*** empty log message ***

2 files changed, 302 insertions, 16 deletions

diff --git a/ev.c b/ev.c
index 1470c6b..a8ae730 100644
--- a/ev.c
+++ b/ev.c
@@ -466,12 +466,61 @@ struct signalfd_siginfo
 #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.
@@ -484,26 +533,27 @@ struct signalfd_siginfo
   #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
@@ -520,14 +570,23 @@ struct signalfd_siginfo
     #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)
@@ -535,6 +594,37 @@ struct signalfd_siginfo
   #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)
@@ -547,6 +637,13 @@ struct signalfd_siginfo
   #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__))
@@ -568,7 +665,188 @@ struct signalfd_siginfo
 /* 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)
diff --git a/update_ev_c b/update_ev_c
new file mode 100755
index 0000000..4541753
--- /dev/null
+++ b/update_ev_c
@@ -0,0 +1,8 @@
+#!/bin/sh -e
+
+(
+   sed -ne '1,\%/\* ECB.H BEGIN \*/%p' ev.c
+   cat ecb.h
+   sed -ne '\%/\* ECB.H END \*/%,$p' ev.c
+) >ev.c~ && mv ev.c~ ev.c
+