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win32: make sleep_microseconds for backoff just do a win32 Sleep(0)

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This commit is contained in:
Vladimir Vukicevic 2015-10-05 12:07:27 -04:00 • committed by Lars Bergstrom
parent 025ed57c04
commit 5e136d6dd5
2 changed files with 24 additions and 3 deletions
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3
components/util/Cargo.toml
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@ -66,3 +66,6 @@ getopts = "0.2.11"
hyper = { version = "0.7", optional = true } hyper = { version = "0.7", optional = true }
url = {version = "0.5.2", features = ["serde_serialization"]} url = {version = "0.5.2", features = ["serde_serialization"]}
uuid = "0.1.17" uuid = "0.1.17"
[target.x86_64-pc-windows-gnu.dependencies]
kernel32-sys = "0.1.4"

24
components/util/workqueue.rs
View file

@ -7,8 +7,13 @@
//! Data associated with queues is simply a pair of unsigned integers. It is expected that a //! Data associated with queues is simply a pair of unsigned integers. It is expected that a
//! higher-level API on top of this could allow safe fork-join parallelism. //! higher-level API on top of this could allow safe fork-join parallelism.
#[cfg(windows)]
extern crate kernel32;
use deque::{Abort, BufferPool, Data, Empty, Stealer, Worker}; use deque::{Abort, BufferPool, Data, Empty, Stealer, Worker};
use libc::usleep; use libc::usleep;
#[cfg(not(windows))]
use libc::funcs::posix88::unistd::usleep;
use rand::{Rng, XorShiftRng, weak_rng}; use rand::{Rng, XorShiftRng, weak_rng};
use std::sync::atomic::{AtomicUsize, Ordering}; use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::mpsc::{Receiver, Sender, channel}; use std::sync::mpsc::{Receiver, Sender, channel};
@ -92,6 +97,20 @@ fn next_power_of_two(mut v: u32) -> u32 {
v v
} }
#[cfg(not(windows))]
fn sleep_microseconds(usec: u32) {
unsafe {
usleep(usec);
}
}
#[cfg(windows)]
fn sleep_microseconds(_: u32) {
unsafe {
kernel32::Sleep(0);
}
}
impl<QueueData: Sync, WorkData: Send> WorkerThread<QueueData, WorkData> { impl<QueueData: Sync, WorkData: Send> WorkerThread<QueueData, WorkData> {
/// The main logic. This function starts up the worker and listens for /// The main logic. This function starts up the worker and listens for
/// messages. /// messages.
@ -151,9 +170,8 @@ impl<QueueData: Sync, WorkData: Send> WorkerThread<QueueData, WorkData> {
} }
} }
unsafe { sleep_microseconds(back_off_sleep);
usleep(back_off_sleep as u32);
}
back_off_sleep += BACKOFF_INCREMENT_IN_US; back_off_sleep += BACKOFF_INCREMENT_IN_US;
i = 0 i = 0
} else { } else {