From 9b38cdda0e7d28d91a9ef1534df38c3310a70d4c Mon Sep 17 00:00:00 2001
From: Timo <38291523+lovetodream@users.noreply.github.com>
Date: Mon, 21 Oct 2024 13:12:52 +0200
Subject: [PATCH] add support for compiling against musl

---
 Sources/SystemMetrics/SystemMetrics.swift         | 13 ++++++++++---
 Tests/SystemMetricsTests/SystemMetricsTests.swift |  4 +++-
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/Sources/SystemMetrics/SystemMetrics.swift b/Sources/SystemMetrics/SystemMetrics.swift
index 7887ca9..d7f4c73 100644
--- a/Sources/SystemMetrics/SystemMetrics.swift
+++ b/Sources/SystemMetrics/SystemMetrics.swift
@@ -14,10 +14,13 @@
 import CoreMetrics
 import Dispatch
 
-#if os(Linux)
+#if canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #endif
 
+
 extension MetricsSystem {
     fileprivate static var systemMetricsProvider: SystemMetricsProvider?
 
@@ -329,7 +332,7 @@ public enum SystemMetrics {
             static let stimeTicks = 12
         }
 
-        let ticks = _SC_CLK_TCK
+        let ticks = Int(_SC_CLK_TCK)
 
         let statFile = CFile("/proc/self/stat")
         statFile.open()
@@ -362,7 +365,7 @@ public enum SystemMetrics {
             let utimeTicks = Int(stats[safe: StatIndices.utimeTicks]),
             let stimeTicks = Int(stats[safe: StatIndices.stimeTicks])
         else { return nil }
-        let residentMemoryBytes = rss * _SC_PAGESIZE
+        let residentMemoryBytes = rss * Int(_SC_PAGESIZE)
         let processStartTimeInSeconds = startTimeTicks / ticks
         let cpuTicks = utimeTicks + stimeTicks
         let cpuSeconds = cpuTicks / ticks
@@ -384,7 +387,11 @@ public enum SystemMetrics {
 
         var _rlim = rlimit()
         guard withUnsafeMutablePointer(to: &_rlim, { ptr in
+            #if canImport(Musl)
+            getrlimit(RLIMIT_NOFILE, ptr) == 0
+            #else
             getrlimit(__rlimit_resource_t(RLIMIT_NOFILE.rawValue), ptr) == 0
+            #endif
         }) else { return nil }
 
         let maxFileDescriptors = Int(_rlim.rlim_max)
diff --git a/Tests/SystemMetricsTests/SystemMetricsTests.swift b/Tests/SystemMetricsTests/SystemMetricsTests.swift
index 62f15f1..d0e1e7c 100644
--- a/Tests/SystemMetricsTests/SystemMetricsTests.swift
+++ b/Tests/SystemMetricsTests/SystemMetricsTests.swift
@@ -13,8 +13,10 @@
 //===----------------------------------------------------------------------===//
 @testable import SystemMetrics
 import XCTest
-#if os(Linux)
+#if canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #endif
 
 class SystemMetricsTest: XCTestCase {