refactor: Simplify data harvesting (#335)

Refactors the data harvesting system function names.

8 files changed, 266 insertions, 47 deletions

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 5decc229..8d157fab 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -92,6 +92,7 @@
     "rustflags",
     "rustfmt",
     "shilangyu",
+    "smol",
     "softirq",
     "splitn",
     "statm",
diff --git a/Cargo.lock b/Cargo.lock
index d24e247f..f1522e9f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -53,6 +53,111 @@ dependencies = [
 ]
 
 [[package]]
+name = "async-channel"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59740d83946db6a5af71ae25ddf9562c2b176b2ca42cf99a455f09f4a220d6b9"
+dependencies = [
+ "concurrent-queue",
+ "event-listener",
+ "futures-core",
+]
+
+[[package]]
+name = "async-executor"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb877970c7b440ead138f6321a3b5395d6061183af779340b65e20c0fede9146"
+dependencies = [
+ "async-task",
+ "concurrent-queue",
+ "fastrand",
+ "futures-lite",
+ "once_cell",
+ "vec-arena",
+]
+
+[[package]]
+name = "async-fs"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b3ca4f8ff117c37c278a2f7415ce9be55560b846b5bc4412aaa5d29c1c3dae2"
+dependencies = [
+ "async-lock",
+ "blocking",
+ "futures-lite",
+]
+
+[[package]]
+name = "async-io"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "458c8f66c246624e7cf87c01451f3392ab77d66a0f105a49d9353b30ea97ced8"
+dependencies = [
+ "concurrent-queue",
+ "fastrand",
+ "futures-lite",
+ "libc",
+ "log",
+ "nb-connect",
+ "once_cell",
+ "parking",
+ "polling",
+ "vec-arena",
+ "waker-fn",
+ "winapi",
+]
+
+[[package]]
+name = "async-lock"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1996609732bde4a9988bc42125f55f2af5f3c36370e27c778d5191a4a1b63bfb"
+dependencies = [
+ "event-listener",
+]
+
+[[package]]
+name = "async-net"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06de475c85affe184648202401d7622afb32f0f74e02192857d0201a16defbe5"
+dependencies = [
+ "async-io",
+ "blocking",
+ "fastrand",
+ "futures-lite",
+]
+
+[[package]]
+name = "async-process"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c8cea09c1fb10a317d1b5af8024eeba256d6554763e85ecd90ff8df31c7bbda"
+dependencies = [
+ "async-io",
+ "blocking",
+ "cfg-if 0.1.10",
+ "event-listener",
+ "futures-lite",
+ "once_cell",
+ "signal-hook",
+ "winapi",
+]
+
+[[package]]
+name = "async-task"
+version = "4.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e91831deabf0d6d7ec49552e489aed63b7456a7a3c46cff62adad428110b0af0"
+
+[[package]]
+name = "atomic-waker"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "065374052e7df7ee4047b1160cca5e1467a12351a40b3da123c870ba0b8eda2a"
+
+[[package]]
 name = "atty"
 version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -107,6 +212,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
+name = "blocking"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c5e170dbede1f740736619b776d7251cb1b9095c435c34d8ca9f57fcd2f335e9"
+dependencies = [
+ "async-channel",
+ "async-task",
+ "atomic-waker",
+ "fastrand",
+ "futures-lite",
+ "once_cell",
+]
+
+[[package]]
 name = "bottom"
 version = "0.5.3"
 dependencies = [
@@ -115,7 +234,6 @@ dependencies = [
  "backtrace",
  "battery",
  "cargo-husky",
- "cfg-if 1.0.0",
  "chrono",
  "clap",
  "crossterm",
@@ -132,6 +250,7 @@ dependencies = [
  "predicates",
  "regex",
  "serde",
+ "smol",
  "sysinfo",
  "thiserror",
  "toml",
@@ -143,6 +262,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "cache-padded"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "631ae5198c9be5e753e5cc215e1bd73c2b466a3565173db433f52bb9d3e66dba"
+
+[[package]]
 name = "cargo-husky"
 version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -210,6 +335,15 @@ dependencies = [
 ]
 
 [[package]]
+name = "concurrent-queue"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30ed07550be01594c6026cff2a1d7fe9c8f683caa798e12b68694ac9e88286a3"
+dependencies = [
+ "cache-padded",
+]
+
+[[package]]
 name = "const_fn"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -373,6 +507,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
 [[package]]
+name = "event-listener"
+version = "2.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7531096570974c3a9dcf9e4b8e1cede1ec26cf5046219fb3b9d897503b9be59"
+
+[[package]]
+name = "fastrand"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca5faf057445ce5c9d4329e382b2ce7ca38550ef3b73a5348362d5f24e0c7fe3"
+dependencies = [
+ "instant",
+]
+
+[[package]]
 name = "fern"
 version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -439,6 +588,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "611834ce18aaa1bd13c4b374f5d653e1027cf99b6b502584ff8c9a64413b30bb"
 
