/******************************************************************************
**函数名称: slot_creat
**功 能: 创建内存池
**输入参数:
** num: 内存块数
** size: 内存块大小
**输出参数: NONE
**返 回: 内存池对象
**实现描述:
**注意事项:
**作 者: # Qifeng.zou # 2015.05.05 #
******************************************************************************/
slot_t *slot_creat(int num, size_t size)
{
int i;
slot_t *slot;
void *addr, *ptr;
/* > 创建对象 */
slot = (slot_t *)calloc(1, sizeof(slot_t));
if (NULL == slot) {
return NULL;
}
slot->max = num;
slot->size = size;
slot->ring = ring_creat(num);
if (NULL == slot->ring) {
free(slot);
return NULL;
}
/* > 申请内存池空间 */
addr = (void *)calloc(num, size);
if (NULL == addr) {
ring_destroy(slot->ring);
free(slot);
return NULL;
}
/* > 插入管理队列 */
ptr = addr;
for (i=0; i<num; ++i, ptr += size) {
if (ring_push(slot->ring, ptr)) {
ring_destroy(slot->ring);
free(slot);
free(addr);
return NULL;
}
}
return slot;
}
int
main()
{
//set buffer size as 5, first push 3 elements, and then pop 2 elements, then push 6 elements, at last pop 12 elements
const int buffer_size = 5;
int push_size_1 = 3;
int pop_size_1 = 2;
int push_size_2 = 6;
int pop_size_2 = 12;
void* data[buffer_size];
void* pop_data;
struct ring* ring_buffer = ring_create( buffer_size );
int i;
for( i = 0; i < push_size_1 ; i++){
data[i] = malloc(sizeof(int));
int err = ring_push(ring_buffer, &data[i]);
if ( err == 0 ){
printf("push data %d = %d \n", i, &data[i]);
}
else{
printf("push %d failed \n ", i);
}
}
for( i = 0; i < pop_size_1 ; i++){
pop_data = ring_pop(ring_buffer);
if(pop_data == NULL){
printf("pop %d failed \n" , i);
}
else{
printf("pop data %d = %d\n", i, pop_data);
}
}
for( i = 0; i < push_size_2 ; i++){
data[i] = malloc(sizeof(int));
int err = ring_push(ring_buffer, &data[i]);
if ( err == 0 ){
printf("push data %d = %d \n", i, &data[i]);
}
else{
printf("push %d failed \n ", i);
}
}
for( i = 0; i < pop_size_2 ; i++){
pop_data = ring_pop(ring_buffer);
if(pop_data == NULL){
printf("pop %d failed \n" , i);
}
else{
printf("pop data %d = %d\n", i, pop_data);
}
}
return 0;
}
/* ------------------------------------------------------------------
* Push a character onto the tx buffer
* ------------------------------------------------------------------ */
void uart_tx_push(uint8_t data) {
ring_push(&tx, data);
UART_CONTROL_STATUS_REG_B |= MASK(UART_DATA_REGISTER_EMPTY_INTERRUPT_ENABLE);
}
