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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 1.525 by root, Wed Jan 22 14:09:07 2020 UTC

… …
117# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
118# endif 118# endif
119 119
120# if HAVE_LINUX_AIO_ABI_H 120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO 121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS 122# define EV_USE_LINUXAIO 0 /* was: EV_FEATURE_BACKENDS, always off by default */
123# endif 123# endif
124# else 124# else
125# undef EV_USE_LINUXAIO 125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0 126# define EV_USE_LINUXAIO 0
127# endif 127# endif
… …
178# else 178# else
179# undef EV_USE_EVENTFD 179# undef EV_USE_EVENTFD
180# define EV_USE_EVENTFD 0 180# define EV_USE_EVENTFD 0
181# endif 181# endif
182 182
183# if HAVE_SYS_TIMERFD_H
184# ifndef EV_USE_TIMERFD
185# define EV_USE_TIMERFD EV_FEATURE_OS
186# endif
187# else
188# undef EV_USE_TIMERFD
189# define EV_USE_TIMERFD 0
190# endif
191
183#endif 192#endif
184 193
185/* OS X, in its infinite idiocy, actually HARDCODES 194/* OS X, in its infinite idiocy, actually HARDCODES
186 * a limit of 1024 into their select. Where people have brains, 195 * a limit of 1024 into their select. Where people have brains,
187 * OS X engineers apparently have a vacuum. Or maybe they were 196 * OS X engineers apparently have a vacuum. Or maybe they were
… …
335# define EV_USE_PORT 0 344# define EV_USE_PORT 0
336#endif 345#endif
337 346
338#ifndef EV_USE_LINUXAIO 347#ifndef EV_USE_LINUXAIO
339# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */ 348# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
340# define EV_USE_LINUXAIO 1 349# define EV_USE_LINUXAIO 0 /* was: 1, always off by default */
341# else 350# else
342# define EV_USE_LINUXAIO 0 351# define EV_USE_LINUXAIO 0
343# endif 352# endif
344#endif 353#endif
345 354
… …
378#ifndef EV_USE_SIGNALFD 387#ifndef EV_USE_SIGNALFD
379# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 388# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
380# define EV_USE_SIGNALFD EV_FEATURE_OS 389# define EV_USE_SIGNALFD EV_FEATURE_OS
381# else 390# else
382# define EV_USE_SIGNALFD 0 391# define EV_USE_SIGNALFD 0
392# endif
393#endif
394
395#ifndef EV_USE_TIMERFD
396# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 8))
397# define EV_USE_TIMERFD EV_FEATURE_OS
398# else
399# define EV_USE_TIMERFD 0
383# endif 400# endif
384#endif 401#endif
385 402
386#if 0 /* debugging */ 403#if 0 /* debugging */
387# define EV_VERIFY 3 404# define EV_VERIFY 3
… …
448# undef EV_USE_INOTIFY 465# undef EV_USE_INOTIFY
449# define EV_USE_INOTIFY 0 466# define EV_USE_INOTIFY 0
450#endif 467#endif
451 468
452#if __linux && EV_USE_IOURING 469#if __linux && EV_USE_IOURING
453# include <linux/fs.h> 470# include <linux/version.h>
454# ifndef RWF_SYNC 471# if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
455# undef EV_USE_IOURING 472# undef EV_USE_IOURING
456# define EV_USE_IOURING 0 473# define EV_USE_IOURING 0
457# endif 474# endif
458#endif 475#endif
459 476
… …
498# define EV_USE_INOTIFY 0 515# define EV_USE_INOTIFY 0
499# endif 516# endif
500#endif 517#endif
501 518
502#if EV_USE_EVENTFD 519#if EV_USE_EVENTFD
503/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 520/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
504# include <stdint.h> 521# include <stdint.h>
505# ifndef EFD_NONBLOCK 522# ifndef EFD_NONBLOCK
506# define EFD_NONBLOCK O_NONBLOCK 523# define EFD_NONBLOCK O_NONBLOCK
507# endif 524# endif
508# ifndef EFD_CLOEXEC 525# ifndef EFD_CLOEXEC
… …
514# endif 531# endif
515EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); 532EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
516#endif 533#endif
517 534
518#if EV_USE_SIGNALFD 535#if EV_USE_SIGNALFD
519/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 536/* our minimum requirement is glibc 2.7 which has the stub, but not the full header */
520# include <stdint.h> 537# include <stdint.h>
521# ifndef SFD_NONBLOCK 538# ifndef SFD_NONBLOCK
522# define SFD_NONBLOCK O_NONBLOCK 539# define SFD_NONBLOCK O_NONBLOCK
523# endif 540# endif
524# ifndef SFD_CLOEXEC 541# ifndef SFD_CLOEXEC
… …
526# define SFD_CLOEXEC O_CLOEXEC 543# define SFD_CLOEXEC O_CLOEXEC
