remove no longer needed dummy_interrupt mutex

diff --git a/xpcu.c b/xpcu.c
index 369fb6236804b835a33fb76b8e8d1f25b385ca35..d8b42e0bf74fe039db5ddc3cc62536f301c74370 100644 (file)
--- a/xpcu.c
+++ b/xpcu.c
@@ -26,7 +26,6 @@ struct xpcu_event_s {
 };
 
 static struct usb_bus *busses = NULL;
-static pthread_mutex_t dummy_interrupt = PTHREAD_MUTEX_INITIALIZER;
 
 int xpcu_deviceinfo(struct usb_get_device_data *ugdd) {
        struct xpcu_s *xpcu = (struct xpcu_s*)ugdd->dwUniqueID;
@@ -489,21 +488,20 @@ int xpcu_close(struct event *e) {
 
 int xpcu_int_state(struct interrupt *it, int enable) {
        struct xpcu_event_s *xpcu_event = (struct xpcu_event_s*)it->hInterrupt;
-       pthread_mutex_t *interrupt = &dummy_interrupt;
 
-       if (xpcu_event)
-               interrupt = &xpcu_event->interrupt;
+       if (!xpcu_event)
+               return -ENODEV;
        
        if (enable == ENABLE_INTERRUPT) {
                it->fEnableOk = 1;
                it->fStopped = 0;
                it->dwCounter = 0;
-               pthread_mutex_trylock(interrupt);
+               pthread_mutex_trylock(&xpcu_event->interrupt);
        } else {
                it->dwCounter = 0;
                it->fStopped = 1;
-               if (pthread_mutex_trylock(interrupt) == EBUSY)
-                       pthread_mutex_unlock(interrupt);
+               if (pthread_mutex_trylock(&xpcu_event->interrupt) == EBUSY)
+                       pthread_mutex_unlock(&xpcu_event->interrupt);
        }
 
        return 0;
@@ -512,18 +510,16 @@ int xpcu_int_state(struct interrupt *it, int enable) {
 int xpcu_int_wait(struct interrupt *it) {
        struct xpcu_event_s *xpcu_event = (struct xpcu_event_s*)it->hInterrupt;
 
-       if (xpcu_event) {
-               if (it->dwCounter < xpcu_event->count) {
-                       it->dwCounter++;
-               } else {
-                       pthread_mutex_lock(&xpcu_event->interrupt);
-                       pthread_mutex_unlock(&xpcu_event->interrupt);
-               }
-               xpcu_event->interrupt_count++;
+       if (!xpcu_event)
+               return -ENODEV;
+
+       if (it->dwCounter < xpcu_event->count) {
+               it->dwCounter++;
        } else {
-               pthread_mutex_lock(&dummy_interrupt);
-               pthread_mutex_unlock(&dummy_interrupt);
+               pthread_mutex_lock(&xpcu_event->interrupt);
+               pthread_mutex_unlock(&xpcu_event->interrupt);
        }
+       xpcu_event->interrupt_count++;
 
        return 0;
 }