From ec05bb57dcde41428b27003dec674dcce87446af Mon Sep 17 00:00:00 2001
From: Jeroen van Rijn <Kelimion@users.noreply.github.com>
Date: Mon, 9 Feb 2026 18:16:16 +0100
Subject: [PATCH] Implement `get_processor_core_count` without libc for Linux.

---
 core/os/process_linux.odin | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/core/os/process_linux.odin b/core/os/process_linux.odin
index cfdb6774a..7f5608a51 100644
--- a/core/os/process_linux.odin
+++ b/core/os/process_linux.odin
@@ -57,8 +57,15 @@ _get_current_thread_id :: proc "contextless" () -> int {
 }
 
 @(private="package")
-_get_processor_core_count :: proc() -> int {
-	return int(_unix_get_nprocs())
+_get_processor_core_count :: proc() -> (core_count: int) {
+	cpu_set: [128]u64
+
+	if err := linux.sched_getaffinity(0, size_of(cpu_set), &cpu_set); err != linux.Errno(-1) {
+		for set in cpu_set {
+			core_count += int(intrinsics.count_ones(set))
+		}
+	}
+	return
 }
 
 @(private="package")