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Make sure HID devices can be opened before making them available to the application

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This prevents a number of issues where devices are enumerated but not actually able to be opened, like https://github.com/libsdl-org/SDL/issues/5781.

We currently leave the devices open, allowing us to more easily do controller feature detection, protocol negotiation, detect dropped Bluetooth connections, etc. with the expectation that the application is likely to open the controllers shortly.
This commit is contained in:
Sam Lantinga
2022-09-22 18:22:17 -07:00
parent 2857e3c748
commit aa2e2f4843
17 changed files with 811 additions and 1072 deletions
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72
src/joystick/hidapi/SDL_hidapijoystick.c
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@@ -314,6 +314,20 @@ HIDAPI_CleanupDeviceDriver(SDL_HIDAPI_Device *device)
device->driver->FreeDevice(device);
device->driver = NULL;
SDL_LockMutex(device->dev_lock);
{
if (device->dev) {
SDL_hid_close(device->dev);
device->dev = NULL;
}
if (device->context) {
SDL_free(device->context);
device->context = NULL;
}
}
SDL_UnlockMutex(device->dev_lock);
}
static void
@@ -344,18 +358,27 @@ HIDAPI_SetupDeviceDriver(SDL_HIDAPI_Device *device)
return; /* Already setup */
}
device->driver = HIDAPI_GetDeviceDriver(device);
if (device->driver) {
const char *name = device->driver->GetDeviceName(device->name, device->vendor_id, device->product_id);
if (name && name != device->name) {
SDL_free(device->name);
device->name = SDL_strdup(name);
}
/* Make sure we can open the device and leave it open for the driver */
device->dev = SDL_hid_open_path(device->path, 0);
if (!device->dev) {
SDL_LogDebug(SDL_LOG_CATEGORY_INPUT,
"HIDAPI_SetupDeviceDriver() couldn't open %s: %s\n",
device->path, SDL_GetError());
return;
}
SDL_hid_set_nonblocking(device->dev, 1);
device->driver = HIDAPI_GetDeviceDriver(device);
/* Initialize the device, which may cause a connected event */
if (device->driver && !device->driver->InitDevice(device)) {
device->driver = NULL;
HIDAPI_CleanupDeviceDriver(device);
}
if (!device->driver && device->dev) {
/* No driver claimed this device, go ahead and close it */
SDL_hid_close(device->dev);
device->dev = NULL;
}
}
@@ -481,6 +504,32 @@ HIDAPI_JoystickInstanceIsUnique(SDL_HIDAPI_Device *device, SDL_JoystickID joysti
return SDL_TRUE;
}
void
HIDAPI_SetDeviceName(SDL_HIDAPI_Device *device, const char *name)
{
if (name && *name && SDL_strcmp(name, device->name) != 0) {
SDL_free(device->name);
device->name = SDL_strdup(name);
SDL_SetJoystickGUIDCRC(&device->guid, SDL_crc16(0, name, SDL_strlen(name)));
}
}
void
HIDAPI_SetDeviceProduct(SDL_HIDAPI_Device *device, Uint16 product_id)
{
/* Don't set the device product ID directly, or we'll constantly re-enumerate this device */
SDL_SetJoystickGUIDProduct(&device->guid, product_id);
}
void
HIDAPI_SetDeviceSerial(SDL_HIDAPI_Device *device, const char *serial)
{
if (serial && *serial && (!device->serial || SDL_strcmp(serial, device->serial) != 0)) {
SDL_free(device->serial);
device->serial = SDL_strdup(serial);
}
}
SDL_bool
HIDAPI_JoystickConnected(SDL_HIDAPI_Device *device, SDL_JoystickID *pJoystickID)
{
@@ -1102,6 +1151,13 @@ HIDAPI_JoystickOpen(SDL_Joystick *joystick, int device_index)
}
hwdata->device = device;
/* Process any pending reports before opening the device */
SDL_LockMutex(device->dev_lock);
device->updating = SDL_TRUE;
device->driver->UpdateDevice(device);
device->updating = SDL_FALSE;
SDL_UnlockMutex(device->dev_lock);
if (!device->driver->OpenJoystick(device, joystick)) {
/* The open failed, mark this device as disconnected and update devices */
HIDAPI_JoystickDisconnected(device, joystickID);