src,unix: expose cpu total_time

This change exposes cpu total_time for the manual cpu method. This
change is required to expose cpu usage seconds in metrics.

Updates edera-dev/protect#1107

Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@edera.dev>

Author: Charlotte Brandhorst-Satzkorn

src/common/system.rs

@@ -2334,7 +2334,7 @@ pub enum ProcessesToUpdate<'a> {
 /// information from `/proc/<pid>/` as well as all the information from `/proc/<pid>/task/<tid>/`
 /// folders. This makes the refresh mechanism a lot slower depending on the number of tasks
 /// each process has.
-///  
+///
 /// If you don't care about tasks information, use `ProcessRefreshKind::everything().without_tasks()`
 /// as much as possible.
 ///
@@ -2777,6 +2777,22 @@ impl Cpu {
         self.inner.cpu_usage()
     }
 
+    /// Returns this CPU's total_time.
+    ///
+    /// ```no_run
+    /// use sysinfo::{System, RefreshKind, CpuRefreshKind};
+    ///
+    /// let s = System::new_with_specifics(
+    ///     RefreshKind::nothing().with_cpu(CpuRefreshKind::everything()),
+    /// );
+    /// for cpu in s.cpus() {
+    ///     println!("{}", cpu.cpu_total_time());
+    /// }
+    /// ```
+    pub fn cpu_total_time(&self) -> u64 {
+        self.inner.cpu_total_time()
+    }
+
     /// Returns this CPU's name.
     ///
     /// ```no_run

src/unix/apple/cpu.rs

@@ -115,6 +115,7 @@ pub(crate) struct CpuUsage {
     data: Arc<CpuData>,
     // Cannot be frequency for each CPU apparently so we store it in the CPU usage...
     frequency: u64,
+    total_time: u64,
 }
 
 impl CpuUsage {
@@ -123,13 +124,18 @@ impl CpuUsage {
             percent: 0.,
             data: Arc::new(CpuData::new(std::ptr::null_mut(), 0)),
             frequency: 0,
+            total_time: 0,
         }
     }
 
     pub(crate) fn percent(&self) -> f32 {
         self.percent
     }
 
+    pub(crate) fn total_time(&self) -> u64 {
+        self.total_time
+    }
+
     pub(crate) fn set_cpu_usage(&mut self, value: f32) {
         self.percent = value;
     }
@@ -149,13 +155,15 @@ impl CpuInner {
         frequency: u64,
         vendor_id: String,
         brand: String,
+        total_time: u64,
     ) -> Self {
         Self {
             name,
             usage: CpuUsage {
                 percent: 0.,
                 data: cpu_data,
                 frequency,
+                total_time,
             },
             vendor_id,
             brand,
@@ -183,6 +191,10 @@ impl CpuInner {
         self.usage.percent()
     }
 
+    pub(crate) fn cpu_total_time(&self) -> u64 {
+        self.usage.total_time()
+    }
+
     pub(crate) fn name(&self) -> &str {
         &self.name
     }

src/unix/freebsd/cpu.rs

@@ -135,6 +135,10 @@ impl CpuInner {
         self.cpu_usage
     }
 
+    pub(crate) fn cpu_total_time(&self) -> u64 {
+        self.usage.total_time()
+    }
+
     pub(crate) fn name(&self) -> &str {
         &self.name
     }

src/unix/linux/cpu.rs

@@ -395,6 +395,10 @@ impl CpuInner {
         self.usage.percent
     }
 
+    pub(crate) fn cpu_total_time(&self) -> u64 {
+        self.usage.total_time
+    }
+
     pub(crate) fn name(&self) -> &str {
         &self.name
     }

src/unknown/cpu.rs

@@ -7,6 +7,10 @@ impl CpuInner {
         0.0
     }
 
+    pub(crate) fn cpu_total_time(&self) -> u64 {
+        0
+    }
+
     pub(crate) fn name(&self) -> &str {
         ""
     }

src/windows/cpu.rs

@@ -308,6 +308,7 @@ impl CpusWrapper {
 
 pub(crate) struct CpuUsage {
     percent: f32,
+    total_time: u64,
     pub(crate) key_used: Option<KeyHandler>,
 }
 
@@ -330,6 +331,10 @@ impl CpuInner {
         self.usage.percent
     }
 
+    pub(crate) fn cpu_total_time(&self) -> u64 {
+        self.usage.total_time()
+    }
+
     pub(crate) fn name(&self) -> &str {
         &self.name
     }