Added support for remote0

internal/hwinfo/shmem/shmem.go

@@ -0,0 +1,95 @@
+package shmem
+
+/*
+#include <windows.h>
+#include "../hwisenssm2.h"
+*/
+import "C"
+
+import (
+	"fmt"
+	"reflect"
+	"syscall"
+	"unsafe"
+
+	"github.com/shayne/hwinfo-streamdeck/internal/hwinfo/mutex"
+	"github.com/shayne/hwinfo-streamdeck/internal/hwinfo/util"
+	"golang.org/x/sys/windows"
+)
+
+var buf = make([]byte, 200000)
+
+func copyBytes(addr uintptr) []byte {
+	headerLen := C.sizeof_HWiNFO_SENSORS_SHARED_MEM2
+
+	var d []byte
+	dh := (*reflect.SliceHeader)(unsafe.Pointer(&d))
+
+	dh.Data = addr
+	dh.Len, dh.Cap = headerLen, headerLen
+
+	cheader := C.PHWiNFO_SENSORS_SHARED_MEM2(unsafe.Pointer(&d[0]))
+	fullLen := int(cheader.dwOffsetOfReadingSection + (cheader.dwSizeOfReadingElement * cheader.dwNumReadingElements))
+
+	if fullLen > cap(buf) {
+		buf = append(buf, make([]byte, fullLen-cap(buf))...)
+	}
+
+	dh.Len, dh.Cap = fullLen, fullLen
+
+	copy(buf, d)
+
+	return buf[:fullLen]
+}
+
+// ReadBytes copies bytes from global shared memory
+func ReadBytes() ([]byte, error) {
+	err := mutex.Lock()
+	defer mutex.Unlock()
+	if err != nil {
+		return nil, err
+	}
+
+	hnd, err := openFileMapping()
+	if err != nil {
+		return nil, err
+	}
+	addr, err := mapViewOfFile(hnd)
+	if err != nil {
+		return nil, err
+	}
+	defer unmapViewOfFile(addr)
+	defer windows.CloseHandle(windows.Handle(unsafe.Pointer(hnd)))
+
+	return copyBytes(addr), nil
+}
+
+func openFileMapping() (C.HANDLE, error) {
+	lpName := C.CString("Global\\HWiNFO_SENS_SM2_REMOTE_0")
+	defer C.free(unsafe.Pointer(lpName))
+
+	hnd := C.OpenFileMapping(syscall.FILE_MAP_READ, 0, lpName)
+	if hnd == C.HANDLE(C.NULL) {
+		errstr := util.HandleLastError(uint64(C.GetLastError()))
+		return nil, fmt.Errorf("OpenFileMapping: %w", errstr)
+	}
+
+	return hnd, nil
+}
+
+func mapViewOfFile(hnd C.HANDLE) (uintptr, error) {
+	addr, err := windows.MapViewOfFile(windows.Handle(unsafe.Pointer(hnd)), C.FILE_MAP_READ, 0, 0, 0)
+	if err != nil {
+		return 0, fmt.Errorf("MapViewOfFile: %w", err)
+	}
+
+	return addr, nil
+}
+
+func unmapViewOfFile(ptr uintptr) error {
+	err := windows.UnmapViewOfFile(ptr)
+	if err != nil {
+		return fmt.Errorf("UnmapViewOfFile: %w", err)
+	}
+	return nil
+}