Type Alias DADiskClaimReleaseCallback 

pub type DADiskClaimReleaseCallback = Option<unsafe extern "C-unwind" fn(NonNull<DADisk>, *mut c_void) -> *const DADissenter>;

Available on crate features DADisk and DADissenter only.

Type of the callback function used by DADiskClaim().

Parameter disk: The disk object.

Parameter context: The user-defined context parameter given to the claim function.

Returns: A dissenter reference. Pass NULL to release claim.

The caller of this callback receives a reference to the returned object. The caller also implicitly retains the object and is responsible for releasing it with CFRelease().

See also Apple’s documentation

Aliased Type

pub enum DADiskClaimReleaseCallback {
    None,
    Some(unsafe extern "C-unwind" fn(NonNull<DADisk>, *mut c_void) -> *const DADissenter),
}

Variants

None

No value.

Some(unsafe extern "C-unwind" fn(NonNull<DADisk>, *mut c_void) -> *const DADissenter)

Some value of type T.