527# else 544# else
528# define SFD_CLOEXEC 02000000 545# define SFD_CLOEXEC 02000000
529# endif 546# endif
530# endif 547# endif
531EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags); 548EV_CPP (extern "C") int (signalfd) (int fd, const sigset_t *mask, int flags);
532 549
533struct signalfd_siginfo 550struct signalfd_siginfo
534{ 551{
535 uint32_t ssi_signo; 552 uint32_t ssi_signo;
536 char pad[128 - sizeof (uint32_t)]; 553 char pad[128 - sizeof (uint32_t)];
537}; 554};
555#endif
556
557/* for timerfd, libev core requires TFD_TIMER_CANCEL_ON_SET &c */
558#if EV_USE_TIMERFD
559# include <sys/timerfd.h>
560/* timerfd is only used for periodics */
561# if !(defined (TFD_TIMER_CANCEL_ON_SET) && defined (TFD_CLOEXEC) && defined (TFD_NONBLOCK)) || !EV_PERIODIC_ENABLE
562# undef EV_USE_TIMERFD
563# define EV_USE_TIMERFD 0
564# endif
538#endif 565#endif
539 566
540/*****************************************************************************/ 567/*****************************************************************************/
541 568
542#if EV_VERIFY >= 3 569#if EV_VERIFY >= 3
… …
552#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ 579#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
553/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 580/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
554 581
555#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 582#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) */ 583#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
584#define MAX_BLOCKTIME2 1500001.07 /* same, but when timerfd is used to detect jumps, also safe delay to not overflow */
557 585
558/* find a portable timestamp that is "always" in the future but fits into time_t. 586/* 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, 587 * 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 */ 588 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
561#define EV_TSTAMP_HUGE \ 589#define EV_TSTAMP_HUGE \
… …
617 645
618#ifndef ECB_H 646#ifndef ECB_H
619#define ECB_H 647#define ECB_H
620 648
621/* 16 bits major, 16 bits minor */ 649/* 16 bits major, 16 bits minor */
622#define ECB_VERSION 0x00010006 650#define ECB_VERSION 0x00010008
651
652#include <string.h> /* for memcpy */
623 653
624#ifdef _WIN32 654#ifdef _WIN32
625 typedef signed char int8_t; 655 typedef signed char int8_t;
626 typedef unsigned char uint8_t; 656 typedef unsigned char uint8_t;
657 typedef signed char int_fast8_t;
658 typedef unsigned char uint_fast8_t;
627 typedef signed short int16_t; 659 typedef signed short int16_t;
628 typedef unsigned short uint16_t; 660 typedef unsigned short uint16_t;
661 typedef signed int int_fast16_t;
662 typedef unsigned int uint_fast16_t;
629 typedef signed int int32_t; 663 typedef signed int int32_t;
630 typedef unsigned int uint32_t; 664 typedef unsigned int uint32_t;
665 typedef signed int int_fast32_t;
666 typedef unsigned int uint_fast32_t;
631 #if __GNUC__ 667 #if __GNUC__
632 typedef signed long long int64_t; 668 typedef signed long long int64_t;
633 typedef unsigned long long uint64_t; 669 typedef unsigned long long uint64_t;
634 #else /* _MSC_VER || __BORLANDC__ */ 670 #else /* _MSC_VER || __BORLANDC__ */
635 typedef signed __int64 int64_t; 671 typedef signed __int64 int64_t;
636 typedef unsigned __int64 uint64_t; 672 typedef unsigned __int64 uint64_t;
637 #endif 673 #endif
674 typedef int64_t int_fast64_t;
675 typedef uint64_t uint_fast64_t;
638 #ifdef _WIN64 676 #ifdef _WIN64
639 #define ECB_PTRSIZE 8 677 #define ECB_PTRSIZE 8
640 typedef uint64_t uintptr_t; 678 typedef uint64_t uintptr_t;
641 typedef int64_t intptr_t; 679 typedef int64_t intptr_t;
642 #else 680 #else
… …
653 #endif 691 #endif
654#endif 692#endif
655 693
656#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) 694#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
657#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) 695#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
696
697#ifndef ECB_OPTIMIZE_SIZE
698 #if __OPTIMIZE_SIZE__
699 #define ECB_OPTIMIZE_SIZE 1
700 #else
701 #define ECB_OPTIMIZE_SIZE 0
702 #endif
703#endif
658 704
659/* work around x32 idiocy by defining proper macros */ 705/* work around x32 idiocy by defining proper macros */
