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/*
* Copyright © 2012 Intel Corporation
*
* 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 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, see <http://www.gnu.org/licenses/>.
*
* Author: Benjamin Segovia <benjamin.segovia@intel.com>
*/
#include "cl_context.h"
#include "cl_sampler.h"
#include "cl_utils.h"
#include "cl_alloc.h"
#include "cl_khr_icd.h"
#include "cl_kernel.h"
#include <assert.h>
uint32_t cl_to_clk(cl_bool normalized_coords,
cl_addressing_mode address,
cl_filter_mode filter)
{
int clk_address = CLK_ADDRESS_NONE;
int clk_filter = CLK_FILTER_NEAREST;
switch (address) {
case CL_ADDRESS_NONE: clk_address = CLK_ADDRESS_NONE; break;
case CL_ADDRESS_CLAMP: clk_address = CLK_ADDRESS_CLAMP; break;
case CL_ADDRESS_CLAMP_TO_EDGE: clk_address = CLK_ADDRESS_CLAMP_TO_EDGE; break;
case CL_ADDRESS_REPEAT: clk_address = CLK_ADDRESS_REPEAT; break;
case CL_ADDRESS_MIRRORED_REPEAT: clk_address = CLK_ADDRESS_MIRRORED_REPEAT; break;
default:
assert(0);
}
switch(filter) {
case CL_FILTER_NEAREST: clk_filter = CLK_FILTER_NEAREST; break;
case CL_FILTER_LINEAR: clk_filter = CLK_FILTER_LINEAR; break;
default:
assert(0);
}
return (clk_address << __CLK_ADDRESS_BASE)
| (normalized_coords << __CLK_NORMALIZED_BASE)
| (clk_filter);
}
#define IS_SAMPLER_ARG(v) (v & __CLK_SAMPLER_ARG_KEY_BIT)
#define SAMPLER_ARG_ID(v) ((v & __CLK_SAMPLER_ARG_MASK) >> __CLK_SAMPLER_ARG_BASE)
int cl_set_sampler_arg_slot(cl_kernel k, int index, cl_sampler sampler)
{
int slot_id;
for(slot_id = 0; slot_id < k->sampler_sz; slot_id++)
{
if (IS_SAMPLER_ARG(k->samplers[slot_id])) {
if (SAMPLER_ARG_ID(k->samplers[slot_id]) == index) {
k->samplers[slot_id] = (k->samplers[slot_id] & (~__CLK_SAMPLER_MASK))
| sampler->clkSamplerValue;
return slot_id;
}
}
}
return -1;
}
LOCAL cl_sampler
cl_sampler_new(cl_context ctx,
cl_bool normalized_coords,
cl_addressing_mode address,
cl_filter_mode filter,
cl_int *errcode_ret)
{
cl_sampler sampler = NULL;
cl_int err = CL_SUCCESS;
/* Allocate and inialize the structure itself */
TRY_ALLOC (sampler, CALLOC(struct _cl_sampler));
SET_ICD(sampler->dispatch)
sampler->ref_n = 1;
sampler->magic = CL_MAGIC_SAMPLER_HEADER;
sampler->normalized_coords = normalized_coords;
sampler->address = address;
sampler->filter = filter;
/* Append the sampler in the context sampler list */
pthread_mutex_lock(&ctx->sampler_lock);
sampler->next = ctx->samplers;
if (ctx->samplers != NULL)
ctx->samplers->prev = sampler;
ctx->samplers = sampler;
pthread_mutex_unlock(&ctx->sampler_lock);
sampler->ctx = ctx;
cl_context_add_ref(ctx);
sampler->clkSamplerValue = cl_to_clk(normalized_coords, address, filter);
exit:
if (errcode_ret)
*errcode_ret = err;
return sampler;
error:
cl_sampler_delete(sampler);
sampler = NULL;
goto exit;
}
LOCAL void
cl_sampler_delete(cl_sampler sampler)
{
if (UNLIKELY(sampler == NULL))
return;
if (atomic_dec(&sampler->ref_n) > 1)
return;
assert(sampler->ctx);
pthread_mutex_lock(&sampler->ctx->sampler_lock);
if (sampler->prev)
sampler->prev->next = sampler->next;
if (sampler->next)
sampler->next->prev = sampler->prev;
if (sampler->ctx->samplers == sampler)
sampler->ctx->samplers = sampler->next;
pthread_mutex_unlock(&sampler->ctx->sampler_lock);
cl_context_delete(sampler->ctx);
cl_free(sampler);
}
LOCAL void
cl_sampler_add_ref(cl_sampler sampler)
{
assert(sampler);
atomic_inc(&sampler->ref_n);
}
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