--- /dev/null
+/*******************************************************
+ HIDAPI - Multi-Platform library for
+ communication with HID devices.
+
+ Alan Ott
+ Signal 11 Software
+
+ 2010-07-03
+
+ Copyright 2010, All Rights Reserved.
+
+ At the discretion of the user of this library,
+ this software may be licensed under the terms of the
+ GNU General Public License v3, a BSD-Style license, or the
+ original HIDAPI license as outlined in the LICENSE.txt,
+ LICENSE-gpl3.txt, LICENSE-bsd.txt, and LICENSE-orig.txt
+ files located at the root of the source distribution.
+ These files may also be found in the public source
+ code repository located at:
+ http://github.com/signal11/hidapi .
+********************************************************/
+
+/* See Apple Technical Note TN2187 for details on IOHidManager. */
+
+#include <IOKit/hid/IOHIDManager.h>
+#include <IOKit/hid/IOHIDKeys.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <wchar.h>
+#include <locale.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "hidapi.h"
+
+/* Barrier implementation because Mac OSX doesn't have pthread_barrier.
+ It also doesn't have clock_gettime(). So much for POSIX and SUSv2.
+ This implementation came from Brent Priddy and was posted on
+ StackOverflow. It is used with his permission. */
+typedef int pthread_barrierattr_t;
+typedef struct pthread_barrier {
+ pthread_mutex_t mutex;
+ pthread_cond_t cond;
+ int count;
+ int trip_count;
+} pthread_barrier_t;
+
+static int pthread_barrier_init(pthread_barrier_t *barrier, const pthread_barrierattr_t *attr, unsigned int count)
+{
+ if(count == 0) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if(pthread_mutex_init(&barrier->mutex, 0) < 0) {
+ return -1;
+ }
+ if(pthread_cond_init(&barrier->cond, 0) < 0) {
+ pthread_mutex_destroy(&barrier->mutex);
+ return -1;
+ }
+ barrier->trip_count = count;
+ barrier->count = 0;
+
+ return 0;
+}
+
+static int pthread_barrier_destroy(pthread_barrier_t *barrier)
+{
+ pthread_cond_destroy(&barrier->cond);
+ pthread_mutex_destroy(&barrier->mutex);
+ return 0;
+}
+
+static int pthread_barrier_wait(pthread_barrier_t *barrier)
+{
+ pthread_mutex_lock(&barrier->mutex);
+ ++(barrier->count);
+ if(barrier->count >= barrier->trip_count)
+ {
+ barrier->count = 0;
+ pthread_cond_broadcast(&barrier->cond);
+ pthread_mutex_unlock(&barrier->mutex);
+ return 1;
+ }
+ else
+ {
+ pthread_cond_wait(&barrier->cond, &(barrier->mutex));
+ pthread_mutex_unlock(&barrier->mutex);
+ return 0;
+ }
+}
+
+static int return_data(hid_device *dev, unsigned char *data, size_t length);
+
+/* Linked List of input reports received from the device. */
+struct input_report {
+ uint8_t *data;
+ size_t len;
+ struct input_report *next;
+};
+
+struct hid_device_ {
+ IOHIDDeviceRef device_handle;
+ int blocking;
+ int uses_numbered_reports;
+ int disconnected;
+ CFStringRef run_loop_mode;
+ CFRunLoopRef run_loop;
+ CFRunLoopSourceRef source;
+ uint8_t *input_report_buf;
+ CFIndex max_input_report_len;
+ struct input_report *input_reports;
+
+ pthread_t thread;
+ pthread_mutex_t mutex; /* Protects input_reports */
+ pthread_cond_t condition;
+ pthread_barrier_t barrier; /* Ensures correct startup sequence */
+ pthread_barrier_t shutdown_barrier; /* Ensures correct shutdown sequence */
+ int shutdown_thread;
+};
+
+static hid_device *new_hid_device(void)
+{
+ hid_device *dev = calloc(1, sizeof(hid_device));
+ dev->device_handle = NULL;
