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IOHIDDevice.c
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IOHIDDevice.c
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/*
* Copyright (c) 1999-2008 Apple Computer, Inc. All Rights Reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#define DEBUG_ASSERT_COMPONENT_NAME_STRING IOHIDDevice
#if 0
#warning ### REMOVE THIS ###
#define DEBUG_ASSERT_PRODUCTION_CODE 0
#endif
#include <pthread.h>
#include <CoreFoundation/CFRuntime.h>
#include <CoreFoundation/CFBase.h>
#include <IOKit/IOCFPlugIn.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/IOMessage.h>
#include <IOKit/hid/IOHIDKeys.h>
#include <asl.h>
#include <AssertMacros.h>
#include "IOHIDDevicePlugIn.h"
#include "IOHIDDevicePrivate.h"
#include "IOHIDQueue.h"
#include "IOHIDElement.h"
#include "IOHIDTransaction.h"
#include "IOHIDLibPrivate.h"
#include "IOHIDManagerPersistentProperties.h"
#include <os/assumes.h>
#include <dispatch/private.h>
#include "HIDDeviceIvar.h"
#include <IOKit/hid/IOHIDPreferences.h>
typedef struct __IOHIDDevice {
struct objc_object base;
struct {
HIDDeviceIvar
};
} __IOHIDDevice;
//------------------------------------------------------------------------------
static CFArrayRef __IOHIDDeviceCopyMatchingInputElements(
IOHIDDeviceRef device,
CFArrayRef multiple);
static void __IOHIDDeviceRegisterMatchingInputElements(
IOHIDDeviceRef device,
IOHIDQueueRef queue,
CFArrayRef mutlipleMatch);
static void __IOHIDDeviceInputElementValueCallback(
void * context,
IOReturn result,
void * sender);
static void __IOHIDDeviceNotification(
IOHIDDeviceRef service,
io_service_t ioservice,
natural_t messageType,
void * messageArgument );
static void __IOHIDDeviceValueCallback(
void * context,
IOReturn result,
void * sender,
IOHIDValueRef value);
static void __IOHIDDeviceReportCallbackOnce(
void * context,
IOReturn result,
void * sender,
IOHIDReportType type,
uint32_t reportID,
uint8_t * report,
CFIndex reportLength);
static void __IOHIDDeviceInputReportCallback(
void * context,
IOReturn result,
void * sender,
IOHIDReportType type,
uint32_t reportID,
uint8_t * report,
CFIndex reportLength);
static void __IOHIDDeviceInputReportWithTimeStampCallback(
void * context,
IOReturn result,
void * sender,
IOHIDReportType type,
uint32_t reportID,
uint8_t * report,
CFIndex reportLength,
uint64_t timeStamp);
static void __IOHIDDeviceInputReportApplier(
CFDataRef value,
void *voidContext);
static void __IOHIDDeviceRegisterInputReportCallback(
IOHIDDeviceRef device,
uint8_t * report,
CFIndex reportLength,
IOHIDReportCallback callback,
IOHIDReportWithTimeStampCallback callbackWithTimeStamp,
void * context);
static void __IOHIDDeviceTransactionCallback(
void * context,
IOReturn result,
void * sender);
static Boolean __IOHIDDeviceCallbackBaseDataIsEqual(
const void * value1,
const void * value2);
static Boolean __IOHIDDeviceSetupAsyncSupport(IOHIDDeviceRef device);
//------------------------------------------------------------------------------
typedef struct {
void *context;
IOReturn result;
void *sender;
IOHIDReportType type;
uint32_t reportID;
uint8_t *report;
CFIndex reportLength;
uint64_t timeStamp;
} IOHIDDeviceInputReportApplierContext;
typedef struct {
void * context;
void * callback;
} IOHIDDeviceCallbackBaseInfo;
typedef struct {
void * context;
void * callback;
IOHIDDeviceRef device;
} IOHIDDeviceCallbackInfo;
typedef struct {
void * context;
void * callback;
IOHIDDeviceRef device;
CFArrayRef elements;
} IOHIDDeviceTransactionCallbackInfo;
typedef struct {
void * context;
IOHIDValueCallback callback;
} IOHIDDeviceInputElementValueCallbackInfo;
typedef struct {
