1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker
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40 #include <libmemcached/common.h>
43 bool memcached_purge(memcached_server_write_instance_st ptr
)
45 memcached_st
*root
= (memcached_st
*)ptr
->root
;
47 if (memcached_is_purging(ptr
->root
) || /* already purging */
48 (memcached_server_response_count(ptr
) < ptr
->root
->io_msg_watermark
&&
49 ptr
->io_bytes_sent
< ptr
->root
->io_bytes_watermark
) ||
50 (ptr
->io_bytes_sent
>= ptr
->root
->io_bytes_watermark
&&
51 memcached_server_response_count(ptr
) < 2))
57 memcached_io_write and memcached_response may call memcached_purge
58 so we need to be able stop any recursion..
60 memcached_set_purging(root
, true);
62 WATCHPOINT_ASSERT(ptr
->fd
!= INVALID_SOCKET
);
64 Force a flush of the buffer to ensure that we don't have the n-1 pending
65 requests buffered up..
67 if (memcached_io_write(ptr
) == false)
69 memcached_set_purging(root
, true);
71 memcached_set_error(*ptr
, MEMCACHED_WRITE_FAILURE
, MEMCACHED_AT
);
74 WATCHPOINT_ASSERT(ptr
->fd
!= INVALID_SOCKET
);
76 bool is_successful
= true;
77 uint32_t no_msg
= memcached_server_response_count(ptr
) - 1;
80 memcached_result_st result
;
81 memcached_result_st
*result_ptr
;
84 * We need to increase the timeout, because we might be waiting for
85 * data to be sent from the server (the commands was in the output buffer
88 const int32_t timeo
= ptr
->root
->poll_timeout
;
89 root
->poll_timeout
= 2000;
91 result_ptr
= memcached_result_create(root
, &result
);
92 WATCHPOINT_ASSERT(result_ptr
);
94 for (uint32_t x
= 0; x
< no_msg
; x
++)
96 memcached_result_reset(result_ptr
);
97 memcached_return_t rc
= memcached_read_one_response(ptr
, result_ptr
);
99 * Purge doesn't care for what kind of command results that is received.
100 * The only kind of errors I care about if is I'm out of sync with the
101 * protocol or have problems reading data from the network..
103 if (rc
== MEMCACHED_PROTOCOL_ERROR
or rc
== MEMCACHED_UNKNOWN_READ_FAILURE
or rc
== MEMCACHED_READ_FAILURE
)
105 WATCHPOINT_ERROR(rc
);
106 memcached_io_reset(ptr
);
107 is_successful
= false;
110 if (ptr
->root
->callbacks
!= NULL
)
112 memcached_callback_st cb
= *ptr
->root
->callbacks
;
113 if (memcached_success(rc
))
115 for (uint32_t y
= 0; y
< cb
.number_of_callback
; y
++)
117 if (memcached_fatal((*cb
.callback
[y
])(ptr
->root
, result_ptr
, cb
.context
)))
126 memcached_result_free(result_ptr
);
127 root
->poll_timeout
= timeo
;
129 memcached_set_purging(root
, false);
131 return is_successful
;