660#if ECB_GCC_AMD64 || ECB_MSVC_AMD64 706#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
661 #if _ILP32 707 #if _ILP32
662 #define ECB_AMD64_X32 1 708 #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); } 1215ecb_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); } 1216ecb_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); } 1217ecb_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); } 1218ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1173 1219
1220#if ECB_CPP
1221
1222inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); }
1223inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); }
1224inline uint32_t ecb_ctz (uint32_t v) { return ecb_ctz32 (v); }
1225inline uint64_t ecb_ctz (uint64_t v) { return ecb_ctz64 (v); }
1226
1227inline bool ecb_is_pot (uint8_t v) { return ecb_is_pot32 (v); }
1228inline bool ecb_is_pot (uint16_t v) { return ecb_is_pot32 (v); }
1229inline bool ecb_is_pot (uint32_t v) { return ecb_is_pot32 (v); }
1230inline bool ecb_is_pot (uint64_t v) { return ecb_is_pot64 (v); }
1231
1232inline int ecb_ld (uint8_t v) { return ecb_ld32 (v); }
1233inline int ecb_ld (uint16_t v) { return ecb_ld32 (v); }
1234inline int ecb_ld (uint32_t v) { return ecb_ld32 (v); }
1235inline int ecb_ld (uint64_t v) { return ecb_ld64 (v); }
1236
1237inline int ecb_popcount (uint8_t v) { return ecb_popcount32 (v); }
1238inline int ecb_popcount (uint16_t v) { return ecb_popcount32 (v); }
1239inline int ecb_popcount (uint32_t v) { return ecb_popcount32 (v); }
1240inline int ecb_popcount (uint64_t v) { return ecb_popcount64 (v); }
1241
1242inline uint8_t ecb_bitrev (uint8_t v) { return ecb_bitrev8 (v); }
1243inline uint16_t ecb_bitrev (uint16_t v) { return ecb_bitrev16 (v); }
1244inline uint32_t ecb_bitrev (uint32_t v) { return ecb_bitrev32 (v); }
1245
1246inline uint8_t ecb_rotl (uint8_t v, unsigned int count) { return ecb_rotl8 (v, count); }
1247inline uint16_t ecb_rotl (uint16_t v, unsigned int count) { return ecb_rotl16 (v, count); }
1248inline uint32_t ecb_rotl (uint32_t v, unsigned int count) { return ecb_rotl32 (v, count); }
1249inline uint64_t ecb_rotl (uint64_t v, unsigned int count) { return ecb_rotl64 (v, count); }
1250
1251inline uint8_t ecb_rotr (uint8_t v, unsigned int count) { return ecb_rotr8 (v, count); }
1252inline uint16_t ecb_rotr (uint16_t v, unsigned int count) { return ecb_rotr16 (v, count); }
1253inline uint32_t ecb_rotr (uint32_t v, unsigned int count) { return ecb_rotr32 (v, count); }
1254inline uint64_t ecb_rotr (uint64_t v, unsigned int count) { return ecb_rotr64 (v, count); }
1255
1256#endif
1257
1174#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) 1258#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) 1259 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1176 #define ecb_bswap16(x) __builtin_bswap16 (x) 1260 #define ecb_bswap16(x) __builtin_bswap16 (x)
1177 #else 1261 #else
1178 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1262 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
… …
1249ecb_inline ecb_const ecb_bool ecb_big_endian (void); 1333ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1250ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } 1334ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1251ecb_inline ecb_const ecb_bool ecb_little_endian (void); 1335ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1252ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } 1336ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1253 1337
1338/*****************************************************************************/
1339/* unaligned load/store */
1340
1341ecb_inline uint_fast16_t ecb_be_u16_to_host (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1342ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1343ecb_inline uint_fast64_t ecb_be_u64_to_host (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1344
1345ecb_inline uint_fast16_t ecb_le_u16_to_host (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1346ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1347ecb_inline uint_fast64_t ecb_le_u64_to_host (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1348
