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/*
* Copyright (c) 2024, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "chry_mempool.h"
/*****************************************************************************
* @brief init ringbuffer
*
* @param[in] rb ringbuffer instance
* @param[in] pool memory pool address
* @param[in] size memory size in byte,
* must be power of 2 !!!
*
* @retval int 0:Success -1:Error
*****************************************************************************/
static int __chry_ringbuffer_init(chry_mempool_ringbuffer_t *rb, void *pool, uint32_t size)
{
if (NULL == rb) {
return -1;
}
if (NULL == pool) {
return -1;
}
if ((size < 2) || (size & (size - 1))) {
return -1;
}
rb->in = 0;
rb->out = 0;
rb->mask = size - 1;
rb->pool = pool;
return 0;
}
/*****************************************************************************
* @brief reset ringbuffer, clean all data,
* should be add lock in multithread
*
* @param[in] rb ringbuffer instance
*
*****************************************************************************/
static void __chry_ringbuffer_reset(chry_mempool_ringbuffer_t *rb)
{
rb->in = 0;
rb->out = 0;
}
/*****************************************************************************
* @brief write data to ringbuffer,
* should be add lock in multithread,
* in single write thread not need lock
*
* @param[in] rb ringbuffer instance
* @param[in] data data pointer
* @param[in] size size in byte
*
* @retval uint32_t actual write size in byte
*****************************************************************************/
static uint32_t __chry_ringbuffer_write(chry_mempool_ringbuffer_t *rb, void *data, uint32_t size)
{
uint32_t unused;
uint32_t offset;
uint32_t remain;
unused = (rb->mask + 1) - (rb->in - rb->out);
if (size > unused) {
size = unused;
}
offset = rb->in & rb->mask;
remain = rb->mask + 1 - offset;
remain = remain > size ? size : remain;
memcpy(((uint8_t *)(rb->pool)) + offset, data, remain);
memcpy(rb->pool, (uint8_t *)data + remain, size - remain);
rb->in += size;
return size;
}
/*****************************************************************************
* @brief peek data from ringbuffer
* should be add lock in multithread,
* in single read thread not need lock
*
* @param[in] rb ringbuffer instance
* @param[in] data data pointer
* @param[in] size size in byte
*
* @retval uint32_t actual peek size in byte
*****************************************************************************/
static uint32_t __chry_ringbuffer_peek(chry_mempool_ringbuffer_t *rb, void *data, uint32_t size)
{
uint32_t used;
uint32_t offset;
uint32_t remain;
used = rb->in - rb->out;
if (size > used) {
size = used;
}
offset = rb->out & rb->mask;
remain = rb->mask + 1 - offset;
remain = remain > size ? size : remain;
memcpy(data, ((uint8_t *)(rb->pool)) + offset, remain);
memcpy((uint8_t *)data + remain, rb->pool, size - remain);
return size;
}
/*****************************************************************************
* @brief read data from ringbuffer
* should be add lock in multithread,
* in single read thread not need lock
*
* @param[in] rb ringbuffer instance
* @param[in] data data pointer
* @param[in] size size in byte
*
* @retval uint32_t actual read size in byte
*****************************************************************************/
static uint32_t __chry_ringbuffer_read(chry_mempool_ringbuffer_t *rb, void *data, uint32_t size)
{
size = __chry_ringbuffer_peek(rb, data, size);
rb->out += size;
return size;
}
int chry_mempool_create(struct chry_mempool *pool, void *block, uint32_t block_size, uint32_t block_count)
{
uintptr_t *item;
if (block_count > CONFIG_CHRY_MEMPOOL_MAX_BLOCK_COUNT) {
return -1;
}
if (pool->block_size % 4) {
return -1;
}
if (__chry_ringbuffer_init(&pool->in, pool->in_buf, sizeof(uintptr_t) * block_count) == -1) {
return -1;
}
if (__chry_ringbuffer_init(&pool->out, pool->out_buf, sizeof(uintptr_t) * block_count) == -1) {
return -1;
}
pool->out_sem = chry_mempool_osal_sem_create(block_count);
if (pool->out_sem == NULL) {
return -1;
}
pool->block = block;
pool->block_size = block_size;
pool->block_count = block_count;
for (uint32_t i = 0; i < pool->block_count; i++) {
item = (uintptr_t *)((uint8_t *)pool->block + i * pool->block_size);
chry_mempool_free(pool, item);
}
return 0;
}
void chry_mempool_delete(struct chry_mempool *pool)
{
chry_mempool_osal_sem_delete(pool->out_sem);
__chry_ringbuffer_reset(&pool->in);
__chry_ringbuffer_reset(&pool->out);
}
uintptr_t *chry_mempool_alloc(struct chry_mempool *pool)
{
uintptr_t *addr;
uint32_t len;
len = __chry_ringbuffer_read(&pool->in, (uintptr_t *)&addr, sizeof(uintptr_t));
if (len == 0) {
return NULL;
} else {
return addr;
}
}
int chry_mempool_free(struct chry_mempool *pool, uintptr_t *item)
{
uintptr_t addr;
addr = (uintptr_t)item;
return __chry_ringbuffer_write(&pool->in, &addr, sizeof(uintptr_t));
}
int chry_mempool_send(struct chry_mempool *pool, uintptr_t *item)
{
uintptr_t addr;
addr = (uintptr_t)item;
__chry_ringbuffer_write(&pool->out, &addr, sizeof(uintptr_t));
return chry_mempool_osal_sem_give(pool->out_sem);
}
int chry_mempool_recv(struct chry_mempool *pool, uintptr_t **item, uint32_t timeout)
{
uint32_t len;
int ret;
ret = chry_mempool_osal_sem_take(pool->out_sem, timeout);
if (ret < 0) {
return -1;
}
len = __chry_ringbuffer_read(&pool->out, (uintptr_t *)item, sizeof(uintptr_t));
if (len == 0) {
return -1;
} else {
return 0;
}
}
void chry_mempool_reset(struct chry_mempool *pool)
{
uintptr_t *item;
__chry_ringbuffer_reset(&pool->in);
__chry_ringbuffer_reset(&pool->out);
for (uint32_t i = 0; i < pool->block_count; i++) {
item = (uintptr_t *)((uint8_t *)pool->block + i * pool->block_size);
chry_mempool_free(pool, item);
}
}
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