base: expose atomic operations internally (#447)
This commit is contained in:
Luke Howard
committed by
Nico Williams
Nico Williams
parent
ec88576ace
commit
a8f0905b71
@@ -60,94 +60,6 @@
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#include <dispatch/dispatch.h>
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#endif
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#if defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
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#define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1)
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#define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1)
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#define heim_base_atomic_type unsigned int
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#define heim_base_atomic_max UINT_MAX
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#if __has_builtin(__sync_swap)
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#define heim_base_exchange_pointer(t,v) __sync_swap((t), (v))
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#else
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#define heim_base_exchange_pointer(t,v) __sync_lock_test_and_set((t), (v))
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#endif
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#elif defined(__sun)
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#include <sys/atomic.h>
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#define heim_base_atomic_inc(x) atomic_inc_uint_nv((volatile uint_t *)(x))
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#define heim_base_atomic_dec(x) atomic_dec_uint_nv((volatile uint_t *)(x))
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#define heim_base_atomic_type uint_t
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#define heim_base_atomic_max UINT_MAX
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#define heim_base_exchange_pointer(t,v) atomic_swap_ptr((volatile void *)(t), (void *)(v))
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#elif defined(_AIX)
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#include <sys/atomic_op.h>
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#define heim_base_atomic_inc(x) (fetch_and_add((atomic_p)(x)) + 1)
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#define heim_base_atomic_dec(x) (fetch_and_add((atomic_p)(x)) - 1)
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#define heim_base_atomic_type unsigned int
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#define heim_base_atomic_max UINT_MAX
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static inline void *
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heim_base_exchange_pointer(void *p, void *newval)
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{
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void *val = *(void **)p;
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while (!compare_and_swaplp((atomic_l)p, (long *)&val, (long)newval))
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;
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return val;
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}
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#elif defined(_WIN32)
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#define heim_base_atomic_inc(x) InterlockedIncrement(x)
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#define heim_base_atomic_dec(x) InterlockedDecrement(x)
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#define heim_base_atomic_type LONG
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#define heim_base_atomic_max MAXLONG
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#define heim_base_exchange_pointer(t,v) InterlockedExchangePointer((t),(v))
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#else
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#define HEIM_BASE_NEED_ATOMIC_MUTEX 1
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extern HEIMDAL_MUTEX _heim_base_mutex;
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#define heim_base_atomic_type unsigned int
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static inline heim_base_atomic_type
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heim_base_atomic_inc(heim_base_atomic_type *x)
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{
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heim_base_atomic_type t;
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HEIMDAL_MUTEX_lock(&_heim_base_mutex);
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t = ++(*x);
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HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
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return t;
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}
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static inline heim_base_atomic_type
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heim_base_atomic_dec(heim_base_atomic_type *x)
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{
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heim_base_atomic_type t;
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HEIMDAL_MUTEX_lock(&_heim_base_mutex);
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t = --(*x);
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HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
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return t;
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}
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#define heim_base_atomic_max UINT_MAX
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#endif
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/* tagged strings/object/XXX */
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#define heim_base_is_tagged(x) (((uintptr_t)(x)) & 0x3)
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@@ -36,6 +36,8 @@
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#ifndef HEIM_BASE_H
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#define HEIM_BASE_H 1
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#include "config.h"
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#include <sys/types.h>
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#if !defined(WIN32) && !defined(HAVE_DISPATCH_DISPATCH_H) && defined(ENABLE_PTHREAD_SUPPORT)
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#include <pthread.h>
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@@ -428,4 +430,109 @@ int heim_w32_setspecific(unsigned long, void *);
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void *heim_w32_getspecific(unsigned long);
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void heim_w32_service_thread_detach(void *);
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/*
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* Atomic operations
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*/
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#if defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
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#define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1)
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#define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1)
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#define heim_base_atomic_type unsigned int
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#define heim_base_atomic_max UINT_MAX
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#if __has_builtin(__sync_swap)
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#define heim_base_exchange_pointer(t,v) __sync_swap((t), (v))
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#else
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#define heim_base_exchange_pointer(t,v) __sync_lock_test_and_set((t), (v))
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#endif
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#elif defined(__sun)
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#include <sys/atomic.h>
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#define heim_base_atomic_inc(x) atomic_inc_uint_nv((volatile uint_t *)(x))
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#define heim_base_atomic_dec(x) atomic_dec_uint_nv((volatile uint_t *)(x))
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#define heim_base_atomic_type uint_t
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#define heim_base_atomic_max UINT_MAX
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#define heim_base_exchange_pointer(t,v) atomic_swap_ptr((volatile void *)(t), (void *)(v))
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#elif defined(_AIX)
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#include <sys/atomic_op.h>
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#define heim_base_atomic_inc(x) (fetch_and_add((atomic_p)(x)) + 1)
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#define heim_base_atomic_dec(x) (fetch_and_add((atomic_p)(x)) - 1)
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#define heim_base_atomic_type unsigned int
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#define heim_base_atomic_max UINT_MAX
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static inline void *
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heim_base_exchange_pointer(void *p, void *newval)
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{
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void *val = *(void **)p;
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while (!compare_and_swaplp((atomic_l)p, (long *)&val, (long)newval))
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;
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return val;
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}
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#elif defined(_WIN32)
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#define heim_base_atomic_inc(x) InterlockedIncrement(x)
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#define heim_base_atomic_dec(x) InterlockedDecrement(x)
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#define heim_base_atomic_type LONG
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#define heim_base_atomic_max MAXLONG
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#define heim_base_exchange_pointer(t,v) InterlockedExchangePointer((PVOID volatile *)(t), (PVOID)(v))
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#else
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#include "heim_threads.h"
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#define HEIM_BASE_NEED_ATOMIC_MUTEX 1
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extern HEIMDAL_MUTEX _heim_base_mutex;
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#define heim_base_atomic_type unsigned int
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static inline heim_base_atomic_type
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heim_base_atomic_inc(heim_base_atomic_type *x)
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{
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heim_base_atomic_type t;
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HEIMDAL_MUTEX_lock(&_heim_base_mutex);
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t = ++(*x);
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HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
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return t;
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}
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static inline heim_base_atomic_type
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heim_base_atomic_dec(heim_base_atomic_type *x)
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{
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heim_base_atomic_type t;
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HEIMDAL_MUTEX_lock(&_heim_base_mutex);
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t = --(*x);
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HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
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return t;
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}
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#define heim_base_atomic_max UINT_MAX
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static inline void *
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heim_base_exchange_pointer(void *target, void *value)
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{
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void *old;
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HEIMDAL_MUTEX_lock(&_heim_base_mutex);
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old = *(void **)target;
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*(void **)target = value;
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HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
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return old;
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}
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#endif /* defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH) */
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#endif /* HEIM_BASE_H */
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