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/**
* The OpenCL PHP extension
*
* @package php-opencl
* @author Ryusuke SEKIYAMA <rsky0711@gmail.com>
* @copyright 2012 Ryusuke SEKIYAMA
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/

#include "context.h"
#include "params.h"

#define get_info ((phpcl_get_info_func_t)_get_context_info)
#define get_info_ex NULL

/* {{{ type definitions */

typedef void (*create_context_callback_func_t)(const char *, const void *, size_t, void *);

/* }}} */
/* {{{ globals */

static const phpcl_info_param_t context_info_params[] = {
{ NULL, 0, 0 }
};

/* }}} */
/* {{{ _get_context_info() */

static cl_int _get_context_info(cl_context context,
                                void *reserved __attribute__ ((unused)),
                                cl_context_info name,
                                size_t value_size,
                                void *value,
                                size_t *value_size_ret)
{
return clGetContextInfo(context, name, value_size, value, value_size_ret);
}

/* }}} */
/* {{{ _get_context_info_all() */

static void _get_context_info_all(
INTERNAL_FUNCTION_PARAMETERS,
cl_context context)
{
const phpcl_info_param_t *param = context_info_params;
char buf[32] = {0};

array_init_size(return_value, 8);
snprintf(buf, sizeof(buf), "%p", context);
add_assoc_string(return_value, "id", buf, 1);

while (param->key != NULL) {
zval *entry = phpcl_get_info(get_info, get_info_ex,
context, NULL, param TSRMLS_CC);
if (entry) {
add_assoc_zval(return_value, param->key, entry);
} else {
add_assoc_null(return_value, param->key);
}
param++;
}
}

/* }}} */
/* {{{ _get_context_info_by_name() */

static void _get_context_info_by_name(
INTERNAL_FUNCTION_PARAMETERS,
cl_context context, cl_int name)
{
const phpcl_info_param_t *param = context_info_params;

RETVAL_NULL();

while (param->key != NULL) {
if (param->name == name) {
zval *entry = phpcl_get_info(get_info, get_info_ex,
context, NULL, param TSRMLS_CC);
if (entry) {
RETVAL_ZVAL(entry, 0, 1);
}
return;
}
param++;
}
}

/* }}} */
/* {{{ mixed cl_get_context_info(resource cl_context context[, int name]) */

PHPCL_FUNCTION(cl_get_context_info)
{
zval *zid = NULL;
cl_context context = NULL;
long name = 0;

RETVAL_FALSE;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
"r|l", &zid, &name) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(context, cl_context, &zid, -1,
"cl_context", phpcl_le_context());

if (ZEND_NUM_ARGS() == 2) {
_get_context_info_by_name(INTERNAL_FUNCTION_PARAM_PASSTHRU, context, (cl_int)name);
} else {
_get_context_info_all(INTERNAL_FUNCTION_PARAM_PASSTHRU, context);
}
}

/* }}} */
/* {{{ phpcl_context_get_devices() */

PHPCL_LOCAL cl_device_id *
phpcl_context_get_devices(cl_context context,
                          cl_uint *num_devices_ret,
                          cl_int *errcode_ret)
{
cl_int errcode = CL_SUCCESS;
cl_uint num_devices = 0;
cl_device_id *devices = NULL;

errcode = clGetContextInfo(context, CL_CONTEXT_NUM_DEVICES,
sizeof(cl_uint), &num_devices, NULL);
if (errcode != CL_SUCCESS) {
if (errcode_ret) {
*errcode_ret = errcode;
}
return NULL;
}

devices = ecalloc(num_devices, sizeof(cl_device_id));
errcode = clGetContextInfo(context, CL_CONTEXT_DEVICES,
num_devices * sizeof(cl_device_id), devices, NULL);
if (errcode != CL_SUCCESS) {
efree(devices);
if (errcode_ret) {
*errcode_ret = errcode;
}
return NULL;
}

if (num_devices_ret) {
*num_devices_ret = num_devices;
}
return devices;
}

/* }}} */
/* {{{ resource cl_context cl_create_context(mixed device[, array properties[, callback callback[, mixed userdata[, int &errcode]]]]) */

PHPCL_FUNCTION(cl_create_context)
{
cl_int errcode = CL_SUCCESS;
cl_context context = NULL;
zval *zdevices = NULL;
cl_device_id *devices = NULL;
cl_uint num_devices = 0;
zval *zproperties = NULL;
cl_context_properties *properties = NULL;
zval *zcallback = NULL;
create_context_callback_func_t notify_func = NULL;
zval *zdata = NULL;
void *userdata = NULL;
zval *zerrcode = NULL;

RETVAL_FALSE;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
"z|z!/z/z/z", &zdevices, &zproperties,
&zcallback, &zdata, &zerrcode) == FAILURE) {
return;
}

devices = phpcl_get_devicecs(zdevices, 1, &num_devices TSRMLS_CC);
if (!devices) {
return;
}

if (zproperties) {
/* TODO: support properties */
}

if (zcallback) {
if (!phpcl_is_callable(zcallback, 3 TSRMLS_CC)) {
efree(devices);
return;
}
}

phpcl_context_t *ctx = emalloc(sizeof(phpcl_context_t));
ctx->callback = NULL;
ctx->data = NULL;
if (zcallback) {
ctx->callback = zcallback;
if (zdata) {
ctx->data = zdata;
}
}

context = clCreateContext(properties, num_devices, devices,
notify_func, ctx, &errcode);

if (zerrcode) {
zval_dtor(zerrcode);
ZVAL_LONG(zerrcode, (long)errcode);
}

if (context) {
ctx->context = context;
if (zcallback) {
Z_ADDREF_P(zcallback);
if (zdata) {
Z_ADDREF_P(zdata);
}
}
ZEND_REGISTER_RESOURCE(return_value, ctx, phpcl_le_context());
} else {
efree(ctx);
}
efree(devices);
}

/* }}} */

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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