X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=lib%2Fmemcached_io.c;h=2c1bb14c3860df761f6011fe799bb9ebdf0d6793;hb=80f385f689fd04194182c1b202e576ad065626a9;hp=54844be445956547705d779bc1eb30934a4b0f1d;hpb=c9f472b091b351b206d34b9fa37e28b6d1e4202c;p=awesomized%2Flibmemcached

diff --git a/lib/memcached_io.c b/lib/memcached_io.c
index 54844be4..2c1bb14c 100644
--- a/lib/memcached_io.c
+++ b/lib/memcached_io.c
@@ -7,12 +7,22 @@
 #include <sys/select.h>
 #include <poll.h>
 
-static int io_wait(memcached_st *ptr, unsigned int server_key, unsigned read_or_write)
+typedef enum {
+  MEM_READ,
+  MEM_WRITE,
+} memc_read_or_write;
+
+static ssize_t io_flush(memcached_st *ptr, unsigned int server_key, 
+                                  memcached_return *error);
+
+static memcached_return io_wait(memcached_st *ptr, unsigned int server_key, 
+                                memc_read_or_write read_or_write)
 {
   struct pollfd fds[1];
   short flags= 0;
+  int error;
 
-  if (read_or_write)
+  if (read_or_write == MEM_WRITE) /* write */
     flags= POLLOUT |  POLLERR;
   else
     flags= POLLIN | POLLERR;
@@ -21,10 +31,21 @@ static int io_wait(memcached_st *ptr, unsigned int server_key, unsigned read_or_
   fds[0].fd= ptr->hosts[server_key].fd;
   fds[0].events= flags;
 
-  if (poll(fds, 1, -1) < 0)
-    return MEMCACHED_FAILURE;
+  error= poll(fds, 1, ptr->poll_timeout);
+
+  if (error == 1)
+    return MEMCACHED_SUCCESS;
+  else if (error == 0)
+  {
+    return MEMCACHED_TIMEOUT;
+  }
+
+  WATCHPOINT;
+  /* Imposssible for anything other then -1 */
+  WATCHPOINT_ASSERT(error == -1);
+  memcached_quit_server(ptr, server_key, 1);
+  return MEMCACHED_FAILURE;
 
-  return MEMCACHED_SUCCESS;
 }
 
 ssize_t memcached_io_read(memcached_st *ptr, unsigned  int server_key,
@@ -36,32 +57,33 @@ ssize_t memcached_io_read(memcached_st *ptr, unsigned  int server_key,
 
   while (length)
   {
-    if (!ptr->read_buffer_length)
+    if (!ptr->hosts[server_key].read_buffer_length)
     {
       size_t data_read;
 
       while (1)
       {
-        if (ptr->flags & MEM_NO_BLOCK)
-        {
-          memcached_return rc;
-
-          rc= io_wait(ptr, server_key, 0);
-          if (rc != MEMCACHED_SUCCESS)
-            return -1;
-        }
-
         data_read= read(ptr->hosts[server_key].fd, 
-                        ptr->read_buffer, 
+                        ptr->hosts[server_key].read_buffer, 
                         MEMCACHED_MAX_BUFFER);
         if (data_read == -1)
         {
           switch (errno)
           {
           case EAGAIN:
-            break;
+            {
+              memcached_return rc;
+              rc= io_wait(ptr, server_key, MEM_READ);
+
+              if (rc == MEMCACHED_SUCCESS)
+                continue;
+
+              memcached_quit_server(ptr, server_key, 1);
+              return -1;
+            }
           default:
             {
+              memcached_quit_server(ptr, server_key, 1);
               ptr->cached_errno= errno;
               return -1;
             }
@@ -72,14 +94,14 @@ ssize_t memcached_io_read(memcached_st *ptr, unsigned  int server_key,
         /* If zero, just keep looping */
       }
 
-      ptr->read_buffer_length= data_read;
-      ptr->read_ptr= ptr->read_buffer;
+      ptr->hosts[server_key].read_buffer_length= data_read;
+      ptr->hosts[server_key].read_ptr= ptr->hosts[server_key].read_buffer;
     }
 
-    *buffer_ptr= *ptr->read_ptr;
+    *buffer_ptr= *ptr->hosts[server_key].read_ptr;
     length--;
-    ptr->read_ptr++;
-    ptr->read_buffer_length--;
+    ptr->hosts[server_key].read_ptr++;
+    ptr->hosts[server_key].read_buffer_length--;
     buffer_ptr++;
   }
 
@@ -93,71 +115,95 @@ ssize_t memcached_io_write(memcached_st *ptr, unsigned int server_key,
 
   for (x= 0; x < length; x++)
   {
-    ptr->write_buffer[ptr->write_buffer_offset]= buffer[x];
-    ptr->write_buffer_offset++;
-
-    if (ptr->write_buffer_offset == MEMCACHED_MAX_BUFFER)
+    if (ptr->hosts[server_key].write_ptr == 0)
+      ptr->hosts[server_key].write_ptr= ptr->hosts[server_key].write_buffer;
+    WATCHPOINT_ASSERT(ptr->hosts[server_key].write_ptr);
+    *ptr->hosts[server_key].write_ptr= buffer[x];
+    ptr->hosts[server_key].write_ptr++;
+    ptr->hosts[server_key].write_buffer_offset++;
+
+    if (ptr->hosts[server_key].write_buffer_offset == MEMCACHED_MAX_BUFFER)
     {
+      memcached_return rc;
       size_t sent_length;
 
