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

   1 .TH "MEMCACHED_FETCH" "3" "July 05, 2012" "1.0.9" "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 Deprecated since version 0.50: Use \fBmemcached_fetch_result()\fP instead.
  40 .UNINDENT
  41 .sp
  42 Compile and link with \-lmemcached
  43 .SH DESCRIPTION
  44 .sp
  45 \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.
  46 You must pass in a key and its length to fetch the object. You must supply
  47 three pointer variables which will give you the state of the returned
  48 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
  49 object, and a \fBmemcached_return_t\fP pointer to hold any error. The
  50 object will be returned upon success and NULL will be returned on failure. \fBMEMCACHED_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.
  51 .sp
  52 Values returned by \fI\%memcached_fetch()\fP must be freed by the caller.
  53 .sp
  54 All of the above functions are not tested when the
  55 \fBMEMCACHED_BEHAVIOR_USE_UDP\fP has been set. Executing any of these
  56 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.
  57 .SH RETURN
  58 .sp
  59 \fI\%memcached_fetch()\fP sets error to
  60 to \fBMEMCACHED_END\fP upon successful conclusion.
  61 \fBMEMCACHED_NOTFOUND\fP will be return if no keys at all were found.
  62 .sp
  63 \fBMEMCACHED_KEY_TOO_BIG\fP is set to error whenever \fI\%memcached_fetch()\fP was used
  64 and the key was set larger then \fBMEMCACHED_MAX_KEY\fP, which was the largest
  65 key allowed for the original memcached ascii server.
  66 .SH HOME
  67 .sp
  68 To find out more information please check:
  69 \fI\%http://libmemcached.org/\fP
  70 .SH SEE ALSO
  71 .sp
  72 \fImemcached(1)\fP \fIlibmemcached(3)\fP \fImemcached_strerror(3)\fP \fImemcached_fetch_result(3)\fP
  73 .SH AUTHOR
  74 Brian Aker
  75 .SH COPYRIGHT
  76 2011, Brian Aker DataDifferential, http://datadifferential.com/
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