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darwin: wrap cgo-types directly (without using a struct)

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This makes easier the boxing/unboxing of the wrapped types.
This commit is contained in:
Cristian Maglie
2023-08-07 13:33:41 +02:00
parent c1ded5fc98
commit c9a9ed456d
1 changed files with 47 additions and 54 deletions
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101
enumerator/usb_darwin.go
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@@ -28,7 +28,7 @@ func nativeGetDetailedPortsList() ([]*PortDetails, error) {
for _, service := range services { for _, service := range services {
defer service.Release() defer service.Release()
port, err := extractPortInfo(&io_registry_entry_t{ioregistryentry: service.ioobject}) port, err := extractPortInfo(io_registry_entry_t(service))
if err != nil { if err != nil {
return nil, &PortEnumerationError{causedBy: err} return nil, &PortEnumerationError{causedBy: err}
} }
@@ -37,7 +37,7 @@ func nativeGetDetailedPortsList() ([]*PortDetails, error) {
return ports, nil return ports, nil
} }
func extractPortInfo(service *io_registry_entry_t) (*PortDetails, error) { func extractPortInfo(service io_registry_entry_t) (*PortDetails, error) {
port := &PortDetails{} port := &PortDetails{}
// If called too early the port may still not be ready or fully enumerated // If called too early the port may still not be ready or fully enumerated
// so we retry 5 times before returning error. // so we retry 5 times before returning error.
@@ -58,18 +58,12 @@ func extractPortInfo(service *io_registry_entry_t) (*PortDetails, error) {
"IOUSBDevice": true, "IOUSBDevice": true,
"IOUSBHostDevice": true, "IOUSBHostDevice": true,
} }
usbDevice := service
var ( var searchErr error
usbDevice = io_registry_entry_t{service.ioregistryentry} for !validUSBDeviceClass[usbDevice.GetClass()] {
usbDeviceObj = io_object_t{usbDevice.ioregistryentry}
searchErr error
)
for !validUSBDeviceClass[usbDeviceObj.GetClass()] {
if usbDevice, searchErr = usbDevice.GetParent("IOService"); searchErr != nil { if usbDevice, searchErr = usbDevice.GetParent("IOService"); searchErr != nil {
break break
} }
usbDeviceObj = io_object_t{usbDevice.ioregistryentry}
} }
if searchErr == nil { if searchErr == nil {
// It's an IOUSBDevice // It's an IOUSBDevice
@@ -100,7 +94,7 @@ func getAllServices(serviceType string) ([]io_object_t, error) {
for tries < 5 { for tries < 5 {
// Extract all elements from iterator // Extract all elements from iterator
if service, ok := i.Next(); ok { if service, ok := i.Next(); ok {
services = append(services, *service) services = append(services, service)
continue continue
} }
// If iterator is still valid return the result // If iterator is still valid return the result
@@ -131,64 +125,57 @@ func getMatchingServices(matcher C.CFMutableDictionaryRef) (io_iterator_t, error
var i C.io_iterator_t var i C.io_iterator_t
err := C.IOServiceGetMatchingServices(C.kIOMasterPortDefault, C.CFDictionaryRef(matcher), &i) err := C.IOServiceGetMatchingServices(C.kIOMasterPortDefault, C.CFDictionaryRef(matcher), &i)
if err != C.KERN_SUCCESS { if err != C.KERN_SUCCESS {
return io_iterator_t{}, fmt.Errorf("IOServiceGetMatchingServices failed (code %d)", err) return 0, fmt.Errorf("IOServiceGetMatchingServices failed (code %d)", err)
} }
return io_iterator_t{i}, nil return io_iterator_t(i), nil
} }
// cfStringRef // CFStringRef
type cfStringRef struct { type cfStringRef C.CFStringRef
cfs C.CFStringRef
}
func CFStringCreateWithString(s string) cfStringRef { func cfStringCreateWithString(s string) cfStringRef {
c := C.CString(s) c := C.CString(s)
defer C.free(unsafe.Pointer(c)) defer C.free(unsafe.Pointer(c))
val := C.CFStringCreateWithCString( return cfStringRef(C.CFStringCreateWithCString(
C.kCFAllocatorDefault, c, C.kCFStringEncodingMacRoman) C.kCFAllocatorDefault, c, C.kCFStringEncodingMacRoman))
return cfStringRef{val}
} }
func (ref cfStringRef) Release() { func (ref cfStringRef) Release() {
C.CFRelease(C.CFTypeRef(ref.cfs)) C.CFRelease(C.CFTypeRef(ref))
} }
// CFTypeRef // CFTypeRef
type cfTypeRef struct { type cfTypeRef C.CFTypeRef
cft C.CFTypeRef
}
func (ref cfTypeRef) Release() { func (ref cfTypeRef) Release() {
C.CFRelease(C.CFTypeRef(ref.cft)) C.CFRelease(C.CFTypeRef(ref))
} }
// io_registry_entry_t // io_registry_entry_t
type io_registry_entry_t struct { type io_registry_entry_t C.io_registry_entry_t
ioregistryentry C.io_registry_entry_t
}
func (me *io_registry_entry_t) GetParent(plane string) (io_registry_entry_t, error) { func (me *io_registry_entry_t) GetParent(plane string) (io_registry_entry_t, error) {
cPlane := C.CString(plane) cPlane := C.CString(plane)
defer C.free(unsafe.Pointer(cPlane)) defer C.free(unsafe.Pointer(cPlane))
var parent C.io_registry_entry_t var parent C.io_registry_entry_t
err := C.IORegistryEntryGetParentEntry(me.ioregistryentry, cPlane, &parent) err := C.IORegistryEntryGetParentEntry(C.io_registry_entry_t(*me), cPlane, &parent)
