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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include "bh_vector.h"
static uint8 *
alloc_vector_data(size_t length, size_t size_elem)
{
uint64 total_size = ((uint64)size_elem) * length;
uint8 *data;
if (length > UINT32_MAX || size_elem > UINT32_MAX
|| total_size > UINT32_MAX) {
return NULL;
}
if ((data = BH_MALLOC((uint32)total_size))) {
memset(data, 0, (uint32)total_size);
}
return data;
}
/**
* every caller of `extend_vector` must provide
* a thread-safe environment.
*/
static bool
extend_vector(Vector *vector, size_t length)
{
uint8 *data;
if (length <= vector->max_elems)
return true;
if (length < vector->size_elem * 3 / 2)
length = vector->size_elem * 3 / 2;
if (!(data = alloc_vector_data(length, vector->size_elem))) {
return false;
}
bh_memcpy_s(data, (uint32)(vector->size_elem * length), vector->data,
(uint32)(vector->size_elem * vector->max_elems));
BH_FREE(vector->data);
vector->data = data;
vector->max_elems = length;
return true;
}
bool
bh_vector_init(Vector *vector, size_t init_length, size_t size_elem,
bool use_lock)
{
if (!vector) {
LOG_ERROR("Init vector failed: vector is NULL.\n");
return false;
}
if (init_length == 0) {
init_length = 4;
}
if (!(vector->data = alloc_vector_data(init_length, size_elem))) {
LOG_ERROR("Init vector failed: alloc memory failed.\n");
return false;
}
vector->size_elem = size_elem;
vector->max_elems = init_length;
vector->num_elems = 0;
vector->lock = NULL;
if (use_lock) {
if (!(vector->lock = BH_MALLOC(sizeof(korp_mutex)))) {
LOG_ERROR("Init vector failed: alloc locker failed.\n");
bh_vector_destroy(vector);
return false;
}
if (BHT_OK != os_mutex_init(vector->lock)) {
LOG_ERROR("Init vector failed: init locker failed.\n");
BH_FREE(vector->lock);
vector->lock = NULL;
bh_vector_destroy(vector);
return false;
}
}
return true;
}
bool
bh_vector_set(Vector *vector, uint32 index, const void *elem_buf)
{
if (!vector || !elem_buf) {
LOG_ERROR("Set vector elem failed: vector or elem buf is NULL.\n");
return false;
}
if (index >= vector->num_elems) {
LOG_ERROR("Set vector elem failed: invalid elem index.\n");
return false;
}
if (vector->lock)
os_mutex_lock(vector->lock);
bh_memcpy_s(vector->data + vector->size_elem * index,
(uint32)vector->size_elem, elem_buf, (uint32)vector->size_elem);
if (vector->lock)
os_mutex_unlock(vector->lock);
return true;
}
bool
bh_vector_get(Vector *vector, uint32 index, void *elem_buf)
{
if (!vector || !elem_buf) {
LOG_ERROR("Get vector elem failed: vector or elem buf is NULL.\n");
return false;
}
if (index >= vector->num_elems) {
LOG_ERROR("Get vector elem failed: invalid elem index.\n");
return false;
}
if (vector->lock)
os_mutex_lock(vector->lock);
bh_memcpy_s(elem_buf, (uint32)vector->size_elem,
vector->data + vector->size_elem * index,
(uint32)vector->size_elem);
if (vector->lock)
os_mutex_unlock(vector->lock);
return true;
}
bool
bh_vector_insert(Vector *vector, uint32 index, const void *elem_buf)
{
size_t i;
uint8 *p;
bool ret = false;
if (!vector || !elem_buf) {
LOG_ERROR("Insert vector elem failed: vector or elem buf is NULL.\n");
goto just_return;
}
if (index >= vector->num_elems) {
LOG_ERROR("Insert vector elem failed: invalid elem index.\n");
goto just_return;
}
if (vector->lock)
os_mutex_lock(vector->lock);
if (!extend_vector(vector, vector->num_elems + 1)) {
LOG_ERROR("Insert vector elem failed: extend vector failed.\n");
goto unlock_return;
}
p = vector->data + vector->size_elem * vector->num_elems;
for (i = vector->num_elems - 1; i > index; i--) {
bh_memcpy_s(p, (uint32)vector->size_elem, p - vector->size_elem,
(uint32)vector->size_elem);
p -= vector->size_elem;
}
bh_memcpy_s(p, (uint32)vector->size_elem, elem_buf,
(uint32)vector->size_elem);
vector->num_elems++;
ret = true;
unlock_return:
if (vector->lock)
os_mutex_unlock(vector->lock);
just_return:
return ret;
}
bool
bh_vector_append(Vector *vector, const void *elem_buf)
{
bool ret = false;
if (!vector || !elem_buf) {
LOG_ERROR("Append vector elem failed: vector or elem buf is NULL.\n");
goto just_return;
}
/* make sure one more slot is used by the thread who allocas it */
if (vector->lock)
os_mutex_lock(vector->lock);
if (!extend_vector(vector, vector->num_elems + 1)) {
LOG_ERROR("Append ector elem failed: extend vector failed.\n");
goto unlock_return;
}
bh_memcpy_s(vector->data + vector->size_elem * vector->num_elems,
(uint32)vector->size_elem, elem_buf, (uint32)vector->size_elem);
vector->num_elems++;
ret = true;
unlock_return:
if (vector->lock)
os_mutex_unlock(vector->lock);
just_return:
return ret;
}
bool
bh_vector_remove(Vector *vector, uint32 index, void *old_elem_buf)
{
uint32 i;
uint8 *p;
if (!vector) {
LOG_ERROR("Remove vector elem failed: vector is NULL.\n");
return false;
}
if (index >= vector->num_elems) {
LOG_ERROR("Remove vector elem failed: invalid elem index.\n");
return false;
}
if (vector->lock)
os_mutex_lock(vector->lock);
p = vector->data + vector->size_elem * index;
if (old_elem_buf) {
bh_memcpy_s(old_elem_buf, (uint32)vector->size_elem, p,
(uint32)vector->size_elem);
}
for (i = index; i < vector->num_elems - 1; i++) {
bh_memcpy_s(p, (uint32)vector->size_elem, p + vector->size_elem,
(uint32)vector->size_elem);
p += vector->size_elem;
}
vector->num_elems--;
if (vector->lock)
os_mutex_unlock(vector->lock);
return true;
}
size_t
bh_vector_size(const Vector *vector)
{
return vector ? vector->num_elems : 0;
}
bool
bh_vector_destroy(Vector *vector)
{
if (!vector) {
LOG_ERROR("Destroy vector elem failed: vector is NULL.\n");
return false;
}
if (vector->data)
BH_FREE(vector->data);
if (vector->lock) {
os_mutex_destroy(vector->lock);
BH_FREE(vector->lock);
}
memset(vector, 0, sizeof(Vector));
return true;
}
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