cache_callbacks(3) [mojave man page]
cache_callbacks(3) BSD Library Functions Manual cache_callbacks(3) NAME
cache_callbacks -- Pre-defined cache callbacks used to configure a cache SYNOPSIS
#include <cache.h> #include <cache_callbacks.h> uintptr_t cache_key_hash_cb_cstring(void *key, void *unused); uintptr_t cache_key_hash_cb_integer(void *key, void *unused); bool cache_key_is_equal_cb_cstring(void *key1, void *key2, void *unused); bool cache_key_is_equal_cb_integer(void *key1, void *key2, void *unused); void cache_release_cb_free(void *key_or_value, void *unused); void cache_value_make_purgeable_cb(void *value, void *unused); bool cache_value_make_nonpurgeable_cb(void *value, void *unused); uintptr_t cache_hash_byte_string(const char *data, size_t bytes); DESCRIPTION
These functions are intended to be used as callbacks to configure how a cache functions. They should be set in the cache_attributes_t passed into cache_create. They support common key types and offer support for using purgeable memory to allocate cache values. cache_key_hash_cb_cstring() A key_hash_cb() function for NULL-terminated cstring keys. cache_key_hash_cb_integer() A key_hash_cb() function for integer keys. cache_key_is_equal_cb_cstring() A key_is_equal_cb() function for cstring keys. cache_key_is_equal_cb_integer() A key_is_equal_cb() function for integer keys. cache_release_cb_free() Can be used for key_release_cb() or value_release_cb() for keys/values allocated from malloc and family. cache_value_make_purgeable_cb() Can be used for value_make_purgeable() with values allocated from the purgeable malloc zone (see malloc/mal- loc.h). Calls malloc_make_purgeable() on value when it is unreferenced in order to reduce paging under memory pressure. value_make_purgeable() with values allocated from the purgeable malloc zone (see malloc/malloc.h). Calls malloc_make_purgeable() on value when it is unreferenced in order to reduce paging under memory pressure. cache_hash_byte_string() Calculates a hash from a bytes string data of length bytes. SEE ALSO
libcache(3) cache_create(3) Darwin May 7, 2009 Darwin
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cache_callbacks(3) BSD Library Functions Manual cache_callbacks(3) NAME
cache_callbacks -- Pre-defined cache callbacks used to configure a cache SYNOPSIS
#include <cache.h> #include <cache_callbacks.h> uintptr_t cache_key_hash_cb_cstring(void *key, void *unused); uintptr_t cache_key_hash_cb_integer(void *key, void *unused); bool cache_key_is_equal_cb_cstring(void *key1, void *key2, void *unused); bool cache_key_is_equal_cb_integer(void *key1, void *key2, void *unused); void cache_release_cb_free(void *key_or_value, void *unused); void cache_value_make_purgeable_cb(void *value, void *unused); bool cache_value_make_nonpurgeable_cb(void *value, void *unused); uintptr_t cache_hash_byte_string(const char *data, size_t bytes); DESCRIPTION
These functions are intended to be used as callbacks to configure how a cache functions. They should be set in the cache_attributes_t passed into cache_create. They support common key types and offer support for using purgeable memory to allocate cache values. cache_key_hash_cb_cstring() A key_hash_cb() function for NULL-terminated cstring keys. cache_key_hash_cb_integer() A key_hash_cb() function for integer keys. cache_key_is_equal_cb_cstring() A key_is_equal_cb() function for cstring keys. cache_key_is_equal_cb_integer() A key_is_equal_cb() function for integer keys. cache_release_cb_free() Can be used for key_release_cb() or value_release_cb() for keys/values allocated from malloc and family. cache_value_make_purgeable_cb() Can be used for value_make_purgeable() with values allocated from the purgeable malloc zone (see malloc/mal- loc.h). Calls malloc_make_purgeable() on value when it is unreferenced in order to reduce paging under memory pressure. value_make_purgeable() with values allocated from the purgeable malloc zone (see malloc/malloc.h). Calls malloc_make_purgeable() on value when it is unreferenced in order to reduce paging under memory pressure. cache_hash_byte_string() Calculates a hash from a bytes string data of length bytes. SEE ALSO
libcache(3) cache_create(3) Darwin May 7, 2009 Darwin