1349ecb_inline uint_fast16_t ecb_peek_u16_u (const void *ptr) { uint16_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1350ecb_inline uint_fast32_t ecb_peek_u32_u (const void *ptr) { uint32_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1351ecb_inline uint_fast64_t ecb_peek_u64_u (const void *ptr) { uint64_t v; memcpy (&v, ptr, sizeof (v)); return v; }
1352
1353ecb_inline uint_fast16_t ecb_peek_be_u16_u (const void *ptr) { return ecb_be_u16_to_host (ecb_peek_u16_u (ptr)); }
1354ecb_inline uint_fast32_t ecb_peek_be_u32_u (const void *ptr) { return ecb_be_u32_to_host (ecb_peek_u32_u (ptr)); }
1355ecb_inline uint_fast64_t ecb_peek_be_u64_u (const void *ptr) { return ecb_be_u64_to_host (ecb_peek_u64_u (ptr)); }
1356
1357ecb_inline uint_fast16_t ecb_peek_le_u16_u (const void *ptr) { return ecb_le_u16_to_host (ecb_peek_u16_u (ptr)); }
1358ecb_inline uint_fast32_t ecb_peek_le_u32_u (const void *ptr) { return ecb_le_u32_to_host (ecb_peek_u32_u (ptr)); }
1359ecb_inline uint_fast64_t ecb_peek_le_u64_u (const void *ptr) { return ecb_le_u64_to_host (ecb_peek_u64_u (ptr)); }
1360
1361ecb_inline uint_fast16_t ecb_host_to_be_u16 (uint_fast16_t v) { return ecb_little_endian () ? ecb_bswap16 (v) : v; }
1362ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
1363ecb_inline uint_fast64_t ecb_host_to_be_u64 (uint_fast64_t v) { return ecb_little_endian () ? ecb_bswap64 (v) : v; }
1364
1365ecb_inline uint_fast16_t ecb_host_to_le_u16 (uint_fast16_t v) { return ecb_big_endian () ? ecb_bswap16 (v) : v; }
1366ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
1367ecb_inline uint_fast64_t ecb_host_to_le_u64 (uint_fast64_t v) { return ecb_big_endian () ? ecb_bswap64 (v) : v; }
1368
1369ecb_inline void ecb_poke_u16_u (void *ptr, uint16_t v) { memcpy (ptr, &v, sizeof (v)); }
1370ecb_inline void ecb_poke_u32_u (void *ptr, uint32_t v) { memcpy (ptr, &v, sizeof (v)); }
1371ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); }
1372
1373ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); }
1374ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
1375ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); }
1376
1377ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); }
1378ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
1379ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); }
1380
1381#if ECB_CPP
1382
1383inline uint8_t ecb_bswap (uint8_t v) { return v; }
1384inline uint16_t ecb_bswap (uint16_t v) { return ecb_bswap16 (v); }
1385inline uint32_t ecb_bswap (uint32_t v) { return ecb_bswap32 (v); }
1386inline uint64_t ecb_bswap (uint64_t v) { return ecb_bswap64 (v); }
1387
1388template<typename T> inline T ecb_be_to_host (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1389template<typename T> inline T ecb_le_to_host (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1390template<typename T> inline T ecb_peek (const void *ptr) { return *(const T *)ptr; }
1391template<typename T> inline T ecb_peek_be (const void *ptr) { return ecb_be_to_host (ecb_peek <T> (ptr)); }
1392template<typename T> inline T ecb_peek_le (const void *ptr) { return ecb_le_to_host (ecb_peek <T> (ptr)); }
1393template<typename T> inline T ecb_peek_u (const void *ptr) { T v; memcpy (&v, ptr, sizeof (v)); return v; }
1394template<typename T> inline T ecb_peek_be_u (const void *ptr) { return ecb_be_to_host (ecb_peek_u<T> (ptr)); }
1395template<typename T> inline T ecb_peek_le_u (const void *ptr) { return ecb_le_to_host (ecb_peek_u<T> (ptr)); }
1396
1397template<typename T> inline T ecb_host_to_be (T v) { return ecb_little_endian () ? ecb_bswap (v) : v; }
1398template<typename T> inline T ecb_host_to_le (T v) { return ecb_big_endian () ? ecb_bswap (v) : v; }
1399template<typename T> inline void ecb_poke (void *ptr, T v) { *(T *)ptr = v; }
1400template<typename T> inline void ecb_poke_be (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_be (v)); }
1401template<typename T> inline void ecb_poke_le (void *ptr, T v) { return ecb_poke <T> (ptr, ecb_host_to_le (v)); }
1402template<typename T> inline void ecb_poke_u (void *ptr, T v) { memcpy (ptr, &v, sizeof (v)); }
1403template<typename T> inline void ecb_poke_be_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_be (v)); }
1404template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); }
1405
1406#endif
1407
1408/*****************************************************************************/
1409
