/*jslint node:true,nomen:true,vars:true,plusplus:true,white:true,unparam:true*/ /*jshint onevar:true*/

'use strict'; var weak = require('weak'); var _ = require('lodash'); var ref = require('ref'); var ArrayType = require('ref-array'); var clUtils = require('./clUtils'); var CL11 = require('./cl11'); var assert = require('assert');

function CLWrapper(cl, handle) { assert(cl instanceof CL11, 'Argument "cl" is not a CL11 instance.'); assert(ref.getType(handle) === ref.types.void, 'Argument "handle" is not a pointer.');

this.cl = cl;

this.handle = handle; this._released = false; this._cache = {}; this._infoFunction = this.cl.imports[this._classInfoFunction]; var releaseMethod = this.createReleaseMethod(); if (releaseMethod) { weak(this, releaseMethod); } } Object.defineProperties(CLWrapper.prototype, { _classInfoFunction: { get: function () { this._ni('get _classInfoFunction'); } },

version: { get: function () { return this.cl.version; } } }); CLWrapper.prototype._ni = function (method) { throw new Error('Not implemented: ' + method); }; CLWrapper.prototype._throwIfReleased = function (method) { if (this._released) { throw new Error('CL object already released.'); } }; CLWrapper.prototype._cached = function(key, f, noCache) { if (!noCache) { var value = this._cache[key]; if (!_.isUndefined(value)) { return value; } } var result = f(); if (!noCache) { this._cache[key] = result; } return result; };

CLWrapper.prototype.createReleaseMethod = function () { this._ni('createReleaseMethod'); };

CLWrapper.prototype.release = function () { if (this._released) { return; } var releaseMethod = this.createReleaseMethod(); if (releaseMethod) { releaseMethod(); } this._released = true; }; CLWrapper.prototype._getInfo = function (elemType, infoName, noCache) { return this._getInfoWith(this._infoFunction, elemType, infoName, noCache); }; CLWrapper.prototype._getInfoWith = function (infoFunction, elemType, infoName, noCache) { var self = this; return this._cached( infoName, function() { elemType = ref.coerceType(elemType); var info = ref.alloc(elemType); var err = infoFunction(self.handle, infoName, elemType.size, info, null); self.cl.checkError(err); var result = info.deref(); return result; }, noCache ); }; CLWrapper.prototype._getInfo2 = function (elemType, altFunction, device, infoName, noCache) { var self = this; return this._cached( infoName, function() { elemType = ref.coerceType(elemType); var info = ref.alloc(elemType); var err = altFunction(self.handle, clUtils.toHandle(device), infoName, elemType.size, info, null); self.cl.checkError(err); var result = info.deref(); return result; }, noCache ); }; CLWrapper.prototype._getArrayInfo = function (elemType, infoName, noCache) { var self = this; return this._cached( infoName, function() { var i; elemType = ref.coerceType(elemType); var needed = ref.alloc('size_t'); var err = self._infoFunction(self.handle, infoName, 0, null, needed); self.cl.checkError(err); var nNeeded = needed.deref(); if (nNeeded === 0) {

return null; } var elemSize = elemType.size || ref.sizeof.pointer; var bufferSize = nNeeded / elemSize; var ElemTypeArray = new ArrayType(elemType); var buffer = new ElemTypeArray(bufferSize); err = self._infoFunction(self.handle, infoName, nNeeded, buffer.buffer, null); self.cl.checkError(err); var result = []; for (i = 0; i < bufferSize; i++) { result.push(buffer[i]); } return result; }, noCache ); }; CLWrapper.prototype._getStringInfo = function (infoName, noCache) { var self = this; return this._cached( infoName, function() { var arr = self._getArrayInfo('char', infoName, true); var str = arr.filter(function(code) { return code > 0; }).map(function (code) { return String.fromCharCode(code); }).join('').trim(); return str; }, noCache ); }; CLWrapper.prototype._getArrayInfo2 = function (elemType, altFunction, device, infoName, noCache) { var self = this; return this._cached( infoName, function() { var i; var handle = clUtils.toHandle(device); elemType = ref.coerceType(elemType); var needed = ref.alloc('size_t'); var err = altFunction(self.handle, handle, infoName, 0, null, needed); self.cl.checkError(err); var nNeeded = needed.deref(); if (nNeeded === 0) {

return null; } var elemSize = elemType.size; var bufferSize = nNeeded / elemSize; var ElemTypeArray = new ArrayType(elemType); var buffer = new ElemTypeArray(bufferSize); err = altFunction(self.handle, handle, infoName, nNeeded, buffer.buffer, null); self.cl.checkError(err); var result = []; for (i = 0; i < bufferSize; i++) { result.push(buffer[i]); } return result; }, noCache ); }; CLWrapper.prototype._getStringInfo2 = function (altFunction, device, infoName, noCache) { var self = this; return this._cached( infoName, function() { var arr = self._getArrayInfo2('char', altFunction, device, infoName, true); var str = arr.filter(function(code) { return code > 0; }).map(function (code) { return String.fromCharCode(code); }).join('').trim(); return str; }, noCache ); }; module.exports = CLWrapper;