Merge for Dmitry
[awesomized/libmemcached] / 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 && ptr->options.is_shutting_down == false)
17 {
18 memcached_return_t rc;
19 char buffer[MEMCACHED_MAX_BUFFER];
20
21 ptr->options.is_shutting_down= true;
22
23 if (ptr->root->flags.binary_protocol)
24 {
25 protocol_binary_request_quit request = {.bytes= {0}};
26 request.message.header.request.magic = PROTOCOL_BINARY_REQ;
27 request.message.header.request.opcode = PROTOCOL_BINARY_CMD_QUIT;
28 request.message.header.request.datatype = PROTOCOL_BINARY_RAW_BYTES;
29 rc= memcached_do(ptr, request.bytes, sizeof(request.bytes), true);
30 }
31 else
32 {
33 rc= memcached_do(ptr, "quit\r\n", sizeof("quit\r\n"), true);
34 }
35
36 WATCHPOINT_ASSERT(rc == MEMCACHED_SUCCESS || rc == MEMCACHED_FETCH_NOTFINISHED);
37 (void)rc; // Shut up ICC
38
39 /* read until socket is closed, or there is an error
40 * closing the socket before all data is read
41 * results in server throwing away all data which is
42 * not read
43 */
44 ssize_t nread;
45 while (memcached_io_read(ptr, buffer, sizeof(buffer)/sizeof(*buffer),
46 &nread) == MEMCACHED_SUCCESS);
47
48 /*
49 * memcached_io_read may call memcached_quit_server with io_death if
50 * it encounters problems, but we don't care about those occurences.
51 * The intention of that loop is to drain the data sent from the
52 * server to ensure that the server processed all of the data we
53 * sent to the server.
54 */
55 ptr->server_failure_counter= 0;
56 }
57 memcached_io_close(ptr);
58 }
59
60 ptr->fd= -1;
61 ptr->write_buffer_offset= (size_t) ((ptr->type == MEMCACHED_CONNECTION_UDP) ? UDP_DATAGRAM_HEADER_LENGTH : 0);
62 ptr->read_buffer_length= 0;
63 ptr->read_ptr= ptr->read_buffer;
64 ptr->options.is_shutting_down= false;
65 memcached_server_response_reset(ptr);
66
67 if (io_death)
68 {
69 ptr->server_failure_counter++;
70 }
71 }
72
73 void memcached_quit(memcached_st *ptr)
74 {
75 uint32_t x;
76
77 if (memcached_server_count(ptr) == 0)
78 return;
79
80 if (memcached_server_count(ptr))
81 {
82 for (x= 0; x < memcached_server_count(ptr); x++)
83 {
84 memcached_server_write_instance_st instance=
85 memcached_server_instance_fetch(ptr, x);
86
87 memcached_quit_server(instance, false);
88 }
89 }
90 }