Merge "ANDROID_UTILS_REF_BASE_DISABLE_IMPLICIT_CONSTRUCTION"
diff --git a/libstats/pull_rust/Android.bp b/libstats/pull_rust/Android.bp
new file mode 100644
index 0000000..3660199
--- /dev/null
+++ b/libstats/pull_rust/Android.bp
@@ -0,0 +1,55 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+rust_bindgen {
+ name: "libstatspull_bindgen",
+ wrapper_src: "statslog.h",
+ crate_name: "statspull_bindgen",
+ source_stem: "bindings",
+ bindgen_flags: [
+ "--size_t-is-usize",
+ "--whitelist-function=AStatsEventList_addStatsEvent",
+ "--whitelist-function=AStatsEvent_.*",
+ "--whitelist-function=AStatsManager_.*",
+ "--whitelist-var=AStatsManager_.*",
+ ],
+ target: {
+ android: {
+ shared_libs: [
+ "libstatspull",
+ "libstatssocket",
+ ],
+ },
+ host: {
+ static_libs: [
+ "libstatspull",
+ "libstatssocket",
+ ],
+ },
+ },
+}
+
+rust_library {
+ name: "libstatspull_rust",
+ crate_name: "statspull_rust",
+ srcs: ["stats_pull.rs"],
+ rustlibs: [
+ "liblazy_static",
+ "liblog_rust",
+ "libstatslog_rust_header",
+ "libstatspull_bindgen",
+ ],
+}
diff --git a/libstats/pull_rust/stats_pull.rs b/libstats/pull_rust/stats_pull.rs
new file mode 100644
index 0000000..174125e
--- /dev/null
+++ b/libstats/pull_rust/stats_pull.rs
@@ -0,0 +1,170 @@
+// Copyright 2021, The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! A Rust interface for the StatsD pull API.
+
+use lazy_static::lazy_static;
+use statslog_rust_header::{Atoms, Stat, StatsError};
+use statspull_bindgen::*;
+use std::collections::HashMap;
+use std::convert::TryInto;
+use std::os::raw::c_void;
+use std::sync::Mutex;
+
+/// The return value of callbacks.
+pub type StatsPullResult = Vec<Box<dyn Stat>>;
+
+/// A wrapper for AStatsManager_PullAtomMetadata.
+/// It calls AStatsManager_PullAtomMetadata_release on drop.
+pub struct Metadata {
+ metadata: *mut AStatsManager_PullAtomMetadata,
+}
+
+impl Metadata {
+ /// Calls AStatsManager_PullAtomMetadata_obtain.
+ pub fn new() -> Self {
+ // Safety: We panic if the memory allocation fails.
+ let metadata = unsafe { AStatsManager_PullAtomMetadata_obtain() };
+ if metadata.is_null() {
+ panic!("Cannot obtain pull atom metadata.");
+ } else {
+ Metadata { metadata }
+ }
+ }
+
+ /// Calls AStatsManager_PullAtomMetadata_setCoolDownMillis.
+ pub fn set_cooldown_millis(&mut self, cooldown_millis: i64) {
+ // Safety: Metadata::new ensures that self.metadata is a valid object.
+ unsafe { AStatsManager_PullAtomMetadata_setCoolDownMillis(self.metadata, cooldown_millis) }
+ }
+
+ /// Calls AStatsManager_PullAtomMetadata_getCoolDownMillis.
+ pub fn get_cooldown_millis(&self) -> i64 {
+ // Safety: Metadata::new ensures that self.metadata is a valid object.
+ unsafe { AStatsManager_PullAtomMetadata_getCoolDownMillis(self.metadata) }
+ }
+
+ /// Calls AStatsManager_PullAtomMetadata_setTimeoutMillis.
+ pub fn set_timeout_millis(&mut self, timeout_millis: i64) {
+ // Safety: Metadata::new ensures that self.metadata is a valid object.
+ unsafe { AStatsManager_PullAtomMetadata_setTimeoutMillis(self.metadata, timeout_millis) }
+ }
+
+ /// Calls AStatsManager_PullAtomMetadata_getTimeoutMillis.
+ pub fn get_timeout_millis(&self) -> i64 {
+ // Safety: Metadata::new ensures that self.metadata is a valid object.
