCC_VERSION(3,0) || ECB_C99
1255 #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))
1256#else 1416#else
1257 #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)))
1258#endif 1418#endif
… …
1281 return N; 1441 return N;
1282 } 1442 }
1283#else 1443#else
1284 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1444 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1285#endif 1445#endif
1446
1447/*****************************************************************************/
1286 1448
1287ecb_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);
1288ecb_function_ ecb_const uint32_t 1450ecb_function_ ecb_const uint32_t
1289ecb_binary16_to_binary32 (uint32_t x) 1451ecb_binary16_to_binary32 (uint32_t x)
1290{ 1452{
… …
1399 || defined __sh__ \ 1561 || defined __sh__ \
1400 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ 1562 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1401 || (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__)) \
1402 || defined __aarch64__ 1564 || defined __aarch64__
1403 #define ECB_STDFP 1 1565 #define ECB_STDFP 1
1404 #include <string.h> /* for memcpy */
1405#else 1566#else
1406 #define ECB_STDFP 0 1567 #define ECB_STDFP 0
1407#endif 1568#endif
1408 1569
1409#ifndef ECB_NO_LIBM 1570#ifndef ECB_NO_LIBM
… …
1631 * our syscalls return < 0, not == -1, on error. which is good 1792 * our syscalls return < 0, not == -1, on error. which is good
1632 * enough for linux aio. 1793 * enough for linux aio.
1633 * TODO: arm is also common nowadays, maybe even mips and x86 1794 * TODO: arm is also common nowadays, maybe even mips and x86
1634 * 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...
1635 */ 1796 */
1636#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__ 1797#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1637 /* the costly errno access probably kills this for size optimisation */ 1798 /* the costly errno access probably kills this for size optimisation */
1638 1799
1639 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \ 1800 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1640 ({ \ 1801 ({ \
1641 long res; \ 1802 long res; \
… …
2235inline_size void 2396inline_size void
2236fd_reify (EV_P) 2397fd_reify (EV_P)
2237{ 2398{
2238 int i; 2399 int i;
2239 2400
2401 /* most backends do not modify the fdchanges list in backend_modfiy.
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
2240#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2413#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2241 for (i = 0; i < fdchangecnt; ++i) 2414 for (i = 0; i < changecnt; ++i)
2242 { 2415 {
2243 int fd = fdchanges [i]; 2416 int fd = fdchanges [i];
2244 ANFD *anfd = anfds + fd; 2417 ANFD *anfd = anfds + fd;
2245 2418
2246 if (anfd->reify & EV__IOFDSET && anfd->head) 2419 if (anfd->reify & EV__IOFDSET && anfd->head)
… …
2260 } 2433 }
2261 } 2434 }
2262 } 2435 }
2263#endif 2436#endif
2264 2437
2265 for (i = 0; i < fdchangecnt; ++i) 2438 for (i = 0; i < changecnt; ++i)
2266 { 2439 {
2267 int fd = fdchanges [i]; 2440 int fd = fdchanges [i];
2268 ANFD *anfd = anfds + fd; 2441 ANFD *anfd = anfds + fd;
2269 ev_io *w; 2442 ev_io *w;
2270 2443
… …
2286 2459
2287 if (o_reify & EV__IOFDSET) 2460 if (o_reify & EV__IOFDSET)
2288 backend_modify (EV_A_ fd, o_events, anfd->events); 2461 backend_modify (EV_A_ fd, o_events, anfd->events);
2289 } 2462 }
2290 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
2291 fdchangecnt = 0; 2471 fdchangecnt -= changecnt;
2292} 2472}
2293 2473
2294/* something about the given fd changed */ 2474/* something about the given fd changed */
2295inline_size 2475inline_size
2296void 2476void
2297fd_change (EV_P_ int fd, int flags) 2477fd_change (EV_P_ int fd, int flags)
2298{ 2478{
2299 unsigned char reify = anfds [fd].reify; 2479 unsigned char reify = anfds [fd].reify;
2300 anfds [fd].reify |= flags; 2480 anfds [fd].reify = reify | flags;
2301 2481
2302 if (ecb_expect_true (!reify)) 2482 if (ecb_expect_true (!reify))
2303 { 2483 {
2304 ++fdchangecnt; 2484 ++fdchangecnt;
2305 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit); 2485 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
… …
2534 upheap (heap, i + HEAP0); 2714 upheap (heap, i + HEAP0);
2535} 2715}
2536 2716
2537/*****************************************************************************/ 2717/*****************************************************************************/
2538 2718
2539/* associate signal watchers to a signal signal */ 2719/* associate signal watchers to a signal */
2540typedef struct 2720typedef struct
2541{ 2721{
2542 EV_ATOMIC_T pending; 2722 EV_ATOMIC_T pending;
2543#if EV_MULTIPLICITY 2723#if EV_MULTIPLICITY
2544 EV_P; 2724 EV_P;
… …
2848 3028
2849#endif 3029#endif
2850 3030
2851/*****************************************************************************/ 3031/*****************************************************************************/
2852 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
2853#if EV_USE_IOCP 3084#if EV_USE_IOCP
2854# include "ev_iocp.c" 3085# include "ev_iocp.c"
2855#endif 3086#endif
2856#if EV_USE_PORT 3087#if EV_USE_PORT
2857# include "ev_port.c" 3088# include "ev_port.c"
… …
2903unsigned int 3134unsigned int
2904ev_supported_backends (void) EV_NOEXCEPT 3135ev_supported_backends (void) EV_NOEXCEPT
2905{ 3136{
2906 unsigned int flags = 0; 3137 unsigned int flags = 0;
2907 3138
2908 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3139 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2909 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE; 3140 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
