Use gcc atomics and CLOCK_REALTIME for generic cpu stuff

config/cpu/generic/atomicity.h

@@ -20,24 +20,20 @@
 #ifndef _ATOMICITY_H
 #define _ATOMICITY_H	1
 
-#warning "stub atomicity functions are not atomic on this platform"
-
 typedef int _Atomic_word;
 
 static inline _Atomic_word 
 __attribute__ ((__unused__))
 __exchange_and_add(volatile _Atomic_word* mem, int val)
 {
-  int result = *mem;
-  *mem += val;
-  return result;
+  return __sync_fetch_and_add(mem, val);
 }
 
 static inline void
 __attribute__ ((__unused__))
 __atomic_add(volatile _Atomic_word* mem, int val)
 {
-  *mem += val;
+  __sync_add_and_fetch(mem, val);
 }
 
 #endif /* atomicity.h */

config/cpu/generic/cycles.h

@@ -22,17 +22,16 @@
 
 /* generic solution that is not really a solution at all */
 
-#warning You are compiling JACK on a platform for which jack/config/sysdep/cycles.h needs work
 #include <sys/time.h>
 
 typedef long cycles_t;
 
 static inline cycles_t get_cycles(void)
 {
-       struct timeval tv;
-       gettimeofday (&tv, NULL);
+       struct timespec time;
+       clock_gettime(CLOCK_REALTIME, &time);
 
-       return ((cycles_t) tv.tv_sec * 1000000) + tv.tv_usec;
+       return ((cycles_t) time.tv_sec * 1000000) + time.tv_nsec*1000;
 }
 
 #endif /* __jack_cycles_h__ */