git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/do.cc

   1 /* LibMemcached
   2  * Copyright (C) 2006-2010 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary:
   9  *
  10  */
  11
  12 #include <libmemcached/common.h>
  13
  14 memcached_return_t memcached_do(memcached_server_write_instance_st ptr, const void *command,
  15                                 size_t command_length, bool with_flush)
  16 {
  17   memcached_return_t rc;
  18   ssize_t sent_length;
  19
  20   WATCHPOINT_ASSERT(command_length);
  21   WATCHPOINT_ASSERT(command);
  22
  23   if (memcached_failed(rc= memcached_connect(ptr)))
  24   {
  25     WATCHPOINT_ASSERT(rc == memcached_last_error(ptr->root));
  26     WATCHPOINT_ERROR(rc);
  27     return rc;
  28   }
  29
  30   /*
  31   ** Since non buffering ops in UDP mode dont check to make sure they will fit
  32   ** before they start writing, if there is any data in buffer, clear it out,
  33   ** otherwise we might get a partial write.
  34   **/
  35   if (ptr->type == MEMCACHED_CONNECTION_UDP && with_flush && ptr->write_buffer_offset > UDP_DATAGRAM_HEADER_LENGTH)
  36   {
  37     memcached_io_write(ptr, NULL, 0, true);
  38   }
  39
  40   sent_length= memcached_io_write(ptr, command, command_length, with_flush);
  41
  42   if (sent_length == -1 || (size_t)sent_length != command_length)
  43   {
  44     rc= MEMCACHED_WRITE_FAILURE;
  45   }
  46   else if ((ptr->root->flags.no_reply) == 0)
  47   {
  48     memcached_server_response_increment(ptr);
  49   }
  50
  51   return rc;
  52 }
  53
  54 memcached_return_t memcached_vdo(memcached_server_write_instance_st ptr,
  55                                  const struct libmemcached_io_vector_st *vector, size_t count,
  56                                  bool with_flush)
  57 {
  58   memcached_return_t rc;
  59   ssize_t sent_length;
  60
  61   WATCHPOINT_ASSERT(count);
  62   WATCHPOINT_ASSERT(vector);
  63
  64   if (memcached_failed(rc= memcached_connect(ptr)))
  65   {
  66     WATCHPOINT_ERROR(rc);
  67     assert_msg(ptr->error_messages, "memcached_connect() returned an error but the memcached_server_write_instance_st showed none.");
  68     return rc;
  69   }
  70
  71   /*
  72   ** Since non buffering ops in UDP mode dont check to make sure they will fit
  73   ** before they start writing, if there is any data in buffer, clear it out,
  74   ** otherwise we might get a partial write.
  75   **/
  76   if (ptr->type == MEMCACHED_CONNECTION_UDP && with_flush && ptr->write_buffer_offset > UDP_DATAGRAM_HEADER_LENGTH)
  77   {
  78     memcached_io_write(ptr, NULL, 0, true);
  79   }
  80
  81   sent_length= memcached_io_writev(ptr, vector, count, with_flush);
  82
  83   size_t command_length= 0;
  84   for (uint32_t x= 0; x < count; ++x, vector++)
  85   {
  86     command_length+= vector->length;
  87   }
  88
  89   if (sent_length == -1 or size_t(sent_length) != command_length)
  90   {
  91     rc= MEMCACHED_WRITE_FAILURE;
  92     WATCHPOINT_ERROR(rc);
  93     WATCHPOINT_ERRNO(errno);
  94   }
  95   else if ((ptr->root->flags.no_reply) == 0)
  96   {
  97     memcached_server_response_increment(ptr);
  98   }
  99
 100   return rc;
 101 }