void * context;
IOHIDCallback callback;
} IOHIDDeviceRemovalCallbackInfo;
typedef struct {
void * context;
IOHIDReportCallback callback;
IOHIDReportWithTimeStampCallback callbackWithTimeStamp;
IOHIDDeviceRef device;
} IOHIDDeviceReportCallbackInfo;
static dispatch_once_t __deviceInit = 0;
static CFSetCallBacks __callbackBaseSetCallbacks = {};
static CFStringRef __debugKeys[] = {CFSTR(kIOHIDTransportKey), CFSTR(kIOHIDVendorIDKey), CFSTR(kIOHIDVendorIDSourceKey), CFSTR(kIOHIDProductIDKey), CFSTR(kIOHIDManufacturerKey), CFSTR(kIOHIDProductKey), CFSTR(kIOHIDPrimaryUsagePageKey), CFSTR(kIOHIDPrimaryUsageKey), CFSTR(kIOHIDCategoryKey), CFSTR(kIOHIDReportIntervalKey), CFSTR(kIOHIDSampleIntervalKey), CFSTR(kIOHIDBatchIntervalKey)};
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// IOHIDDeviceCopyDescription
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
CFStringRef IOHIDDeviceCopyDescription(IOHIDDeviceRef device)
{
CFMutableStringRef description = NULL;
CFStringRef subDescription = NULL;
io_name_t name = "";
io_registry_entry_t regEntry = MACH_PORT_NULL;
regEntry = device->service;
if ( regEntry && (IOObjectRetain(regEntry) != KERN_SUCCESS)) {
regEntry = MACH_PORT_NULL;
}
description = CFStringCreateMutable(CFGetAllocator(device), 0);
require(description, exit);
IORegistryEntryGetName(regEntry, name);
if (strlen(name) == 0) {
IOObjectGetClass(regEntry, name);
}
subDescription = CFStringCreateWithFormat(CFGetAllocator(device), NULL, CFSTR("<IOHIDDevice %p [%p] 'ClassName=%s'"),
device,
CFGetAllocator(device),
name);
if ( subDescription ) {
CFStringAppend(description, subDescription);
CFRelease(subDescription);
}
for ( uint32_t index=0; index<(sizeof(__debugKeys)/sizeof(CFStringRef)); index++ ) {
CFTypeRef object;
object = IOHIDDeviceGetProperty(device, __debugKeys[index]);
if ( !object )
continue;
if ( CFGetTypeID(object) == CFNumberGetTypeID() ) {
CFNumberRef number = (CFNumberRef)object;
uint32_t value;
CFNumberGetValue(number, kCFNumberSInt32Type, &value);
subDescription = CFStringCreateWithFormat(CFGetAllocator(device), NULL, CFSTR(" %@=%d"), __debugKeys[index], value);
}
else if ( CFGetTypeID(object) == CFStringGetTypeID() ) {
subDescription = CFStringCreateWithFormat(CFGetAllocator(device), NULL, CFSTR(" %@=%@"), __debugKeys[index], object);
}
if ( !subDescription )
continue;
CFStringAppend(description, subDescription);
CFRelease(subDescription);
}
CFStringAppend(description, CFSTR(">"));
exit:
if ( regEntry )
IOObjectRelease(regEntry);
return description;
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// _IOHIDDeviceReleasePrivate
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void _IOHIDDeviceReleasePrivate(IOHIDDeviceRef device)
{
if (device->dispatchQueue) {
// enforce the call to activate/cancel
os_assert(device->dispatchStateMask == (kIOHIDDispatchStateActive | kIOHIDDispatchStateCancelled),
"Invalid dispatch state: 0x%x", device->dispatchStateMask);
}
if (device->queue) {
CFRelease(device->queue);
}
if ( device->inputMatchingMultiple ) {
CFRelease(device->inputMatchingMultiple);
device->inputMatchingMultiple = NULL;
}
CFRELEASE_IF_NOT_NULL(device->properties);
CFRELEASE_IF_NOT_NULL(device->elements);
CFRELEASE_IF_NOT_NULL(device->rootKey);
CFRELEASE_IF_NOT_NULL(device->removalCallbackSet);
CFRELEASE_IF_NOT_NULL(device->inputValueCallbackSet);
CFRELEASE_IF_NOT_NULL(device->inputReportCallbackSet);
if ( device->deviceInterface ) {
(*device->deviceInterface)->Release(device->deviceInterface);
device->deviceInterface = NULL;
}
if ( device->deviceTimeStampedInterface ) {
(*device->deviceTimeStampedInterface)->Release(device->deviceTimeStampedInterface);
