From cbc32afb654d89fb1d3a39c18624ff37a775e86b Mon Sep 17 00:00:00 2001
From: huang <2971803929@qq.com>
Date: Thu, 19 Sep 2024 23:59:11 +0800
Subject: [PATCH 1/2] implement NumFDs for Windows

---
 process/process_windows.go | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/process/process_windows.go b/process/process_windows.go
index 52e1086f7..f8fa2f456 100644
--- a/process/process_windows.go
+++ b/process/process_windows.go
@@ -43,6 +43,7 @@ var (
 	procGetPriorityClass           = common.Modkernel32.NewProc("GetPriorityClass")
 	procGetProcessIoCounters       = common.Modkernel32.NewProc("GetProcessIoCounters")
 	procGetNativeSystemInfo        = common.Modkernel32.NewProc("GetNativeSystemInfo")
+	procGetProcessHandleCount      = common.Modkernel32.NewProc("GetProcessHandleCount")
 
 	processorArchitecture uint
 )
@@ -549,7 +550,18 @@ func (p *Process) NumCtxSwitchesWithContext(ctx context.Context) (*NumCtxSwitche
 }
 
 func (p *Process) NumFDsWithContext(ctx context.Context) (int32, error) {
-	return 0, common.ErrNotImplementedError
+	handle, err := windows.OpenProcess(processQueryInformation, false, uint32(p.Pid))
+	if err != nil {
+		return 0, err
+	}
+	defer windows.CloseHandle(handle)
+
+	var handleCount uint32
+	ret, _, err := procGetProcessHandleCount.Call(uintptr(handle), uintptr(unsafe.Pointer(&handleCount)))
+	if ret == 0 {
+		return 0, err
+	}
+	return int32(handleCount), nil
 }
 
 func (p *Process) NumThreadsWithContext(ctx context.Context) (int32, error) {

From 462736cb8b6c3a0bce352908303593e649491993 Mon Sep 17 00:00:00 2001
From: huang <2971803929@qq.com>
Date: Mon, 23 Sep 2024 22:05:49 +0800
Subject: [PATCH 2/2] add comment for NumFDsWithContext

---
 process/process_windows.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/process/process_windows.go b/process/process_windows.go
index f8fa2f456..b00c671e9 100644
--- a/process/process_windows.go
+++ b/process/process_windows.go
@@ -549,6 +549,8 @@ func (p *Process) NumCtxSwitchesWithContext(ctx context.Context) (*NumCtxSwitche
 	return nil, common.ErrNotImplementedError
 }
 
+// NumFDsWithContext returns the number of handles for a process on Windows,
+// not the number of file descriptors (FDs).
 func (p *Process) NumFDsWithContext(ctx context.Context) (int32, error) {
 	handle, err := windows.OpenProcess(processQueryInformation, false, uint32(p.Pid))
 	if err != nil {