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tutorial: Fix type mismatch in example FFI code

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Compile error:
time.rs:13:23: 13:43 error: mismatched types: expected
*R[tv_sec=mMltv_usec=mMl] but found *R[tv_sec=Mltv_usec=Ml] (record
elements differ in mutability)
time.rs:13     libc::gettimeofday(std::ptr::addr_of(x),
std::ptr::null());
                                  ^~~~~~~~~~~~~~~~~~~~
error: aborting due to previous errors
rust: upcall fail 'explicit failure', ../src/comp/driver/session.rs:70
rust: domain main @0x9dfd178 root task failed
This commit is contained in:
Haitao Li 2011-11-17 22:46:44 +08:00
parent 388eed383f
commit f4eb25e0d0
1 changed files with 1 additions and 1 deletions
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doc/tutorial/ffi.md
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@ -183,7 +183,7 @@ microsecond-resolution timer.
fn gettimeofday(tv: *timeval, tz: *()) -> i32;
}
fn unix_time_in_microseconds() -> u64 unsafe {
let x = {tv_sec: 0u32, tv_usec: 0u32};
let x = {mutable tv_sec: 0u32, mutable tv_usec: 0u32};
libc::gettimeofday(std::ptr::addr_of(x), std::ptr::null());
ret (x.tv_sec as u64) * 1000_000_u64 + (x.tv_usec as u64);
}