diff options
Diffstat (limited to 'libpthread/sysdeps/viengoos/pt-spin.c')
| -rw-r--r-- | libpthread/sysdeps/viengoos/pt-spin.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/libpthread/sysdeps/viengoos/pt-spin.c b/libpthread/sysdeps/viengoos/pt-spin.c index b6978b0..6d6df7e 100644 --- a/libpthread/sysdeps/viengoos/pt-spin.c +++ b/libpthread/sysdeps/viengoos/pt-spin.c @@ -1,5 +1,5 @@ -/* Spin locks. L4 version. - Copyright (C) 2000, 2004 Free Software Foundation, Inc. +/* Spin locks. Viengoos version. + Copyright (C) 2000, 2004, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -17,7 +17,9 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <l4.h> +#ifdef USE_L4 +# include <l4.h> +#endif #include <pthread.h> #include <sched.h> @@ -38,12 +40,16 @@ int __pthread_spin_count = __PTHREAD_SPIN_COUNT; int _pthread_spin_lock (__pthread_spinlock_t *lock) { - l4_time_t timeout; int i; +#ifdef USE_L4 /* Start with a small timeout of 2 microseconds, then back off exponentially. */ + l4_time_t timeout; timeout = l4_time_period (2); +#else +# warning Don't know how to sleep on this platform. +#endif while (1) { @@ -52,11 +58,14 @@ _pthread_spin_lock (__pthread_spinlock_t *lock) if (__pthread_spin_trylock (lock) == 0) return 0; } + +#ifdef USE_L4 l4_sleep (timeout); timeout = l4_time_mul2 (timeout); if (timeout == L4_NEVER) timeout = L4_TIME_PERIOD_MAX; +#endif } } |