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/**
* @file lv_cache.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_cache.h"
#include "../../stdlib/lv_sprintf.h"
#include "../lv_assert.h"
#include "lv_cache_entry_private.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void cache_drop_internal_no_lock(lv_cache_t * cache, const void * key, void * user_data);
static bool cache_evict_one_internal_no_lock(lv_cache_t * cache, void * user_data);
static lv_cache_entry_t * cache_add_internal_no_lock(lv_cache_t * cache, const void * key, void * user_data);
/**********************
* GLOBAL VARIABLES
**********************/
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_cache_t * lv_cache_create(const lv_cache_class_t * cache_class,
size_t node_size, size_t max_size,
lv_cache_ops_t ops)
{
lv_cache_t * cache = cache_class->alloc_cb();
LV_ASSERT_MALLOC(cache);
cache->clz = cache_class;
cache->node_size = node_size;
cache->max_size = max_size;
cache->size = 0;
cache->ops = ops;
if(cache->clz->init_cb(cache) == false) {
LV_LOG_ERROR("Cache init failed");
lv_free(cache);
return NULL;
}
lv_mutex_init(&cache->lock);
return cache;
}
void lv_cache_destroy(lv_cache_t * cache, void * user_data)
{
LV_ASSERT_NULL(cache);
lv_mutex_lock(&cache->lock);
cache->clz->destroy_cb(cache, user_data);
lv_mutex_unlock(&cache->lock);
lv_mutex_delete(&cache->lock);
lv_free(cache);
}
lv_cache_entry_t * lv_cache_acquire(lv_cache_t * cache, const void * key, void * user_data)
{
LV_ASSERT_NULL(cache);
LV_ASSERT_NULL(key);
lv_mutex_lock(&cache->lock);
lv_cache_entry_t * entry = cache->clz->get_cb(cache, key, user_data);
if(entry != NULL) {
lv_cache_entry_acquire_data(entry);
}
lv_mutex_unlock(&cache->lock);
return entry;
}
void lv_cache_release(lv_cache_t * cache, lv_cache_entry_t * entry, void * user_data)
{
LV_ASSERT_NULL(entry);
lv_mutex_lock(&cache->lock);
lv_cache_entry_release_data(entry, user_data);
if(lv_cache_entry_get_ref(entry) == 0 && lv_cache_entry_is_invalid(entry)) {
cache->ops.free_cb(lv_cache_entry_get_data(entry), user_data);
lv_cache_entry_delete(entry);
}
lv_mutex_unlock(&cache->lock);
}
lv_cache_entry_t * lv_cache_add(lv_cache_t * cache, const void * key, void * user_data)
{
LV_ASSERT_NULL(cache);
LV_ASSERT_NULL(key);
lv_mutex_lock(&cache->lock);
lv_cache_entry_t * entry = cache_add_internal_no_lock(cache, key, user_data);
if(entry != NULL) {
lv_cache_entry_acquire_data(entry);
}
lv_mutex_unlock(&cache->lock);
return entry;
}
lv_cache_entry_t * lv_cache_acquire_or_create(lv_cache_t * cache, const void * key, void * user_data)
{
LV_ASSERT_NULL(cache);
LV_ASSERT_NULL(key);
lv_mutex_lock(&cache->lock);
lv_cache_entry_t * entry = cache->clz->get_cb(cache, key, user_data);
if(entry != NULL) {
lv_cache_entry_acquire_data(entry);
lv_mutex_unlock(&cache->lock);
return entry;
}
entry = cache_add_internal_no_lock(cache, key, user_data);
if(entry == NULL) {
lv_mutex_unlock(&cache->lock);
return NULL;
}
bool create_res = cache->ops.create_cb(lv_cache_entry_get_data(entry), user_data);
if(create_res == false) {
cache->clz->remove_cb(cache, entry, user_data);
lv_cache_entry_delete(entry);
entry = NULL;
}
else {
lv_cache_entry_acquire_data(entry);
}
lv_mutex_unlock(&cache->lock);
return entry;
}
void lv_cache_reserve(lv_cache_t * cache, uint32_t reserved_size, void * user_data)
{
LV_ASSERT_NULL(cache);
for(lv_cache_reserve_cond_res_t reserve_cond_res = cache->clz->reserve_cond_cb(cache, NULL, reserved_size, user_data);
