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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
| This is valid on SMP platforms only; Windows 95 returns a constant
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SetThreadAffinityMask
The SetThreadAffinityMask function sets a processor affinity mask for a specified thread.
A thread affinity mask is a bit vector in which each bit represents the
processors that a thread is allowed to run on.
A thread affinity mask must be a proper subset of the process affinity mask
for the containing process of a thread. A thread is only allowed to run on the
processors its process is allowed to run on.
DWORD SetThreadAffinityMask (
HANDLE hThread,
| // handle to the thread of interest
| DWORD dwThreadAffinityMask
| // a thread affinity mask
| );
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Parameters
hThread
A handle to the thread whose affinity mask the function sets.
Windows NT: This handle must have the THREAD_SET_INFORMATION access right associated with
it. For more information, see Thread Objects.
dwThreadAffinityMask
Windows 95: This value must be 1.
Windows NT: Specifies an affinity mask for the thread.
Return Values
If the function succeeds, the return value is nonzero.
Windows 95: The return value is 1. To succeed, hThread must be valid and dwThreadAffinityMask must be 1.
Windows NT: The return value is the thread's previous affinity mask.
If the function fails, the return value is zero. To get extended error
information, call GetLastError.
See Also
GetProcessAffinityMask, SetThreadIdealProcessor
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