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/*
* Copyright © 2015 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "private.h"
int
anv_vector_init(struct anv_vector *vector, uint32_t element_size, uint32_t size)
{
assert(is_power_of_two(size));
assert(element_size < size && is_power_of_two(element_size));
vector->head = 0;
vector->tail = 0;
vector->element_size = element_size;
vector->size = size;
vector->data = malloc(size);
return vector->data != NULL;
}
void *
anv_vector_add(struct anv_vector *vector)
{
uint32_t offset, size, split, tail;
void *data;
if (vector->head - vector->tail == vector->size) {
size = vector->size * 2;
data = malloc(size);
if (data == NULL)
return NULL;
split = ALIGN_U32(vector->tail, vector->size);
tail = vector->tail & (vector->size - 1);
if (vector->head - split < vector->size) {
memcpy(data + tail,
vector->data + tail,
split - vector->tail);
memcpy(data + vector->size,
vector->data, vector->head - split);
} else {
memcpy(data + tail,
vector->data + tail,
vector->head - vector->tail);
}
free(vector->data);
vector->data = data;
vector->size = size;
}
assert(vector->head - vector->tail < vector->size);
offset = vector->head & (vector->size - 1);
vector->head += vector->element_size;
return vector->data + offset;
}
void *
anv_vector_remove(struct anv_vector *vector)
{
uint32_t offset;
if (vector->head == vector->tail)
return NULL;
assert(vector->head - vector->tail <= vector->size);
offset = vector->tail & (vector->size - 1);
vector->tail += vector->element_size;
return vector->data + offset;
}
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