mirror of /home/gitosis/repositories/libev.git
*** empty log message ***
This commit is contained in:
Marc Alexander Lehmann
parent
5b47c3ba16
commit
03bf9eca6e
310
ev.c
310
ev.c
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@ -466,12 +466,61 @@ struct signalfd_siginfo
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#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
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#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
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/* the following are taken from libecb */
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/* ecb.h start */
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/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
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/* ECB.H BEGIN */
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/*
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* libecb - http://software.schmorp.de/pkg/libecb
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*
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* Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
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* Copyright (©) 2011 Emanuele Giaquinta
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modifica-
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* tion, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ECB_H
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#define ECB_H
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#ifdef _WIN32
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typedef signed char int8_t;
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typedef unsigned char uint8_t;
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typedef signed short int16_t;
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typedef unsigned short uint16_t;
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typedef signed int int32_t;
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typedef unsigned int uint32_t;
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#if __GNUC__
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typedef signed long long int64_t;
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typedef unsigned long long uint64_t;
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#else /* _MSC_VER || __BORLANDC__ */
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typedef signed __int64 int64_t;
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typedef unsigned __int64 uint64_t;
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#endif
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#else
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#include <inttypes.h>
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#endif
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/* many compilers define _GNUC_ to some versions but then only implement
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* what their idiot authors think are the "more important" extensions,
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* causing enourmous grief in return for some better fake benchmark numbers.
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* causing enormous grief in return for some better fake benchmark numbers.
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* or so.
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* we try to detect these and simply assume they are not gcc - if they have
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* an issue with that they should have done it right in the first place.
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@ -484,26 +533,27 @@ struct signalfd_siginfo
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#endif
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#endif
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#if __cplusplus
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#define ecb_inline static inline
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#elif ECB_GCC_VERSION(2,5)
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#define ecb_inline static __inline__
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#elif ECB_C99
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#define ecb_inline static inline
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#else
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#define ecb_inline static
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/*****************************************************************************/
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/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
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/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
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#if ECB_NO_THREADS || ECB_NO_SMP
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#define ECB_MEMORY_FENCE do { } while (0)
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#define ECB_MEMORY_FENCE_ACQUIRE do { } while (0)
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#define ECB_MEMORY_FENCE_RELEASE do { } while (0)
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#endif
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#ifndef ECB_MEMORY_FENCE
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#if ECB_GCC_VERSION(2,5)
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#if __x86
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#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
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#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
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#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
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#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
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#define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
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#elif __amd64
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#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
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#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
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#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
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#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
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#endif
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#endif
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#endif
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@ -520,14 +570,23 @@ struct signalfd_siginfo
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#define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
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#elif defined(_WIN32)
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#include <WinNT.h>
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#define ECB_MEMORY_FENCE MemoryBarrier ()
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#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
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#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
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#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
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#endif
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#endif
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#ifndef ECB_MEMORY_FENCE
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/*
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* if you get undefined symbol references to pthread_mutex_lock,
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* or failure to find pthread.h, then you should implement
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* the ECB_MEMORY_FENCE operations for your cpu/compiler
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* OR provide pthread.h and link against the posix thread library
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* of your system.
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*/
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#include <pthread.h>
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#define ECB_NEEDS_PTHREADS 1
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#define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
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static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
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#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
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@ -535,6 +594,37 @@ struct signalfd_siginfo
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#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
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#endif
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/*****************************************************************************/
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#define ECB_C99 (__STDC_VERSION__ >= 199901L)
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#if __cplusplus
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#define ecb_inline static inline
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#elif ECB_GCC_VERSION(2,5)
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#define ecb_inline static __inline__
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#elif ECB_C99
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#define ecb_inline static inline
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#else
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#define ecb_inline static
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#endif
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#if ECB_GCC_VERSION(3,3)
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#define ecb_restrict __restrict__
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#elif ECB_C99
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#define ecb_restrict restrict
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#else
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#define ecb_restrict
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#endif
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typedef int ecb_bool;
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#define ECB_CONCAT_(a, b) a ## b
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#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
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#define ECB_STRINGIFY_(a) # a
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#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
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#define ecb_function_ ecb_inline
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#if ECB_GCC_VERSION(3,1)
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#define ecb_attribute(attrlist) __attribute__(attrlist)
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#define ecb_is_constant(expr) __builtin_constant_p (expr)
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@ -547,6 +637,13 @@ struct signalfd_siginfo
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#define ecb_prefetch(addr,rw,locality)
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#endif
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/* no emulation for ecb_decltype */
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#if ECB_GCC_VERSION(4,5)
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#define ecb_decltype(x) __decltype(x)
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#elif ECB_GCC_VERSION(3,0)
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#define ecb_decltype(x) __typeof(x)
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#endif
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#define ecb_noinline ecb_attribute ((__noinline__))
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#define ecb_noreturn ecb_attribute ((__noreturn__))
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#define ecb_unused ecb_attribute ((__unused__))
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@ -568,7 +665,188 @@ struct signalfd_siginfo
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/* booleans, not the expression. */
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#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
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#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
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/* ecb.h end */
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/* for compatibility to the rest of the world */
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#define ecb_likely(expr) ecb_expect_true (expr)
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#define ecb_unlikely(expr) ecb_expect_false (expr)
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/* count trailing zero bits and count # of one bits */
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#if ECB_GCC_VERSION(3,4)