 [[package]]
+name = "futures-lite"
+version = "1.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e6c079abfac3ab269e2927ec048dabc89d009ebfdda6b8ee86624f30c689658"
+dependencies = [
+ "fastrand",
+ "futures-core",
+ "futures-io",
+ "memchr",
+ "parking",
+ "pin-project-lite",
+ "waker-fn",
+]
+
+[[package]]
 name = "futures-macro"
 version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -825,6 +989,16 @@ dependencies = [
 ]
 
 [[package]]
+name = "nb-connect"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8123a81538e457d44b933a02faf885d3fe8408806b23fa700e8f01c6c3a98998"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
 name = "nix"
 version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -938,6 +1112,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "parking"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "427c3892f9e783d91cc128285287e70a59e206ca452770ece88a76f7a3eddd72"
+
+[[package]]
 name = "parking_lot"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -984,6 +1164,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "pin-project-lite"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c917123afa01924fc84bb20c4c03f004d9c38e5127e3c039bbf7f4b9c76a2f6b"
+
+[[package]]
 name = "pin-utils"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -996,6 +1182,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "feb3b2b1033b8a60b4da6ee470325f887758c95d5320f52f9ce0df055a55940e"
 
 [[package]]
+name = "polling"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2a7bc6b2a29e632e45451c941832803a18cce6781db04de8a04696cdca8bde4"
+dependencies = [
+ "cfg-if 0.1.10",
+ "libc",
+ "log",
+ "wepoll-sys",
+ "winapi",
+]
+
+[[package]]
 name = "predicates"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1213,6 +1412,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fbee7696b84bbf3d89a1c2eccff0850e3047ed46bfcd2e92c29a2d074d57e252"
 
 [[package]]
+name = "smol"
+version = "1.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85cf3b5351f3e783c1d79ab5fc604eeed8b8ae9abd36b166e8b87a089efd85e4"
+dependencies = [
+ "async-channel",
+ "async-executor",
+ "async-fs",
+ "async-io",
+ "async-lock",
+ "async-net",
+ "async-process",
+ "blocking",
+ "futures-lite",
+ "once_cell",
+]
+
+[[package]]
 name = "socket2"
 version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1389,6 +1606,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "vec-arena"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eafc1b9b2dfc6f5529177b62cf806484db55b32dc7c9658a118e11bbeb33061d"
+
+[[package]]
 name = "vec_map"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1410,6 +1633,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "waker-fn"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d5b2c62b4012a3e1eca5a7e077d13b3bf498c4073e33ccd58626607748ceeca"
+
+[[package]]
 name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1422,6 +1651,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
 
 [[package]]
+name = "wepoll-sys"
+version = "3.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fcb14dea929042224824779fbc82d9fab8d2e6d3cbc0ac404de8edf489e77ff"
+dependencies = [
+ "cc",
+]
+
+[[package]]
 name = "widestring"
 version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/Cargo.toml b/Cargo.toml
index 519a1e57..62e72140 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,6 @@ codegen-units = 1
 anyhow = "1.0.34"
 backtrace = "0.3"
 battery = "0.7.8"
-cfg-if = "1.0.0"
 chrono = "0.4.19"
 crossterm = "0.18.2"
 ctrlc = {version = "3.1", features = ["termination"]}
@@ -40,6 +39,7 @@ libc = "0.2"
 once_cell = "1.5.2"
 regex = "1.4.2"
 serde = {version = "1.0", features = ["derive"] }
+smol = "1.2.5"
 sysinfo = "0.15.3"
 thiserror = "1.0.22"
 toml = "0.5.7"
diff --git a/src/app/data_harvester.rs b/src/app/data_harvester.rs
index 2e46559a..0f59b54f 100644
--- a/src/app/data_harvester.rs
+++ b/src/app/data_harvester.rs
@@ -236,13 +236,10 @@ impl DataCollector {
         }
 
