# SDL_GetThreadID

Get the thread identifier for the specified thread.

## Header File

Defined in [SDL_thread.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_thread.h)

## Syntax

```c
SDL_threadID SDL_GetThreadID(SDL_Thread * thread);
```

## Function Parameters

|                            |            |                      |
| -------------------------- | ---------- | -------------------- |
| [SDL_Thread](SDL_Thread) * | **thread** | the thread to query. |

## Return Value

([SDL_threadID](SDL_threadID)) Returns the ID of the specified thread, or
the ID of the current thread if `thread` is NULL.

## Remarks

This thread identifier is as reported by the underlying operating system.
If SDL is running on a platform that does not support threads the return
value will always be zero.

## Version

This function is available since SDL 2.0.0.

## See Also

- [SDL_ThreadID](SDL_ThreadID)

----
[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryThread](CategoryThread)