device->deviceTimeStampedInterface = NULL;
}
if ( device->service ) {
IOObjectRelease(device->service);
device->service = 0;
}
if ( device->notification ) {
IOObjectRelease(device->notification);
device->notification = 0;
}
if (device->notificationPort) {
IONotificationPortDestroy(device->notificationPort);
device->notificationPort = NULL;
}
if (device->plugInInterface) {
IODestroyPlugInInterface(device->plugInInterface);
device->plugInInterface = NULL;
}
if (device->elementHandler) {
Block_release(device->elementHandler);
}
if (device->removalHandler) {
Block_release(device->removalHandler);
}
if (device->inputReportHandler) {
Block_release(device->inputReportHandler);
}
if (device->reportBuffer) {
CFRelease(device->reportBuffer);
}
if (device->transaction) {
CFRelease(device->transaction);
}
if (device->batchElements) {
CFRelease(device->batchElements);
}
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// __IOHIDDeviceNotification
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
void __IOHIDDeviceNotification(
IOHIDDeviceRef device,
io_service_t ioservice __unused,
natural_t messageType,
void * messageArgument __unused)
{
CFIndex index, count = 0;
if (!device || (messageType != kIOMessageServiceIsTerminated)) {
return;
}
os_unfair_recursive_lock_lock(&device->callbackLock);
if ( !device->removalCallbackSet || !(count=CFSetGetCount(device->removalCallbackSet))) {
os_unfair_recursive_lock_unlock(&device->callbackLock);
return;
}
CFRetain(device);
CFDataRef dataValues[count];
bzero(dataValues, sizeof(CFDataRef) * count);
CFSetGetValues(device->removalCallbackSet, (const void **)dataValues);
for ( index=0; index<count; index++ ) {
IOHIDDeviceRemovalCallbackInfo * info;
CFDataRef infoRef;
infoRef = (CFDataRef)dataValues[index];
if ( !infoRef )
continue;
info = (IOHIDDeviceRemovalCallbackInfo *)CFDataGetBytePtr(infoRef);
if ( !info )
continue;
if (!info->callback)
continue;
info->callback(info->context, kIOReturnSuccess, device);
}
os_unfair_recursive_lock_unlock(&device->callbackLock);
CFRelease(device);
}
//------------------------------------------------------------------------------
// _IOHIDDeviceGetIOCFPlugInInterface
//------------------------------------------------------------------------------
IOCFPlugInInterface ** _IOHIDDeviceGetIOCFPlugInInterface(
IOHIDDeviceRef device)
{
return device->plugInInterface;
}
//------------------------------------------------------------------------------
// IOHIDDeviceCreate
//------------------------------------------------------------------------------
IOHIDDeviceRef IOHIDDeviceCreate(
CFAllocatorRef allocator,
io_service_t service)
{
IOCFPlugInInterface ** plugInInterface = NULL;
IOHIDDeviceDeviceInterface ** deviceInterface = NULL;
IOHIDDeviceTimeStampedDeviceInterface ** deviceTimeStampedInterface = NULL;
IOHIDDeviceRef device = NULL;
SInt32 score = 0;
uint64_t serviceID = 0;
HRESULT result;
kern_return_t kr;
dispatch_once(&__deviceInit, ^{
__callbackBaseSetCallbacks = kCFTypeSetCallBacks;
__callbackBaseSetCallbacks.equal = __IOHIDDeviceCallbackBaseDataIsEqual;
});
kr = IOObjectRetain(service);
require_noerr_action(kr, retain_fail, os_log_error(_IOHIDLog(), "IOObjectRetain:0x%x", kr));
kr = IORegistryEntryGetRegistryEntryID(service, &serviceID);
kr = IOCreatePlugInInterfaceForService(service, kIOHIDDeviceTypeID, kIOCFPlugInInterfaceID, &plugInInterface, &score);
require_noerr_action(kr, plugin_fail, os_log_error(_IOHIDLog(), "IOCreatePlugInInterfaceForService:0x%x for serviceID:%#llx", kr, serviceID));
result = (*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(kIOHIDDeviceDeviceInterfaceID), (LPVOID)&deviceInterface);
