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node/lib/smalloc.js

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smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require('smalloc') to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
// Copyright Joyent, Inc. and other Node contributors.
//
// 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 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.
var smalloc = process.binding('smalloc');
var kMaxLength = smalloc.kMaxLength;
src: Replace macros with util functions
12 years ago
var util = require('util');
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require('smalloc') to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
exports.alloc = alloc;
exports.copyOnto = smalloc.copyOnto;
exports.dispose = dispose;
smalloc: check if object has external memory Add HasExternalData API to check if Object has externally allocated memory, and accompanying tests.
11 years ago
exports.hasExternalData = smalloc.hasExternalData;
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require('smalloc') to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
// don't allow kMaxLength to accidentally be overwritten. it's a lot less
// apparent when a primitive is accidentally changed.
Object.defineProperty(exports, 'kMaxLength', {
smalloc: cleanup checks/conversions * Moved the ToObject check out of smalloc::Alloc and into JS. Direct usage of that method is for internal use only and so can bypass the possible coercion. * Same has been done with smalloc::SliceOnto. * smalloc::CopyOnto will now throw if passed argument is not an object. * Remove extra TargetFreeCallback function. There was a use for it when it was working with a Local<T>, but that code has been removed making the function superfluous.
12 years ago
enumerable: true, value: kMaxLength, writable: false
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require('smalloc') to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
});
smalloc: allow different external array types smalloc.alloc now accepts an optional third argument which allows specifying the type of array that should be allocated. All available types are now located on smalloc.Types.
12 years ago
// enumerated values for different external array types
var Types = {};
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require('smalloc') to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
smalloc: update use of ExternalArrayType constants The constants in enum v8::ExternalArrayType have been changed. The old values are there for legacy reasons, but it's best to update anyway. Signed-off-by: Trevor Norris <trev.norris@gmail.com>
10 years ago
// Must match enum v8::ExternalArrayType.
smalloc: allow different external array types smalloc.alloc now accepts an optional third argument which allows specifying the type of array that should be allocated. All available types are now located on smalloc.Types.
12 years ago
Object.defineProperties(Types, {
'Int8': { enumerable: true, value: 1, writable: false },
'Uint8': { enumerable: true, value: 2, writable: false },
'Int16': { enumerable: true, value: 3, writable: false },
'Uint16': { enumerable: true, value: 4, writable: false },
'Int32': { enumerable: true, value: 5, writable: false },
'Uint32': { enumerable: true, value: 6, writable: false },
'Float': { enumerable: true, value: 7, writable: false },
'Double': { enumerable: true, value: 8, writable: false },
'Uint8Clamped': { enumerable: true, value: 9, writable: false }
});
Object.defineProperty(exports, 'Types', {
enumerable: true, value: Types, writable: false
});
// usage: obj = alloc(n[, obj][, type]);
function alloc(n, obj, type) {
smalloc: fix assertion fails/segfault * Numeric values passed to alloc were converted to int32, not uint32 before the range check, which allows wrap around on ToUint32. This would cause massive malloc calls and v8 fatal errors. * dispose would not check if value was an Object, causing segfault if a Primitive was passed. * kMaxLength was not enumerable.
12 years ago
n = n >>> 0;
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require('smalloc') to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
smalloc: fix assertion fails/segfault * Numeric values passed to alloc were converted to int32, not uint32 before the range check, which allows wrap around on ToUint32. This would cause massive malloc calls and v8 fatal errors. * dispose would not check if value was an Object, causing segfault if a Primitive was passed. * kMaxLength was not enumerable.
12 years ago
if (util.isUndefined(obj))
obj = {};
smalloc: allow different external array types smalloc.alloc now accepts an optional third argument which allows specifying the type of array that should be allocated. All available types are now located on smalloc.Types.
12 years ago
if (util.isNumber(obj)) {
type = obj >>> 0;
obj = {};
} else if (util.isPrimitive(obj)) {
smalloc: fix assertion fails/segfault * Numeric values passed to alloc were converted to int32, not uint32 before the range check, which allows wrap around on ToUint32. This would cause massive malloc calls and v8 fatal errors. * dispose would not check if value was an Object, causing segfault if a Primitive was passed. * kMaxLength was not enumerable.
12 years ago
throw new TypeError('obj must be an Object');
smalloc: allow different external array types smalloc.alloc now accepts an optional third argument which allows specifying the type of array that should be allocated. All available types are now located on smalloc.Types.
12 years ago
}
smalloc: update use of ExternalArrayType constants The constants in enum v8::ExternalArrayType have been changed. The old values are there for legacy reasons, but it's best to update anyway. Signed-off-by: Trevor Norris <trev.norris@gmail.com>
10 years ago
// 1 == v8::kExternalUint8Array, 9 == v8::kExternalUint8ClampedArray
smalloc: allow different external array types smalloc.alloc now accepts an optional third argument which allows specifying the type of array that should be allocated. All available types are now located on smalloc.Types.
12 years ago
if (type < 1 || type > 9)
throw new TypeError('unknown external array type: ' + type);
src: Replace macros with util functions
12 years ago
if (util.isArray(obj))
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require(&#39;smalloc&#39;) to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
throw new TypeError('Arrays are not supported');
smalloc: allow different external array types smalloc.alloc now accepts an optional third argument which allows specifying the type of array that should be allocated. All available types are now located on smalloc.Types.
12 years ago
if (n > kMaxLength)
throw new RangeError('n > kMaxLength');
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require(&#39;smalloc&#39;) to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
smalloc: allow different external array types smalloc.alloc now accepts an optional third argument which allows specifying the type of array that should be allocated. All available types are now located on smalloc.Types.
12 years ago
return smalloc.alloc(obj, n, type);
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require(&#39;smalloc&#39;) to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
}
function dispose(obj) {
smalloc: fix assertion fails/segfault * Numeric values passed to alloc were converted to int32, not uint32 before the range check, which allows wrap around on ToUint32. This would cause massive malloc calls and v8 fatal errors. * dispose would not check if value was an Object, causing segfault if a Primitive was passed. * kMaxLength was not enumerable.
12 years ago
if (util.isPrimitive(obj))
throw new TypeError('obj must be an Object');
src: Replace macros with util functions
12 years ago
if (util.isBuffer(obj))
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require(&#39;smalloc&#39;) to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
throw new TypeError('obj cannot be a Buffer');
smalloc: check if obj has external data PR-URL: https://github.com/joyent/node/pull/8655 Reviewed-by: Trevor Norris &lt;trev.norris@gmail.com&gt;
10 years ago
if (!smalloc.hasExternalData(obj))
throw new Error('obj has no external array data');
smalloc: fix assertion fails/segfault * Numeric values passed to alloc were converted to int32, not uint32 before the range check, which allows wrap around on ToUint32. This would cause massive malloc calls and v8 fatal errors. * dispose would not check if value was an Object, causing segfault if a Primitive was passed. * kMaxLength was not enumerable.
12 years ago
smalloc: create separate module It will be confusing if later on we add Buffer#dispose(), and smalloc is its own cpp api anyways. So instead create a new require(&#39;smalloc&#39;) to expose the previous Buffer.alloc/dispose methods, and expose copyOnto and kMaxLength as well. Other changes: * Added documentation and additional tests. * smalloc::CopyOnto has changed from using assert() to throwing errors on bad argument values because it is not exposed to the user. * Minor style fixes.
12 years ago
smalloc.dispose(obj);
}