實時叠代所有連接的 USB 硬件設備
阿新 • • 發佈：2018-08-26
add 字典 實時 destroy code 子類 叠代 run mode
//
// main.c
// DriverIterator
//
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/IOKitLib.h>
void DeviceAdded (void* refCon, io_iterator_t iterator)
{
io_service_t service = 0;
//叠代所有的匹配對象
while ((service = IOIteratorNext(iterator)) != 0)
{
CFStringRef className;
io_name_t name;
//列出所有的 IOUSBDevice 忽略IOUSBDevice子類的對象
className = IOObjectCopyClass(service);
if (CFEqual(className, CFSTR("IOUSBDevice")) == true)
{
IORegistryEntryGetName(service, name);
printf("Found device with name: %s\n", name);
}
CFRelease(className);
IOObjectRelease(service);
}
}
int main (int argc, const char * argv[])
{
CFDictionaryRef matchingDict = NULL;
io_iterator_t iter = 0;
IONotificationPortRef notificationPort = NULL;
CFRunLoopSourceRef runLoopSource;
kern_return_t kr;
//創建一個匹配字典，用於查找任意的 USB 設備
matchingDict = IOServiceMatching("IOUSBDevice");
notificationPort = IONotificationPortCreate(kIOMasterPortDefault);
runLoopSource = IONotificationPortGetRunLoopSource(notificationPort);
//RunLoop機制
CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, kCFRunLoopDefaultMode);
//設置回調
kr = IOServiceAddMatchingNotification(notificationPort, kIOFirstMatchNotification, matchingDict, DeviceAdded, NULL, &iter);
DeviceAdded(NULL, iter);
CFRunLoopRun();
IONotificationPortDestroy(notificationPort);
//
IOObjectRelease(iter);
return 0;
}
Found device with name: Bluetooth USB Host Controller
Found device with name: BRCM20702 Hub
Found device with name: IOUSBHostDevice實時叠代所有連接的 USB 硬件設備