2910 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3141 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2911 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO; 3142 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
2912 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING; 3143 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
2913 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3144 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2914 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT; 3145 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
2915 3146
2916 return flags; 3147 return flags;
2917} 3148}
2918 3149
2919ecb_cold 3150ecb_cold
2920unsigned int 3151unsigned int
… …
2938 3169
2939 /* TODO: linuxaio is very experimental */ 3170 /* TODO: linuxaio is very experimental */
2940#if !EV_RECOMMEND_LINUXAIO 3171#if !EV_RECOMMEND_LINUXAIO
2941 flags &= ~EVBACKEND_LINUXAIO; 3172 flags &= ~EVBACKEND_LINUXAIO;
2942#endif 3173#endif
2943 /* TODO: linuxaio is super experimental */ 3174 /* TODO: iouring is super experimental */
2944#if !EV_RECOMMEND_IOURING 3175#if !EV_RECOMMEND_IOURING
2945 flags &= ~EVBACKEND_IOURING; 3176 flags &= ~EVBACKEND_IOURING;
2946#endif 3177#endif
2947 3178
2948 return flags; 3179 return flags;
… …
2950 3181
2951ecb_cold 3182ecb_cold
2952unsigned int 3183unsigned int
2953ev_embeddable_backends (void) EV_NOEXCEPT 3184ev_embeddable_backends (void) EV_NOEXCEPT
2954{ 3185{
2955 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3186 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
2956 3187
2957 /* 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 */
2958 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 */
2959 flags &= ~EVBACKEND_EPOLL; 3190 flags &= ~EVBACKEND_EPOLL;
2960 3191
2961 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */ 3192 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
2962
2963 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
2964 * because our backend_fd is the epoll fd we need as fallback.
2965 * if the kernel ever is fixed, this might change...
2966 */
2967 3193
2968 return flags; 3194 return flags;
2969} 3195}
2970 3196
2971unsigned int 3197unsigned int
… …
3089 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3315 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3090#endif 3316#endif
3091#if EV_USE_SIGNALFD 3317#if EV_USE_SIGNALFD
3092 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3318 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3093#endif 3319#endif
3320#if EV_USE_TIMERFD
3321 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3322#endif
3094 3323
3095 if (!(flags & EVBACKEND_MASK)) 3324 if (!(flags & EVBACKEND_MASK))
3096 flags |= ev_recommended_backends (); 3325 flags |= ev_recommended_backends ();
3097 3326
3098#if EV_USE_IOCP 3327#if EV_USE_IOCP
… …
3169 } 3398 }
3170 3399
3171#if EV_USE_SIGNALFD 3400#if EV_USE_SIGNALFD
3172 if (ev_is_active (&sigfd_w)) 3401 if (ev_is_active (&sigfd_w))
3173 close (sigfd); 3402 close (sigfd);
3403#endif
3404
3405#if EV_USE_TIMERFD
3406 if (ev_is_active (&timerfd_w))
3407 close (timerfd);
3174#endif 3408#endif
3175 3409
3176#if EV_USE_INOTIFY 3410#if EV_USE_INOTIFY
3177 if (fs_fd >= 0) 3411 if (fs_fd >= 0)
3178 close (fs_fd); 3412 close (fs_fd);
… …
3271#endif 3505#endif
3272#if EV_USE_INOTIFY 3506#if EV_USE_INOTIFY
3273 infy_fork (EV_A); 3507 infy_fork (EV_A);
3274#endif 3508#endif
3275 3509
3510 if (postfork != 2)
3511 {
3512 #if EV_USE_SIGNALFD
3513 /* surprisingly, nothing needs to be done for signalfd, accoridng 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
3276#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3531 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3277 if (ev_is_active (&pipe_w) && postfork != 2) 3532 if (ev_is_active (&pipe_w))
3278 { 3533 {
3279 /* 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 */
3280 3535
3281 ev_ref (EV_A); 3536 ev_ref (EV_A);
3282 ev_io_stop (EV_A_ &pipe_w); 3537 ev_io_stop (EV_A_ &pipe_w);
3283 3538
3284 if (evpipe [0] >= 0) 3539 if (evpipe [0] >= 0)
3285 EV_WIN32_CLOSE_FD (evpipe [0]); 3540 EV_WIN32_CLOSE_FD (evpipe [0]);
3286 3541
3287 evpipe_init (EV_A); 3542 evpipe_init (EV_A);
3288 /* iterate over everything, in case we missed something before */ 3543 /* iterate over everything, in case we missed something before */
3289 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3544 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3545 }
3546 #endif
3290 } 3547 }
3291#endif
3292 3548
3293 postfork = 0; 3549 postfork = 0;
3294} 3550}
3295 3551
3296#if EV_MULTIPLICITY 3552#if EV_MULTIPLICITY
… …
3840 4096
3841 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)))
3842 { 4098 {
3843 waittime = EV_TS_CONST (MAX_BLOCKTIME); 4099 waittime = EV_TS_CONST (MAX_BLOCKTIME);
3844 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
4116
3845 if (timercnt) 4117 if (timercnt)
3846 { 4118 {
3847 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4119 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3848 if (waittime > to) waittime = to; 4120 if (waittime > to) waittime = to;
3849 } 4121 }
… …
3858 4130
3859 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4131 /* don't let timeouts decrease the waittime below timeout_blocktime */
3860 if (ecb_expect_false (waittime < timeout_blocktime)) 4132 if (ecb_expect_false (waittime < timeout_blocktime))
3861 waittime = timeout_blocktime; 4133 waittime = timeout_blocktime;
3862 4134
3863 /* at this point, we NEED to wait, so we have to ensure */ 4135 /* now there are two more special cases left, either we have
3864 /* 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 */
3865 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.)
