ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.520 by root, Sat Dec 28 07:44:15 2019 UTC vs.
Revision 1.529 by root, Wed Mar 18 12:30:21 2020 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 *
… …
579#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ 579#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
580/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 580/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
581 581
582#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) */
583#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 */
584 585
585/* 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.
586 * 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,
587 * 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 */
588#define EV_TSTAMP_HUGE \ 589#define EV_TSTAMP_HUGE \
… …
603/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */ 604/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
604/* ECB.H BEGIN */ 605/* ECB.H BEGIN */
605/* 606/*
606 * libecb - http://software.schmorp.de/pkg/libecb 607 * libecb - http://software.schmorp.de/pkg/libecb
607 * 608 *
608 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de> 609 * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de>
609 * Copyright (©) 2011 Emanuele Giaquinta 610 * Copyright (©) 2011 Emanuele Giaquinta
610 * All rights reserved. 611 * All rights reserved.
611 * 612 *
612 * Redistribution and use in source and binary forms, with or without modifica- 613 * Redistribution and use in source and binary forms, with or without modifica-
613 * tion, are permitted provided that the following conditions are met: 614 * tion, are permitted provided that the following conditions are met:
… …
644 645
645#ifndef ECB_H 646#ifndef ECB_H
646#define ECB_H 647#define ECB_H
647 648
648/* 16 bits major, 16 bits minor */ 649/* 16 bits major, 16 bits minor */
649#define ECB_VERSION 0x00010006 650#define ECB_VERSION 0x00010008
650 651
651#ifdef _WIN32 652#include <string.h> /* for memcpy */
653
654#if defined (_WIN32) && !defined (__MINGW32__)
652 typedef signed char int8_t; 655 typedef signed char int8_t;
653 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;
654 typedef signed short int16_t; 659 typedef signed short int16_t;
655 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;
656 typedef signed int int32_t; 663 typedef signed int int32_t;
657 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;
658 #if __GNUC__ 667 #if __GNUC__
659 typedef signed long long int64_t; 668 typedef signed long long int64_t;
660 typedef unsigned long long uint64_t; 669 typedef unsigned long long uint64_t;
661 #else /* _MSC_VER || __BORLANDC__ */ 670 #else /* _MSC_VER || __BORLANDC__ */
662 typedef signed __int64 int64_t; 671 typedef signed __int64 int64_t;
663 typedef unsigned __int64 uint64_t; 672 typedef unsigned __int64 uint64_t;
664 #endif 673 #endif
674 typedef int64_t int_fast64_t;
675 typedef uint64_t uint_fast64_t;
665 #ifdef _WIN64 676 #ifdef _WIN64
666 #define ECB_PTRSIZE 8 677 #define ECB_PTRSIZE 8
667 typedef uint64_t uintptr_t; 678 typedef uint64_t uintptr_t;
668 typedef int64_t intptr_t; 679 typedef int64_t intptr_t;
669 #else 680 #else
… …
680 #endif 691 #endif
681#endif 692#endif
682 693
683#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) 694#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
684#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
685 704
686/* work around x32 idiocy by defining proper macros */ 705/* work around x32 idiocy by defining proper macros */
687#if ECB_GCC_AMD64 || ECB_MSVC_AMD64 706#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
688 #if _ILP32 707 #if _ILP32
689 #define ECB_AMD64_X32 1 708 #define ECB_AMD64_X32 1
… …
1196ecb_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); }
1197ecb_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); }
1198ecb_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); }
1199ecb_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); }
1200 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
1201#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))
1202 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) 1259 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1203 #define ecb_bswap16(x) __builtin_bswap16 (x) 1260 #define ecb_bswap16(x) __builtin_bswap16 (x)
1204 #else 1261 #else
1205 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) 1262 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
… …
1276ecb_inline ecb_const ecb_bool ecb_big_endian (void); 1333ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1277ecb_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; }
1278ecb_inline ecb_const ecb_bool ecb_little_endian (void); 1335ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1279ecb_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; }
1280 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
1281#if ECB_GCC_VERSION(3,0) || ECB_C99 1410#if ECB_GCC_VERSION(3,0) || ECB_C99
1282 #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))
1283#else 1412#else
1284 #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)))
1285#endif 1414#endif
… …
1308 return N; 1437 return N;
1309 } 1438 }
1310#else 1439#else
1311 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1440 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1312#endif 1441#endif
1442
1443/*****************************************************************************/
1313 1444
1314ecb_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);
1315ecb_function_ ecb_const uint32_t 1446ecb_function_ ecb_const uint32_t
1316ecb_binary16_to_binary32 (uint32_t x) 1447ecb_binary16_to_binary32 (uint32_t x)
1317{ 1448{
… …
1426 || defined __sh__ \ 1557 || defined __sh__ \
1427 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ 1558 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1428 || (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__)) \
1429 || defined __aarch64__ 1560 || defined __aarch64__
1430 #define ECB_STDFP 1 1561 #define ECB_STDFP 1
1431 #include <string.h> /* for memcpy */
1432#else 1562#else
1433 #define ECB_STDFP 0 1563 #define ECB_STDFP 0
1434#endif 1564#endif
1435 1565
1436#ifndef ECB_NO_LIBM 1566#ifndef ECB_NO_LIBM
… …
2264{ 2394{
2265 int i; 2395 int i;
2266 2396
2267 /* most backends do not modify the fdchanges list in backend_modfiy. 2397 /* most backends do not modify the fdchanges list in backend_modfiy.
