git.m6w6.name Git - awesomized/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   assert_msg(command_length, "Programming error, somehow a command had a length of zero");
  18   assert_msg(command, "Programming error, somehow a command was NULL");
  19
  20   memcached_return_t rc;
  21   if (memcached_failed(rc= memcached_connect(ptr)))
  22   {
  23     WATCHPOINT_ASSERT(rc == memcached_last_error(ptr->root));
  24     WATCHPOINT_ERROR(rc);
  25     return rc;
  26   }
  27
  28   /*
  29   ** Since non buffering ops in UDP mode dont check to make sure they will fit
  30   ** before they start writing, if there is any data in buffer, clear it out,
  31   ** otherwise we might get a partial write.
  32   **/
  33   if (ptr->type == MEMCACHED_CONNECTION_UDP && with_flush && ptr->write_buffer_offset > UDP_DATAGRAM_HEADER_LENGTH)
  34   {
  35     memcached_io_write(ptr, NULL, 0, true);
  36   }
  37
  38   ssize_t sent_length= memcached_io_write(ptr, command, command_length, with_flush);
  39
  40   if (sent_length == -1 or size_t(sent_length) != command_length)
  41   {
  42     rc= MEMCACHED_WRITE_FAILURE;
  43   }
  44   else if ((ptr->root->flags.no_reply) == 0)
  45   {
  46     memcached_server_response_increment(ptr);
  47   }
  48
  49   return rc;
  50 }
  51
  52 memcached_return_t memcached_vdo(memcached_server_write_instance_st ptr,
  53                                  const struct libmemcached_io_vector_st *vector, size_t count,
  54                                  bool with_flush)
  55 {
  56   memcached_return_t rc;
  57
  58   WATCHPOINT_ASSERT(count);
  59   WATCHPOINT_ASSERT(vector);
  60
  61   if (memcached_failed(rc= memcached_connect(ptr)))
  62   {
  63     WATCHPOINT_ERROR(rc);
  64     assert_msg(ptr->error_messages, "memcached_connect() returned an error but the memcached_server_write_instance_st showed none.");
  65     return rc;
  66   }
  67
  68   /*
  69   ** Since non buffering ops in UDP mode dont check to make sure they will fit
  70   ** before they start writing, if there is any data in buffer, clear it out,
  71   ** otherwise we might get a partial write.
  72   **/
  73   if (ptr->type == MEMCACHED_CONNECTION_UDP && with_flush && ptr->write_buffer_offset > UDP_DATAGRAM_HEADER_LENGTH)
  74   {
  75     memcached_io_write(ptr, NULL, 0, true);
  76   }
  77
  78   ssize_t sent_length= memcached_io_writev(ptr, vector, count, with_flush);
  79
  80   size_t command_length= 0;
  81   for (uint32_t x= 0; x < count; ++x, vector++)
  82   {
  83     command_length+= vector->length;
  84   }
  85
  86   if (sent_length == -1 or size_t(sent_length) != command_length)
  87   {
  88     rc= MEMCACHED_WRITE_FAILURE;
  89     WATCHPOINT_ERROR(rc);
  90     WATCHPOINT_ERRNO(errno);
  91   }
  92   else if ((ptr->root->flags.no_reply) == 0)
  93   {
  94     memcached_server_response_increment(ptr);
  95   }
  96
  97   return rc;
  98 }