| 摘要 |
A bit-parallel system and method for allocating storage space for data objects using a bitmap. It is determined whether a suffix of free space bits in a previous bitmap word can be used with a prefix of free space bits in a current word that is contiguous to the previous word. If so, this renders a string of free space bits spanning multiple words, and it is determined whether the string represents a sufficiently large number of contiguous blocks ("the target") to store the data object. If not, it is determined whether sufficient contiguous free space bits in the current word exist to fulfill the target. If the target still can't be achieved, the longest suffix of free space bits in the current word is found for possible use with the prefix of the next contiguous word, and the next word is then retrieved and processed. The algorithm for finding the suffix preferably is undertaken by considering bits in parallel.
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