+ dev->blocking = 1;
+ dev->uses_numbered_reports = 0;
+ dev->disconnected = 0;
+ dev->run_loop_mode = NULL;
+ dev->run_loop = NULL;
+ dev->source = NULL;
+ dev->input_report_buf = NULL;
+ dev->input_reports = NULL;
+ dev->shutdown_thread = 0;
+
+ /* Thread objects */
+ pthread_mutex_init(&dev->mutex, NULL);
+ pthread_cond_init(&dev->condition, NULL);
+ pthread_barrier_init(&dev->barrier, NULL, 2);
+ pthread_barrier_init(&dev->shutdown_barrier, NULL, 2);
+
+ return dev;
+}
+
+static void free_hid_device(hid_device *dev)
+{
+ if (!dev)
+ return;
+
+ /* Delete any input reports still left over. */
+ struct input_report *rpt = dev->input_reports;
+ while (rpt) {
+ struct input_report *next = rpt->next;
+ free(rpt->data);
+ free(rpt);
+ rpt = next;
+ }
+
+ /* Free the string and the report buffer. The check for NULL
+ is necessary here as CFRelease() doesn't handle NULL like
+ free() and others do. */
+ if (dev->run_loop_mode)
+ CFRelease(dev->run_loop_mode);
+ if (dev->source)
+ CFRelease(dev->source);
+ free(dev->input_report_buf);
+
+ /* Clean up the thread objects */
+ pthread_barrier_destroy(&dev->shutdown_barrier);
+ pthread_barrier_destroy(&dev->barrier);
+ pthread_cond_destroy(&dev->condition);
+ pthread_mutex_destroy(&dev->mutex);
+
+ /* Free the structure itself. */
+ free(dev);
+}
+
+static IOHIDManagerRef hid_mgr = 0x0;
+
+
+#if 0
+static void register_error(hid_device *device, const char *op)
+{
+
+}
+#endif
+
+
+static int32_t get_int_property(IOHIDDeviceRef device, CFStringRef key)
+{
+ CFTypeRef ref;
+ int32_t value;
+
+ ref = IOHIDDeviceGetProperty(device, key);
+ if (ref) {
+ if (CFGetTypeID(ref) == CFNumberGetTypeID()) {
+ CFNumberGetValue((CFNumberRef) ref, kCFNumberSInt32Type, &value);
+ return value;
+ }
+ }
+ return 0;
+}
+
+static unsigned short get_vendor_id(IOHIDDeviceRef device)
+{
+ return get_int_property(device, CFSTR(kIOHIDVendorIDKey));
+}
+
+static unsigned short get_product_id(IOHIDDeviceRef device)
+{
+ return get_int_property(device, CFSTR(kIOHIDProductIDKey));
+}
+
+static int32_t get_location_id(IOHIDDeviceRef device)
+{
+ return get_int_property(device, CFSTR(kIOHIDLocationIDKey));
+}
+
+static int32_t get_max_report_length(IOHIDDeviceRef device)
+{
+ return get_int_property(device, CFSTR(kIOHIDMaxInputReportSizeKey));
+}
+
+static int get_string_property(IOHIDDeviceRef device, CFStringRef prop, wchar_t *buf, size_t len)
+{
+ CFStringRef str;
+
+ if (!len)
+ return 0;
+
+ str = IOHIDDeviceGetProperty(device, prop);
+
+ buf[0] = 0;
+
+ if (str) {
+ CFIndex str_len = CFStringGetLength(str);
+ CFRange range;
+ CFIndex used_buf_len;
+ CFIndex chars_copied;
+
+ len --;
+
+ range.location = 0;
+ range.length = ((size_t)str_len > len)? len: (size_t)str_len;
+ chars_copied = CFStringGetBytes(str,
+ range,
+ kCFStringEncodingUTF32LE,
+ (char)'?',
+ FALSE,
+ (UInt8*)buf,
+ len * sizeof(wchar_t),
+ &used_buf_len);
+
+ if (chars_copied == len)
+ buf[len] = 0; /* len is decremented above */
+ else
+ buf[chars_copied] = 0;
+
+ return 0;
+ }
+ else
+ return -1;
+
+}
+
+static int get_string_property_utf8(IOHIDDeviceRef device, CFStringRef prop, char *buf, size_t len)
+{
+ CFStringRef str;
+ if (!len)
+ return 0;
+
+ str = IOHIDDeviceGetProperty(device, prop);
+
+ buf[0] = 0;
+
+ if (str) {
+ len--;
+
+ CFIndex str_len = CFStringGetLength(str);
+ CFRange range;
+ range.location = 0;
+ range.length = str_len;
+ CFIndex used_buf_len;
