Adding upstream version 1:7.0.3.upstream/1%7.0.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/rust/vendor/num_threads/src/linux.rs b/rust/vendor/num_threads/src/linux.rs
new file mode 100644
index 0000000..641b6b1
--- /dev/null
+++ b/rust/vendor/num_threads/src/linux.rs
@@ -0,0 +1,14 @@
+use std::fs;
+use std::num::NonZeroUsize;
+
+pub(crate) fn num_threads() -> Option<NonZeroUsize> {
+    fs::read_to_string("/proc/self/stat")
+        .ok()
+        .as_ref()
+        // Skip past the pid and (process name) fields
+        .and_then(|stat| stat.rsplit(')').next())
+        // 20th field, less the two we skipped
+        .and_then(|rstat| rstat.split_whitespace().nth(17))
+        .and_then(|num_threads| num_threads.parse::<usize>().ok())
+        .and_then(NonZeroUsize::new)
+}