Microsoft KB Archive/101193

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INFO: Interrupting Threads in Critical Sections

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Q101193

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The information in this article applies to:


 * Microsoft Win32 Application Programming Interface (API), used with:
 * Microsoft Windows NT Server versions 3.1, 3.5, 3.51
 * Microsoft Windows NT Workstation versions 3.1, 3.5, 3.51
 * Microsoft Windows 95

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If a thread enters a critical section and then terminates abnormally, the critical section object will not be released. Many components of the C Run-time library are not reentrant and use a resource locking scheme to maintain coherency in the multithreaded environment. Thus, a thread that has entered a C Run-time function, such as printf, could deadlock all access (within that process) to printf if it terminates abnormally.

This situation could arise if a thread is terminated with TerminateThread while it holds a resource lock. If this occurs, any thread that tries to acquire that resource lock will become deadlocked.

SUMMARY
Additional query words: 3.10 3.50 4.00

Keywords :

Issue type : kbinfo

Technology : kbAudDeveloper kbWin32sSearch kbWin32API