| 摘要 |
The invention relates to controlling access by a plurality of concurrently operating processes to a resource. An area of storage is allocated and a pre-determined number of slots defined therein. Responsive to a request by one of the processes for shared access to the resource, a determination is made as to whether to allocate shared access, and if so, the requesting process is allocated shared access upon the acquisition of one of the storage slots. Responsive to a request by one of the processes for exclusive access to the resource, a determination is made as to whether to allocate exclusive access, and if so exclusive access is allocated upon the acquisition of all of the storage slots.
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