require_noerr_action(result, query_fail, os_log_error(_IOHIDLog(),"QueryInterface(kIOHIDDeviceDeviceInterfaceID):0x%x", (int)result));
result = (*plugInInterface)->QueryInterface(plugInInterface, CFUUIDGetUUIDBytes(kIOHIDDeviceDeviceInterfaceID2), (LPVOID)&deviceTimeStampedInterface);
if (result != S_OK) {
deviceTimeStampedInterface = NULL;
}
device = _IOHIDDeviceCreatePrivate(allocator);
require(device, create_fail);
device->plugInInterface = plugInInterface;
device->deviceInterface = deviceInterface;
device->deviceTimeStampedInterface = deviceTimeStampedInterface;
device->service = service;
device->deviceLock = OS_UNFAIR_RECURSIVE_LOCK_INIT;
device->callbackLock = OS_UNFAIR_RECURSIVE_LOCK_INIT;
IORegistryEntryGetRegistryEntryID(service, &device->regID);
return device;
create_fail:
if (deviceInterface)
(*deviceInterface)->Release(deviceInterface);
if (deviceTimeStampedInterface)
(*deviceTimeStampedInterface)->Release(deviceInterface);
query_fail:
IODestroyPlugInInterface(plugInInterface);
plugin_fail:
IOObjectRelease(service);
retain_fail:
return NULL;
}
//------------------------------------------------------------------------------
// IOHIDDeviceGetService
//------------------------------------------------------------------------------
io_service_t IOHIDDeviceGetService(
IOHIDDeviceRef device)
{
return device->service;
}
//------------------------------------------------------------------------------
// IOHIDDeviceOpen
//------------------------------------------------------------------------------
IOReturn IOHIDDeviceOpen(
IOHIDDeviceRef device,
IOOptionBits options)
{
IOReturn result;
result = (*device->deviceInterface)->open(device->deviceInterface, options);
return result;
}
//------------------------------------------------------------------------------
// IOHIDDeviceClose
//------------------------------------------------------------------------------
IOReturn IOHIDDeviceClose(
IOHIDDeviceRef device,
IOOptionBits options)
{
IOReturn result;
os_unfair_recursive_lock_lock(&device->callbackLock);
if ( device->inputValueCallbackSet )
CFSetRemoveAllValues(device->inputValueCallbackSet);
if ( device->inputReportCallbackSet )
CFSetRemoveAllValues(device->inputReportCallbackSet);
os_unfair_recursive_lock_unlock(&device->callbackLock);
result = (*device->deviceInterface)->close(device->deviceInterface, options);
return result;
}
//------------------------------------------------------------------------------
// IOHIDDeviceConformsTo
//------------------------------------------------------------------------------
Boolean IOHIDDeviceConformsTo(
IOHIDDeviceRef device,
uint32_t usagePage,
uint32_t usage)
{
Boolean doesConform = FALSE;
CFMutableDictionaryRef matching = NULL;
matching = CFDictionaryCreateMutable(CFGetAllocator(device), 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
if (matching) {
CFArrayRef elements = NULL;
CFNumberRef number = NULL;
uint32_t value;
value = kIOHIDElementTypeCollection;
number = CFNumberCreate(CFGetAllocator(device), kCFNumberIntType, &value);
CFDictionarySetValue(matching, CFSTR(kIOHIDElementTypeKey), number);
CFRelease(number);
value = usagePage;
number = CFNumberCreate(CFGetAllocator(device), kCFNumberIntType, &value);
CFDictionarySetValue(matching, CFSTR(kIOHIDElementUsagePageKey), number);
CFRelease(number);
value = usage;
number = CFNumberCreate(CFGetAllocator(device), kCFNumberIntType, &value);
CFDictionarySetValue(matching, CFSTR(kIOHIDElementUsageKey), number);
CFRelease(number);
elements = IOHIDDeviceCopyMatchingElements(device, matching, 0);
if ( elements ) {
CFIndex count, index;
IOHIDElementRef element;
count = CFArrayGetCount(elements);
