library/std/src/sys/sgx/abi/thread.rs

   1 use fortanix_sgx_abi::Tcs;
   2
   3 /// Gets the ID for the current thread. The ID is guaranteed to be unique among
   4 /// all currently running threads in the enclave, and it is guaranteed to be
   5 /// constant for the lifetime of the thread. More specifically for SGX, there
   6 /// is a one-to-one correspondence of the ID to the address of the TCS.
   7 #[unstable(feature = "sgx_platform", issue = "56975")]
   8 pub fn current() -> Tcs {
   9     extern "C" {
  10         fn get_tcs_addr() -> *mut u8;
  11     }
  12     let addr = unsafe { get_tcs_addr() };
  13     match Tcs::new(addr) {
  14         Some(tcs) => tcs,
  15         None => rtabort!("TCS must not be placed at address zero (this is a linker error)"),
  16     }
  17 }