/*
* Atomic operations
+ *
+ * (#define HEIM_BASE_ATOMICS_FALLBACK to test fallbacks.)
*/
-#if defined(HAVE_STDATOMIC_H)
+#if !defined(HEIM_BASE_ATOMICS_FALLBACK) && defined(HAVE_STDATOMIC_H)
#include <stdatomic.h>
#define heim_base_cas_32(t,e,d) heim_base_cas_32_((t), (e), (d))
#define heim_base_cas_64(t,e,d) heim_base_cas_64_((t), (e), (d))
-#elif defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
+#elif !defined(HEIM_BASE_ATOMICS_FALLBACK) && defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
#define heim_base_atomic_barrier() __sync_synchronize()
#define heim_base_cas_32(t,e,d) __sync_val_compare_and_swap((t), (e), (d))
#define heim_base_cas_64(t,e,d) __sync_val_compare_and_swap((t), (e), (d))
-#elif defined(__sun)
+#elif !defined(HEIM_BASE_ATOMICS_FALLBACK) && defined(__sun)
#include <sys/atomic.h>
#include <mbarrier.h>
#define heim_base_cas_32(t,e,d) atomic_cas_32((t), (e), (d))
#define heim_base_cas_64(t,e,d) atomic_cas_64((t), (e), (d))
-#elif defined(_AIX)
+#elif !defined(HEIM_BASE_ATOMICS_FALLBACK) && defined(_AIX)
#include <sys/atomic_op.h>
#define heim_base_cas_32(t,e,d) heim_base_cas_32_((t), (e), (d))
#define heim_base_cas_64(t,e,d) heim_base_cas_64_((t), (e), (d))
-#elif defined(_WIN32)
+#elif !defined(HEIM_BASE_ATOMICS_FALLBACK) && defined(_WIN32)
#define heim_base_atomic_barrier() MemoryBarrier()
#else
+#define heim_base_atomic(T) volatile T
+#define heim_base_atomic_barrier()
+#define heim_base_atomic_load(x) (*(x))
+#define heim_base_atomic_init(t, v) do { (*(t) = (v)); } while (0)
+#define heim_base_atomic_store(t, v) do { (*(t) = (v)); } while (0)
+
#include <heim_threads.h>
#define HEIM_BASE_NEED_ATOMIC_MUTEX 1
-extern HEIMDAL_MUTEX _heim_base_mutex;
static inline uint32_t
-heim_base_atomic_inc_32(uint32_t *x)
+heim_base_atomic_inc_32(heim_base_atomic(uint32_t) *x)
{
uint32_t t;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
t = ++(*x);
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return t;
}
static inline uint32_t
-heim_base_atomic_dec_32(uint32_t *x)
+heim_base_atomic_dec_32(heim_base_atomic(uint32_t) *x)
{
uint32_t t;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
t = --(*x);
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return t;
}
static inline uint64_t
-heim_base_atomic_inc_64(uint64_t *x)
+heim_base_atomic_inc_64(heim_base_atomic(uint64_t) *x)
{
uint64_t t;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
t = ++(*x);
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return t;
}
static inline uint64_t
-heim_base_atomic_dec_64(uint64_t *x)
+heim_base_atomic_dec_64(heim_base_atomic(uint64_t) *x)
{
uint64_t t;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
t = --(*x);
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return t;
}
static inline void *
-heim_base_exchange_pointer(void *target, void *value)
+heim_base_exchange_pointer(heim_base_atomic(void *)target, void *value)
{
void *old;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
old = *(void **)target;
*(void **)target = value;
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return old;
}
static inline uint32_t
-heim_base_exchange_32(uint32_t *p, uint32_t newval)
+heim_base_exchange_32(heim_base_atomic(uint32_t) *target, uint32_t newval)
{
uint32_t old;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
- old = *p;
- *p = newval;
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
+ old = *target;
+ *target = newval;
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return old;
}
static inline uint64_t
-heim_base_exchange_64(uint64_t *p, uint64_t newval)
+heim_base_exchange_64(heim_base_atomic(uint64_t) *target, uint64_t newval)
{
uint64_t old;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
- old = *p;
- *p = newval;
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
+ old = *target;
+ *target = newval;
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return old;
}
static inline void *
-heim_base_cas_pointer(void *target, void *expected, void *desired)
+heim_base_cas_pointer(heim_base_atomic(void *)target, void *expected, void *desired)
{
void *old;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
if ((old = *(void **)target) == expected)
*(void **)target = desired;
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return old;
}
static inline uint32_t
-heim_base_cas_32(uint32_t *p, uint32_t expected, uint32_t desired)
+heim_base_cas_32(heim_base_atomic(uint32_t) *target, uint32_t expected, uint32_t desired)
{
uint32_t old;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
- if ((old = *(uint32_t *)p) == expected)
- old = *p;
- *p = desired;
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
+ if ((old = *(uint32_t *)target) == expected)
+ *target = desired;
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return old;
}
static inline uint64_t
-heim_base_cas_64(uint64_t *p, uint64_t expected,uint64_t desired)
+heim_base_cas_64(heim_base_atomic(uint64_t) *target, uint64_t expected,uint64_t desired)
{
uint64_t old;
- HEIMDAL_MUTEX_lock(&_heim_base_mutex);
- if ((old = *(uint64_t *)p) == expected)
- old = *p;
- *p = desired;
- HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
+ HEIMDAL_MUTEX_lock(heim_base_mutex());
+ if ((old = *(uint64_t *)target) == expected)
+ *target = desired;
+ HEIMDAL_MUTEX_unlock(heim_base_mutex());
return old;
}