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hidapi, libusb: backport read_thread indefinite loop fix from mainstream 

Mainstream commit:
5ce9051e2f
main
Ozkan Sezer 2022-09-28 17:40:10 +03:00 committed by Sam Lantinga
parent 379d478055
commit 8bcbdc706c
2 changed files with 11 additions and 2 deletions
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4
src/hidapi/SDL_hidapi.c
View File

@ -738,6 +738,7 @@ static struct
);
int (LIBUSB_CALL *handle_events)(libusb_context *ctx);
int (LIBUSB_CALL *handle_events_completed)(libusb_context *ctx, int *completed);
const char * (LIBUSB_CALL *error_name)(int errcode);
} libusb_ctx;
#define libusb_init libusb_ctx.init
@ -766,6 +767,7 @@ static struct
#define libusb_interrupt_transfer libusb_ctx.interrupt_transfer
#define libusb_handle_events libusb_ctx.handle_events
#define libusb_handle_events_completed libusb_ctx.handle_events_completed
#define libusb_error_name libusb_ctx.error_name
#define hid_device LIBUSB_hid_device
#define hid_device_ LIBUSB_hid_device_
@ -843,6 +845,7 @@ SDL_libusb_get_string_descriptor(libusb_device_handle *dev,
#undef libusb_interrupt_transfer
#undef libusb_handle_events
#undef libusb_handle_events_completed
#undef libusb_error_name
#undef hid_device
#undef hid_device_
@ -1109,6 +1112,7 @@ int SDL_hid_init(void)
LOAD_LIBUSB_SYMBOL(interrupt_transfer)
LOAD_LIBUSB_SYMBOL(handle_events)
LOAD_LIBUSB_SYMBOL(handle_events_completed)
LOAD_LIBUSB_SYMBOL(error_name)
#undef LOAD_LIBUSB_SYMBOL
if (!loaded) {

9
src/hidapi/libusb/hid.c
View File

@ -1051,6 +1051,7 @@ static void LIBUSB_CALL read_callback(struct libusb_transfer *transfer)
static int SDLCALL read_thread(void *param)
{
int res;
hid_device *dev = (hid_device *)param;
uint8_t *buf;
const size_t length = dev->input_ep_max_packet_size;
@ -1069,14 +1070,18 @@ static int SDLCALL read_thread(void *param)
/* Make the first submission. Further submissions are made
from inside read_callback() */
libusb_submit_transfer(dev->transfer);
res = libusb_submit_transfer(dev->transfer);
if(res < 0) {
LOG("libusb_submit_transfer failed: %d %s. Stopping read_thread from running\n", res, libusb_error_name(res));
dev->shutdown_thread = 1;
dev->transfer_loop_finished = 1;
}
/* Notify the main thread that the read thread is up and running. */
SDL_WaitThreadBarrier(&dev->barrier);
/* Handle all the events. */
while (!dev->shutdown_thread) {
int res;
res = libusb_handle_events(usb_context);
if (res < 0) {
/* There was an error. */