2268 * except io_uring, which has fixed-size buffers which might force us 2398 * except io_uring, which has fixed-size buffers which might force us
2269 * to handle events in backend_modify, causing fdchangesd to be amended, 2399 * to handle events in backend_modify, causing fdchanges to be amended,
2270 * which could result in an endless loop. 2400 * which could result in an endless loop.
2271 * to avoid this, we do not dynamically handle fds that were added 2401 * to avoid this, we do not dynamically handle fds that were added
2272 * during fd_reify. that menas thast for those backends, fdchangecnt 2402 * during fd_reify. that means that for those backends, fdchangecnt
2273 * might be non-zero during poll, which must cause them to not block. 2403 * might be non-zero during poll, which must cause them to not block.
2274 * to not put too much of a burden on other backends, this detail 2404 * to not put too much of a burden on other backends, this detail
2275 * needs to be handled in the backend. 2405 * needs to be handled in the backend.
2276 */ 2406 */
2277 int changecnt = fdchangecnt; 2407 int changecnt = fdchangecnt;
… …
2341inline_size 2471inline_size
2342void 2472void
2343fd_change (EV_P_ int fd, int flags) 2473fd_change (EV_P_ int fd, int flags)
2344{ 2474{
2345 unsigned char reify = anfds [fd].reify; 2475 unsigned char reify = anfds [fd].reify;
2346 anfds [fd].reify |= flags; 2476 anfds [fd].reify = reify | flags;
2347 2477
2348 if (ecb_expect_true (!reify)) 2478 if (ecb_expect_true (!reify))
2349 { 2479 {
2350 ++fdchangecnt; 2480 ++fdchangecnt;
2351 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit); 2481 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
… …
2580 upheap (heap, i + HEAP0); 2710 upheap (heap, i + HEAP0);
2581} 2711}
2582 2712
2583/*****************************************************************************/ 2713/*****************************************************************************/
2584 2714
2585/* associate signal watchers to a signal signal */ 2715/* associate signal watchers to a signal */
2586typedef struct 2716typedef struct
2587{ 2717{
2588 EV_ATOMIC_T pending; 2718 EV_ATOMIC_T pending;
2589#if EV_MULTIPLICITY 2719#if EV_MULTIPLICITY
2590 EV_P; 2720 EV_P;
… …
2903static void 3033static void
2904timerfdcb (EV_P_ ev_io *iow, int revents) 3034timerfdcb (EV_P_ ev_io *iow, int revents)
2905{ 3035{
2906 struct itimerspec its = { 0 }; 3036 struct itimerspec its = { 0 };
2907 3037
2908 /* since we can't easily come zup with a (portable) maximum value of time_t, 3038 its.it_value.tv_sec = ev_rt_now + (int)MAX_BLOCKTIME2;
2909 * we wake up once per month, which hopefully is rare enough to not
2910 * be a problem. */
2911 its.it_value.tv_sec = ev_rt_now + 86400 * 30;
2912 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0); 3039 timerfd_settime (timerfd, TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET, &its, 0);
2913 3040
2914 ev_rt_now = ev_time (); 3041 ev_rt_now = ev_time ();
2915 /* periodics_reschedule only needs ev_rt_now */ 3042 /* periodics_reschedule only needs ev_rt_now */
2916 /* but maybe in the future we want the full treatment. */ 3043 /* but maybe in the future we want the full treatment. */
2917 /* 3044 /*
2918 now_floor = EV_TS_CONST (0.); 3045 now_floor = EV_TS_CONST (0.);
2919 time_update (EV_A_ EV_TSTAMP_HUGE); 3046 time_update (EV_A_ EV_TSTAMP_HUGE);
2920 */ 3047 */
3048#if EV_PERIODIC_ENABLE
2921 periodics_reschedule (EV_A); 3049 periodics_reschedule (EV_A);
3050#endif
2922} 3051}
2923 3052
2924ecb_noinline ecb_cold 3053ecb_noinline ecb_cold
2925static void 3054static void
2926evtimerfd_init (EV_P) 3055evtimerfd_init (EV_P)
… …
3048 3177
3049ecb_cold 3178ecb_cold
3050unsigned int 3179unsigned int
3051ev_embeddable_backends (void) EV_NOEXCEPT 3180ev_embeddable_backends (void) EV_NOEXCEPT
3052{ 3181{
3053 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 3182 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT | EVBACKEND_IOURING;
3054 3183
3055 /* 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 */
3056 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 */
3057 flags &= ~EVBACKEND_EPOLL; 3186 flags &= ~EVBACKEND_EPOLL;
3058 3187
3059 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */ 3188 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
3060
3061 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
3062 * because our backend_fd is the epoll fd we need as fallback.
3063 * if the kernel ever is fixed, this might change...
3064 */
3065 3189
3066 return flags; 3190 return flags;
3067} 3191}
3068 3192
3069unsigned int 3193unsigned int
… …
3968 4092
3969 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)))
3970 { 4094 {
3971 waittime = EV_TS_CONST (MAX_BLOCKTIME); 4095 waittime = EV_TS_CONST (MAX_BLOCKTIME);
3972 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
3973 if (timercnt) 4109 if (timercnt)
3974 { 4110 {
3975 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; 4111 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3976 if (waittime > to) waittime = to; 4112 if (waittime > to) waittime = to;
3977 } 4113 }

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines