git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/memcached_quit.c

   1 #include "common.h"
   2
   3 /*
   4   This closes all connections (forces flush of input as well).
   5
   6   Maybe add a host specific, or key specific version?
   7
   8   The reason we send "quit" is that in case we have buffered IO, this
   9   will force data to be completed.
  10 */
  11
  12 void memcached_quit_server(memcached_server_st *ptr, uint8_t io_death)
  13 {
  14   if (ptr->fd != -1)
  15   {
  16     if (io_death == 0 && ptr->type != MEMCACHED_CONNECTION_UDP)
  17     {
  18       memcached_return rc;
  19       char buffer[MEMCACHED_MAX_BUFFER];
  20
  21       if (ptr->root->flags & MEM_BINARY_PROTOCOL)
  22       {
  23         protocol_binary_request_quit request = {.bytes= {0}};
  24         request.message.header.request.magic = PROTOCOL_BINARY_REQ;
  25         request.message.header.request.opcode = PROTOCOL_BINARY_CMD_QUIT;
  26         request.message.header.request.datatype = PROTOCOL_BINARY_RAW_BYTES;
  27         rc= memcached_do(ptr, request.bytes, sizeof(request.bytes), 1);
  28       }
  29       else
  30         rc= memcached_do(ptr, "quit\r\n", 6, 1);
  31
  32       WATCHPOINT_ASSERT(rc == MEMCACHED_SUCCESS || rc == MEMCACHED_FETCH_NOTFINISHED);
  33
  34       /* read until socket is closed, or there is an error
  35        * closing the socket before all data is read
  36        * results in server throwing away all data which is
  37        * not read
  38        */
  39       ssize_t nread;
  40       while (memcached_io_read(ptr, buffer, sizeof(buffer)/sizeof(*buffer),
  41                                &nread) == MEMCACHED_SUCCESS);
  42
  43       /*
  44        * memcached_io_read may call memcached_quit_server with io_death if
  45        * it encounters problems, but we don't care about those occurences.
  46        * The intention of that loop is to drain the data sent from the
  47        * server to ensure that the server processed all of the data we
  48        * sent to the server.
  49        */
  50       ptr->server_failure_counter= 0;
  51     }
  52     memcached_io_close(ptr);
  53
  54     ptr->fd= -1;
  55     ptr->write_buffer_offset= (size_t) ((ptr->type == MEMCACHED_CONNECTION_UDP) ? UDP_DATAGRAM_HEADER_LENGTH : 0);
  56     ptr->read_buffer_length= 0;
  57     ptr->read_ptr= ptr->read_buffer;
  58     memcached_server_response_reset(ptr);
  59   }
  60
  61   if(io_death) ptr->server_failure_counter++;
  62 }
  63
  64 void memcached_quit(memcached_st *ptr)
  65 {
  66   unsigned int x;
  67
  68   if (ptr->hosts == NULL ||
  69       ptr->number_of_hosts == 0)
  70     return;
  71
  72   if (ptr->hosts && ptr->number_of_hosts)
  73   {
  74     for (x= 0; x < ptr->number_of_hosts; x++)
  75       memcached_quit_server(&ptr->hosts[x], 0);
  76   }
  77 }