| 249 |
|
} |
| 250 |
|
#endif |
| 251 |
|
|
| 252 |
< |
#ifdef __i386__ |
| 252 |
> |
/* FIXME: SheepShaver occasionnally hangs with those locks */ |
| 253 |
> |
#if 0 && (defined(__i386__) || defined(__x86_64__)) |
| 254 |
|
#define HAVE_TEST_AND_SET 1 |
| 255 |
|
static inline int testandset(volatile int *p) |
| 256 |
|
{ |
| 257 |
< |
int ret; |
| 257 |
< |
long int readval; |
| 257 |
> |
long int ret; |
| 258 |
|
/* Note: the "xchg" instruction does not need a "lock" prefix */ |
| 259 |
< |
__asm__ __volatile__("xchgl %0, %1" |
| 260 |
< |
: "=r" (ret), "=m" (*p), "=a" (readval) |
| 259 |
> |
__asm__ __volatile__("xchgl %k0, %1" |
| 260 |
> |
: "=r" (ret), "=m" (*p) |
| 261 |
|
: "0" (1), "m" (*p) |
| 262 |
|
: "memory"); |
| 263 |
|
return ret; |
| 329 |
|
|
| 330 |
|
#endif /* __GNUC__ */ |
| 331 |
|
|
| 332 |
– |
#if HAVE_TEST_AND_SET |
| 333 |
– |
#define HAVE_SPINLOCKS 1 |
| 332 |
|
typedef volatile int spinlock_t; |
| 333 |
|
|
| 334 |
|
static const spinlock_t SPIN_LOCK_UNLOCKED = 0; |
| 335 |
|
|
| 336 |
+ |
#if HAVE_TEST_AND_SET |
| 337 |
+ |
#define HAVE_SPINLOCKS 1 |
| 338 |
|
static inline void spin_lock(spinlock_t *lock) |
| 339 |
|
{ |
| 340 |
|
while (testandset(lock)); |
| 349 |
|
{ |
| 350 |
|
return !testandset(lock); |
| 351 |
|
} |
| 352 |
+ |
#else |
| 353 |
+ |
static inline void spin_lock(spinlock_t *lock) |
| 354 |
+ |
{ |
| 355 |
+ |
} |
| 356 |
+ |
|
| 357 |
+ |
static inline void spin_unlock(spinlock_t *lock) |
| 358 |
+ |
{ |
| 359 |
+ |
} |
| 360 |
+ |
|
| 361 |
+ |
static inline int spin_trylock(spinlock_t *lock) |
| 362 |
+ |
{ |
| 363 |
+ |
return 1; |
| 364 |
+ |
} |
| 365 |
|
#endif |
| 366 |
|
|
| 367 |
|
// Time data type for Time Manager emulation |