1254#if ECB_GCC_VERSION(3,0) || ECB_C99 1410#if ECB_GCC_VERSION(3,0) || ECB_C99
1255 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 1411 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1256#else 1412#else
1257 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 1413 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1258#endif 1414#endif
… …
1281 return N; 1437 return N;
1282 } 1438 }
1283#else 1439#else
1284 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1440 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1285#endif 1441#endif
1442
1443/*****************************************************************************/
1286 1444
1287ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); 1445ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1288ecb_function_ ecb_const uint32_t 1446ecb_function_ ecb_const uint32_t
1289ecb_binary16_to_binary32 (uint32_t x) 1447ecb_binary16_to_binary32 (uint32_t x)
1290{ 1448{
… …
1399 || defined __sh__ \ 1557 || defined __sh__ \
1400 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ 1558 || 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__)) \ 1559 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1402 || defined __aarch64__ 1560 || defined __aarch64__
1403 #define ECB_STDFP 1 1561 #define ECB_STDFP 1
1404 #include <string.h> /* for memcpy */
1405#else 1562#else
1406 #define ECB_STDFP 0 1563 #define ECB_STDFP 0
1407#endif 1564#endif
1408 1565
1409#ifndef ECB_NO_LIBM 1566#ifndef ECB_NO_LIBM
… …
1631 * our syscalls return < 0, not == -1, on error. which is good 1788 * our syscalls return < 0, not == -1, on error. which is good
1632 * enough for linux aio. 1789 * enough for linux aio.
1633 * TODO: arm is also common nowadays, maybe even mips and x86 1790 * 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... 1791 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1635 */ 1792 */
1636#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__ 1793#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
1637 /* the costly errno access probably kills this for size optimisation */ 1794 /* the costly errno access probably kills this for size optimisation */
1638 1795
1639 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \ 1796 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1640 ({ \ 1797 ({ \
1641 long res; \ 1798 long res; \
… …
2235inline_size void 2392inline_size void
2236fd_reify (EV_P) 2393fd_reify (EV_P)
2237{ 2394{
2238 int i; 2395 int i;
2239 2396
2397 /* most backends do not modify the fdchanges list in backend_modfiy.
2398 * except io_uring, which has fixed-size buffers which might force us
2399 * to handle events in backend_modify, causing fdchanges to be amended,
2400 * which could result in an endless loop.
2401 * to avoid this, we do not dynamically handle fds that were added
2402 * during fd_reify. that means that for those backends, fdchangecnt
2403 * might be non-zero during poll, which must cause them to not block.
2404 * to not put too much of a burden on other backends, this detail
2405 * needs to be handled in the backend.
2406 */
2407 int changecnt = fdchangecnt;
2408
2240#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 2409#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2241 for (i = 0; i < fdchangecnt; ++i) 2410 for (i = 0; i < changecnt; ++i)
2242 { 2411 {
2243 int fd = fdchanges [i]; 2412 int fd = fdchanges [i];
2244 ANFD *anfd = anfds + fd; 2413 ANFD *anfd = anfds + fd;
2245 2414
2246 if (anfd->reify & EV__IOFDSET && anfd->head) 2415 if (anfd->reify & EV__IOFDSET && anfd->head)
… …
2260 } 2429 }
2261 } 2430 }
2262 } 2431 }
2263#endif 2432#endif
2264 2433
2265 for (i = 0; i < fdchangecnt; ++i) 2434 for (i = 0; i < changecnt; ++i)
2266 { 2435 {
2267 int fd = fdchanges [i]; 2436 int fd = fdchanges [i];
2268 ANFD *anfd = anfds + fd; 2437 ANFD *anfd = anfds + fd;
2269 ev_io *w; 2438 ev_io *w;
2270 2439
… …
2286 2455
2287 if (o_reify & EV__IOFDSET) 2456 if (o_reify & EV__IOFDSET)
2288 backend_modify (EV_A_ fd, o_events, anfd->events); 2457 backend_modify (EV_A_ fd, o_events, anfd->events);
2289 } 2458 }
2290 2459
2460 /* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
2461 * this is a rare case (see beginning comment in this function), so we copy them to the
2462 * front and hope the backend handles this case.
