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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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TerminateThread
The TerminateThread function terminates a thread.
BOOL TerminateThread(
HANDLE hThread,
| // handle to the thread
| DWORD dwExitCode
| // exit code for the thread
| );
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Parameters
hThread
Identifies the thread to terminate.
Windows NT: The handle must have THREAD_TERMINATE access. For more information, see Thread Objects.
dwExitCode
Specifies the exit code for the thread. Use the GetExitCodeThread function to retrieve a thread's exit value.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error
information, call GetLastError.
Remarks
TerminateThread is used to cause a thread to exit. When this occurs, the target thread has no
chance to execute any user-mode code and its initial stack is not deallocated.
DLLs attached to the thread are not notified that the thread is terminating.
TerminateThread is a dangerous function that should only be used in the most extreme cases.
You should call TerminateThread only if you know exactly what the target thread is doing, and you control all
of the code that the target thread could possibly be running at the time of
the termination. For example, TerminateThread can result in the following problems:
- If the target thread owns a critical section, the critical section will not be
released.
- If the target thread is executing certain kernel32 calls when it is
terminated, the kernel32 state for the thread's process could be inconsistent.
- If the target thread is manipulating the global state of a shared DLL, the
state of the DLL could be destroyed, affecting other users of the DLL.
A thread cannot protect itself against TerminateThread, other than by controlling access to its handles. The thread handle returned
by the CreateThread and CreateProcess functions has THREAD_TERMINATE access, so any caller holding one of these
handles can terminate your thread.
If the target thread is the last thread of a process when this function is
called, the thread's process is also terminated.
The state of the thread object becomes signaled, releasing any other threads
that had been waiting for the thread to terminate. The thread's termination
status changes from STILL_ACTIVE to the value of the dwExitCode parameter.
Terminating a thread does not necessarily remove the thread object from the
system. A thread object is deleted when the last thread handle is closed.
See Also
CreateProcess, CreateThread, ExitThread, GetExitCodeThread
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Unix Manual Pages
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