Work inspired by matt knox
[m6w6/libmemcached] / 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 memcached_io_close(ptr);
44
45 ptr->fd= -1;
46 ptr->write_buffer_offset= (ptr->type == MEMCACHED_CONNECTION_UDP) ? UDP_DATAGRAM_HEADER_LENGTH : 0 ;
47 ptr->read_buffer_length= 0;
48 ptr->read_ptr= ptr->read_buffer;
49 memcached_server_response_reset(ptr);
50 }
51
52 ptr->server_failure_counter++;
53 }
54
55 void memcached_quit(memcached_st *ptr)
56 {
57 unsigned int x;
58
59 if (ptr->hosts == NULL ||
60 ptr->number_of_hosts == 0)
61 return;
62
63 if (ptr->hosts && ptr->number_of_hosts)
64 {
65 for (x= 0; x < ptr->number_of_hosts; x++)
66 memcached_quit_server(&ptr->hosts[x], 0);
67 }
68 }