+ unsafe { AStatsManager_PullAtomMetadata_getTimeoutMillis(self.metadata) }
+ }
+
+ /// Calls AStatsManager_PullAtomMetadata_setAdditiveFields.
+ pub fn set_additive_fields(&mut self, additive_fields: &mut Vec<i32>) {
+ // Safety: Metadata::new ensures that self.metadata is a valid object.
+ unsafe {
+ AStatsManager_PullAtomMetadata_setAdditiveFields(
+ self.metadata,
+ additive_fields.as_mut_ptr(),
+ additive_fields.len().try_into().expect("Cannot convert length to i32"),
+ )
+ }
+ }
+
+ /// Calls AStatsManager_PullAtomMetadata_getAdditiveFields.
+ pub fn get_additive_fields(&self) -> Vec<i32> {
+ // Safety: Metadata::new ensures that self.metadata is a valid object.
+ // We call getNumAdditiveFields to ensure we pass getAdditiveFields a large enough array.
+ unsafe {
+ let num_fields = AStatsManager_PullAtomMetadata_getNumAdditiveFields(self.metadata)
+ .try_into()
+ .expect("Cannot convert num additive fields to usize");
+ let mut fields = vec![0; num_fields];
+ AStatsManager_PullAtomMetadata_getAdditiveFields(self.metadata, fields.as_mut_ptr());
+ fields
+ }
+ }
+}
+
+impl Drop for Metadata {
+ fn drop(&mut self) {
+ // Safety: Metadata::new ensures that self.metadata is a valid object.
+ unsafe { AStatsManager_PullAtomMetadata_release(self.metadata) }
+ }
+}
+
+impl Default for Metadata {
+ fn default() -> Self {
+ Self::new()
+ }
+}
+
+lazy_static! {
+ static ref COOKIES: Mutex<HashMap<i32, fn() -> StatsPullResult>> = Mutex::new(HashMap::new());
+}
+
+// Safety: We store our callbacks in the global so they are valid.
+unsafe extern "C" fn callback_wrapper(
+ atom_tag: i32,
+ data: *mut AStatsEventList,
+ _cookie: *mut c_void,
+) -> AStatsManager_PullAtomCallbackReturn {
+ if !data.is_null() {
+ let map = COOKIES.lock().unwrap();
+ let cb = map.get(&atom_tag);
+ match cb {
+ None => log::error!("No callback found for {}", atom_tag),
+ Some(cb) => {
+ let stats = cb();
+ let result = stats
+ .iter()
+ .map(|stat| stat.add_astats_event(&mut *data))
+ .collect::<Result<Vec<()>, StatsError>>();
+ match result {
+ Ok(_) => {
+ return AStatsManager_PULL_SUCCESS as AStatsManager_PullAtomCallbackReturn
+ }
+ _ => log::error!("Error adding astats events: {:?}", result),
+ }
+ }
+ }
+ }
+ AStatsManager_PULL_SKIP as AStatsManager_PullAtomCallbackReturn
+}
+
+/// Rust wrapper for AStatsManager_setPullAtomCallback.
+pub fn set_pull_atom_callback(
+ atom: Atoms,
+ metadata: Option<&Metadata>,
+ callback: fn() -> StatsPullResult,
+) {
+ COOKIES.lock().unwrap().insert(atom as i32, callback);
+ let metadata_raw = match metadata {
+ Some(m) => m.metadata,
+ None => std::ptr::null_mut(),
+ };
+ // Safety: We pass a valid function as the callback.
+ unsafe {
+ AStatsManager_setPullAtomCallback(
+ atom as i32,
+ metadata_raw,
+ Some(callback_wrapper),
+ std::ptr::null_mut(),
+ );
+ }
+}
+
+/// Rust wrapper for AStatsManager_clearPullAtomCallback.
+pub fn clear_pull_atom_callback(atom: Atoms) {
+ COOKIES.lock().unwrap().remove(&(atom as i32));
+ // Safety: No memory allocations.
+ unsafe { AStatsManager_clearPullAtomCallback(atom as i32) }
+}
diff --git a/libstats/pull_rust/statslog.h b/libstats/pull_rust/statslog.h
new file mode 100644
index 0000000..983fb7b
--- /dev/null
+++ b/libstats/pull_rust/statslog.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#include "stats_pull_atom_callback.h"