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base: Fix fallback atomics

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This commit is contained in:
Nicolas Williams
2023-01-11 12:59:04 -06:00
parent 08c48c10c8
commit efdd6c589d
4 changed files with 59 additions and 50 deletions
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lib/base/heimbase-atomics.h
+51 -46
View File
@@ -40,9 +40,11 @@
/*
* 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>
@@ -93,7 +95,7 @@ heim_base_cas_64_(heim_base_atomic(uint64_t)*t, uint64_t e, uint64_t d)
#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()
@@ -120,7 +122,7 @@ heim_base_cas_64_(heim_base_atomic(uint64_t)*t, uint64_t e, uint64_t d)
#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>
@@ -147,7 +149,7 @@ static inline void __heim_base_atomic_barrier(void)
#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>
@@ -213,7 +215,7 @@ heim_base_cas_64_(heim_base_atomic(uint64_t)*t, uint64_t e, uint64_t d)
#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()
@@ -232,116 +234,119 @@ heim_base_cas_64_(heim_base_atomic(uint64_t)*t, uint64_t e, uint64_t d)
#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;
}
lib/base/heimbase.c
+6 -3
View File
@@ -61,9 +61,12 @@ struct heim_base_mem {
#define PTR2BASE(ptr) (((struct heim_base *)ptr) - 1)
#define BASE2PTR(ptr) ((void *)(((struct heim_base *)ptr) + 1))
#ifdef HEIM_BASE_NEED_ATOMIC_MUTEX
HEIMDAL_MUTEX _heim_base_mutex = HEIMDAL_MUTEX_INITIALIZER;
#endif
HEIMDAL_MUTEX * HEIM_CALLCONV
heim_base_mutex(void)
{
static HEIMDAL_MUTEX _heim_base_mutex = HEIMDAL_MUTEX_INITIALIZER;
return &_heim_base_mutex;
}
/*
* Auto release structure
lib/base/log.c
+1 -1
View File
@@ -53,7 +53,7 @@ struct heim_log_facility_internal {
struct heim_log_facility_s {
char *program;
volatile heim_base_atomic(uint32_t) refs;
heim_base_atomic(uint32_t) refs;
size_t len;
struct heim_log_facility_internal *val;
};
lib/base/version-script.map
+1
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@@ -44,6 +44,7 @@ HEIMDAL_BASE_1.0 {
heim_auto_release_create;
heim_auto_release_drain;
heim_base_once_f;
heim_base_mutex;
heim_bool_create;
heim_bool_val;
heim_clear_error_message;