for (index=0; index<count; index++) {
element = (IOHIDElementRef)CFArrayGetValueAtIndex(elements, index);
if ( IOHIDElementGetCollectionType(element) == kIOHIDElementCollectionTypePhysical ||
IOHIDElementGetCollectionType(element) == kIOHIDElementCollectionTypeApplication ) {
doesConform = TRUE;
break;
}
}
CFRelease(elements);
}
CFRelease(matching);
}
return doesConform;
}
//------------------------------------------------------------------------------
// IOHIDDeviceGetProperty
//------------------------------------------------------------------------------
CFTypeRef IOHIDDeviceGetProperty(
IOHIDDeviceRef device,
CFStringRef key)
{
CFTypeRef property = NULL;
IOReturn ret;
os_unfair_recursive_lock_lock(&device->deviceLock);
ret = (*device->deviceInterface)->getProperty(
device->deviceInterface,
key,
&property);
if ((ret != kIOReturnSuccess) || !property) {
if (device->properties) {
property = CFDictionaryGetValue(device->properties, key);
}
else {
property = NULL;
}
}
os_unfair_recursive_lock_unlock(&device->deviceLock);
return property;
}
//------------------------------------------------------------------------------
// IOHIDDeviceSetProperty
//------------------------------------------------------------------------------
Boolean IOHIDDeviceSetProperty(
IOHIDDeviceRef device,
CFStringRef key,
CFTypeRef property)
{
Boolean result = FALSE;
os_unfair_recursive_lock_lock(&device->deviceLock);
if (!device->properties) {
device->properties = CFDictionaryCreateMutable(CFGetAllocator(device),
0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (!device->properties) {
os_unfair_recursive_lock_unlock(&device->deviceLock);
return result;
}
}
device->isDirty = TRUE;
CFDictionarySetValue(device->properties, key, property);
if (CFEqual(key, CFSTR(kIOHIDDeviceSuspendKey)) && CFGetTypeID(property) == CFBooleanGetTypeID()) {
require(device->queue, exit);
if (property == kCFBooleanTrue) {
IOHIDQueueStop(device->queue);
} else {
IOHIDQueueStart(device->queue);
}
}
exit:
os_unfair_recursive_lock_unlock(&device->deviceLock);
result = (*device->deviceInterface)->setProperty(device->deviceInterface,
key,
property) == kIOReturnSuccess;
return result;
}
//------------------------------------------------------------------------------
// IOHIDDeviceCopyMatchingElements
//------------------------------------------------------------------------------
CFArrayRef IOHIDDeviceCopyMatchingElements(
IOHIDDeviceRef device,
CFDictionaryRef matching,
IOOptionBits options)
{
CFArrayRef elements = NULL;
IOReturn ret;
ret = (*device->deviceInterface)->copyMatchingElements(
device->deviceInterface,
matching,
&elements,
options);
if ( ret != kIOReturnSuccess && elements ) {
CFRelease(elements);
elements = NULL;
}
if ( elements ) {
CFIndex count, index;
IOHIDElementRef element;
count = CFArrayGetCount(elements);
for (index=0; index<count; index++) {
element = (IOHIDElementRef)CFArrayGetValueAtIndex(elements, index);
_IOHIDElementSetDevice(element, device);
os_unfair_recursive_lock_lock(&device->deviceLock);
if (device->elements ||
(device->elements = CFSetCreateMutable(CFGetAllocator(device),
0,
&kCFTypeSetCallBacks))) {
if (!CFSetContainsValue(device->elements, element)) {
CFSetSetValue(device->elements, element);
if (device->loadProperties) {
__IOHIDElementLoadProperties(element);
}
}
}
os_unfair_recursive_lock_unlock(&device->deviceLock);
}
}
return elements;
}
//------------------------------------------------------------------------------
// __IOHIDDeviceSetupAsyncSupport
//------------------------------------------------------------------------------
// This function should only be called under the deviceLock lock.
