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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;
// 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: 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
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
});
function alloc(n, 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
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 = {};
else if (util.isPrimitive(obj))
throw new TypeError('obj must be an Object');
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
if (n > kMaxLength)
throw new RangeError('n > kMaxLength');
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('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
throw new TypeError('Arrays are not supported');
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
return smalloc.alloc(obj, n);
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
}
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('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
throw new TypeError('obj cannot be a Buffer');
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('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.dispose(obj);
}