first rough cut at c++ interface

[software/libev.git] / ev_select.c

diff --git a/ev_select.c b/ev_select.c
index 0dfa3128acff8577266448e5ee2cf4ba9b46cbb7..7fe9084c4b34a4d2792854434fe8818559d6a7a5 100644 (file)
--- a/ev_select.c
+++ b/ev_select.c
@@ -1,4 +1,6 @@
 /*
 /*

+ * libev select fd activity backend
+ *

  * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *
  * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *


@@ -27,103 +29,201 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 

-/* for broken bsd's */
-#include <sys/time.h>
-#include <sys/types.h>
-#include <unistd.h>
-

 /* for unix systems */
 /* for unix systems */

-#include <sys/select.h>
+#if WIN32
+typedef unsigned int uint32_t;
+# ifndef EV_SELECT_USE_FD_SET
+#  define EV_SELECT_USE_FD_SET 1
+# endif
+#else
+# include <sys/select.h>
+# include <inttypes.h>
+#endif
+
+#if EV_SELECT_USE_WIN32_HANDLES
+# undef EV_SELECT_USE_FD_SET
+# define EV_SELECT_USE_FD_SET 1
+#endif

 
 #include <string.h>
 
 #include <string.h>

-#include <inttypes.h>
-
-static unsigned char *vec_ri, *vec_ro, *vec_wi, *vec_wo;
-static int vec_max;

 
 static void
 
 static void

-select_modify (int fd, int oev, int nev)
+select_modify (EV_P_ int fd, int oev, int nev)

 {
 {

-  int offs = fd >> 3;
-  int mask = 1 << (fd & 7);
-
-  if (vec_max < (fd >> 5) + 1)
-    {
-      int new_max = (fd >> 5) + 1;
-
-      vec_ri = (unsigned char *)realloc (vec_ri, new_max * 4);
-      vec_ro = (unsigned char *)realloc (vec_ro, new_max * 4); /* could free/malloc */
-      vec_wi = (unsigned char *)realloc (vec_wi, new_max * 4);
-      vec_wo = (unsigned char *)realloc (vec_wo, new_max * 4); /* could free/malloc */
-
-      for (; vec_max < new_max; ++vec_max)
-        ((uint32_t *)vec_ri)[vec_max] =
-        ((uint32_t *)vec_wi)[vec_max] = 0;
-    }
-
-  vec_ri [offs] |= mask;
-  if (!(nev & EV_READ))
-    vec_ri [offs] &= ~mask;
-
-  vec_wi [offs] |= mask;
-  if (!(nev & EV_WRITE))
-    vec_wi [offs] &= ~mask;
+  if (oev == nev)
+    return;
+
+#if EV_SELECT_USE_FD_SET
+# if EV_SELECT_USE_WIN32_HANDLES
+  fd = _get_osfhandle (fd);
+  if (fd < 0)
+    return;
+# endif
+
+  if (nev & EV_READ)
+    FD_SET (fd, (struct fd_set *)vec_ri);
+  else
+    FD_CLR (fd, (struct fd_set *)vec_ri);
+
+  if (nev & EV_WRITE)
+    FD_SET (fd, (struct fd_set *)vec_wi);
+  else
+    FD_CLR (fd, (struct fd_set *)vec_wi);
+#else
+  {
+    int offs = fd >> 3;
+    int mask = 1 << (fd & 7);
+
+    if (vec_max < (fd >> 5) + 1)
+      {
+        int new_max = (fd >> 5) + 1;
+
+        vec_ri = (unsigned char *)ev_realloc (vec_ri, new_max * 4);
+        vec_ro = (unsigned char *)ev_realloc (vec_ro, new_max * 4); /* could free/malloc */
+        vec_wi = (unsigned char *)ev_realloc (vec_wi, new_max * 4);
+        vec_wo = (unsigned char *)ev_realloc (vec_wo, new_max * 4); /* could free/malloc */
+
+        for (; vec_max < new_max; ++vec_max)
+          ((uint32_t *)vec_ri)[vec_max] =
+          ((uint32_t *)vec_wi)[vec_max] = 0;
+      }
+
+    vec_ri [offs] |= mask;
+    if (!(nev & EV_READ))
+      vec_ri [offs] &= ~mask;
+
+    vec_wi [offs] |= mask;
+    if (!(nev & EV_WRITE))
+      vec_wi [offs] &= ~mask;
+  }
+#endif

 }
 
 static void
 }
 
 static void

-select_poll (ev_tstamp timeout)
+select_poll (EV_P_ ev_tstamp timeout)

 {
 {

+  int word, offs;

   struct timeval tv;
   int res;
 
   struct timeval tv;
   int res;
 

+#if EV_SELECT_USE_FD_SET
+  memcpy (vec_ro, vec_ri, sizeof (struct fd_set));
+  memcpy (vec_wo, vec_wi, sizeof (struct fd_set));
+#else

   memcpy (vec_ro, vec_ri, vec_max * 4);
   memcpy (vec_wo, vec_wi, vec_max * 4);
   memcpy (vec_ro, vec_ri, vec_max * 4);
   memcpy (vec_wo, vec_wi, vec_max * 4);

