```rust
#[no_mangle]
pub unsafe extern "C" fn json_object_put(mut jso: *mut json_object) -> ::core::ffi::c_int {
    if jso.is_null() {
        return 0 as ::core::ffi::c_int;
    }
    '_c2rust_label: {
        /* Avoid invalid free and crash explicitly instead of (silently)
         * segfaulting.
         */
        if (*jso)._ref_count > 0 as uint32_t {
        } else {
            __assert_fail(
                b"jso->_ref_count > 0\0" as *const u8 as *const ::core::ffi::c_char,
                b"json_object.c\0" as *const u8 as *const ::core::ffi::c_char,
                192 as ::core::ffi::c_uint,
                b"int json_object_put(struct json_object *)\0" as *const u8
                    as *const ::core::ffi::c_char,
            );
        }
    };
    /* Note: this only allow the refcount to remain correct
     * when multiple threads are adjusting it.  It is still an error 
     * for a thread to decrement the refcount if it doesn't "own" it,
     * as that can result in the thread that loses the race to 0
     * operating on an already-freed object.
     */
    (*jso)._ref_count = (*jso)._ref_count.wrapping_sub(1);
    if (*jso)._ref_count > 0 as uint32_t {
        return 0 as ::core::ffi::c_int;
    }
    if (*jso)._user_delete.is_some() {
        (*jso)._user_delete.expect("non-null function pointer")(jso, (*jso)._userdata);
    }
    (*jso)._delete.expect("non-null function pointer")(jso);
    return 1 as ::core::ffi::c_int;
}
```