git.m6w6.name Git - m6w6/libmemcached/blob - docs/man/memcached_fetch.3

   1 .TH "MEMCACHED_FETCH" "3" "October 18, 2011" "1.01" "libmemcached"
   2 .SH NAME
   3 memcached_fetch \- Retrieving data from the server
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  33 .SH SYNOPSIS
  34 .sp
  35 #include <libmemcached/memcached.h>
  36 .INDENT 0.0
  37 .TP
  38 .B char *memcached_fetch(memcached_st\fI\ *ptr\fP, char\fI\ *key\fP, size_t\fI\ *key_length\fP, size_t\fI\ *value_length\fP, uint32_t\fI\ *flags\fP, memcached_return_t\fI\ *error\fP)
  39 .sp
  40 Deprecated since version 0.50: Use \fBmemcached_fetch_result()\fP instead.
  41 .UNINDENT
  42 .sp
  43 Compile and link with \-lmemcached
  44 .SH DESCRIPTION
  45 .sp
  46 \fI\%memcached_fetch()\fP is used to fetch an individual value from the server. \fBmemcached_mget()\fP must always be called before using this method.
  47 You must pass in a key and its length to fetch the object. You must supply
  48 three pointer variables which will give you the state of the returned
  49 object.  A \fBuint32_t\fP pointer to contain whatever flags you stored with the value, a \fBsize_t\fP pointer which will be filled with size of of the
  50 object, and a \fBmemcached_return_t\fP pointer to hold any error. The
  51 object will be returned upon success and NULL will be returned on failure. \fBMEMCACHD_END\fP is returned by the *error value when all objects that have been found are returned. The final value upon \fBMEMCACHED_END\fP is null.
  52 .sp
  53 Values returned by \fI\%memcached_fetch()\fP must be freed by the caller.
  54 .sp
  55 All of the above functions are not tested when the
  56 \fBMEMCACHED_BEHAVIOR_USE_UDP\fP has been set. Executing any of these
  57 functions with this behavior on will result in \fBMEMCACHED_NOT_SUPPORTED\fP being returned, or for those functions which do not return a \fBmemcached_return_t\fP, the error function parameter will be set to \fBMEMCACHED_NOT_SUPPORTED\fP.
  58 .SH RETURN
  59 .sp
  60 \fI\%memcached_fetch()\fP sets error to
  61 to \fBMEMCACHED_END\fP upon successful conclusion.
  62 \fBMEMCACHED_NOTFOUND\fP will be return if no keys at all were found.
  63 .sp
  64 \fBMEMCACHED_KEY_TOO_BIG\fP is set to error whenever :c:\fBmemcached_fetch()\fP was used
  65 and the key was set larger then \fBMEMCACHED_MAX_KEY\fP, which was the largest
  66 key allowed for the original memcached ascii server.
  67 .SH HOME
  68 .sp
  69 To find out more information please check:
  70 \fI\%http://libmemcached.org/\fP
  71 .SH SEE ALSO
  72 .sp
  73 \fImemcached(1)\fP \fIlibmemcached(3)\fP \fImemcached_strerror(3)\fP \fImemcached_fetch_result(3)\fP
  74 .SH AUTHOR
  75 Brian Aker
  76 .SH COPYRIGHT
  77 2011, Brian Aker DataDifferential, http://datadifferential.com/
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