+ CFIndex chars_copied;
+ chars_copied = CFStringGetBytes(str,
+ range,
+ kCFStringEncodingUTF8,
+ (char)'?',
+ FALSE,
+ (UInt8*)buf,
+ len,
+ &used_buf_len);
+
+ if (used_buf_len == len)
+ buf[len] = 0; /* len is decremented above */
+ else
+ buf[used_buf_len] = 0;
+
+ return used_buf_len;
+ }
+ else
+ return 0;
+}
+
+
+static int get_serial_number(IOHIDDeviceRef device, wchar_t *buf, size_t len)
+{
+ return get_string_property(device, CFSTR(kIOHIDSerialNumberKey), buf, len);
+}
+
+static int get_manufacturer_string(IOHIDDeviceRef device, wchar_t *buf, size_t len)
+{
+ return get_string_property(device, CFSTR(kIOHIDManufacturerKey), buf, len);
+}
+
+static int get_product_string(IOHIDDeviceRef device, wchar_t *buf, size_t len)
+{
+ return get_string_property(device, CFSTR(kIOHIDProductKey), buf, len);
+}
+
+
+/* Implementation of wcsdup() for Mac. */
+static wchar_t *dup_wcs(const wchar_t *s)
+{
+ size_t len = wcslen(s);
+ wchar_t *ret = malloc((len+1)*sizeof(wchar_t));
+ wcscpy(ret, s);
+
+ return ret;
+}
+
+
+static int make_path(IOHIDDeviceRef device, char *buf, size_t len)
+{
+ int res;
+ unsigned short vid, pid;
+ char transport[32];
+ int32_t location;
+
+ buf[0] = '\0';
+
+ res = get_string_property_utf8(
+ device, CFSTR(kIOHIDTransportKey),
+ transport, sizeof(transport));
+
+ if (!res)
+ return -1;
+
+ location = get_location_id(device);
+ vid = get_vendor_id(device);
+ pid = get_product_id(device);
+
+ int interval = get_int_property(device, CFSTR(kIOHIDReportIntervalKey));
+
+ res = snprintf(buf, len, "%s_%04hx_%04hx_%x_%d",
+ transport, vid, pid, location, interval);
+
+
+ buf[len-1] = '\0';
+ return res+1;
+}
+
+/* Initialize the IOHIDManager. Return 0 for success and -1 for failure. */
+static int init_hid_manager(void)
+{
+ /* Initialize all the HID Manager Objects */
+ hid_mgr = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
+ if (hid_mgr) {
+ IOHIDManagerSetDeviceMatching(hid_mgr, NULL);
+ IOHIDManagerScheduleWithRunLoop(hid_mgr, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
+ return 0;
+ }
+
+ return -1;
+}
+
+/* Initialize the IOHIDManager if necessary. This is the public function, and
+ it is safe to call this function repeatedly. Return 0 for success and -1
+ for failure. */
+int HID_API_EXPORT hid_init(void)
+{
+ if (!hid_mgr) {
+ return init_hid_manager();
+ }
+
+ /* Already initialized. */
+ return 0;
+}
+
+int HID_API_EXPORT hid_exit(void)
+{
+ if (hid_mgr) {
+ /* Close the HID manager. */
+ IOHIDManagerClose(hid_mgr, kIOHIDOptionsTypeNone);
+ CFRelease(hid_mgr);
+ hid_mgr = NULL;
+ }
+
+ return 0;
+}
+
+static void process_pending_events(void) {
+ SInt32 res;
+ do {
+ res = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.001, FALSE);
+ } while(res != kCFRunLoopRunFinished && res != kCFRunLoopRunTimedOut);
+}
+
+struct hid_device_info HID_API_EXPORT *hid_enumerate(unsigned short vendor_id, unsigned short product_id)
+{
+ struct hid_device_info *root = NULL; /* return object */
+ struct hid_device_info *cur_dev = NULL;
+ CFIndex num_devices;
+ int i;
+
+ /* Set up the HID Manager if it hasn't been done */
+ if (hid_init() < 0)
+ return NULL;
+
+ /* give the IOHIDManager a chance to update itself */
+ process_pending_events();
+
+ /* Get a list of the Devices */
+ IOHIDManagerSetDeviceMatching(hid_mgr, NULL);
+ CFSetRef device_set = IOHIDManagerCopyDevices(hid_mgr);
+
+ /* Convert the list into a C array so we can iterate easily. */
