Function _mi_thread_id

3rd/mimalloc-2.0.9/include/mimalloc-internal.h:846–849

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
static inline mi_threadid_t _mi_thread_id(void) mi_attr_noexcept {
  // Windows: works on Intel and ARM in both 32- and 64-bit
  return (uintptr_t)NtCurrentTeb();
}

// We use assembly for a fast thread id on the main platforms. The TLS layout depends on
// both the OS and libc implementation so we use specific tests for each main platform.