3866 waittime = backend_mintime; 4143 : backend_mintime;
3867 4144
3868 /* extra check because io_blocktime is commonly 0 */ 4145 /* extra check because io_blocktime is commonly 0 */
3869 if (ecb_expect_false (io_blocktime)) 4146 if (ecb_expect_false (io_blocktime))
3870 { 4147 {
3871 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4148 sleeptime = io_blocktime - (mn_now - prev_mn_now);
… …
4206void 4483void
4207ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT 4484ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
4208{ 4485{
4209 if (ecb_expect_false (ev_is_active (w))) 4486 if (ecb_expect_false (ev_is_active (w)))
4210 return; 4487 return;
4488
4489#if EV_USE_TIMERFD
4490 if (timerfd == -2)
4491 evtimerfd_init (EV_A);
4492#endif
4211 4493
4212 if (w->reschedule_cb) 4494 if (w->reschedule_cb)
4213 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4495 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
4214 else if (w->interval) 4496 else if (w->interval)
4215 { 4497 {
… …
4957 ev_run (EV_A_ EVRUN_NOWAIT); 5239 ev_run (EV_A_ EVRUN_NOWAIT);
4958 } 5240 }
4959 } 5241 }
4960} 5242}
4961 5243
5244#if EV_FORK_ENABLE
4962static void 5245static void
4963embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5246embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4964{ 5247{
4965 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));
4966 5249
… …
4973 ev_run (EV_A_ EVRUN_NOWAIT); 5256 ev_run (EV_A_ EVRUN_NOWAIT);
4974 } 5257 }
4975 5258
4976 ev_embed_start (EV_A_ w); 5259 ev_embed_start (EV_A_ w);
4977} 5260}
5261#endif
4978 5262
4979#if 0 5263#if 0
4980static void 5264static void
4981embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5265embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4982{ 5266{
… …
5003 5287
5004 ev_prepare_init (&w->prepare, embed_prepare_cb); 5288 ev_prepare_init (&w->prepare, embed_prepare_cb);
5005 ev_set_priority (&w->prepare, EV_MINPRI); 5289 ev_set_priority (&w->prepare, EV_MINPRI);
5006 ev_prepare_start (EV_A_ &w->prepare); 5290 ev_prepare_start (EV_A_ &w->prepare);
5007 5291
5292#if EV_FORK_ENABLE
5008 ev_fork_init (&w->fork, embed_fork_cb); 5293 ev_fork_init (&w->fork, embed_fork_cb);
5009 ev_fork_start (EV_A_ &w->fork); 5294 ev_fork_start (EV_A_ &w->fork);
5295#endif
5010 5296
5011 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5297 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
5012 5298
5013 ev_start (EV_A_ (W)w, 1); 5299 ev_start (EV_A_ (W)w, 1);
5014 5300
… …
5024 5310
5025 EV_FREQUENT_CHECK; 5311 EV_FREQUENT_CHECK;
5026 5312
5027 ev_io_stop (EV_A_ &w->io); 5313 ev_io_stop (EV_A_ &w->io);
5028 ev_prepare_stop (EV_A_ &w->prepare); 5314 ev_prepare_stop (EV_A_ &w->prepare);
5315#if EV_FORK_ENABLE
5029 ev_fork_stop (EV_A_ &w->fork); 5316 ev_fork_stop (EV_A_ &w->fork);
5317#endif
5030 5318
5031 ev_stop (EV_A_ (W)w); 5319 ev_stop (EV_A_ (W)w);
5032 5320
5033 EV_FREQUENT_CHECK; 5321 EV_FREQUENT_CHECK;
5034} 5322}

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