reserve_cond_res == LV_CACHE_RESERVE_COND_NEED_VICTIM;
reserve_cond_res = cache->clz->reserve_cond_cb(cache, NULL, reserved_size, user_data))
cache_evict_one_internal_no_lock(cache, user_data);
}
void lv_cache_drop(lv_cache_t * cache, const void * key, void * user_data)
{
LV_ASSERT_NULL(cache);
LV_ASSERT_NULL(key);
lv_mutex_lock(&cache->lock);
cache_drop_internal_no_lock(cache, key, user_data);
lv_mutex_unlock(&cache->lock);
}
bool lv_cache_evict_one(lv_cache_t * cache, void * user_data)
{
LV_ASSERT_NULL(cache);
lv_mutex_lock(&cache->lock);
bool res = cache_evict_one_internal_no_lock(cache, user_data);
lv_mutex_unlock(&cache->lock);
return res;
}
void lv_cache_drop_all(lv_cache_t * cache, void * user_data)
{
LV_ASSERT_NULL(cache);
lv_mutex_lock(&cache->lock);
cache->clz->drop_all_cb(cache, user_data);
lv_mutex_unlock(&cache->lock);
}
void lv_cache_set_max_size(lv_cache_t * cache, size_t max_size, void * user_data)
{
LV_UNUSED(user_data);
cache->max_size = max_size;
}
size_t lv_cache_get_max_size(lv_cache_t * cache, void * user_data)
{
LV_UNUSED(user_data);
return cache->max_size;
}
size_t lv_cache_get_size(lv_cache_t * cache, void * user_data)
{
LV_UNUSED(user_data);
return cache->size;
}
size_t lv_cache_get_free_size(lv_cache_t * cache, void * user_data)
{
LV_UNUSED(user_data);
return cache->max_size - cache->size;
}
void lv_cache_set_compare_cb(lv_cache_t * cache, lv_cache_compare_cb_t compare_cb, void * user_data)
{
LV_UNUSED(user_data);
cache->ops.compare_cb = compare_cb;
}
void lv_cache_set_create_cb(lv_cache_t * cache, lv_cache_create_cb_t alloc_cb, void * user_data)
{
LV_UNUSED(user_data);
cache->ops.create_cb = alloc_cb;
}
void lv_cache_set_free_cb(lv_cache_t * cache, lv_cache_free_cb_t free_cb, void * user_data)
{
LV_UNUSED(user_data);
cache->ops.free_cb = free_cb;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void cache_drop_internal_no_lock(lv_cache_t * cache, const void * key, void * user_data)
{
lv_cache_entry_t * entry = cache->clz->get_cb(cache, key, user_data);
if(entry == NULL) {
return;
}
if(lv_cache_entry_get_ref(entry) == 0) {
cache->clz->remove_cb(cache, entry, user_data);
cache->ops.free_cb(lv_cache_entry_get_data(entry), user_data);
lv_cache_entry_delete(entry);
}
else {
lv_cache_entry_set_invalid(entry, true);
cache->clz->remove_cb(cache, entry, user_data);
}
}
static bool cache_evict_one_internal_no_lock(lv_cache_t * cache, void * user_data)
{
lv_cache_entry_t * victim = cache->clz->get_victim_cb(cache, user_data);
if(victim == NULL) {
LV_LOG_ERROR("No victim found");
return false;
}
cache->clz->remove_cb(cache, victim, user_data);
cache->ops.free_cb(lv_cache_entry_get_data(victim), user_data);
lv_cache_entry_delete(victim);
return true;
}
static lv_cache_entry_t * cache_add_internal_no_lock(lv_cache_t * cache, const void * key, void * user_data)
{
lv_cache_reserve_cond_res_t reserve_cond_res = cache->clz->reserve_cond_cb(cache, key, 0, user_data);
if(reserve_cond_res == LV_CACHE_RESERVE_COND_TOO_LARGE) {
LV_LOG_ERROR("data %p is too large that exceeds max size (%" LV_PRIu32 ")", key, cache->max_size);
return NULL;
}
for(; reserve_cond_res == LV_CACHE_RESERVE_COND_NEED_VICTIM;
reserve_cond_res = cache->clz->reserve_cond_cb(cache, key, 0, user_data))
if(cache_evict_one_internal_no_lock(cache, user_data) == false)
return NULL;
lv_cache_entry_t * entry = cache->clz->add_cb(cache, key, user_data);
return entry;
}
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