Boolean __IOHIDDeviceSetupAsyncSupport(IOHIDDeviceRef device)
{
IOReturn ret = kIOReturnError;
CFTypeRef asyncSource = NULL;
Boolean result = false;
CFRunLoopSourceContext1 sourceContext = { 1, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
// we've already been scheduled
os_assert(!device->runLoop && !device->dispatchQueue, "Device already scheduled");
require_action(!device->asyncEventSource, exit, result = true);
ret = (*device->deviceInterface)->getAsyncEventSource(device->deviceInterface, &asyncSource);
os_assert(ret == kIOReturnSuccess && asyncSource, "Failed to get async event source: 0x%x %p", ret, asyncSource);
device->asyncEventSource = (CFRunLoopSourceRef)asyncSource;
CFRunLoopSourceGetContext(device->asyncEventSource, (CFRunLoopSourceContext *)&sourceContext);
device->sourceContext = sourceContext;
device->queuePort = (CFMachPortRef)device->sourceContext.info;
os_assert(device->queuePort, "Failed to get queue port %p %p", device->queuePort, &device->sourceContext);
if (!device->notificationPort) {
device->notificationPort = IONotificationPortCreate(kIOMainPortDefault);
}
os_assert(device->notificationPort, "Failed to create notification port %p", device->notificationPort);
result = true;
exit:
return result;
}
//------------------------------------------------------------------------------
// IOHIDDeviceScheduleWithRunLoop
//------------------------------------------------------------------------------
void IOHIDDeviceScheduleWithRunLoop(
IOHIDDeviceRef device,
CFRunLoopRef runLoop,
CFStringRef runLoopMode)
{
os_unfair_recursive_lock_lock(&device->deviceLock);
if (device->runLoop) {
IOHIDDeviceUnscheduleFromRunLoop(device, device->runLoop, device->runLoopMode);
}
os_assert(__IOHIDDeviceSetupAsyncSupport(device));
device->runLoop = runLoop;
device->runLoopMode = runLoopMode;
CFRunLoopAddSource(device->runLoop, device->asyncEventSource, device->runLoopMode);
CFRunLoopSourceRef source = IONotificationPortGetRunLoopSource(device->notificationPort);
if (source) {
CFRunLoopAddSource(device->runLoop, source, device->runLoopMode);
}
IOHIDQueueRef queue = device->queue;
os_unfair_recursive_lock_unlock(&device->deviceLock);
// Default queue has already been created, so go ahead and schedule it
if (queue) {
IOHIDQueueScheduleWithRunLoop(queue, runLoop, runLoopMode);
IOHIDQueueStart(queue);
}
}
//------------------------------------------------------------------------------
// IOHIDDeviceUnscheduleFromRunLoop
//------------------------------------------------------------------------------
void IOHIDDeviceUnscheduleFromRunLoop(
IOHIDDeviceRef device,
CFRunLoopRef runLoop __unused,
CFStringRef runLoopMode __unused)
{
os_unfair_recursive_lock_lock(&device->deviceLock);
if (!device->runLoop) {
os_unfair_recursive_lock_unlock(&device->deviceLock);
return;
}
IOHIDQueueRef queue = device->queue;
CFRunLoopRef prevRunLoop = device->runLoop;
CFStringRef prevRunLoopMode = device->runLoopMode;
os_unfair_recursive_lock_unlock(&device->deviceLock);
if (queue) {
IOHIDQueueStop(queue);
IOHIDQueueUnscheduleFromRunLoop(queue, prevRunLoop, prevRunLoopMode);
}
os_unfair_recursive_lock_lock(&device->deviceLock);
if (device->notificationPort) {
CFRunLoopSourceRef source = IONotificationPortGetRunLoopSource(device->notificationPort);
if (source) {
CFRunLoopRemoveSource(device->runLoop, source, device->runLoopMode);
}
}
if (device->asyncEventSource) {
CFRunLoopRemoveSource(device->runLoop, device->asyncEventSource, device->runLoopMode);
}
device->runLoop = NULL;
