MEMCACHED_POOL_DESTROY(3) libmemcached-awesome MEMCACHED_POOL_DESTROY(3) NAME memcached_pool_destroy - libmemcached Documentation SYNOPSIS #include Compile and link with -lmemcachedutil -lmemcached typedef struct memcached_pool_st memcached_pool_st memcached_pool_st *memcached_pool(const char *option_string, size_t option_string_length) Parameters o option_string -- configuration <> string o option_string_length -- length of options_string without any trailing zero byte Returns allocated and initialized memcached_pool_st instance on success or nullptr on failure memcached_st <#_CPPv412memcached_st> *memcached_pool_destroy(memcached_pool_st *pool) Parameters pool -- initialized memcached_pool_st instance to free Returns pointer to the 'master' memcached_st <# _CPPv412memcached_st> instance by legacy memcached_st <#_CPPv412memcached_st> *memcached_pool_fetch(memcached_pool_st *pool, struct timespec *relative_time, memcached_return_t <#_CPPv418memcached_return_t> *rc) Added in version 0.53: Synonym for memcached_pool_pop Parameters o pool -- initialized memcached_pool_st instance o relative_time -- time to block thread and wait for a connection to become available when pool size is exceeded, unless nullptr o rc -- out pointer to memcached_return_t <# _CPPv418memcached_return_t> Returns pointer to an available memcached_st <# _CPPv412memcached_st> instance memcached_return_t <#_CPPv418memcached_return_t> memcached_pool_release(memcached_pool_st *pool, memcached_st <# _CPPv412memcached_st> *mmc) Added in version 0.53: Synonym for memcached_pool_push. Parameters o pool -- initialized memcached_pool_st instance o mmc -- the memcached_st <#_CPPv412memcached_st> instance to return to the pool Returns memcached_return_t <#_CPPv418memcached_return_t> indicating success memcached_return_t <#_CPPv418memcached_return_t> memcached_pool_behavior_set(memcached_pool_st *pool, memcached_behavior_t <#_CPPv420memcached_behavior_t> flag, uint64_t data) Parameters o pool -- initialized memcached_pool_st instance o flag -- the behavior <> to change o value -- the value to set for flag Returns memcached_return_t <#_CPPv418memcached_return_t> indicating success memcached_return_t <#_CPPv418memcached_return_t> memcached_pool_behavior_get(memcached_pool_st *pool, memcached_behavior_t <#_CPPv420memcached_behavior_t> flag, uint64_t *value) Parameters o pool -- initialized memcached_pool_st instance o flag -- the behavior <> to read o value -- out pointer to receive the set value of flag Returns memcached_return_t <#_CPPv418memcached_return_t> indicating success memcached_pool_st *memcached_pool_create(memcached_st <# _CPPv412memcached_st> *mmc, int initial, int max) Deprecated since version 0.46: Use memcached_pool() memcached_st <#_CPPv412memcached_st> *memcached_pool_pop(memcached_pool_st *pool, bool block, memcached_return_t <#_CPPv418memcached_return_t> *rc) Deprecated since version 0.53: Use memcached_pool_fetch() memcached_return_t <#_CPPv418memcached_return_t> memcached_pool_push(memcached_pool_st *pool, memcached_st <# _CPPv412memcached_st> *mmc) Deprecated since version 0.53: Use memcached_pool_release() DESCRIPTION memcached_pool() is used to create a connection pool of objects you may use to remove the overhead of using memcached_clone for short lived memcached_st <#_CPPv412memcached_st> objects. Please see libmemcached Configuration <> for details on the format of the configuration string. memcached_pool_destroy() is used to destroy the connection pool created with memcached_pool_create() and release all allocated resources. It will return the pointer to the memcached_st <#_CPPv412memcached_st> structure passed as an argument to memcached_pool_create(), and returns the ownership of the pointer to the caller when created with memcached_pool_create(), otherwise NULL is returned.. memcached_pool_fetch() is used to fetch a connection structure from the connection pool. The relative_time argument specifies if the function should block and wait for a connection structure to be available if we try to exceed the maximum size. You need to specify time in relative time. memcached_pool_release() is used to return a connection structure back to the pool. memcached_pool_behavior_get() and memcached_pool_behavior_set() is used to get/set behavior flags on all connections in the pool. Both memcached_pool_release() and memcached_pool_fetch() are thread safe. RETURN VALUE memcached_pool_destroy() returns the pointer (and ownership) to the memcached_st <#_CPPv412memcached_st> structure used to create the pool. If connections are in use it returns NULL. memcached_pool_pop() returns a pointer to a memcached_st <# _CPPv412memcached_st> structure from the pool (or NULL if an allocation cannot be satisfied). memcached_pool_release() returns MEMCACHED_SUCCESS <# _CPPv4N18memcached_return_t17MEMCACHED_SUCCESSE> upon success. memcached_pool_behavior_get() and memcached_pool_behavior_get() return MEMCACHED_SUCCESS <#_CPPv4N18memcached_return_t17MEMCACHED_SUCCESSE> upon success. memcached_pool_fetch() may return MEMCACHED_TIMEOUT <# _CPPv4N18memcached_return_t17MEMCACHED_TIMEOUTE> if a timeout occurs while waiting for a free memcached_st <#_CPPv412memcached_st> instance, MEMCACHED_NOTFOUND <#_CPPv4N18memcached_return_t18MEMCACHED_NOTFOUNDE> if no memcached_st <#_CPPv412memcached_st> instance was available, respectively. Note: If any method returns MEMCACHED_IN_PROGRESS then a lock on the pool could not be obtained. If any of the parameters passed to any of these functions is invalid, MEMCACHED_INVALID_ARGUMENTS <# _CPPv4N18memcached_return_t27MEMCACHED_INVALID_ARGUMENTSE> will be returned. SEE ALSO memcached(1) libmemcached(3) libmemcached_configuration(3) memcached_strerror(3) 1.1 March 7, 2026 MEMCACHED_POOL_DESTROY(3)