---
name: "rtcGetSYCLDeviceFunctionPointer"
section: "3embree4"
platform: "linux"
package: "embree"
version: "4.4.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/rtcGetSYCLDeviceFunctionPointer/3embree4"
---

# rtcGetSYCLDeviceFunctionPointer(3embree4)

### NAME

-

  ```
  rtcGetSYCLDeviceFunctionPointer - obtains a device side
    function pointer for some SYCL function
  ```

### SYNOPSIS

-

  ```
  #include <embree4/rtcore.h>
  template<auto F>
  inline decltype(F) rtcGetSYCLDeviceFunctionPointer(sycl::queue& queue);
  ```

### DESCRIPTION

This function returns a device side function pointer for some function F. This function F must be defined using the `RTC_SYCL_INDIRECTLY_CALLABLE` attribute, e.g.:

-

  ```
  RTC_SYCL_INDIRECTLY_CALLABLE void filter(
    const RTCFilterFunctionNArguments* args) { ... }
  RTCFilterFunctionN fptr = rtcGetSYCLDeviceFunctionPointer<filter>(queue);
  ```

Such a device side function pointers of some filter callbacks can get assigned to a geometry using the `rtcSetGeometryIntersectFilterFunction` and `rtcSetGeometryOccludedFilterFunction` API functions.

Further, device side function pointers for user geometry callbacks can be assigned to geometries using the `rtcSetGeometryIntersectFunction` and `rtcSetGeometryOccludedFunction` API calls.

These geometry versions of the callback functions are disabled in SYCL by default, and we recommend not using them for performance reasons.

### EXIT STATUS

On failure an error code is set that can be queried using `rtcGetDeviceError`.

### SEE ALSO

\[rtcSetGeometryIntersectFunction\], \[rtcSetGeometryOccludedFunction\], \[rtcSetGeometryIntersectFilterFunction\], \[rtcSetGeometryOccludedFilterFunction\]