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# PR_SetThreadPriority
Sets the priority of a specified thread.
## Syntax
```{code}
#include <prthread.h>
void PR_SetThreadPriority(
PRThread *thread,
PRThreadPriority priority);
```
### Parameters
{ref}`PR_SetThreadPriority` has the following parameters:
`thread`
: A valid identifier for the thread whose priority you want to set.
`priority`
: The priority you want to set.
## Description
Modifying the priority of a thread other than the calling thread is
risky. It is difficult to ensure that the state of the target thread
permits a priority adjustment without ill effects. It is preferable for
a thread to specify itself in the thread parameter when it calls
{ref}`PR_SetThreadPriority`.