diff options
Diffstat (limited to 'deps/npm/node_modules/bluebird/js/release/queue.js')
-rw-r--r-- | deps/npm/node_modules/bluebird/js/release/queue.js | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/deps/npm/node_modules/bluebird/js/release/queue.js b/deps/npm/node_modules/bluebird/js/release/queue.js new file mode 100644 index 0000000000..ffd36fda1f --- /dev/null +++ b/deps/npm/node_modules/bluebird/js/release/queue.js @@ -0,0 +1,73 @@ +"use strict"; +function arrayMove(src, srcIndex, dst, dstIndex, len) { + for (var j = 0; j < len; ++j) { + dst[j + dstIndex] = src[j + srcIndex]; + src[j + srcIndex] = void 0; + } +} + +function Queue(capacity) { + this._capacity = capacity; + this._length = 0; + this._front = 0; +} + +Queue.prototype._willBeOverCapacity = function (size) { + return this._capacity < size; +}; + +Queue.prototype._pushOne = function (arg) { + var length = this.length(); + this._checkCapacity(length + 1); + var i = (this._front + length) & (this._capacity - 1); + this[i] = arg; + this._length = length + 1; +}; + +Queue.prototype.push = function (fn, receiver, arg) { + var length = this.length() + 3; + if (this._willBeOverCapacity(length)) { + this._pushOne(fn); + this._pushOne(receiver); + this._pushOne(arg); + return; + } + var j = this._front + length - 3; + this._checkCapacity(length); + var wrapMask = this._capacity - 1; + this[(j + 0) & wrapMask] = fn; + this[(j + 1) & wrapMask] = receiver; + this[(j + 2) & wrapMask] = arg; + this._length = length; +}; + +Queue.prototype.shift = function () { + var front = this._front, + ret = this[front]; + + this[front] = undefined; + this._front = (front + 1) & (this._capacity - 1); + this._length--; + return ret; +}; + +Queue.prototype.length = function () { + return this._length; +}; + +Queue.prototype._checkCapacity = function (size) { + if (this._capacity < size) { + this._resizeTo(this._capacity << 1); + } +}; + +Queue.prototype._resizeTo = function (capacity) { + var oldCapacity = this._capacity; + this._capacity = capacity; + var front = this._front; + var length = this._length; + var moveItemsCount = (front + length) & (oldCapacity - 1); + arrayMove(this, 0, this, oldCapacity, moveItemsCount); +}; + +module.exports = Queue; |