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|
use libc::c_int;
use nix::{Error, Result};
use nix::errno::*;
use nix::sys::aio::*;
use nix::sys::signal::*;
use nix::sys::time::{TimeSpec, TimeValLike};
use std::io::{Write, Read, Seek, SeekFrom};
use std::os::unix::io::AsRawFd;
use std::{thread, time};
use tempfile::tempfile;
// Helper that polls an AioCb for completion or error
fn poll_aio(mut aiocb: &mut AioCb) -> Result<()> {
loop {
let err = aiocb.error();
if err != Err(Error::from(Errno::EINPROGRESS)) { return err; };
thread::sleep(time::Duration::from_millis(10));
}
}
// Tests AioCb.cancel. We aren't trying to test the OS's implementation, only our
// bindings. So it's sufficient to check that AioCb.cancel returned any
// AioCancelStat value.
#[test]
fn test_cancel() {
let mut wbuf = "CDEF".to_string().into_bytes();
let f = tempfile().unwrap();
let mut aiocb = AioCb::from_mut_slice( f.as_raw_fd(),
0, //offset
&mut wbuf,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_NOP);
aiocb.write().unwrap();
let err = aiocb.error();
assert!(err == Ok(()) || err == Err(Error::from(Errno::EINPROGRESS)));
let cancelstat = aiocb.cancel();
assert!(cancelstat.is_ok());
// Wait for aiocb to complete, but don't care whether it succeeded
let _ = poll_aio(&mut aiocb);
let _ = aiocb.aio_return();
}
// Tests using aio_cancel_all for all outstanding IOs.
#[test]
fn test_aio_cancel_all() {
let mut wbuf = "CDEF".to_string().into_bytes();
let f = tempfile().unwrap();
let mut aiocb = AioCb::from_mut_slice( f.as_raw_fd(),
0, //offset
&mut wbuf,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_NOP);
aiocb.write().unwrap();
let err = aiocb.error();
assert!(err == Ok(()) || err == Err(Error::from(Errno::EINPROGRESS)));
let cancelstat = aio_cancel_all(f.as_raw_fd());
assert!(cancelstat.is_ok());
// Wait for aiocb to complete, but don't care whether it succeeded
let _ = poll_aio(&mut aiocb);
let _ = aiocb.aio_return();
}
#[test]
fn test_fsync() {
const INITIAL: &'static [u8] = b"abcdef123456";
let mut f = tempfile().unwrap();
f.write(INITIAL).unwrap();
let mut aiocb = AioCb::from_fd( f.as_raw_fd(),
0, //priority
SigevNotify::SigevNone);
let err = aiocb.fsync(AioFsyncMode::O_SYNC);
assert!(err.is_ok());
poll_aio(&mut aiocb).unwrap();
aiocb.aio_return().unwrap();
}
#[test]
fn test_aio_suspend() {
const INITIAL: &'static [u8] = b"abcdef123456";
const WBUF: &'static [u8] = b"CDEF";
let timeout = TimeSpec::seconds(10);
let mut rbuf = vec![0; 4];
let mut f = tempfile().unwrap();
f.write(INITIAL).unwrap();
let mut wcb = unsafe {
AioCb::from_slice( f.as_raw_fd(),
2, //offset
&mut WBUF,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_WRITE)
};
let mut rcb = AioCb::from_mut_slice( f.as_raw_fd(),
8, //offset
&mut rbuf,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_READ);
wcb.write().unwrap();
rcb.read().unwrap();
loop {
{
let cbbuf = [&wcb, &rcb];
assert!(aio_suspend(&cbbuf[..], Some(timeout)).is_ok());
}
if rcb.error() != Err(Error::from(Errno::EINPROGRESS)) &&
wcb.error() != Err(Error::from(Errno::EINPROGRESS)) {
break
}
}
assert!(wcb.aio_return().unwrap() as usize == WBUF.len());
assert!(rcb.aio_return().unwrap() as usize == WBUF.len());
}
// Test a simple aio operation with no completion notification. We must poll
// for completion
#[test]
fn test_read() {
const INITIAL: &'static [u8] = b"abcdef123456";
let mut rbuf = vec![0; 4];
const EXPECT: &'static [u8] = b"cdef";
let mut f = tempfile().unwrap();
f.write(INITIAL).unwrap();
{
let mut aiocb = AioCb::from_mut_slice( f.as_raw_fd(),
2, //offset
&mut rbuf,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_NOP);