+ num_devices = CFSetGetCount(device_set);
+ IOHIDDeviceRef *device_array = calloc(num_devices, sizeof(IOHIDDeviceRef));
+ CFSetGetValues(device_set, (const void **) device_array);
+
+ /* Iterate over each device, making an entry for it. */
+ for (i = 0; i < num_devices; i++) {
+ unsigned short dev_vid;
+ unsigned short dev_pid;
+ #define BUF_LEN 256
+ wchar_t buf[BUF_LEN];
+ char cbuf[BUF_LEN];
+
+ IOHIDDeviceRef dev = device_array[i];
+
+ if (!dev) {
+ continue;
+ }
+ dev_vid = get_vendor_id(dev);
+ dev_pid = get_product_id(dev);
+
+ /* Check the VID/PID against the arguments */
+ if ((vendor_id == 0x0 || vendor_id == dev_vid) &&
+ (product_id == 0x0 || product_id == dev_pid)) {
+ struct hid_device_info *tmp;
+ size_t len;
+
+ /* VID/PID match. Create the record. */
+ tmp = malloc(sizeof(struct hid_device_info));
+ if (cur_dev) {
+ cur_dev->next = tmp;
+ }
+ else {
+ root = tmp;
+ }
+ cur_dev = tmp;
+
+ /* Get the Usage Page and Usage for this device. */
+ cur_dev->usage_page = get_int_property(dev, CFSTR(kIOHIDPrimaryUsagePageKey));
+ cur_dev->usage = get_int_property(dev, CFSTR(kIOHIDPrimaryUsageKey));
+
+ /* Fill out the record */
+ cur_dev->next = NULL;
+ len = make_path(dev, cbuf, sizeof(cbuf));
+ cur_dev->path = strdup(cbuf);
+
+ /* Serial Number */
+ get_serial_number(dev, buf, BUF_LEN);
+ cur_dev->serial_number = dup_wcs(buf);
+
+ /* Manufacturer and Product strings */
+ get_manufacturer_string(dev, buf, BUF_LEN);
+ cur_dev->manufacturer_string = dup_wcs(buf);
+ get_product_string(dev, buf, BUF_LEN);
+ cur_dev->product_string = dup_wcs(buf);
+
+ /* VID/PID */
+ cur_dev->vendor_id = dev_vid;
+ cur_dev->product_id = dev_pid;
+
+ /* Release Number */
+ cur_dev->release_number = get_int_property(dev, CFSTR(kIOHIDVersionNumberKey));
+
+ /* Interface Number (Unsupported on Mac)*/
+ cur_dev->interface_number = -1;
+ }
+ }
+
+ free(device_array);
+ CFRelease(device_set);
+
+ return root;
+}
+
+void HID_API_EXPORT hid_free_enumeration(struct hid_device_info *devs)
+{
+ /* This function is identical to the Linux version. Platform independent. */
+ struct hid_device_info *d = devs;
+ while (d) {
+ struct hid_device_info *next = d->next;
+ free(d->path);
+ free(d->serial_number);
+ free(d->manufacturer_string);
+ free(d->product_string);
+ free(d);
+ d = next;
+ }
+}
+
+hid_device * HID_API_EXPORT hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number)
+{
+ /* This function is identical to the Linux version. Platform independent. */
+ struct hid_device_info *devs, *cur_dev;
+ const char *path_to_open = NULL;
+ hid_device * handle = NULL;
+
+ devs = hid_enumerate(vendor_id, product_id);
+ cur_dev = devs;
+ while (cur_dev) {
+ if (cur_dev->vendor_id == vendor_id &&
+ cur_dev->product_id == product_id) {
+ if (serial_number) {
+ if (wcscmp(serial_number, cur_dev->serial_number) == 0) {
+ path_to_open = cur_dev->path;
+ break;
+ }
+ }
+ else {
+ path_to_open = cur_dev->path;
+ break;
+ }
+ }
+ cur_dev = cur_dev->next;
+ }
+
+ if (path_to_open) {
+ /* Open the device */
+ handle = hid_open_path(path_to_open);
+ }
+
+ hid_free_enumeration(devs);
+
+ return handle;
+}
+
+static void hid_device_removal_callback(void *context, IOReturn result,
+ void *sender)
+{
+ /* Stop the Run Loop for this device. */
+ hid_device *d = context;
+
+ d->disconnected = 1;
+ CFRunLoopStop(d->run_loop);
+}
+
+/* The Run Loop calls this function for each input report received.
