refactor(log): replace the tag uncached list with standard SLIST.
NOTE: split the header modify outside.
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28c4ba1288
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1 changed files with 10 additions and 21 deletions
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@ -13,7 +13,7 @@
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// limitations under the License.
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/*
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* Log library — implementation notes.
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* Log library â€implementation notes.
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*
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* Log library stores all tags provided to esp_log_level_set as a linked
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* list. See uncached_tag_entry_t structure.
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@ -53,6 +53,7 @@
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#include <stdio.h>
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#include <assert.h>
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#include "esp_log.h"
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#include "rom/queue.h"
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//print number of bytes per line for esp_log_buffer_char and esp_log_buffer_hex
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#define BYTES_PER_LINE 16
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@ -76,14 +77,13 @@ typedef struct {
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} cached_tag_entry_t;
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typedef struct uncached_tag_entry_{
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struct uncached_tag_entry_* next;
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SLIST_ENTRY(uncached_tag_entry_) entries;
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uint8_t level; // esp_log_level_t as uint8_t
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char tag[0]; // beginning of a zero-terminated string
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} uncached_tag_entry_t;
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static esp_log_level_t s_log_default_level = ESP_LOG_VERBOSE;
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static uncached_tag_entry_t* s_log_tags_head = NULL;
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static uncached_tag_entry_t* s_log_tags_tail = NULL;
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static SLIST_HEAD(log_tags_head , uncached_tag_entry_) s_log_tags = SLIST_HEAD_INITIALIZER(s_log_tags);
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static cached_tag_entry_t s_log_cache[TAG_CACHE_SIZE];
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static uint32_t s_log_cache_max_generation = 0;
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static uint32_t s_log_cache_entry_count = 0;
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@ -122,41 +122,29 @@ void esp_log_level_set(const char* tag, esp_log_level_t level)
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return;
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}
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// allocate new linked list entry and append it to the endo of the list
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// allocate new linked list entry and append it to the head of the list
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size_t entry_size = offsetof(uncached_tag_entry_t, tag) + strlen(tag) + 1;
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uncached_tag_entry_t* new_entry = (uncached_tag_entry_t*) malloc(entry_size);
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if (!new_entry) {
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xSemaphoreGive(s_log_mutex);
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return;
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}
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new_entry->next = NULL;
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new_entry->level = (uint8_t) level;
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strcpy(new_entry->tag, tag);
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if (s_log_tags_tail) {
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s_log_tags_tail->next = new_entry;
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}
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s_log_tags_tail = new_entry;
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if (!s_log_tags_head) {
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s_log_tags_head = new_entry;
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}
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SLIST_INSERT_HEAD( &s_log_tags, new_entry, entries );
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xSemaphoreGive(s_log_mutex);
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}
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void clear_log_level_list()
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{
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for (uncached_tag_entry_t* it = s_log_tags_head; it != NULL; ) {
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uncached_tag_entry_t* next = it->next;
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free(it);
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it = next;
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while( !SLIST_EMPTY(&s_log_tags)) {
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SLIST_REMOVE_HEAD(&s_log_tags, entries );
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}
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s_log_tags_tail = NULL;
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s_log_tags_head = NULL;
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s_log_cache_entry_count = 0;
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s_log_cache_max_generation = 0;
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#ifdef LOG_BUILTIN_CHECKS
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s_log_cache_misses = 0;
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#endif
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}
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void IRAM_ATTR esp_log_write(esp_log_level_t level,
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@ -253,7 +241,8 @@ static inline bool get_uncached_log_level(const char* tag, esp_log_level_t* leve
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{
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// Walk the linked list of all tags and see if given tag is present in the list.
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// This is slow because tags are compared as strings.
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for (uncached_tag_entry_t* it = s_log_tags_head; it != NULL; it = it->next) {
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uncached_tag_entry_t *it;
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SLIST_FOREACH( it, &s_log_tags, entries ) {
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if (strcmp(tag, it->tag) == 0) {
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*level = it->level;
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return true;
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