utils: use g_usleep() instead of my_usleep()

Now that I've found this nice function in the GLib docs, we can
finally remove our custom sleep function.  Still all those callers of
g_usleep() have to be migrated one day to use events, instead of
regular polling.

src/decoder_api.c

@@ -24,7 +24,6 @@
 #include "audio.h"
 #include "song.h"
 
-#include "utils.h"
 #include "normalize.h"
 #include "pipe.h"
 
@@ -129,7 +128,7 @@ size_t decoder_read(struct decoder *decoder,
 
 		/* sleep for a fraction of a second! */
 		/* XXX don't sleep, wait for an event instead */
-		my_usleep(10000);
+		g_usleep(10000);
 	}
 }
 

src/output/jack_plugin.c

@@ -16,7 +16,6 @@
  */
 
 #include "../output_api.h"
-#include "../utils.h"
 #include "config.h"
 
 #include <assert.h>
@@ -421,7 +420,7 @@ mpd_jack_play(void *data, const char *buff, size_t size)
 		} else {
 			/* XXX do something more intelligent to
 			   synchronize */
-			my_usleep(1000);
+			g_usleep(1000);
 		}
 
 	}

src/output/osx_plugin.c

@@ -17,7 +17,6 @@
  */
 
 #include "../output_api.h"
-#include "../utils.h"
 
 #include <glib.h>
 #include <AudioUnit/AudioUnit.h>
@@ -171,7 +170,7 @@ osx_render(void *vdata,
 	buffer->mDataByteSize = bufferSize;
 
 	if (!bufferSize) {
-		my_usleep(1000);
+		g_usleep(1000);
 	}
 
 	return 0;

src/timer.c

@@ -17,7 +17,6 @@
  */
 
 #include "timer.h"
-#include "utils.h"
 #include "audio_format.h"
 
 #include <glib.h>
@@ -78,5 +77,5 @@ void timer_sync(Timer *timer)
 
 	sleep_duration = timer->time - now();
 	if (sleep_duration > 0)
-		my_usleep(sleep_duration);
+		g_usleep(sleep_duration);
 }

src/utils.c

@@ -40,20 +40,6 @@
 #include <windows.h>
 #endif
 
-void my_usleep(long usec)
-{
-#ifdef WIN32
-	Sleep(usec / 1000);
-#else
-	struct timeval tv;
-
-	tv.tv_sec = 0;
-	tv.tv_usec = usec;
-
-	select(0, NULL, NULL, NULL, &tv);
-#endif
-}
-
 char *parsePath(char *path)
 {
 #ifndef WIN32

src/utils.h

@@ -28,8 +28,6 @@
 	} while (0)
 #endif /* !assert_static */
 
-void my_usleep(long usec);
-
 char *parsePath(char *path);
 
 int set_nonblocking(int fd);