device->runLoopMode = NULL;
os_unfair_recursive_lock_unlock(&device->deviceLock);
}
//------------------------------------------------------------------------------
// IOHIDDeviceSetDispatchQueue
//------------------------------------------------------------------------------
void IOHIDDeviceSetDispatchQueue(IOHIDDeviceRef device, dispatch_queue_t queue)
{
os_unfair_recursive_lock_lock(&device->deviceLock);
os_assert(__IOHIDDeviceSetupAsyncSupport(device));
char label[256] = {0};
snprintf(label, sizeof(label), "%s.IOHIDDeviceRef:0x%llx", dispatch_queue_get_label (queue) ? dispatch_queue_get_label (queue) : "", device->regID);
device->dispatchQueue = dispatch_queue_create_with_target(label, DISPATCH_QUEUE_SERIAL, queue);
require(device->dispatchQueue, exit);
CFRetain(device);
device->dispatchMach = dispatch_mach_create(label, device->dispatchQueue,
^(dispatch_mach_reason_t reason,
dispatch_mach_msg_t message,
mach_error_t error __unused) {
switch (reason) {
case DISPATCH_MACH_MESSAGE_RECEIVED: {
size_t size = 0;
mach_msg_header_t *header = dispatch_mach_msg_get_msg(message, &size);
// this will call into _portCallback in IOHIDDeviceClass
((CFRunLoopSourceContext1*)&device->sourceContext)->perform(header, size, NULL, device->queuePort);
break;
}
case DISPATCH_MACH_CANCELED: {
os_unfair_recursive_lock_lock(&device->deviceLock);
dispatch_release(device->dispatchMach);
device->dispatchMach = NULL;
IOHIDQueueRef queue = device->queue;
os_unfair_recursive_lock_unlock(&device->deviceLock);
os_unfair_recursive_lock_lock(&device->callbackLock);
if (device->cancelHandler && !queue) {
(device->cancelHandler)();
Block_release(device->cancelHandler);
device->cancelHandler = NULL;
}
os_unfair_recursive_lock_unlock(&device->callbackLock);
dispatch_release(device->dispatchQueue);
CFRelease(device);
break;
}
default:
break;
}
});
require_action(device->dispatchMach, exit, CFRelease(device));
if (device->queue) {
IOHIDQueueSetDispatchQueue(device->queue, device->dispatchQueue);
CFRetain(device);
IOHIDQueueSetCancelHandler(device->queue, ^{
os_unfair_recursive_lock_lock(&device->deviceLock);
CFRelease(device->queue);
device->queue = NULL;
dispatch_mach_t dispatchMach = device->dispatchMach;
os_unfair_recursive_lock_unlock(&device->deviceLock);
os_unfair_recursive_lock_lock(&device->callbackLock);
if (device->cancelHandler && !dispatchMach) {
(device->cancelHandler)();
Block_release(device->cancelHandler);
device->cancelHandler = NULL;
}
os_unfair_recursive_lock_unlock(&device->callbackLock);
CFRelease(device);
});
}
exit:
os_unfair_recursive_lock_unlock(&device->deviceLock);
return;
}
//------------------------------------------------------------------------------
// IOHIDDeviceSetCancelHandler
//------------------------------------------------------------------------------
void IOHIDDeviceSetCancelHandler(IOHIDDeviceRef device, dispatch_block_t handler)
{
os_unfair_recursive_lock_lock(&device->callbackLock);
os_assert(!device->cancelHandler && handler);
device->cancelHandler = Block_copy(handler);
os_unfair_recursive_lock_unlock(&device->callbackLock);
}
//------------------------------------------------------------------------------
// IOHIDDeviceActivate
//------------------------------------------------------------------------------
void IOHIDDeviceActivate(IOHIDDeviceRef device)
{
os_assert(device->dispatchQueue && !device->runLoop,
"Activate failed queue: %p runLoop: %p", device->dispatchQueue, device->runLoop);