aiocb.read().unwrap();
let err = poll_aio(&mut aiocb);
assert!(err == Ok(()));
assert!(aiocb.aio_return().unwrap() as usize == EXPECT.len());
}
assert!(rbuf == EXPECT);
}
// Test a simple aio operation with no completion notification. We must poll
// for completion. Unlike test_aio_read, this test uses AioCb::from_slice
#[test]
fn test_write() {
const INITIAL: &'static [u8] = b"abcdef123456";
const WBUF: &'static [u8] = b"CDEF"; //"CDEF".to_string().into_bytes();
let mut rbuf = Vec::new();
const EXPECT: &'static [u8] = b"abCDEF123456";
let mut f = tempfile().unwrap();
f.write(INITIAL).unwrap();
let mut aiocb = unsafe {
AioCb::from_slice( f.as_raw_fd(),
2, //offset
&WBUF,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_NOP)
};
aiocb.write().unwrap();
let err = poll_aio(&mut aiocb);
assert!(err == Ok(()));
assert!(aiocb.aio_return().unwrap() as usize == WBUF.len());
f.seek(SeekFrom::Start(0)).unwrap();
let len = f.read_to_end(&mut rbuf).unwrap();
assert!(len == EXPECT.len());
assert!(rbuf == EXPECT);
}
// XXX: should be sig_atomic_t, but rust's libc doesn't define that yet
static mut signaled: i32 = 0;
extern fn sigfunc(_: c_int) {
// It's a pity that Rust can't understand that static mutable sig_atomic_t
// variables can be safely accessed
unsafe { signaled = 1 };
}
// Test an aio operation with completion delivered by a signal
#[test]
fn test_write_sigev_signal() {
let sa = SigAction::new(SigHandler::Handler(sigfunc),
SA_RESETHAND,
SigSet::empty());
unsafe {signaled = 0 };
unsafe { sigaction(Signal::SIGUSR2, &sa) }.unwrap();
const INITIAL: &'static [u8] = b"abcdef123456";
const WBUF: &'static [u8] = b"CDEF";
let mut rbuf = Vec::new();
const EXPECT: &'static [u8] = b"abCDEF123456";
let mut f = tempfile().unwrap();
f.write(INITIAL).unwrap();
let mut aiocb = unsafe {
AioCb::from_slice( f.as_raw_fd(),
2, //offset
&WBUF,
0, //priority
SigevNotify::SigevSignal {
signal: Signal::SIGUSR2,
si_value: 0 //TODO: validate in sigfunc
},
LioOpcode::LIO_NOP)
};
aiocb.write().unwrap();
while unsafe { signaled == 0 } {
thread::sleep(time::Duration::from_millis(10));
}
assert!(aiocb.aio_return().unwrap() as usize == WBUF.len());
f.seek(SeekFrom::Start(0)).unwrap();
let len = f.read_to_end(&mut rbuf).unwrap();
assert!(len == EXPECT.len());
assert!(rbuf == EXPECT);
}
// Test lio_listio with LIO_WAIT, so all AIO ops should be complete by the time
// lio_listio returns.
#[test]
#[cfg(not(any(target_os = "ios", target_os = "macos")))]
fn test_lio_listio_wait() {
const INITIAL: &'static [u8] = b"abcdef123456";
const WBUF: &'static [u8] = b"CDEF";
let mut rbuf = vec![0; 4];
let mut rbuf2 = Vec::new();
const EXPECT: &'static [u8] = b"abCDEF123456";
let mut f = tempfile().unwrap();
f.write(INITIAL).unwrap();
{
let mut wcb = unsafe {
AioCb::from_slice( f.as_raw_fd(),
2, //offset
&WBUF,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_WRITE)
};
let mut rcb = AioCb::from_mut_slice( f.as_raw_fd(),
8, //offset
&mut rbuf,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_READ);
let err = lio_listio(LioMode::LIO_WAIT, &[&mut wcb, &mut rcb], SigevNotify::SigevNone);
err.expect("lio_listio failed");
assert!(wcb.aio_return().unwrap() as usize == WBUF.len());
assert!(rcb.aio_return().unwrap() as usize == WBUF.len());
}
assert!(rbuf == b"3456");
f.seek(SeekFrom::Start(0)).unwrap();
let len = f.read_to_end(&mut rbuf2).unwrap();
assert!(len == EXPECT.len());
assert!(rbuf2 == EXPECT);
}
// Test lio_listio with LIO_NOWAIT and no SigEvent, so we must use some other
// mechanism to check for the individual AioCb's completion.