+ This function puts the data into a linked list to be picked up by
+ hid_read(). */
+static void hid_report_callback(void *context, IOReturn result, void *sender,
+ IOHIDReportType report_type, uint32_t report_id,
+ uint8_t *report, CFIndex report_length)
+{
+ struct input_report *rpt;
+ hid_device *dev = context;
+
+ /* Make a new Input Report object */
+ rpt = calloc(1, sizeof(struct input_report));
+ rpt->data = calloc(1, report_length);
+ memcpy(rpt->data, report, report_length);
+ rpt->len = report_length;
+ rpt->next = NULL;
+
+ /* Lock this section */
+ pthread_mutex_lock(&dev->mutex);
+
+ /* Attach the new report object to the end of the list. */
+ if (dev->input_reports == NULL) {
+ /* The list is empty. Put it at the root. */
+ dev->input_reports = rpt;
+ }
+ else {
+ /* Find the end of the list and attach. */
+ struct input_report *cur = dev->input_reports;
+ int num_queued = 0;
+ while (cur->next != NULL) {
+ cur = cur->next;
+ num_queued++;
+ }
+ cur->next = rpt;
+
+ /* Pop one off if we've reached 30 in the queue. This
+ way we don't grow forever if the user never reads
+ anything from the device. */
+ if (num_queued > 30) {
+ return_data(dev, NULL, 0);
+ }
+ }
+
+ /* Signal a waiting thread that there is data. */
+ pthread_cond_signal(&dev->condition);
+
+ /* Unlock */
+ pthread_mutex_unlock(&dev->mutex);
+
+}
+
+/* This gets called when the read_thred's run loop gets signaled by
+ hid_close(), and serves to stop the read_thread's run loop. */
+static void perform_signal_callback(void *context)
+{
+ hid_device *dev = context;
+ CFRunLoopStop(dev->run_loop); /*TODO: CFRunLoopGetCurrent()*/
+}
+
+static void *read_thread(void *param)
+{
+ hid_device *dev = param;
+ SInt32 code;
+
+ /* Move the device's run loop to this thread. */
+ IOHIDDeviceScheduleWithRunLoop(dev->device_handle, CFRunLoopGetCurrent(), dev->run_loop_mode);
+
+ /* Create the RunLoopSource which is used to signal the
+ event loop to stop when hid_close() is called. */
+ CFRunLoopSourceContext ctx;
+ memset(&ctx, 0, sizeof(ctx));
+ ctx.version = 0;
+ ctx.info = dev;
+ ctx.perform = &perform_signal_callback;
+ dev->source = CFRunLoopSourceCreate(kCFAllocatorDefault, 0/*order*/, &ctx);
+ CFRunLoopAddSource(CFRunLoopGetCurrent(), dev->source, dev->run_loop_mode);
+
+ /* Store off the Run Loop so it can be stopped from hid_close()
+ and on device disconnection. */
+ dev->run_loop = CFRunLoopGetCurrent();
+
+ /* Notify the main thread that the read thread is up and running. */
+ pthread_barrier_wait(&dev->barrier);
+
+ /* Run the Event Loop. CFRunLoopRunInMode() will dispatch HID input
+ reports into the hid_report_callback(). */
+ while (!dev->shutdown_thread && !dev->disconnected) {
+ code = CFRunLoopRunInMode(dev->run_loop_mode, 1000/*sec*/, FALSE);
+ /* Return if the device has been disconnected */
+ if (code == kCFRunLoopRunFinished) {
+ dev->disconnected = 1;
+ break;
+ }
+
+
+ /* Break if The Run Loop returns Finished or Stopped. */
+ if (code != kCFRunLoopRunTimedOut &&
+ code != kCFRunLoopRunHandledSource) {
+ /* There was some kind of error. Setting
+ shutdown seems to make sense, but
+ there may be something else more appropriate */
+ dev->shutdown_thread = 1;
+ break;
+ }
+ }
+
+ /* Now that the read thread is stopping, Wake any threads which are
+ waiting on data (in hid_read_timeout()). Do this under a mutex to
+ make sure that a thread which is about to go to sleep waiting on
+ the condition acutally will go to sleep before the condition is
+ signaled. */
+ pthread_mutex_lock(&dev->mutex);
+ pthread_cond_broadcast(&dev->condition);
+ pthread_mutex_unlock(&dev->mutex);
+
+ /* Wait here until hid_close() is called and makes it past
+ the call to CFRunLoopWakeUp(). This thread still needs to
+ be valid when that function is called on the other thread. */
+ pthread_barrier_wait(&dev->shutdown_barrier);
+
+ return NULL;
+}
+
+hid_device * HID_API_EXPORT hid_open_path(const char *path)
+{
+ int i;
+ hid_device *dev = NULL;
+ CFIndex num_devices;
+
+ dev = new_hid_device();
+
+ /* Set up the HID Manager if it hasn't been done */
+ if (hid_init() < 0)
+ return NULL;
+
+ /* give the IOHIDManager a chance to update itself */
+ process_pending_events();
+
+ CFSetRef device_set = IOHIDManagerCopyDevices(hid_mgr);
+
+ num_devices = CFSetGetCount(device_set);
+ IOHIDDeviceRef *device_array = calloc(num_devices, sizeof(IOHIDDeviceRef));
+ CFSetGetValues(device_set, (const void **) device_array);
+
+ i = rand() % num_devices;
+ for (int j = 0; j < num_devices; j++) {
+ ++i;
+ if (i >= num_devices) i = 0;
+
+ char cbuf[BUF_LEN];
+ size_t len;
+ IOHIDDeviceRef os_dev = device_array[i];
+
+ len = make_path(os_dev, cbuf, sizeof(cbuf));
+ if (!strcmp(cbuf, path)) {
+ /* Matched Paths. Open this Device. */
+ IOReturn ret = IOHIDDeviceOpen(os_dev, kIOHIDOptionsTypeSeizeDevice);
+ if (ret == kIOReturnSuccess) {
+ char str[32];
+
+ free(device_array);
+ CFRetain(os_dev);
+ CFRelease(device_set);
+ dev->device_handle = os_dev;
+
+ /* Create the buffers for receiving data */
+ dev->max_input_report_len = (CFIndex) get_max_report_length(os_dev);
+ dev->input_report_buf = calloc(dev->max_input_report_len, sizeof(uint8_t));
+
+ /* Create the Run Loop Mode for this device.