if err != 0 { if err != 0 {
return io_registry_entry_t{}, errors.New("No parent device available") return 0, errors.New("No parent device available")
} }
return io_registry_entry_t{parent}, nil return io_registry_entry_t(parent), nil
} }
func (me *io_registry_entry_t) CreateCFProperty(key string) (cfTypeRef, error) { func (me *io_registry_entry_t) CreateCFProperty(key string) (cfTypeRef, error) {
k := CFStringCreateWithString(key) k := cfStringCreateWithString(key)
defer k.Release() defer k.Release()
property := C.IORegistryEntryCreateCFProperty(me.ioregistryentry, k.cfs, C.kCFAllocatorDefault, 0) property := C.IORegistryEntryCreateCFProperty(C.io_registry_entry_t(*me), C.CFStringRef(k), C.kCFAllocatorDefault, 0)
if property == 0 { if property == 0 {
return cfTypeRef{}, errors.New("Property not found: " + key) return 0, errors.New("Property not found: " + key)
} }
return cfTypeRef{property}, nil return cfTypeRef(property), nil
} }
func (me *io_registry_entry_t) GetStringProperty(key string) (string, error) { func (me *io_registry_entry_t) GetStringProperty(key string) (string, error) {
@@ -199,13 +186,13 @@ func (me *io_registry_entry_t) GetStringProperty(key string) (string, error) {
} }
defer property.Release() defer property.Release()
if ptr := C.CFStringGetCStringPtr(C.CFStringRef(property.cft), 0); ptr != nil { if ptr := C.CFStringGetCStringPtr(C.CFStringRef(property), 0); ptr != nil {
return C.GoString(ptr), nil return C.GoString(ptr), nil
} }
// in certain circumstances CFStringGetCStringPtr may return NULL // in certain circumstances CFStringGetCStringPtr may return NULL
// and we must retrieve the string by copy // and we must retrieve the string by copy
buff := make([]C.char, 1024) buff := make([]C.char, 1024)
if C.CFStringGetCString(C.CFStringRef(property.cft), &buff[0], 1024, 0) != C.true { if C.CFStringGetCString(C.CFStringRef(property), &buff[0], 1024, 0) != C.true {
return "", fmt.Errorf("Property '%s' can't be converted", key) return "", fmt.Errorf("Property '%s' can't be converted", key)
} }
return C.GoString(&buff[0]), nil return C.GoString(&buff[0]), nil
@@ -218,17 +205,25 @@ func (me *io_registry_entry_t) GetIntProperty(key string, intType C.CFNumberType
} }
defer property.Release() defer property.Release()
var res int var res int
if C.CFNumberGetValue((C.CFNumberRef)(property.cft), intType, unsafe.Pointer(&res)) != C.true { if C.CFNumberGetValue((C.CFNumberRef)(property), intType, unsafe.Pointer(&res)) != C.true {
return res, fmt.Errorf("Property '%s' can't be converted or has been truncated", key) return res, fmt.Errorf("Property '%s' can't be converted or has been truncated", key)
} }
return res, nil return res, nil
} }
func (me *io_registry_entry_t) Release() {
C.IOObjectRelease(C.io_object_t(*me))
}
func (me *io_registry_entry_t) GetClass() string {
class := make([]C.char, 1024)
C.IOObjectGetClass(C.io_object_t(*me), &class[0])
return C.GoString(&class[0])
}
// io_iterator_t // io_iterator_t
type io_iterator_t struct { type io_iterator_t C.io_iterator_t
ioiterator C.io_iterator_t
}
// IsValid checks if an iterator is still valid. // IsValid checks if an iterator is still valid.
// Some iterators will be made invalid if changes are made to the // Some iterators will be made invalid if changes are made to the
@@ -236,34 +231,32 @@ type io_iterator_t struct {
// is still valid and should be called when Next returns zero. // is still valid and should be called when Next returns zero.
// An invalid iterator can be Reset and the iteration restarted. // An invalid iterator can be Reset and the iteration restarted.
func (me *io_iterator_t) IsValid() bool { func (me *io_iterator_t) IsValid() bool {
return C.IOIteratorIsValid(me.ioiterator) == C.true return C.IOIteratorIsValid(C.io_iterator_t(*me)) == C.true
} }
func (me *io_iterator_t) Reset() { func (me *io_iterator_t) Reset() {
C.IOIteratorReset(me.ioiterator) C.IOIteratorReset(C.io_iterator_t(*me))
} }
func (me *io_iterator_t) Next() (*io_object_t, bool) { func (me *io_iterator_t) Next() (io_object_t, bool) {
res := C.IOIteratorNext(me.ioiterator) res := C.IOIteratorNext(C.io_iterator_t(*me))
return &io_object_t{res}, res != 0 return io_object_t(res), res != 0
} }
func (me *io_iterator_t) Release() { func (me *io_iterator_t) Release() {
C.IOObjectRelease(me.ioiterator) C.IOObjectRelease(C.io_object_t(*me))
} }
// io_object_t // io_object_t
type io_object_t struct { type io_object_t C.io_object_t
ioobject C.io_object_t
}
func (me *io_object_t) Release() { func (me *io_object_t) Release() {
C.IOObjectRelease(me.ioobject) C.IOObjectRelease(C.io_object_t(*me))
} }
func (me *io_object_t) GetClass() string { func (me *io_object_t) GetClass() string {
class := make([]C.char, 1024) class := make([]C.char, 1024)
C.IOObjectGetClass(me.ioobject, &class[0]) C.IOObjectGetClass(C.io_object_t(*me), &class[0])
return C.GoString(&class[0]) return C.GoString(&class[0])
} }