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/* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
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#define ecb_ld32(x) (__builtin_clz (x) ^ 31)
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#define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
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#define ecb_ctz32(x) __builtin_ctz (x)
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#define ecb_ctz64(x) __builtin_ctzll (x)
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#define ecb_popcount32(x) __builtin_popcount (x)
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/* no popcountll */
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#else
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ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
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ecb_function_ int
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ecb_ctz32 (uint32_t x)
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{
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int r = 0;
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x &= ~x + 1; /* this isolates the lowest bit */
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#if ECB_branchless_on_i386
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r += !!(x & 0xaaaaaaaa) << 0;
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r += !!(x & 0xcccccccc) << 1;
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r += !!(x & 0xf0f0f0f0) << 2;
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r += !!(x & 0xff00ff00) << 3;
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r += !!(x & 0xffff0000) << 4;
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#else
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if (x & 0xaaaaaaaa) r += 1;
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if (x & 0xcccccccc) r += 2;
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if (x & 0xf0f0f0f0) r += 4;
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if (x & 0xff00ff00) r += 8;
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if (x & 0xffff0000) r += 16;
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#endif
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return r;
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}
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ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
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ecb_function_ int
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ecb_ctz64 (uint64_t x)
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{
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int shift = x & 0xffffffffU ? 0 : 32;
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return ecb_ctz32 (x >> shift) + shift;
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}
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ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
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ecb_function_ int
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ecb_popcount32 (uint32_t x)
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{
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x -= (x >> 1) & 0x55555555;
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x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
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x = ((x >> 4) + x) & 0x0f0f0f0f;
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x *= 0x01010101;
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return x >> 24;
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}
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ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
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ecb_function_ int ecb_ld32 (uint32_t x)
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{
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int r = 0;
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if (x >> 16) { x >>= 16; r += 16; }
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if (x >> 8) { x >>= 8; r += 8; }
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if (x >> 4) { x >>= 4; r += 4; }
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if (x >> 2) { x >>= 2; r += 2; }
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if (x >> 1) { r += 1; }
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return r;
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}
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ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
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ecb_function_ int ecb_ld64 (uint64_t x)
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{
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int r = 0;
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if (x >> 32) { x >>= 32; r += 32; }
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return r + ecb_ld32 (x);
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}
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#endif
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/* popcount64 is only available on 64 bit cpus as gcc builtin */
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/* so for this version we are lazy */
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ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
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ecb_function_ int
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ecb_popcount64 (uint64_t x)
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{
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return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
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}
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ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
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ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
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ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
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ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
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ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
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ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
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ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
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ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
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ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
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ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
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ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
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ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
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ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
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ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
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ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
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ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
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#if ECB_GCC_VERSION(4,3)
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#define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
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#define ecb_bswap32(x) __builtin_bswap32 (x)
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#define ecb_bswap64(x) __builtin_bswap64 (x)
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#else
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ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
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ecb_function_ uint16_t
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ecb_bswap16 (uint16_t x)
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{
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return ecb_rotl16 (x, 8);
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}
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ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
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ecb_function_ uint32_t
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ecb_bswap32 (uint32_t x)
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{
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return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
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}
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ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
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ecb_function_ uint64_t
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ecb_bswap64 (uint64_t x)
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{
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return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
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}
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#endif
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#if ECB_GCC_VERSION(4,5)
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#define ecb_unreachable() __builtin_unreachable ()
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#else
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/* this seems to work fine, but gcc always emits a warning for it :/ */
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ecb_function_ void ecb_unreachable (void) ecb_noreturn;
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ecb_function_ void ecb_unreachable (void) { }
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#endif
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/* try to tell the compiler that some condition is definitely true */
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#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
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ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
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ecb_function_ unsigned char
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ecb_byteorder_helper (void)
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{
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const uint32_t u = 0x11223344;
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return *(unsigned char *)&u;
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}
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ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
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ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
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ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
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ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
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#if ECB_GCC_VERSION(3,0) || ECB_C99
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#define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
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#else
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#define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
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#endif
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#if ecb_cplusplus_does_not_suck
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/* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
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template<typename T, int N>
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static inline int ecb_array_length (const T (&arr)[N])
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{
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return N;
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}
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#else
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#define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
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#endif
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#endif
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/* ECB.H END */
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#define expect_false(cond) ecb_expect_false (cond)
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#define expect_true(cond) ecb_expect_true (cond)
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@ -0,0 +1,8 @@
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#!/bin/sh -e
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(
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sed -ne '1,\%/\* ECB.H BEGIN \*/%p' ev.c
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cat ecb.h
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sed -ne '\%/\* ECB.H END \*/%,$p' ev.c
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) >ev.c~ && mv ev.c~ ev.c
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