Use condition variable instead of active waiting for device event handling

With some devices and USB hardware the reconnect of a device might actually
be faster than the check interval of the active waiting loop. With mutexes
and a condition variable we will not miss the moment of reconnect anymore,
even if it is really quick (like 7ms, right DanyL?)

1 files changed, 11 insertions, 0 deletions

diff --git a/src/thread.h b/src/thread.h
index feccc94..69c6632 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -26,6 +26,9 @@
 #include <windows.h>
 typedef HANDLE thread_t;
 typedef CRITICAL_SECTION mutex_t;
+typedef struct {
+	HANDLE sem;
+} cond_t;
 typedef volatile struct {
 	LONG lock;
 	int state;
@@ -35,8 +38,10 @@ typedef volatile struct {
 #else
 #include <pthread.h>
 #include <signal.h>
+#include <sys/time.h>
 typedef pthread_t thread_t;
 typedef pthread_mutex_t mutex_t;
+typedef pthread_cond_t cond_t;
 typedef pthread_once_t thread_once_t;
 #define THREAD_ONCE_INIT PTHREAD_ONCE_INIT
 #define THREAD_ID pthread_self()
@@ -56,4 +61,10 @@ void mutex_unlock(mutex_t* mutex);
 
 void thread_once(thread_once_t *once_control, void (*init_routine)(void));
 
+void cond_init(cond_t* cond);
+void cond_destroy(cond_t* cond);
+int cond_signal(cond_t* cond);
+int cond_wait(cond_t* cond, mutex_t* mutex);
+int cond_wait_timeout(cond_t* cond, mutex_t* mutex, unsigned int timeout_ms);
+
 #endif