+#endif

 
   tv.tv_sec  = (long)timeout;
   tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6);
 
   res = select (vec_max * 32, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
 
 
   tv.tv_sec  = (long)timeout;
   tv.tv_usec = (long)((timeout - (ev_tstamp)tv.tv_sec) * 1e6);
 
   res = select (vec_max * 32, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
 

-  if (res > 0)
+  if (res < 0)

     {
     {

-      int word, offs;
+#ifdef WIN32
+      if (errno == WSAEINTR   ) errno = EINTR;
+      if (errno == WSAENOTSOCK) errno = EBADF;
+#endif
+
+      if (errno == EBADF)
+        fd_ebadf (EV_A);
+      else if (errno == ENOMEM && !syserr_cb)
+        fd_enomem (EV_A);
+      else if (errno != EINTR)
+        syserr ("(libev) select");

 
 

-      for (word = vec_max; word--; )
+      return;
+    }
+
+#if EV_SELECT_USE_FD_SET
+# if EV_SELECT_USE_WIN32_HANDLES
+  for (word = 0; word < anfdmax; ++word)
+    {
+      if (!anfd [word].events)

         {
         {

-          if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word])
-            for (offs = 4; offs--; )
-              {
-                int idx = word * 4 + offs;
-                unsigned char byte_r = vec_ro [idx];
-                unsigned char byte_w = vec_wo [idx];
-                int bit;
-
-                if (byte_r | byte_w)
-                  for (bit = 8; bit--; )
-                    {
-                      int events = 0;
-                      events |= byte_r & (1 << bit) ? EV_READ  : 0;
-                      events |= byte_w & (1 << bit) ? EV_WRITE : 0;
-
-                      if (events)
-                        fd_event (idx * 8 + bit, events);
-                    }
-              }
+          int fd = _get_osfhandle (word);
+
+          if (fd >= 0)
+            {
+              int events = 0;
+
+              if (FD_ISSET (fd, (struct fd_set *)vec_ro)) events |= EV_READ;
+              if (FD_ISSET (fd, (struct fd_set *)vec_wo)) events |= EV_WRITE;
+
+              if (events)
+                fd_event (EV_A_ word, events);
+            }

         }
     }
         }
     }

-  else if (res < 0)
+# else
+  for (word = 0; word < FD_SETSIZE; ++word)

     {
     {

-      if (errno == EBADF)
-        fd_recheck ();
+      int events = 0;
+      if (FD_ISSET (word, (struct fd_set *)vec_ro)) events |= EV_READ;
+      if (FD_ISSET (word, (struct fd_set *)vec_wo)) events |= EV_WRITE;
+
+      if (events)
+        fd_event (EV_A_ word, events);
+    }
+# endif
+#else
+  for (word = vec_max; word--; )
+    {
+      if (((uint32_t *)vec_ro) [word] | ((uint32_t *)vec_wo) [word])
+        for (offs = 4; offs--; )
+          {
+            int idx = word * 4 + offs;
+            unsigned char byte_r = vec_ro [idx];
+            unsigned char byte_w = vec_wo [idx];
+            int bit;
+
+            if (byte_r | byte_w)
+              for (bit = 8; bit--; )
+                {
+                  int events = 0;
+                  events |= byte_r & (1 << bit) ? EV_READ  : 0;
+                  events |= byte_w & (1 << bit) ? EV_WRITE : 0;
+
+                  if (events)
+                    fd_event (EV_A_ idx * 8 + bit, events);
+                }
+          }

     }
     }

+#endif

 }
 
 }
 

-static void
-select_init (int flags)
+static int
+select_init (EV_P_ int flags)

 {
 {

-  ev_method     = EVMETHOD_SELECT;

   method_fudge  = 1e-2; /* needed to compensate for select returning early, very conservative */
   method_modify = select_modify;
   method_poll   = select_poll;
   method_fudge  = 1e-2; /* needed to compensate for select returning early, very conservative */
   method_modify = select_modify;
   method_poll   = select_poll;

+
+#if EV_SELECT_USE_FD_SET
+  vec_max = FD_SETSIZE / 32;
+  vec_ri  = ev_malloc (sizeof (struct fd_set)); FD_ZERO ((struct fd_set *)vec_ri);
+  vec_ro  = ev_malloc (sizeof (struct fd_set));
+  vec_wi  = ev_malloc (sizeof (struct fd_set)); FD_ZERO ((struct fd_set *)vec_wi);
+  vec_wo  = ev_malloc (sizeof (struct fd_set));
+#else
+  vec_max = 0;
+  vec_ri  = 0; 
+  vec_ri  = 0;   
+  vec_wo  = 0; 
+  vec_wo  = 0; 
+#endif
+
+  return EVMETHOD_SELECT;

 }
 
 }
 

+static void
+select_destroy (EV_P)
+{
+  ev_free (vec_ri);
+  ev_free (vec_ro);
+  ev_free (vec_wi);
+  ev_free (vec_wo);
+}
+
+