2463 */
2464 if (ecb_expect_false (fdchangecnt != changecnt))
2465 memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
2466
2291 fdchangecnt = 0; 2467 fdchangecnt -= changecnt;
2292} 2468}
2293 2469
2294/* something about the given fd changed */ 2470/* something about the given fd changed */
2295inline_size 2471inline_size
2296void 2472void
… …
2534 upheap (heap, i + HEAP0); 2710 upheap (heap, i + HEAP0);
2535} 2711}
2536 2712
2537/*****************************************************************************/ 2713/*****************************************************************************/
2538 2714
2539/* associate signal watchers to a signal signal */ 2715/* associate signal watchers to a signal */
2540typedef struct 2716typedef struct
2541{ 2717{
2542 EV_ATOMIC_T pending; 2718 EV_ATOMIC_T pending;
2543#if EV_MULTIPLICITY 2719#if EV_MULTIPLICITY
2544 EV_P; 2720 EV_P;
… …
2848 3024
2849#endif 3025#endif
2850 3026
2851/*****************************************************************************/ 3027/*****************************************************************************/
2852 3028
3029#if EV_USE_TIMERFD
3030
3031static void periodics_reschedule (EV_P);
3032
3033static void
3034timerfdcb (EV_P_ ev_io *iow, int revents)
3035{
3036 struct itimerspec its = { 0 };
3037
3038 its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2;
3039 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
3040
3041 ev_rt_now = ev_time ();
3042 /* periodics_reschedule only needs ev_rt_now */
3043 /* but maybe in the future we want the full treatment. */
3044 /*
3045 now_floor = EV_TS_CONST (0.);
3046 time_update (EV_A_ EV_TSTAMP_HUGE);
3047 */
3048#if EV_PERIODIC_ENABLE
3049 periodics_reschedule (EV_A);
3050#endif
3051}
3052
3053ecb_noinline ecb_cold
3054static void
3055evtimerfd_init (EV_P)
3056{
3057 if (!ev_is_active (&timerfd_w))
3058 {
3059 timerfd = timerfd_create (CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
3060
3061 if (timerfd >= 0)
3062 {
3063 fd_intern (timerfd); /* just to be sure */
3064
3065 ev_io_init (&timerfd_w, timerfdcb, timerfd, EV_READ);
3066 ev_set_priority (&timerfd_w, EV_MINPRI);
3067 ev_io_start (EV_A_ &timerfd_w);
3068 ev_unref (EV_A); /* watcher should not keep loop alive */
3069
3070 /* (re-) arm timer */
3071 timerfdcb (EV_A_ 0, 0);
3072 }
3073 }
3074}
3075
3076#endif
3077
3078/*****************************************************************************/
3079
2853#if EV_USE_IOCP 3080#if EV_USE_IOCP
2854# include "ev_iocp.c" 3081# include "ev_iocp.c"
2855#endif 3082#endif
2856#if EV_USE_PORT 3083#if EV_USE_PORT
2857# include "ev_port.c" 3084# include "ev_port.c"
… …
2903unsigned int 3130unsigned int
2904ev_supported_backends (void) EV_NOEXCEPT 3131ev_supported_backends (void) EV_NOEXCEPT
2905{ 3132{
2906 unsigned int flags = 0; 3133 unsigned int flags = 0;
2907 3134
2908 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 3135 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2909 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE; 3136 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
2910 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 3137 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2911 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO; 3138 if (EV_USE_LINUXAIO ) flags |= EVBACKEND_LINUXAIO;
2912 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING; 3139 if (EV_USE_IOURING && ev_linux_version () >= 0x050601) flags |= EVBACKEND_IOURING; /* 5.6.1+ */
2913 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 3140 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2914 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT; 3141 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
2915 3142
2916 return flags; 3143 return flags;
2917} 3144}
2918 3145
2919ecb_cold 3146ecb_cold
2920unsigned int 3147unsigned int
… …
2950 3177
2951ecb_cold 3178ecb_cold
2952unsigned int 3179unsigned int
2953ev_embeddable_backends (void) EV_NOEXCEPT 3180ev_embeddable_backends (void) EV_NOEXCEPT
2954{ 3181{
2955 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3182 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
2956 3183
2957 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 3184 /* 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 */ 3185 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2959 flags &= ~EVBACKEND_EPOLL; 3186 flags &= ~EVBACKEND_EPOLL;
2960 3187
2961 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */ 3188 /* 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 3189
2968 return flags; 3190 return flags;
