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/*
* Copyright (c) 2013-2014 Jens Kuske <jenskuske@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include "vdpau_private.h"
#define INITIAL_SIZE 16
static struct
{
void **data;
size_t size;
pthread_rwlock_t lock;
} ht = { .lock = PTHREAD_RWLOCK_INITIALIZER };
void *handle_create(size_t size, VdpHandle *handle)
{
*handle = VDP_INVALID_HANDLE;
if (pthread_rwlock_wrlock(&ht.lock))
return NULL;
unsigned int index;
void *data = NULL;
for (index = 0; index < ht.size; index++)
if (ht.data[index] == NULL)
break;
if (index >= ht.size)
{
int new_size = ht.size ? ht.size * 2 : INITIAL_SIZE;
void **new_data = realloc(ht.data, new_size * sizeof(void *));
if (!new_data)
goto out;
memset(new_data + ht.size, 0, (new_size - ht.size) * sizeof(void *));
ht.data = new_data;
ht.size = new_size;
}
data = calloc(1, size);
if (!data)
goto out;
ht.data[index] = data;
*handle = index + 1;
out:
pthread_rwlock_unlock(&ht.lock);
return data;
}
void *handle_get(VdpHandle handle)
{
if (handle == VDP_INVALID_HANDLE)
return NULL;
if (pthread_rwlock_rdlock(&ht.lock))
return NULL;
unsigned int index = handle - 1;
void *data = NULL;
if (index < ht.size)
data = ht.data[index];
pthread_rwlock_unlock(&ht.lock);
return data;
}
void handle_destroy(VdpHandle handle)
{
if (pthread_rwlock_wrlock(&ht.lock))
return;
unsigned int index = handle - 1;
if (index < ht.size)
{
free(ht.data[index]);
ht.data[index] = NULL;
}
pthread_rwlock_unlock(&ht.lock);
}
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