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tutorial: Fix types in gettimeofday example. Closes #1657

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Brian Anderson 2012-01-26 15:45:00 -08:00
parent 5e250b6951
commit 6d360d2b02
1 changed files with 5 additions and 3 deletions
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doc/tutorial.md
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@ -2334,17 +2334,19 @@ microsecond-resolution timer.
~~~~ ~~~~
use std; use std;
type timeval = {mutable tv_sec: u32, type timeval = {mutable tv_sec: uint,
mutable tv_usec: u32}; mutable tv_usec: uint};
#[nolink] #[nolink]
native mod libc { native mod libc {
fn gettimeofday(tv: *timeval, tz: *()) -> i32; fn gettimeofday(tv: *timeval, tz: *()) -> i32;
} }
fn unix_time_in_microseconds() -> u64 unsafe { fn unix_time_in_microseconds() -> u64 unsafe {
let x = {mutable tv_sec: 0u32, mutable tv_usec: 0u32}; let x = {mutable tv_sec: 0u, mutable tv_usec: 0u};
libc::gettimeofday(ptr::addr_of(x), ptr::null()); libc::gettimeofday(ptr::addr_of(x), ptr::null());
ret (x.tv_sec as u64) * 1000_000_u64 + (x.tv_usec as u64); ret (x.tv_sec as u64) * 1000_000_u64 + (x.tv_usec as u64);
} }
# fn main() { assert #fmt("%?", unix_time_in_microseconds()) != ""; }
~~~~ ~~~~
The `#[nolink]` attribute indicates that there's no native library to link The `#[nolink]` attribute indicates that there's no native library to link