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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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DisableThreadLibraryCalls
The DisableThreadLibraryCalls function disables the DLL_THREAD_ATTACH and DLL_THREAD_DETACH notifications
for the dynamic-link library (DLL) specified by hLibModule. This can reduce the size of the working code set for some applications.
BOOL DisableThreadLibraryCalls(
HMODULE hLibModule
| // dynamic-link library for which calls are to be disabled
| );
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Parameters
hLibModule
Specifies the dynamic-link library module for which the DLL_THREAD_ATTACH and
DLL_THREAD_DETACH notifications are to be disabled.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. The DisableThreadLibraryCalls function fails if the DLL specified by hLibModule has active static thread local storage, or if hLibModule is an invalid module handle. To get extended error information, call GetLastError.
Remarks
The DisableThreadLibraryCalls function lets a DLL disable the DLL_THREAD_ATTACH and DLL_THREAD_DETACH
notification calls. This can be a useful optimization for multithreaded applications
that have many DLLs, frequently create and delete threads, and whose DLLs do
not need these thread-level notifications of attachment/detachment. A remote
procedure call (RPC) server application is an example of such an application. In
these sorts of applications, DLL initialization routines often remain in memory
to service DLL_THREAD_ATTACH and DLL_THREAD_DETACH notifications. By disabling
the notifications, the DLL initialization code is not paged in because a thread
is created or deleted, thus reducing the size of the application's working
code set. To implement the optimization, modify a DLL's DLL_PROCESS_ATTACH code to
call DisableThreadLibraryCalls.
See Also
FreeLibraryAndExitThread
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