oxedyne/fe2o3 — fe2o3_core/src/mem.rs

1.1 KiB, 6 runs

created by r1870400018:110, which is this file's identity for as long as the history lasts, whatever it is later renamed to

1	/// Credit: https://stackoverflow.com/users/4498831/boiethios
2	/// https://stackoverflow.com/questions/57685567/how-to-move-values-out-of-a-vector-when-the-vector-is-immediately-discarded
3	pub trait Extract: Default {
4	fn extract(&mut self) -> Self;
5	}
6
7	impl<T: Default> Extract for T {
8	fn extract(&mut self) -> Self {
9	std::mem::replace(self, T::default())
10	}
11	}
12
13	/// Gets current memory usage in MB.
14	///
15	/// Returns the current process memory usage (VmRSS) in megabytes.
16	/// On non-Linux systems or if unable to read memory stats, returns 0.0.
17	pub fn get_memory_usage_mb() -> f32 {
18	// Simple approach: read from /proc/self/status on Linux.
19	if let Ok(status) = std::fs::read_to_string("/proc/self/status") {
20	for line in status.lines() {
21	if line.starts_with("VmRSS:") {
22	if let Some(kb_str) = line.split_whitespace().nth(1) {
23	if let Ok(kb) = kb_str.parse::<u64>() {
24	return kb as f32 / 1024.0; // Convert KB to MB.
25	}
26	}
27	}
28	}
29	}
30
31	// Fallback: return 0 if we can't read memory usage.
32	0.0
33	}