-      sent_length= memcached_io_flush(ptr, server_key);
+      sent_length= io_flush(ptr, server_key, &rc);
+      if (sent_length == -1)
+        return -1;
 
       WATCHPOINT_ASSERT(sent_length == MEMCACHED_MAX_BUFFER);
-      ptr->write_buffer_offset= 0;
+      ptr->hosts[server_key].write_ptr= ptr->hosts[server_key].write_buffer;
+      ptr->hosts[server_key].write_buffer_offset= 0;
     }
   }
 
   if (with_flush)
   {
-    if (memcached_io_flush(ptr, server_key) == -1)
+    memcached_return rc;
+    if (io_flush(ptr, server_key, &rc) == -1)
       return -1;
   }
 
   return length;
 }
 
-ssize_t memcached_io_flush(memcached_st *ptr, unsigned int server_key)
+memcached_return memcached_io_close(memcached_st *ptr, unsigned int server_key)
+{
+  close(ptr->hosts[server_key].fd);
+
+  return MEMCACHED_SUCCESS;
+}
+
+static ssize_t io_flush(memcached_st *ptr, unsigned int server_key, 
+                                  memcached_return *error)
 {
   size_t sent_length;
   size_t return_length;
-  char *write_ptr= ptr->write_buffer;
-  size_t write_length= ptr->write_buffer_offset;
-  unsigned int loop= 1;
+  char *write_ptr= ptr->hosts[server_key].write_buffer;
+  size_t write_length= ptr->hosts[server_key].write_buffer_offset;
 
-  if (ptr->write_buffer_offset == 0)
+  *error= MEMCACHED_SUCCESS;
+
+  if (ptr->hosts[server_key].write_buffer_offset == 0)
     return 0;
 
   return_length= 0;
   while (write_length)
   {
-    if (ptr->flags & MEM_NO_BLOCK)
+    sent_length= 0;
+    if (ptr->hosts[server_key].type == MEMCACHED_CONNECTION_UDP)
     {
-      memcached_return rc;
-
-      rc= io_wait(ptr, server_key, 1);
-      if (rc != MEMCACHED_SUCCESS)
-        return -1;
+      sent_length= sendto(ptr->hosts[server_key].fd, 
+                          write_ptr, write_length, 0, 
+                          (struct sockaddr *)&ptr->hosts[server_key].address_info->ai_addr, 
+                          sizeof(struct sockaddr));
     }
-
-    sent_length= 0;
-    if ((ssize_t)(sent_length= write(ptr->hosts[server_key].fd, write_ptr, 
-                                     write_length)) == -1)
+    else
     {
-      switch (errno)
+      if ((ssize_t)(sent_length= write(ptr->hosts[server_key].fd, write_ptr, 
+                                       write_length)) == -1)
       {
-      case ENOBUFS:
-      case EAGAIN:
-        WATCHPOINT;
-        continue;
-        if (loop < 100)
+        switch (errno)
         {
-          loop++;
-          break;
+        case ENOBUFS:
+          continue;
+        case EAGAIN:
+          {
+            memcached_return rc;
+            rc= io_wait(ptr, server_key, MEM_WRITE);
+
+            if (rc == MEMCACHED_SUCCESS)
+              continue;
+
+            memcached_quit_server(ptr, server_key, 1);
+            return -1;
+          }
+        default:
+          memcached_quit_server(ptr, server_key, 1);
+          ptr->cached_errno= errno;
+          *error= MEMCACHED_ERRNO;
+          return -1;
         }
-        /* Yes, we want to fall through */
-      default:
-        ptr->cached_errno= errno;
-        return -1;
       }
     }
 
@@ -167,8 +213,9 @@ ssize_t memcached_io_flush(memcached_st *ptr, unsigned int server_key)
   }
 
   WATCHPOINT_ASSERT(write_length == 0);
-  WATCHPOINT_ASSERT(return_length == ptr->write_buffer_offset);
-  ptr->write_buffer_offset= 0;
+  WATCHPOINT_ASSERT(return_length == ptr->hosts[server_key].write_buffer_offset);
+  ptr->hosts[server_key].write_ptr= ptr->hosts[server_key].write_buffer;
+  ptr->hosts[server_key].write_buffer_offset= 0;
 
   return return_length;
 }
@@ -178,6 +225,7 @@ ssize_t memcached_io_flush(memcached_st *ptr, unsigned int server_key)
 */
 void memcached_io_reset(memcached_st *ptr, unsigned int server_key)
 {
-  ptr->write_buffer_offset= 0;
+  ptr->hosts[server_key].write_ptr= ptr->hosts[server_key].write_buffer;
+  ptr->hosts[server_key].write_buffer_offset= 0;
   memcached_quit(ptr);
 }