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