[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.394 by root, Thu Aug 4 14:49:27 2011 UTC vs.
Revision 1.413 by root, Fri Mar 23 19:06:08 2012 UTC

 # include EV_H
 #else
 # include "ev.h"
 #endif
-EV_CPP(extern "C" {)
+#if EV_NO_THREADS
+# undef EV_NO_SMP
+# define EV_NO_SMP 1
+# undef ECB_NO_THREADS
+# define ECB_NO_THREADS 1
+#endif
+#if EV_NO_SMP
+# undef EV_NO_SMP
+# define ECB_NO_SMP 1
+#endif
 #ifndef _WIN32
 # include <sys/time.h>
 # include <sys/wait.h>
 # include <unistd.h>
 /* 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 (©) 2009-2012 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:
 /*****************************************************************************/
 /* 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
+# define ECB_NO_SMP 1
+#endif
 #if ECB_NO_THREADS || ECB_NO_SMP
   #define ECB_MEMORY_FENCE do { } while (0)
 #endif
 #ifndef ECB_MEMORY_FENCE
-  #if ECB_GCC_VERSION(2,5)
+  #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
-    #if __x86
+    #if __i386 || __i386__
       #define ECB_MEMORY_FENCE         __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
       #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
+    #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
       #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") /* play safe - not needed in any current cpu */
     #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
       #define ECB_MEMORY_FENCE         __asm__ __volatile__ ("sync" : : : "memory")
        || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
       #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
     #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
        || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
       #define ECB_MEMORY_FENCE         __asm__ __volatile__ ("dmb" : : : "memory")
+    #elif __sparc || __sparc__
+      #define ECB_MEMORY_FENCE         __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
+      #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad"                               : : : "memory")
+      #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore |             #StoreStore")
+    #elif defined(__s390__) || defined(__s390x__)
+      #define ECB_MEMORY_FENCE         __asm__ __volatile__ ("bcr 15,0" : : : "memory")
+    #elif defined(__mips__)
+      #define ECB_MEMORY_FENCE         __asm__ __volatile__ ("sync" : : : "memory")
     #endif
   #endif
 #endif
 #ifndef ECB_MEMORY_FENCE
-  #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER)
+  #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
     #define ECB_MEMORY_FENCE         __sync_synchronize ()
     /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
     /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release      (&dummy   ); }) */
   #elif _MSC_VER >= 1400 /* VC++ 2005 */
     #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
     #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
     #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
   #elif defined(_WIN32)
     #include <WinNT.h>
     #define ECB_MEMORY_FENCE         MemoryBarrier () /* actually just xchg on x86... scary */
+  #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
+    #include <mbarrier.h>
+    #define ECB_MEMORY_FENCE         __machine_rw_barrier ()
+    #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier  ()
+    #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier  ()
+  #elif __xlC__
+    #define ECB_MEMORY_FENCE         __lwsync ()
   #endif
 #endif
 #ifndef ECB_MEMORY_FENCE
   #if !ECB_AVOID_PTHREADS
     return r + ecb_ld32 (x);
   }
 #endif
+ecb_function_ uint8_t  ecb_bitrev8  (uint8_t  x) ecb_const;
+ecb_function_ uint8_t  ecb_bitrev8  (uint8_t  x)
+{
+  return (  (x * 0x0802U & 0x22110U)
+          | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
+}
+ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
+ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
+{
+  x = ((x >>  1) &     0x5555) | ((x &     0x5555) <<  1);
+  x = ((x >>  2) &     0x3333) | ((x &     0x3333) <<  2);
+  x = ((x >>  4) &     0x0f0f) | ((x &     0x0f0f) <<  4);
+  x = ( x >>  8              ) | ( x               <<  8);
+  return x;
+}
+ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
+ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
+{
+  x = ((x >>  1) & 0x55555555) | ((x & 0x55555555) <<  1);
+  x = ((x >>  2) & 0x33333333) | ((x & 0x33333333) <<  2);
+  x = ((x >>  4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) <<  4);
+  x = ((x >>  8) & 0x00ff00ff) | ((x & 0x00ff00ff) <<  8);
+  x = ( x >> 16              ) | ( x               << 16);
+  return x;
+}
 /* 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)
 #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_inline void ecb_unreachable (void) ecb_noreturn;