2969} 3191}
2970 3192
2971unsigned int 3193unsigned int
… …
3089 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 3311 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3090#endif 3312#endif
3091#if EV_USE_SIGNALFD 3313#if EV_USE_SIGNALFD
3092 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 3314 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3093#endif 3315#endif
3316#if EV_USE_TIMERFD
3317 timerfd = flags & EVFLAG_NOTIMERFD ? -1 : -2;
3318#endif
3094 3319
3095 if (!(flags & EVBACKEND_MASK)) 3320 if (!(flags & EVBACKEND_MASK))
3096 flags |= ev_recommended_backends (); 3321 flags |= ev_recommended_backends ();
3097 3322
3098#if EV_USE_IOCP 3323#if EV_USE_IOCP
… …
3169 } 3394 }
3170 3395
3171#if EV_USE_SIGNALFD 3396#if EV_USE_SIGNALFD
3172 if (ev_is_active (&sigfd_w)) 3397 if (ev_is_active (&sigfd_w))
3173 close (sigfd); 3398 close (sigfd);
3399#endif
3400
3401#if EV_USE_TIMERFD
3402 if (ev_is_active (&timerfd_w))
3403 close (timerfd);
3174#endif 3404#endif
3175 3405
3176#if EV_USE_INOTIFY 3406#if EV_USE_INOTIFY
3177 if (fs_fd >= 0) 3407 if (fs_fd >= 0)
3178 close (fs_fd); 3408 close (fs_fd);
… …
3271#endif 3501#endif
3272#if EV_USE_INOTIFY 3502#if EV_USE_INOTIFY
3273 infy_fork (EV_A); 3503 infy_fork (EV_A);
3274#endif 3504#endif
3275 3505
3506 if (postfork != 2)
3507 {
3508 #if EV_USE_SIGNALFD
3509 /* surprisingly, nothing needs to be done for signalfd, accoridng to docs, it does the right thing on fork */
3510 #endif
3511
3512 #if EV_USE_TIMERFD
3513 if (ev_is_active (&timerfd_w))
3514 {
3515 ev_ref (EV_A);
3516 ev_io_stop (EV_A_ &timerfd_w);
3517
3518 close (timerfd);
3519 timerfd = -2;
3520
3521 evtimerfd_init (EV_A);
3522 /* reschedule periodics, in case we missed something */
3523 ev_feed_event (EV_A_ &timerfd_w, EV_CUSTOM);
3524 }
3525 #endif
3526
3276#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 3527 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3277 if (ev_is_active (&pipe_w) && postfork != 2) 3528 if (ev_is_active (&pipe_w))
3278 { 3529 {
3279 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ 3530 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3280 3531
3281 ev_ref (EV_A); 3532 ev_ref (EV_A);
3282 ev_io_stop (EV_A_ &pipe_w); 3533 ev_io_stop (EV_A_ &pipe_w);
3283 3534
3284 if (evpipe [0] >= 0) 3535 if (evpipe [0] >= 0)
3285 EV_WIN32_CLOSE_FD (evpipe [0]); 3536 EV_WIN32_CLOSE_FD (evpipe [0]);
3286 3537
3287 evpipe_init (EV_A); 3538 evpipe_init (EV_A);
3288 /* iterate over everything, in case we missed something before */ 3539 /* iterate over everything, in case we missed something before */
3289 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); 3540 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3541 }
3542 #endif
3290 } 3543 }
3291#endif
3292 3544
3293 postfork = 0; 3545 postfork = 0;
3294} 3546}
3295 3547
3296#if EV_MULTIPLICITY 3548#if EV_MULTIPLICITY
… …
3840 4092
3841 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) 4093 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3842 { 4094 {
3843 waittime = EV_TS_CONST (MAX_BLOCKTIME); 4095 waittime = EV_TS_CONST (MAX_BLOCKTIME);
3844 4096
4097#if EV_USE_TIMERFD
4098 /* sleep a lot longer when we can reliably detect timejumps */
4099 if (ecb_expect_true (timerfd >= 0))
4100 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4101#endif
4102#if !EV_PERIODIC_ENABLE
4103 /* without periodics but with monotonic clock there is no need */
4104 /* for any time jump detection, so sleep longer */
4105 if (ecb_expect_true (have_monotonic))
4106 waittime = EV_TS_CONST (MAX_BLOCKTIME2);
4107#endif
4108
3845 if (timercnt) 4109 if (timercnt)
3846 { 4110 {
3847 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4111 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3848 if (waittime > to) waittime = to; 4112 if (waittime > to) waittime = to;
3849 } 4113 }
… …
3858 4122
3859 /* don't let timeouts decrease the waittime below timeout_blocktime */ 4123 /* don't let timeouts decrease the waittime below timeout_blocktime */
3860 if (ecb_expect_false (waittime < timeout_blocktime)) 4124 if (ecb_expect_false (waittime < timeout_blocktime))
3861 waittime = timeout_blocktime; 4125 waittime = timeout_blocktime;
3862 4126
3863 /* at this point, we NEED to wait, so we have to ensure */ 4127 /* now there are two more special cases left, either we have
3864 /* to pass a minimum nonzero value to the backend */ 4128 * already-expired timers, so we should not sleep, or we have timers
4129 * that expire very soon, in which case we need to wait for a minimum
4130 * amount of time for some event loop backends.
