ASYNCHRONOUS INPUT/OUTPUT SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an asynchronous input/output system which generates no overhead of thread generation and secures no unnecessary memory. SOLUTION: A thread-in-asynchronous-input/output-processing storage part 13 is stored with the correspondence between a thread 12 which is in processing of asynchronous input and output requested by a process 11 and an inputted or outputted file. An asynchronous input/output request retrieving means 113 performs retrieval from a thread-in-asynchronous-input/output-processing storage part 13 to check whether or not there is a thread performing an asynchronous input/output processing for the same file with an asynchronous input/output request which is newly issued. When there is a thread performing the asynchronous input/output processing or the same file, the input/output processing of the new request is performed after the current input/output processing of the thread ends. When there is not thread in the asynchronous input/output processing for the same file, a new thread is generated and made to perform the input/output processing of the new request.