-  ecb_function_ void ecb_unreachable (void) { }
+  ecb_inline 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_inline unsigned char ecb_byteorder_helper (void) ecb_const;
-ecb_function_ unsigned char
+ecb_inline 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_inline ecb_bool ecb_big_endian    (void) ecb_const;
-ecb_function_ ecb_bool ecb_big_endian    (void) { return ecb_byteorder_helper () == 0x11; }
+ecb_inline ecb_bool ecb_big_endian    (void) { return ecb_byteorder_helper () == 0x11; }
-ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
+ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
-ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
+ecb_inline 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 __cplusplus
+  template<typename T>
+  static inline T ecb_div_rd (T val, T div)
+  {
+    return val < 0 ? - ((-val + div - 1) / div) : (val          ) / div;
+  }
+  template<typename T>
+  static inline T ecb_div_ru (T val, T div)
+  {
+    return val < 0 ? - ((-val          ) / div) : (val + div - 1) / div;
+  }
+#else
+  #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val)            ) / (div))
+  #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val)            ) / (div)) : ((val) + (div) - 1) / (div))
 #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>
 #endif
 /* ECB.H END */
 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
+/* if your architecture doesn't need memory fences, e.g. because it is
+ * single-cpu/core, or if you use libev in a project that doesn't use libev
+ * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
+ * libev, in which cases the memory fences become nops.
+ * alternatively, you can remove this #error and link against libpthread,
+ * which will then provide the memory fences.
+ */
+# error "memory fences not defined for your architecture, please report"
+#endif
-# undef ECB_MEMORY_FENCE
+#ifndef ECB_MEMORY_FENCE
-# undef ECB_MEMORY_FENCE_ACQUIRE
+# define ECB_MEMORY_FENCE do { } while (0)
-# undef ECB_MEMORY_FENCE_RELEASE
+# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
+# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
 #endif
 #define expect_false(cond) ecb_expect_false (cond)
 #define expect_true(cond)  ecb_expect_true  (cond)
 #define noinline           ecb_noinline
     #undef VAR
   };
   #include "ev_wrap.h"
   static struct ev_loop default_loop_struct;
-  struct ev_loop *ev_default_loop_ptr;
+  EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
 #else
-  ev_tstamp ev_rt_now;
+  EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
   #define VAR(name,decl) static decl;
     #include "ev_vars.h"
   #undef VAR
   static int ev_default_loop_ptr;
   do
     ncur <<= 1;
   while (cnt > ncur);
-  /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
+  /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
   if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
     {
       ncur *= elem;
       ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
       ncur = ncur - sizeof (void *) * 4;
           /* win32 people keep sending patches that change this write() to send() */
           /* and then run away. but send() is wrong, it wants a socket handle on win32 */
           /* so when you think this write should be a send instead, please find out */
           /* where your send() is from - it's definitely not the microsoft send, and */
           /* tell me. thank you. */
+          /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
+          /* check the ev documentation on how to use this flag */
           write (evpipe [1], &(evpipe [1]), 1);
         }
       errno = old_errno;
     }
 #endif
         assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
         backend_poll (EV_A_ waittime);
         assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
-        pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
+        pipe_write_wanted = 0; /* just an optimisation, no fence needed */
         if (pipe_write_skipped)
           {
             assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
             ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
 void noinline
 ev_timer_again (EV_P_ ev_timer *w)
 {
   EV_FREQUENT_CHECK;
+  clear_pending (EV_A_ (W)w);
   if (ev_is_active (w))
     {
       if (w->repeat)
         {
 #if EV_MULTIPLICITY
   #include "ev_wrap.h"
 #endif
-EV_CPP(})

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Comparing libev/ev.c (file contents): Revision 1.394 by root, Thu Aug 4 14:49:27 2011 UTC vs. Revision 1.413 by root, Fri Mar 23 19:06:08 2012 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.394 by root, Thu Aug 4 14:49:27 2011 UTC vs.
Revision 1.413 by root, Fri Mar 23 19:06:08 2012 UTC