+ printing the reference seems to work. */
+ sprintf(str, "HIDAPI_%p", os_dev);
+ dev->run_loop_mode =
+ CFStringCreateWithCString(NULL, str, kCFStringEncodingASCII);
+
+ /* Attach the device to a Run Loop */
+ IOHIDDeviceRegisterInputReportCallback(
+ os_dev, dev->input_report_buf, dev->max_input_report_len,
+ &hid_report_callback, dev);
+ IOHIDDeviceRegisterRemovalCallback(dev->device_handle, hid_device_removal_callback, dev);
+
+ /* Start the read thread */
+ pthread_create(&dev->thread, NULL, read_thread, dev);
+
+ /* Wait here for the read thread to be initialized. */
+ pthread_barrier_wait(&dev->barrier);
+
+ return dev;
+ }
+ else {
+ goto return_error;
+ }
+ }
+ }
+
+return_error:
+ free(device_array);
+ CFRelease(device_set);
+ free_hid_device(dev);
+ return NULL;
+}
+
+static int set_report(hid_device *dev, IOHIDReportType type, const unsigned char *data, size_t length)
+{
+ const unsigned char *data_to_send;
+ size_t length_to_send;
+ IOReturn res;
+
+ /* Return if the device has been disconnected. */
+ if (dev->disconnected)
+ return -1;
+
+ if (data[0] == 0x0) {
+ /* Not using numbered Reports.
+ Don't send the report number. */
+ data_to_send = data+1;
+ length_to_send = length-1;
+ }
+ else {
+ /* Using numbered Reports.
+ Send the Report Number */
+ data_to_send = data;
+ length_to_send = length;
+ }
+
+ if (!dev->disconnected) {
+ res = IOHIDDeviceSetReport(dev->device_handle,
+ type,
+ data[0], /* Report ID*/
+ data_to_send, length_to_send);
+
+ if (res == kIOReturnSuccess) {
+ return length;
+ }
+ else
+ return -1;
+ }
+
+ return -1;
+}
+
+int HID_API_EXPORT hid_write(hid_device *dev, const unsigned char *data, size_t length)
+{
+ return set_report(dev, kIOHIDReportTypeOutput, data, length);
+}
+
+/* Helper function, so that this isn't duplicated in hid_read(). */
+static int return_data(hid_device *dev, unsigned char *data, size_t length)
+{
+ /* Copy the data out of the linked list item (rpt) into the
+ return buffer (data), and delete the liked list item. */
+ struct input_report *rpt = dev->input_reports;
+ size_t len = (length < rpt->len)? length: rpt->len;
+ memcpy(data, rpt->data, len);
+ dev->input_reports = rpt->next;
+ free(rpt->data);
+ free(rpt);
+ return len;
+}
+
+static int cond_wait(const hid_device *dev, pthread_cond_t *cond, pthread_mutex_t *mutex)
+{
+ while (!dev->input_reports) {
+ int res = pthread_cond_wait(cond, mutex);
+ if (res != 0)
+ return res;
+
+ /* A res of 0 means we may have been signaled or it may
+ be a spurious wakeup. Check to see that there's acutally
+ data in the queue before returning, and if not, go back
+ to sleep. See the pthread_cond_timedwait() man page for
+ details. */
+
+ if (dev->shutdown_thread || dev->disconnected)
+ return -1;
+ }
+
+ return 0;
+}
+
+static int cond_timedwait(const hid_device *dev, pthread_cond_t *cond, pthread_mutex_t *mutex, const struct timespec *abstime)
+{
+ while (!dev->input_reports) {
+ int res = pthread_cond_timedwait(cond, mutex, abstime);
+ if (res != 0)
+ return res;
+
+ /* A res of 0 means we may have been signaled or it may
+ be a spurious wakeup. Check to see that there's acutally
+ data in the queue before returning, and if not, go back
+ to sleep. See the pthread_cond_timedwait() man page for
+ details. */
+
