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Add support for compiling against MUSL #34

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Add support for compiling against MUSL #34

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13 changes: 10 additions & 3 deletions Sources/SystemMetrics/SystemMetrics.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -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?

Expand Down Expand Up @@ -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()
Expand Down Expand Up @@ -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
Expand All @@ -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)
Expand Down
4 changes: 3 additions & 1 deletion Tests/SystemMetricsTests/SystemMetricsTests.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -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 {
Expand Down