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Replace deprecated compare_and_swap with compare_exchange (#514)

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The `compare_and_swap` method on atomics is now deprecated in favor
of `compare_exchange`.

Since the author of #510 closed that PR, this is just #510 with rustfmt run.

I also removed an unnecessary trailing semicolon that the latest rust
compiler now complains about.

Signed-off-by: Eliza Weisman <eliza@buoyant.io>

Co-authored-by: Kornel <kornel@cloudflare.com>
This commit is contained in:
Eliza Weisman
2021-02-05 09:27:27 -08:00
committed by GitHub
parent eec547d0dd
commit 2c8c847cd5
2 changed files with 31 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
src/proto/ping_pong.rs
View File

@@ -211,11 +211,16 @@ impl ReceivedPing {
impl UserPings {
pub(crate) fn send_ping(&self) -> Result<(), Option<proto::Error>> {
let prev = self.0.state.compare_and_swap(
USER_STATE_EMPTY, // current
USER_STATE_PENDING_PING, // new
Ordering::AcqRel,
);
let prev = self
.0
.state
.compare_exchange(
USER_STATE_EMPTY, // current
USER_STATE_PENDING_PING, // new
Ordering::AcqRel,
Ordering::Acquire,
)
.unwrap_or_else(|v| v);
match prev {
USER_STATE_EMPTY => {
@@ -234,11 +239,16 @@ impl UserPings {
// Must register before checking state, in case state were to change
// before we could register, and then the ping would just be lost.
self.0.pong_task.register(cx.waker());
let prev = self.0.state.compare_and_swap(
USER_STATE_RECEIVED_PONG, // current
USER_STATE_EMPTY, // new
Ordering::AcqRel,
);
let prev = self
.0
.state
.compare_exchange(
USER_STATE_RECEIVED_PONG, // current
USER_STATE_EMPTY, // new
Ordering::AcqRel,
Ordering::Acquire,
)
.unwrap_or_else(|v| v);
match prev {
USER_STATE_RECEIVED_PONG => Poll::Ready(Ok(())),
@@ -252,11 +262,16 @@ impl UserPings {
impl UserPingsRx {
fn receive_pong(&self) -> bool {
let prev = self.0.state.compare_and_swap(
USER_STATE_PENDING_PONG, // current
USER_STATE_RECEIVED_PONG, // new
Ordering::AcqRel,
);
let prev = self
.0
.state
.compare_exchange(
USER_STATE_PENDING_PONG, // current
USER_STATE_RECEIVED_PONG, // new
Ordering::AcqRel,
Ordering::Acquire,
)
.unwrap_or_else(|v| v);
if prev == USER_STATE_PENDING_PONG {
self.0.pong_task.wake();

2
src/server.rs
View File

@@ -1371,7 +1371,7 @@ impl proto::Peer for Peer {
reason: Reason::PROTOCOL_ERROR,
});
}}
};
}
b = b.version(Version::HTTP_2);