+ if (dev->shutdown_thread || dev->disconnected)
+ return -1;
+ }
+
+ return 0;
+
+}
+
+int HID_API_EXPORT hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
+{
+ int bytes_read = -1;
+
+ /* Lock the access to the report list. */
+ pthread_mutex_lock(&dev->mutex);
+
+ /* There's an input report queued up. Return it. */
+ if (dev->input_reports) {
+ /* Return the first one */
+ bytes_read = return_data(dev, data, length);
+ goto ret;
+ }
+
+ /* Return if the device has been disconnected. */
+ if (dev->disconnected) {
+ bytes_read = -1;
+ goto ret;
+ }
+
+ if (dev->shutdown_thread) {
+ /* This means the device has been closed (or there
+ has been an error. An error code of -1 should
+ be returned. */
+ bytes_read = -1;
+ goto ret;
+ }
+
+ /* There is no data. Go to sleep and wait for data. */
+
+ if (milliseconds == -1) {
+ /* Blocking */
+ int res;
+ res = cond_wait(dev, &dev->condition, &dev->mutex);
+ if (res == 0)
+ bytes_read = return_data(dev, data, length);
+ else {
+ /* There was an error, or a device disconnection. */
+ bytes_read = -1;
+ }
+ }
+ else if (milliseconds > 0) {
+ /* Non-blocking, but called with timeout. */
+ int res;
+ struct timespec ts;
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ TIMEVAL_TO_TIMESPEC(&tv, &ts);
+ ts.tv_sec += milliseconds / 1000;
+ ts.tv_nsec += (milliseconds % 1000) * 1000000;
+ if (ts.tv_nsec >= 1000000000L) {
+ ts.tv_sec++;
+ ts.tv_nsec -= 1000000000L;
+ }
+
+ res = cond_timedwait(dev, &dev->condition, &dev->mutex, &ts);
+ if (res == 0)
+ bytes_read = return_data(dev, data, length);
+ else if (res == ETIMEDOUT)
+ bytes_read = 0;
+ else
+ bytes_read = -1;
+ }
+ else {
+ /* Purely non-blocking */
+ bytes_read = 0;
+ }
+
+ret:
+ /* Unlock */
+ pthread_mutex_unlock(&dev->mutex);
+ return bytes_read;
+}
+
+int HID_API_EXPORT hid_read(hid_device *dev, unsigned char *data, size_t length)
+{
+ return hid_read_timeout(dev, data, length, (dev->blocking)? -1: 0);
+}
+
+int HID_API_EXPORT hid_set_nonblocking(hid_device *dev, int nonblock)
+{
+ /* All Nonblocking operation is handled by the library. */
+ dev->blocking = !nonblock;
+
+ return 0;
+}
+
+int HID_API_EXPORT hid_send_feature_report(hid_device *dev, const unsigned char *data, size_t length)
+{
+ return set_report(dev, kIOHIDReportTypeFeature, data, length);
+}
+
+int HID_API_EXPORT hid_get_feature_report(hid_device *dev, unsigned char *data, size_t length)
+{
+ CFIndex len = length;
+ IOReturn res;
+
+ /* Return if the device has been unplugged. */
+ if (dev->disconnected)
+ return -1;
+
+ res = IOHIDDeviceGetReport(dev->device_handle,
+ kIOHIDReportTypeFeature,
+ data[0], /* Report ID */
+ data, &len);
+ if (res == kIOReturnSuccess)
+ return len;
+ else
+ return -1;
+}
+
+
+void HID_API_EXPORT hid_close(hid_device *dev)
+{
+ if (!dev)
+ return;
+
+ /* Disconnect the report callback before close. */
+ if (!dev->disconnected) {
+ IOHIDDeviceRegisterInputReportCallback(
+ dev->device_handle, dev->input_report_buf, dev->max_input_report_len,
+ NULL, dev);
+ IOHIDDeviceRegisterRemovalCallback(dev->device_handle, NULL, dev);
+ IOHIDDeviceUnscheduleFromRunLoop(dev->device_handle, dev->run_loop, dev->run_loop_mode);
+ IOHIDDeviceScheduleWithRunLoop(dev->device_handle, CFRunLoopGetMain(), kCFRunLoopDefaultMode);
+ }
+
+ /* Cause read_thread() to stop. */