4131 */
3865 if (ecb_expect_false (waittime < backend_mintime)) 4132 if (ecb_expect_false (waittime < backend_mintime))
4133 waittime = waittime <= EV_TS_CONST (0.)
4134 ? EV_TS_CONST (0.)
3866 waittime = backend_mintime; 4135 : backend_mintime;
3867 4136
3868 /* extra check because io_blocktime is commonly 0 */ 4137 /* extra check because io_blocktime is commonly 0 */
3869 if (ecb_expect_false (io_blocktime)) 4138 if (ecb_expect_false (io_blocktime))
3870 { 4139 {
3871 sleeptime = io_blocktime - (mn_now - prev_mn_now); 4140 sleeptime = io_blocktime - (mn_now - prev_mn_now);
… …
4206void 4475void
4207ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT 4476ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
4208{ 4477{
4209 if (ecb_expect_false (ev_is_active (w))) 4478 if (ecb_expect_false (ev_is_active (w)))
4210 return; 4479 return;
4480
4481#if EV_USE_TIMERFD
4482 if (timerfd == -2)
4483 evtimerfd_init (EV_A);
4484#endif
4211 4485
4212 if (w->reschedule_cb) 4486 if (w->reschedule_cb)
4213 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4487 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
4214 else if (w->interval) 4488 else if (w->interval)
4215 { 4489 {
… …
4957 ev_run (EV_A_ EVRUN_NOWAIT); 5231 ev_run (EV_A_ EVRUN_NOWAIT);
4958 } 5232 }
4959 } 5233 }
4960} 5234}
4961 5235
5236#if EV_FORK_ENABLE
4962static void 5237static void
4963embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 5238embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4964{ 5239{
4965 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 5240 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4966 5241
… …
4973 ev_run (EV_A_ EVRUN_NOWAIT); 5248 ev_run (EV_A_ EVRUN_NOWAIT);
4974 } 5249 }
4975 5250
4976 ev_embed_start (EV_A_ w); 5251 ev_embed_start (EV_A_ w);
4977} 5252}
5253#endif
4978 5254
4979#if 0 5255#if 0
4980static void 5256static void
4981embed_idle_cb (EV_P_ ev_idle *idle, int revents) 5257embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4982{ 5258{
… …
5003 5279
5004 ev_prepare_init (&w->prepare, embed_prepare_cb); 5280 ev_prepare_init (&w->prepare, embed_prepare_cb);
5005 ev_set_priority (&w->prepare, EV_MINPRI); 5281 ev_set_priority (&w->prepare, EV_MINPRI);
5006 ev_prepare_start (EV_A_ &w->prepare); 5282 ev_prepare_start (EV_A_ &w->prepare);
5007 5283
5284#if EV_FORK_ENABLE
5008 ev_fork_init (&w->fork, embed_fork_cb); 5285 ev_fork_init (&w->fork, embed_fork_cb);
5009 ev_fork_start (EV_A_ &w->fork); 5286 ev_fork_start (EV_A_ &w->fork);
5287#endif
5010 5288
5011 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 5289 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
5012 5290
5013 ev_start (EV_A_ (W)w, 1); 5291 ev_start (EV_A_ (W)w, 1);
5014 5292
… …
5024 5302
5025 EV_FREQUENT_CHECK; 5303 EV_FREQUENT_CHECK;
5026 5304
5027 ev_io_stop (EV_A_ &w->io); 5305 ev_io_stop (EV_A_ &w->io);
5028 ev_prepare_stop (EV_A_ &w->prepare); 5306 ev_prepare_stop (EV_A_ &w->prepare);
5307#if EV_FORK_ENABLE
5029 ev_fork_stop (EV_A_ &w->fork); 5308 ev_fork_stop (EV_A_ &w->fork);
5309#endif
5030 5310
5031 ev_stop (EV_A_ (W)w); 5311 ev_stop (EV_A_ (W)w);
5032 5312
5033 EV_FREQUENT_CHECK; 5313 EV_FREQUENT_CHECK;
5034} 5314}

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