MEMCACHED_RESULT_FREE(3)

📦
version 1.1.4 · 12 versions
, in fedora 43

💖 NAME 💖

memcached_result_free — working with result sets, bestie 💅

okay so this is a page from libmemcached-awesome, section 3 of the manual, and it's all about the memcached_result_free(3) family of functions. let's get into it 🫶

✨ SYNOPSIS ✨

#include <libmemcached/memcached.h>
       Compile and link with -lmemcachedutil -lmemcached

typedef struct memcached_result_st memcached_result_st

memcached_result_st *memcached_result_create(memcached_st *ptr, memcached_result_st *result)

Parameters

  • ptr -- pointer to initialized memcached_st struct
  • result -- pointer to an memcached_result_st instance to initialize or nullptr to allocate a new instance

Returns

pointer to initialized memcached_result_st instance 🌸

void memcached_result_free(memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

const char *memcached_result_key_value(memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

Returns

the key value associated with the current result object 🔑

size_t memcached_result_key_length(const memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

Returns

the key length associated with the current result object 📏

const char *memcached_result_value(memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

Returns

the result value associated with the current result object 💎

char *memcached_result_take_value(memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

Returns

the result value associated with the current result object 🎀

size_t memcached_result_length(const memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

Returns

the result length associated with the current result object 📐

uint32_t memcached_result_flags(const memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

Returns

the flags associated with the current result object 🚩

uint64_t memcached_result_cas(const memcached_result_st *result)

Parameters

  • result -- pointer to initialized memcached_result_st struct

Returns

the cas associated with the current result object 🔥

memcached_return_t memcached_result_set_value(memcached_result_st *result, const char *value, size_t length)

Parameters

  • result -- pointer to initialized memcached_result_st struct
  • value -- byte array to set the value of the current result object to
  • length -- the length of value wothout any terminating zero

Returns

memcached_return_t indicating success ✨

void memcached_result_set_flags(memcached_result_st *result, uint32_t flags)

Parameters

  • result -- pointer to initialized memcached_result_st struct
  • flags -- a new value for the flags field

void memcached_result_set_expiration(memcached_result_st *result, time_t expiration)

Parameters

  • result -- pointer to initialized memcached_result_st struct
  • expiration -- a new value for the expiration field

🌈 DESCRIPTION 🌈

so here's the tea, bestie ☕ — libmemcached can optionally hand you back a memcached_result_st, which is literally a whole result object. and ngl, these result objects have added benefits over the plain character pointer return values, because they're forward compatible with new return items that future memcached servers might implement (the best current example of this is the CAS return item, iconic honestly). the structures can also be reused, which will save on calls to malloc(3). so the suggestion is, like, use result objects over char * return functions. do it. periodt 💅

the structure of memcached_result_st has been encapsulated, so you should not write code directly accessing members of the structure. no touching the internals, bestie 🙈

  • memcached_result_create() will either allocate memory for a memcached_result_st or will initialize a structure passed to it.
  • memcached_result_free() will deallocate any memory attached to the structure. If the structure was also allocated, it will deallocate it.
  • memcached_result_key_value() returns the key value associated with the current result object.
  • memcached_result_key_length() returns the key length associated with the current result object.
  • memcached_result_value() returns the result value associated with the current result object.
  • memcached_result_take_value() returns and hands over the result value associated with the current result object. You must call free(3) to release this value, unless you have made use of a custom allocator. Use of a custom allocator requires that you create your own custom free() to release it.
  • memcached_result_length() returns the result length associated with the current result object.
  • memcached_result_flags() returns the flags associated with the current result object.
  • memcached_result_cas() returns the cas associated with the current result object. This value will only be available if the server tests it.
  • memcached_result_set_value() takes a byte array and a size and sets the result to this value. This function is used for trigger responses.
  • memcached_result_set_flags() takes a result structure and stores a new value for the flags field.
  • memcached_result_set_expiration() takes a result structure and stores a new value for the expiration field (this is only used by read through triggers).
🫶 friendly lil reminder that memcached_result_take_value() hands the value over to YOU — so it's on you to free(3) it, unless a custom allocator is in the mix, in which case you gotta bring your own custom free().

💀 RETURN VALUE 💀

Varies, see particular functions. All structures must have memcached_result_free() called on them for cleanup purposes. Failure to do this will result in leaked memory. like, memory leak energy. not the vibe. call the free. 😭

👑 SEE ALSO 👑

libmemcached-awesome — version 1.1, dated Jul 24, 2025. that's the whole page bestie, go free your results and slay ✨💖🦋

📦 where this page comes from