         if self.widgets_to_harvest.use_proc {
-            // Processes.  This is the longest part of the harvesting process... changing this might be
-            // good in the future.  What was tried already:
-            // * Splitting the internal part into multiple scoped threads (dropped by ~.01 seconds, but upped usage)
-            if let Ok(process_list) = if cfg!(target_os = "linux") {
+            if let Ok(process_list) = {
                 #[cfg(target_os = "linux")]
                 {
-                    processes::linux_processes(
+                    processes::get_process_data(
                         &mut self.prev_idle,
                         &mut self.prev_non_idle,
                         &mut self.pid_mapping,
@@ -256,21 +253,12 @@ impl DataCollector {
                 }
                 #[cfg(not(target_os = "linux"))]
                 {
-                    Ok(Vec::new())
-                }
-            } else {
-                #[cfg(not(target_os = "linux"))]
-                {
-                    processes::windows_macos_processes(
+                    processes::get_process_data(
                         &self.sys,
                         self.use_current_cpu_total,
                         self.mem_total_kb,
                     )
                 }
-                #[cfg(target_os = "linux")]
-                {
-                    Ok(Vec::new())
-                }
             } {
                 self.data.list_of_processes = Some(process_list);
             }
@@ -288,7 +276,7 @@ impl DataCollector {
         let network_data_fut = {
             #[cfg(any(target_os = "windows", target_arch = "aarch64", target_arch = "arm"))]
             {
-                network::arm_or_windows_network_data(
+                network::get_network_data(
                     &self.sys,
                     self.last_collection_time,
                     &mut self.total_rx,
@@ -299,7 +287,7 @@ impl DataCollector {
             }
             #[cfg(not(any(target_os = "windows", target_arch = "aarch64", target_arch = "arm")))]
             {
-                network::non_arm_or_windows_network_data(
+                network::get_network_data(
                     self.last_collection_time,
                     &mut self.total_rx,
                     &mut self.total_tx,
@@ -311,45 +299,45 @@ impl DataCollector {
         let mem_data_fut = {
             #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
             {
-                mem::arm_mem_data(&self.sys, self.widgets_to_harvest.use_mem)
+                mem::get_mem_data(&self.sys, self.widgets_to_harvest.use_mem)
             }
 
             #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
             {
-                mem::non_arm_mem_data(self.widgets_to_harvest.use_mem)
+                mem::get_mem_data(self.widgets_to_harvest.use_mem)
             }
         };
         let swap_data_fut = {
             #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
             {
-                mem::arm_swap_data(&self.sys, self.widgets_to_harvest.use_mem)
+                mem::get_swap_data(&self.sys, self.widgets_to_harvest.use_mem)
             }
 
             #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
             {
-                mem::non_arm_swap_data(self.widgets_to_harvest.use_mem)
+                mem::get_swap_data(self.widgets_to_harvest.use_mem)
             }
         };
         let disk_data_fut = {
             #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
             {
-                disks::arm_disk_usage(&self.sys, self.widgets_to_harvest.use_disk)
+                disks::get_disk_usage(&self.sys, self.widgets_to_harvest.use_disk)
             }
 
             #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
             {
-                disks::non_arm_disk_usage(self.widgets_to_harvest.use_disk)
+                disks::get_disk_usage(self.widgets_to_harvest.use_disk)
             }
         };
         let disk_io_usage_fut = {
             #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
             {
-                disks::arm_io_usage(&self.sys, self.widgets_to_harvest.use_disk)
+                disks::get_io_usage(&self.sys, self.widgets_to_harvest.use_disk)
             }
 
             #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
             {
-                disks::non_arm_io_usage(false, self.widgets_to_harvest.use_disk)
+                disks::get_io_usage(false, self.widgets_to_harvest.use_disk)
             }
         };
         let temp_data_fut = {
diff --git a/src/app/data_harvester/disks.rs b/src/app/data_harvester/disks.rs
index 59e9d13c..cb7ca0f4 100644
--- a/src/app/data_harvester/disks.rs
+++ b/src/app/data_harvester/disks.rs
@@ -18,9 +18,8 @@ pub struct IOData {
 
 pub type IOHarvest = std::collections::HashMap<String, Option<IOData>>;
 
-/// Meant for ARM use.
 #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
-pub async fn arm_io_usage(
+pub async fn get_io_usage(
     _sys: &sysinfo::System, _actually_get: bool,
 ) -> crate::utils::error::Result<Option<IOHarvest>> {
     let io_hash: std::collections::HashMap<String, Option<IOData>> =
@@ -32,9 +31,8 @@ pub async fn arm_io_usage(
     // work.  See https://github.com/GuillaumeGomez/sysinfo/issues/304.
 }
 
-/// Meant for ARM use.
 #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
-pub async fn arm_disk_usage(
+pub async fn get_disk_usage(
     sys: &sysinfo::System, actually_get: bool,
 ) -> crate::utils::error::Result<Option<Vec<DiskHarvest>>> {
     use sysinfo::{DiskExt, SystemExt};
@@ -61,7 +59,7 @@ pub async fn arm_disk_usage(
 }
 
 #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
-pub async fn non_arm_io_usage(
+pub async fn get_io_usage(
     get_physical: bool, actually_get: bool,
 ) -> crate::utils::error::Result<Option<IOHarvest>> {
     if !actually_get {
@@ -104,7 +102,7 @@ pub async fn non_arm_io_usage(
 }
 
