git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/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, bool io_death)
  13 {
  14   if (ptr->fd != -1)
  15   {
  16     if (io_death == false && ptr->type != MEMCACHED_CONNECTION_UDP)
  17     {
  18       memcached_return_t rc;
  19       char buffer[MEMCACHED_MAX_BUFFER];
  20
  21       if (ptr->root->flags.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), true);
  28       }
  29       else
  30       {
  31         rc= memcached_do(ptr, "quit\r\n", sizeof("quit\r\n"), true);
  32       }
  33
  34       WATCHPOINT_ASSERT(rc == MEMCACHED_SUCCESS || rc == MEMCACHED_FETCH_NOTFINISHED);
  35       (void)rc; // Shut up ICC
  36
  37       /* read until socket is closed, or there is an error
  38        * closing the socket before all data is read
  39        * results in server throwing away all data which is
  40        * not read
  41        */
  42       ssize_t nread;
  43       while (memcached_io_read(ptr, buffer, sizeof(buffer)/sizeof(*buffer),
  44                                &nread) == MEMCACHED_SUCCESS);
  45
  46       /*
  47        * memcached_io_read may call memcached_quit_server with io_death if
  48        * it encounters problems, but we don't care about those occurences.
  49        * The intention of that loop is to drain the data sent from the
  50        * server to ensure that the server processed all of the data we
  51        * sent to the server.
  52        */
  53       ptr->server_failure_counter= 0;
  54     }
  55     memcached_io_close(ptr);
  56   }
  57
  58   ptr->fd= -1;
  59   ptr->write_buffer_offset= (size_t) ((ptr->type == MEMCACHED_CONNECTION_UDP) ? UDP_DATAGRAM_HEADER_LENGTH : 0);
  60   ptr->read_buffer_length= 0;
  61   ptr->read_ptr= ptr->read_buffer;
  62   memcached_server_response_reset(ptr);
  63
  64   if (io_death)
  65   {
  66     ptr->server_failure_counter++;
  67   }
  68 }
  69
  70 void memcached_quit(memcached_st *ptr)
  71 {
  72   uint32_t x;
  73
  74   if (memcached_server_count(ptr) == 0)
  75     return;
  76
  77   if (memcached_server_count(ptr))
  78   {
  79     for (x= 0; x < memcached_server_count(ptr); x++)
  80     {
  81       memcached_server_instance_st *instance=
  82         memcached_server_instance_fetch(ptr, x);
  83
  84       memcached_quit_server(instance, 0);
  85     }
  86   }
  87 }