System and method for creating thread-safe shared libraries

Details System and method for creating thread-safe shared libraries System and method for creating thread-safe shared libraries

1993-11-01

1996-01-02

Kriess, Kevin A.

Boots, shoes, and leggings

395491, 395472, 395700, 3642453, 364228, 3642281, G06F 1300, G06F 1516

Patent

active

054817064

ABSTRACT:
Libraries for use in a multithreaded computer environment which must be thread-safe and cannot be recoded are identified. Such libraries, after identification, are repackaged. Export routines for such libraries will thereby acquire a front end which effects several steps. First a write-exclusive lock for a particular called function of one of the libraries is generically acquired. A call is then made to the underlying function whose name has been remapped. Upon return from the real routine, the write-exclusive lock is unlocked and a return to the user is executed. The system and method ensure correct functioning and integrity of the identified library functions accessible by multiple threads, as well as providing for creation of multithread-safe shared libraries without necessitating extensive library source modifications.

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"Memory Protection Software Facility for OS/2 Shared Data Applications", IBM Technical Disclosure Bulletin, vol. 34, No. 4A, Sep. 1991, pp. 81-89.

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