Add vendoring

vendor/github.com/VictoriaMetrics/metrics/process_metrics_windows.go

@@ -0,0 +1,83 @@
+//go:build windows
+
+package metrics
+
+import (
+	"io"
+	"log"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+var (
+	modpsapi    = syscall.NewLazyDLL("psapi.dll")
+	modkernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+	// https://learn.microsoft.com/en-us/windows/win32/api/psapi/nf-psapi-getprocessmemoryinfo
+	procGetProcessMemoryInfo  = modpsapi.NewProc("GetProcessMemoryInfo")
+	procGetProcessHandleCount = modkernel32.NewProc("GetProcessHandleCount")
+)
+
+// https://learn.microsoft.com/en-us/windows/win32/api/psapi/ns-psapi-process_memory_counters_ex
+type processMemoryCounters struct {
+	_                          uint32
+	PageFaultCount             uint32
+	PeakWorkingSetSize         uintptr
+	WorkingSetSize             uintptr
+	QuotaPeakPagedPoolUsage    uintptr
+	QuotaPagedPoolUsage        uintptr
+	QuotaPeakNonPagedPoolUsage uintptr
+	QuotaNonPagedPoolUsage     uintptr
+	PagefileUsage              uintptr
+	PeakPagefileUsage          uintptr
+	PrivateUsage               uintptr
+}
+
+func writeProcessMetrics(w io.Writer) {
+	h := windows.CurrentProcess()
+	var startTime, exitTime, stime, utime windows.Filetime
+	err := windows.GetProcessTimes(h, &startTime, &exitTime, &stime, &utime)
+	if err != nil {
+		log.Printf("ERROR: metrics: cannot read process times: %s", err)
+		return
+	}
+	var mc processMemoryCounters
+	r1, _, err := procGetProcessMemoryInfo.Call(
+		uintptr(h),
+		uintptr(unsafe.Pointer(&mc)),
+		unsafe.Sizeof(mc),
+	)
+	if r1 != 1 {
+		log.Printf("ERROR: metrics: cannot read process memory information: %s", err)
+		return
+	}
+	stimeSeconds := float64(uint64(stime.HighDateTime)<<32+uint64(stime.LowDateTime)) / 1e7
+	utimeSeconds := float64(uint64(utime.HighDateTime)<<32+uint64(utime.LowDateTime)) / 1e7
+	WriteCounterFloat64(w, "process_cpu_seconds_system_total", stimeSeconds)
+	WriteCounterFloat64(w, "process_cpu_seconds_total", stimeSeconds+utimeSeconds)
+	WriteCounterFloat64(w, "process_cpu_seconds_user_total", stimeSeconds)
+	WriteCounterUint64(w, "process_pagefaults_total", uint64(mc.PageFaultCount))
+	WriteGaugeUint64(w, "process_start_time_seconds", uint64(startTime.Nanoseconds())/1e9)
+	WriteGaugeUint64(w, "process_virtual_memory_bytes", uint64(mc.PrivateUsage))
+	WriteGaugeUint64(w, "process_resident_memory_peak_bytes", uint64(mc.PeakWorkingSetSize))
+	WriteGaugeUint64(w, "process_resident_memory_bytes", uint64(mc.WorkingSetSize))
+}
+
+func writeFDMetrics(w io.Writer) {
+	h := windows.CurrentProcess()
+	var count uint32
+	r1, _, err := procGetProcessHandleCount.Call(
+		uintptr(h),
+		uintptr(unsafe.Pointer(&count)),
+	)
+	if r1 != 1 {
+		log.Printf("ERROR: metrics: cannot determine open file descriptors count: %s", err)
+		return
+	}
+	// it seems to be hard-coded limit for 64-bit systems
+	// https://learn.microsoft.com/en-us/archive/blogs/markrussinovich/pushing-the-limits-of-windows-handles#maximum-number-of-handles
+	WriteGaugeUint64(w, "process_max_fds", 16777216)
+	WriteGaugeUint64(w, "process_open_fds", uint64(count))
+}