#[test]
#[cfg(not(any(target_os = "ios", target_os = "macos")))]
fn test_lio_listio_nowait() {
const INITIAL: &'static [u8] = b"abcdef123456";
const WBUF: &'static [u8] = b"CDEF";
let mut rbuf = vec![0; 4];
let mut rbuf2 = Vec::new();
const EXPECT: &'static [u8] = b"abCDEF123456";
let mut f = tempfile().unwrap();
f.write(INITIAL).unwrap();
{
let mut wcb = unsafe {
AioCb::from_slice( f.as_raw_fd(),
2, //offset
&WBUF,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_WRITE)
};
let mut rcb = AioCb::from_mut_slice( f.as_raw_fd(),
8, //offset
&mut rbuf,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_READ);
let err = lio_listio(LioMode::LIO_NOWAIT, &[&mut wcb, &mut rcb], SigevNotify::SigevNone);
err.expect("lio_listio failed");
poll_aio(&mut wcb).unwrap();
poll_aio(&mut rcb).unwrap();
assert!(wcb.aio_return().unwrap() as usize == WBUF.len());
assert!(rcb.aio_return().unwrap() as usize == WBUF.len());
}
assert!(rbuf == b"3456");
f.seek(SeekFrom::Start(0)).unwrap();
let len = f.read_to_end(&mut rbuf2).unwrap();
assert!(len == EXPECT.len());
assert!(rbuf2 == EXPECT);
}
// Test lio_listio with LIO_NOWAIT and a SigEvent to indicate when all AioCb's
// are complete.
#[test]
#[cfg(not(any(target_os = "ios", target_os = "macos")))]
fn test_lio_listio_signal() {
const INITIAL: &'static [u8] = b"abcdef123456";
const WBUF: &'static [u8] = b"CDEF";
let mut rbuf = vec![0; 4];
let mut rbuf2 = Vec::new();
const EXPECT: &'static [u8] = b"abCDEF123456";
let mut f = tempfile().unwrap();
let sa = SigAction::new(SigHandler::Handler(sigfunc),
SA_RESETHAND,
SigSet::empty());
let sigev_notify = SigevNotify::SigevSignal { signal: Signal::SIGUSR2,
si_value: 0 };
f.write(INITIAL).unwrap();
{
let mut wcb = unsafe {
AioCb::from_slice( f.as_raw_fd(),
2, //offset
&WBUF,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_WRITE)
};
let mut rcb = AioCb::from_mut_slice( f.as_raw_fd(),
8, //offset
&mut rbuf,
0, //priority
SigevNotify::SigevNone,
LioOpcode::LIO_READ);
unsafe {signaled = 0 };
unsafe { sigaction(Signal::SIGUSR2, &sa) }.unwrap();
let err = lio_listio(LioMode::LIO_NOWAIT, &[&mut wcb, &mut rcb], sigev_notify);
err.expect("lio_listio failed");
while unsafe { signaled == 0 } {
thread::sleep(time::Duration::from_millis(10));
}
assert!(wcb.aio_return().unwrap() as usize == WBUF.len());
assert!(rcb.aio_return().unwrap() as usize == WBUF.len());
}
assert!(rbuf == b"3456");
f.seek(SeekFrom::Start(0)).unwrap();
let len = f.read_to_end(&mut rbuf2).unwrap();
assert!(len == EXPECT.len());
assert!(rbuf2 == EXPECT);
}
|
