107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include "lingxin_cbuffer.h"
|
||
#include "lingxin_log.h"
|
||
#include "lingxin_memory.h"
|
||
|
||
// 初始化循环缓冲区
|
||
LingxinCircularBuffer* lingxin_cbuffer_init(int size, size_t item_size) {
|
||
LingxinCircularBuffer* cb = lingxin_malloc(sizeof(LingxinCircularBuffer));
|
||
if (cb == NULL) {
|
||
lingxin_log_error("Error: cbuffer结构体内存malloc失败");
|
||
return NULL;
|
||
}
|
||
cb->buffer = lingxin_malloc(size * item_size);
|
||
if (cb->buffer == NULL) {
|
||
lingxin_log_error("Error: cbuffer->buffer内存malloc失败");
|
||
lingxin_free(cb);
|
||
return NULL;
|
||
}
|
||
cb->max = size;
|
||
cb->head = 0;
|
||
cb->tail = 0;
|
||
cb->full = 0;
|
||
cb->item_size = item_size;
|
||
return cb;
|
||
}
|
||
|
||
// 销毁循环缓冲区
|
||
void lingxin_cbuffer_free(LingxinCircularBuffer *cb) {
|
||
if (cb == NULL) {
|
||
lingxin_log_warn("Warning: cbuffer为NULL，无需销毁");
|
||
return;
|
||
}
|
||
if (cb->buffer != NULL) {
|
||
lingxin_free(cb->buffer);
|
||
}
|
||
lingxin_free(cb);
|
||
}
|
||
|
||
// 向循环缓冲区添加一个元素
|
||
void lingxin_cbuffer_put(LingxinCircularBuffer *cb, const void *item) {
|
||
|
||
memcpy((char*)cb->buffer + cb->head * cb->item_size, item, cb->item_size);
|
||
|
||
if (cb->full) {
|
||
cb->tail = (cb->tail + 1) % cb->max;
|
||
}
|
||
|
||
cb->head = (cb->head + 1) % cb->max;
|
||
cb->full = (cb->head == cb->tail);
|
||
}
|
||
|
||
// 从循环缓冲区读取一个元素
|
||
int lingxin_cbuffer_get(LingxinCircularBuffer *cb, void *item) {
|
||
int success = 0;
|
||
|
||
if (!cb->full && cb->head == cb->tail) {
|
||
success = -1; // 缓冲区为空
|
||
} else {
|
||
memcpy(item, (char*)cb->buffer + cb->tail * cb->item_size, cb->item_size);
|
||
cb->full = 0;
|
||
cb->tail = (cb->tail + 1) % cb->max;
|
||
success = 0;
|
||
}
|
||
return success;
|
||
}
|
||
|
||
// 检查缓冲区是否为空
|
||
int lingxin_cbuffer_empty(LingxinCircularBuffer *cb) {
|
||
int empty = (!cb->full && (cb->head == cb->tail));
|
||
return empty;
|
||
}
|
||
|
||
// 检查缓冲区是否已满
|
||
int lingxin_cbuffer_full(LingxinCircularBuffer *cb) {
|
||
int full = cb->full;
|
||
return full;
|
||
}
|
||
|
||
// 获取缓冲区中的元素数量
|
||
int lingxin_cbuffer_size(LingxinCircularBuffer *cb) {
|
||
int size = cb->max;
|
||
|
||
if (!cb->full) {
|
||
if (cb->head >= cb->tail) {
|
||
size = cb->head - cb->tail;
|
||
} else {
|
||
size = cb->max + cb->head - cb->tail;
|
||
}
|
||
}
|
||
|
||
return size;
|
||
}
|
||
|
||
// 重置循环缓冲区
|
||
int lingxin_cbuffer_reset(LingxinCircularBuffer *cb) {
|
||
if (cb == NULL) {
|
||
lingxin_log_error("Warning: cbuffer为NULL，无法重置");
|
||
return -1;
|
||
}
|
||
cb->head = 0;
|
||
cb->tail = 0;
|
||
cb->full = 0;
|
||
return 0;
|
||
}
|