if (atomic_fetch_or(&device->dispatchStateMask, kIOHIDDispatchStateActive) & kIOHIDDispatchStateActive) {
return;
}
dispatch_mach_connect(device->dispatchMach, CFMachPortGetPort(device->queuePort), MACH_PORT_NULL, 0);
IONotificationPortSetDispatchQueue(device->notificationPort, device->dispatchQueue);
if (device->queue) {
IOHIDQueueActivate(device->queue);
}
}
//------------------------------------------------------------------------------
// IOHIDDeviceCancel
//------------------------------------------------------------------------------
void IOHIDDeviceCancel(IOHIDDeviceRef device)
{
os_assert(device->dispatchQueue && !device->runLoop,
"Cancel failed queue: %p runLoop: %p", device->dispatchQueue, device->runLoop);
if (atomic_fetch_or(&device->dispatchStateMask, kIOHIDDispatchStateCancelled) & kIOHIDDispatchStateCancelled) {
return;
}
dispatch_mach_cancel(device->dispatchMach);
if (device->notificationPort) {
IONotificationPortDestroy(device->notificationPort);
device->notificationPort = NULL;
}
if (device->queue) {
IOHIDQueueCancel(device->queue);
}
}
//------------------------------------------------------------------------------
// IOHIDDeviceRegisterRemovalCallback
//------------------------------------------------------------------------------
void IOHIDDeviceRegisterRemovalCallback(
IOHIDDeviceRef device,
IOHIDCallback callback,
void * context)
{
IOHIDDeviceRemovalCallbackInfo info = { context, callback };
CFDataRef infoRef = NULL;
os_assert(device->dispatchStateMask == kIOHIDDispatchStateInactive, "Device has already been activated/cancelled.");
os_unfair_recursive_lock_lock(&device->callbackLock);
if (!device->removalCallbackSet) {
device->removalCallbackSet = CFSetCreateMutable(NULL, 0, &__callbackBaseSetCallbacks);
}
require(device->removalCallbackSet, cleanup);
// adding a callback
infoRef = CFDataCreate(CFGetAllocator(device), (const UInt8 *) &info, sizeof(info));
require(infoRef, cleanup);
if (callback) {
CFSetAddValue(device->removalCallbackSet, infoRef);
if (!device->notificationPort) {
device->notificationPort = IONotificationPortCreate(kIOMainPortDefault);
require(device->notificationPort, cleanup);
require(device->service, cleanup);
}
if (device->runLoop) {
CFRunLoopSourceRef source = IONotificationPortGetRunLoopSource(device->notificationPort);
if (source) {
CFRunLoopAddSource(device->runLoop, source, device->runLoopMode);
}
}
if (!device->notification) {
kern_return_t kret = 0;
kret = IOServiceAddInterestNotification(device->notificationPort, // notifyPort
device->service, // service
kIOGeneralInterest, // interestType
(IOServiceInterestCallback)__IOHIDDeviceNotification, // callback
device, // refCon
&(device->notification) // notification
);
require_noerr(kret, cleanup);
}
} else {
CFSetRemoveValue(device->removalCallbackSet, infoRef);
}
cleanup:
os_unfair_recursive_lock_unlock(&device->callbackLock);
CFRELEASE_IF_NOT_NULL(infoRef);
}
//******************************************************************************
// HID ELEMENT SUPPORT
//******************************************************************************
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// __IOHIDDeviceCopyMatchingInputElements
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
CFArrayRef __IOHIDDeviceCopyMatchingInputElements(IOHIDDeviceRef device, CFArrayRef multiple)
{
CFMutableArrayRef inputElements = NULL;
CFArrayRef elements = NULL;
CFIndex index, count;
// Grab the matching multiple. If one has not already been specified,
// fallback to the default
if ( multiple ) {
CFRetain(multiple);