 #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
-pub async fn non_arm_disk_usage(
+pub async fn get_disk_usage(
     actually_get: bool,
 ) -> crate::utils::error::Result<Option<Vec<DiskHarvest>>> {
     if !actually_get {
diff --git a/src/app/data_harvester/mem.rs b/src/app/data_harvester/mem.rs
index e108e867..5f91b40e 100644
--- a/src/app/data_harvester/mem.rs
+++ b/src/app/data_harvester/mem.rs
@@ -13,9 +13,8 @@ impl Default for MemHarvest {
     }
 }
 
-/// Meant for ARM use.
 #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
-pub async fn arm_mem_data(
+pub async fn get_mem_data(
     sys: &sysinfo::System, actually_get: bool,
 ) -> crate::utils::error::Result<Option<MemHarvest>> {
     use sysinfo::SystemExt;
@@ -29,9 +28,8 @@ pub async fn arm_mem_data(
     }))
 }
 
-/// Meant for ARM use.
 #[cfg(any(target_arch = "aarch64", target_arch = "arm"))]
-pub async fn arm_swap_data(
+pub async fn get_swap_data(
     sys: &sysinfo::System, actually_get: bool,
 ) -> crate::utils::error::Result<Option<MemHarvest>> {
     use sysinfo::SystemExt;
@@ -46,9 +44,7 @@ pub async fn arm_swap_data(
 }
 
 #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
-pub async fn non_arm_mem_data(
-    actually_get: bool,
-) -> crate::utils::error::Result<Option<MemHarvest>> {
+pub async fn get_mem_data(actually_get: bool) -> crate::utils::error::Result<Option<MemHarvest>> {
     if !actually_get {
         return Ok(None);
     }
@@ -65,9 +61,7 @@ pub async fn non_arm_mem_data(
 }
 
 #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))]
-pub async fn non_arm_swap_data(
-    actually_get: bool,
-) -> crate::utils::error::Result<Option<MemHarvest>> {
+pub async fn get_swap_data(actually_get: bool) -> crate::utils::error::Result<Option<MemHarvest>> {
     if !actually_get {
         return Ok(None);
     }
diff --git a/src/app/data_harvester/network.rs b/src/app/data_harvester/network.rs
index 95e15476..9b37fc7a 100644
--- a/src/app/data_harvester/network.rs
+++ b/src/app/data_harvester/network.rs
@@ -17,7 +17,7 @@ impl NetworkHarvest {
 
 /// Meant for Windows and ARM use.
 #[cfg(any(target_os = "windows", target_arch = "aarch64", target_arch = "arm"))]
-pub async fn arm_or_windows_network_data(
+pub async fn get_network_data(
     sys: &sysinfo::System, prev_net_access_time: Instant, prev_net_rx: &mut u64,
     prev_net_tx: &mut u64, curr_time: Instant, actually_get: bool,
 ) -> Option<NetworkHarvest> {
@@ -58,7 +58,7 @@ pub async fn arm_or_windows_network_data(
 }
 
 #[cfg(not(any(target_os = "windows", target_arch = "aarch64", target_arch = "arm")))]
-pub async fn non_arm_or_windows_network_data(
+pub async fn get_network_data(
     prev_net_access_time: Instant, prev_net_rx: &mut u64, prev_net_tx: &mut u64,
     curr_time: Instant, actually_get: bool,
 ) -> Option<NetworkHarvest> {
diff --git a/src/app/data_harvester/processes.rs b/src/app/data_harvester/processes.rs
index a182db23..a79f8585 100644
--- a/src/app/data_harvester/processes.rs
+++ b/src/app/data_harvester/processes.rs
@@ -369,7 +369,7 @@ fn read_proc<S: core::hash::BuildHasher>(
 }
 
 #[cfg(target_os = "linux")]
-pub fn linux_processes(
+pub fn get_process_data(
     prev_idle: &mut f64, prev_non_idle: &mut f64,
     pid_mapping: &mut HashMap<Pid, PrevProcDetails, RandomState>, use_current_cpu_total: bool,
     time_difference_in_secs: u64, mem_total_kb: u64, page_file_kb: u64,
@@ -409,7 +409,7 @@ pub fn linux_processes(
 }
 
 #[cfg(not(target_os = "linux"))]
-pub fn windows_macos_processes(
+pub fn get_process_data(
     sys: &System, use_current_cpu_total: bool, mem_total_kb: u64,
 ) -> crate::utils::error::Result<Vec<ProcessHarvest>> {
     let mut process_vector: Vec<ProcessHarvest> = Vec::new();