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* Copyright (c) 2018 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <kernel_structs.h>
#include "wrapper.h"
#define TIME_OUT_TICKS 10
K_MEM_SLAB_DEFINE(cv2_mem_slab, sizeof(struct cv2_mslab),
CONFIG_CMSIS_V2_MEM_SLAB_MAX_COUNT, 4);
static const osMemoryPoolAttr_t init_mslab_attrs = {
.name = "ZephyrMemPool",
.attr_bits = 0,
.cb_mem = NULL,
.cb_size = 0,
.mp_mem = NULL,
.mp_size = 0,
};
/**
* @brief Create and Initialize a memory pool.
*/
osMemoryPoolId_t osMemoryPoolNew(uint32_t block_count, uint32_t block_size,
const osMemoryPoolAttr_t *attr)
{
struct cv2_mslab *mslab;
BUILD_ASSERT_MSG(CONFIG_HEAP_MEM_POOL_SIZE >=
CONFIG_CMSIS_V2_MEM_SLAB_MAX_DYNAMIC_SIZE,
"heap must be configured to be at least the max dynamic size");
if (k_is_in_isr()) {
return NULL;
}
if ((attr != NULL) && (attr->mp_size < block_count * block_size)) {
return NULL;
}
if (attr == NULL) {
attr = &init_mslab_attrs;
}
if (k_mem_slab_alloc(&cv2_mem_slab, (void **)&mslab, 100) == 0) {
(void)memset(mslab, 0, sizeof(struct cv2_mslab));
} else {
return NULL;
}
if (attr->mp_mem == NULL) {
__ASSERT((block_count * block_size) <=
CONFIG_CMSIS_V2_MEM_SLAB_MAX_DYNAMIC_SIZE,
"memory slab/pool size exceeds dynamic maximum");
mslab->pool = k_calloc(block_count, block_size);
if (mslab->pool == NULL) {
k_mem_slab_free(&cv2_mem_slab, (void *) &mslab);
return NULL;
}
mslab->is_dynamic_allocation = TRUE;
} else {
mslab->pool = attr->mp_mem;
mslab->is_dynamic_allocation = FALSE;
}
k_mem_slab_init(&mslab->z_mslab, mslab->pool, block_size, block_count);
if (attr->name == NULL) {
strncpy(mslab->name, init_mslab_attrs.name,
sizeof(mslab->name) - 1);
} else {
strncpy(mslab->name, attr->name, sizeof(mslab->name) - 1);
}
return (osMemoryPoolId_t)mslab;
}
/**
* @brief Allocate a memory block from a memory pool.
*/
void *osMemoryPoolAlloc(osMemoryPoolId_t mp_id, uint32_t timeout)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
int retval;
void *ptr;
if (mslab == NULL) {
return NULL;
}
/* Can be called from ISRs only if timeout is set to 0 */
if (timeout > 0 && k_is_in_isr()) {
return NULL;
}
if (timeout == 0U) {
retval = k_mem_slab_alloc(
(struct k_mem_slab *)(&mslab->z_mslab),
(void **)&ptr, K_NO_WAIT);
} else if (timeout == osWaitForever) {
retval = k_mem_slab_alloc(
(struct k_mem_slab *)(&mslab->z_mslab),
(void **)&ptr, K_FOREVER);
} else {
retval = k_mem_slab_alloc(
(struct k_mem_slab *)(&mslab->z_mslab),
(void **)&ptr, __ticks_to_ms(timeout));
}
if (retval == 0) {
return ptr;
} else {
return NULL;
}
}
/**
* @brief Return an allocated memory block back to a specific memory pool.
*/
osStatus_t osMemoryPoolFree(osMemoryPoolId_t mp_id, void *block)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
if (mslab == NULL) {
return osErrorParameter;
}
/* Note: Below error code is not supported.
* osErrorResource: the memory pool specified by parameter mp_id
* is in an invalid memory pool state.
*/
k_mem_slab_free((struct k_mem_slab *)(&mslab->z_mslab), (void *)&block);
return osOK;
}
/**
* @brief Get name of a Memory Pool object.
*/
const char *osMemoryPoolGetName(osMemoryPoolId_t mp_id)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
if (!k_is_in_isr() && (mslab != NULL)) {
return mslab->name;
} else {
return NULL;
}
}
/**
* @brief Get maximum number of memory blocks in a Memory Pool.
*/
uint32_t osMemoryPoolGetCapacity(osMemoryPoolId_t mp_id)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
if (mslab == NULL) {
return 0;
} else {
return mslab->z_mslab.num_blocks;
}
}
/**
* @brief Get memory block size in a Memory Pool.
*/
uint32_t osMemoryPoolGetBlockSize(osMemoryPoolId_t mp_id)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
if (mslab == NULL) {
return 0;
} else {
return mslab->z_mslab.block_size;
}
}
/**
* @brief Get number of memory blocks used in a Memory Pool.
*/
uint32_t osMemoryPoolGetCount(osMemoryPoolId_t mp_id)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
if (mslab == NULL) {
return 0;
} else {
return k_mem_slab_num_used_get(&mslab->z_mslab);
}
}
/**
* @brief Get number of memory blocks available in a Memory Pool.
*/
uint32_t osMemoryPoolGetSpace(osMemoryPoolId_t mp_id)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
if (mslab == NULL) {
return 0;
} else {
return k_mem_slab_num_free_get(&mslab->z_mslab);
}
}
/**
* @brief Delete a Memory Pool object.
*/
osStatus_t osMemoryPoolDelete(osMemoryPoolId_t mp_id)
{
struct cv2_mslab *mslab = (struct cv2_mslab *)mp_id;
if (mslab == NULL) {
return osErrorParameter;
}
if (k_is_in_isr()) {
return osErrorISR;
}
/* The status code "osErrorResource" (the memory pool specified by
* parameter mp_id is in an invalid memory pool state) is not
* supported in Zephyr.
*/
if (mslab->is_dynamic_allocation) {
k_free(mslab->pool);
}
k_mem_slab_free(&cv2_mem_slab, (void *)&mslab);
return osOK;
}
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