Made nstd_os_unix_shared_lib_free unsafe.

Author: RustEnthusiast

include/nstd/os/unix/shared_lib.h

@@ -66,6 +66,10 @@ NSTDAPI NSTDAnyMut nstd_os_unix_shared_lib_get_mut(NSTDUnixSharedLib *lib, const
 /// # Parameters:
 ///
 /// - `NSTDUnixSharedLib lib` - A handle to the loaded library to unload.
+///
+/// # Safety
+///
+/// See <https://man7.org/linux/man-pages/man3/dlclose.3p.html>.
 NSTDAPI void nstd_os_unix_shared_lib_free(NSTDUnixSharedLib lib);
 
 #endif

src/os/unix/shared_lib.rs

@@ -98,7 +98,11 @@ pub unsafe extern "C" fn nstd_os_unix_shared_lib_get_mut(
 /// # Parameters:
 ///
 /// - `NSTDUnixSharedLib lib` - A handle to the loaded library to unload.
+///
+/// # Safety
+///
+/// See <https://man7.org/linux/man-pages/man3/dlclose.3p.html>.
 #[inline]
 #[cfg_attr(feature = "clib", no_mangle)]
 #[allow(unused_variables)]
-pub extern "C" fn nstd_os_unix_shared_lib_free(lib: NSTDUnixSharedLib) {}
+pub unsafe extern "C" fn nstd_os_unix_shared_lib_free(lib: NSTDUnixSharedLib) {}