+ dev->shutdown_thread = 1;
+
+ /* Wake up the run thread's event loop so that the thread can exit. */
+ CFRunLoopSourceSignal(dev->source);
+ CFRunLoopWakeUp(dev->run_loop);
+
+ /* Notify the read thread that it can shut down now. */
+ pthread_barrier_wait(&dev->shutdown_barrier);
+
+ /* Wait for read_thread() to end. */
+ pthread_join(dev->thread, NULL);
+
+ /* Close the OS handle to the device, but only if it's not
+ been unplugged. If it's been unplugged, then calling
+ IOHIDDeviceClose() will crash. */
+ if (!dev->disconnected) {
+ IOHIDDeviceClose(dev->device_handle, kIOHIDOptionsTypeSeizeDevice);
+ }
+
+ /* Clear out the queue of received reports. */
+ pthread_mutex_lock(&dev->mutex);
+ while (dev->input_reports) {
+ return_data(dev, NULL, 0);
+ }
+ pthread_mutex_unlock(&dev->mutex);
+ CFRelease(dev->device_handle);
+
+ free_hid_device(dev);
+}
+
+int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *dev, wchar_t *string, size_t maxlen)
+{
+ return get_manufacturer_string(dev->device_handle, string, maxlen);
+}
+
+int HID_API_EXPORT_CALL hid_get_product_string(hid_device *dev, wchar_t *string, size_t maxlen)
+{
+ return get_product_string(dev->device_handle, string, maxlen);
+}
+
+int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *dev, wchar_t *string, size_t maxlen)
+{
+ return get_serial_number(dev->device_handle, string, maxlen);
+}
+
+int HID_API_EXPORT_CALL hid_get_indexed_string(hid_device *dev, int string_index, wchar_t *string, size_t maxlen)
+{
+ /* TODO: */
+
+ return 0;
+}
+
+
+HID_API_EXPORT const wchar_t * HID_API_CALL hid_error(hid_device *dev)
+{
+ /* TODO: */
+
+ return NULL;
+}
+
+
+
+
+
+
+
+#if 0
+static int32_t get_usage(IOHIDDeviceRef device)
+{
+ int32_t res;
+ res = get_int_property(device, CFSTR(kIOHIDDeviceUsageKey));
+ if (!res)
+ res = get_int_property(device, CFSTR(kIOHIDPrimaryUsageKey));
+ return res;
+}
+
+static int32_t get_usage_page(IOHIDDeviceRef device)
+{
+ int32_t res;
+ res = get_int_property(device, CFSTR(kIOHIDDeviceUsagePageKey));
+ if (!res)
+ res = get_int_property(device, CFSTR(kIOHIDPrimaryUsagePageKey));
+ return res;
+}
+
+static int get_transport(IOHIDDeviceRef device, wchar_t *buf, size_t len)
+{
+ return get_string_property(device, CFSTR(kIOHIDTransportKey), buf, len);
+}
+
+
+int main(void)
+{
+ IOHIDManagerRef mgr;
+ int i;
+
+ mgr = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
+ IOHIDManagerSetDeviceMatching(mgr, NULL);
+ IOHIDManagerOpen(mgr, kIOHIDOptionsTypeNone);
+
+ CFSetRef device_set = IOHIDManagerCopyDevices(mgr);
+
+ CFIndex num_devices = CFSetGetCount(device_set);
+ IOHIDDeviceRef *device_array = calloc(num_devices, sizeof(IOHIDDeviceRef));
+ CFSetGetValues(device_set, (const void **) device_array);
+
+ for (i = 0; i < num_devices; i++) {
+ IOHIDDeviceRef dev = device_array[i];
+ printf("Device: %p\n", dev);
+ printf(" %04hx %04hx\n", get_vendor_id(dev), get_product_id(dev));
+
+ wchar_t serial[256], buf[256];
+ char cbuf[256];
+ get_serial_number(dev, serial, 256);
+
+
+ printf(" Serial: %ls\n", serial);
+ printf(" Loc: %ld\n", get_location_id(dev));
+ get_transport(dev, buf, 256);
+ printf(" Trans: %ls\n", buf);
+ make_path(dev, cbuf, 256);
+ printf(" Path: %s\n", cbuf);
+
+ }
+
+ return 0;
+}
+#endif
projects / SCSI2SD-V6.git / commitdiff