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server: Add helper functions to perform atomic stores. 

Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2021-09-03 16:15:26 -05:00 committed by Alexandre Julliard
parent ec6ce2ce53
commit 09dd801291
1 changed files with 32 additions and 29 deletions
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61
server/fd.c
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@ -385,41 +385,44 @@ timeout_t monotonic_time;
struct _KUSER_SHARED_DATA *user_shared_data = NULL;
static const int user_shared_data_timeout = 16;
static void atomic_store_ulong(volatile ULONG *ptr, ULONG value)
{
/* on x86 there should be total store order guarantees, so volatile is
* enough to ensure the stores aren't reordered by the compiler, and then
* they will always be seen in-order from other CPUs. On other archs, we
* need atomic intrinsics to guarantee that. */
#if defined(__i386__) || defined(__x86_64__)
*ptr = value;
#else
__atomic_store_n(ptr, value, __ATOMIC_SEQ_CST);
#endif
}
static void atomic_store_long(volatile LONG *ptr, LONG value)
{
#if defined(__i386__) || defined(__x86_64__)
*ptr = value;
#else
__atomic_store_n(ptr, value, __ATOMIC_SEQ_CST);
#endif
}
static void set_user_shared_data_time(void)
{
timeout_t tick_count = monotonic_time / 10000;
/* on X86 there should be total store order guarantees, so volatile is enough
* to ensure the stores aren't reordered by the compiler, and then they will
* always be seen in-order from other CPUs. On other archs, we need atomic
* intrinsics to guarantee that. */
#if defined(__i386__) || defined(__x86_64__)
user_shared_data->SystemTime.High2Time = current_time >> 32;
user_shared_data->SystemTime.LowPart = current_time;
user_shared_data->SystemTime.High1Time = current_time >> 32;
atomic_store_long(&user_shared_data->SystemTime.High2Time, current_time >> 32);
atomic_store_ulong(&user_shared_data->SystemTime.LowPart, current_time);
atomic_store_long(&user_shared_data->SystemTime.High1Time, current_time >> 32);
user_shared_data->InterruptTime.High2Time = monotonic_time >> 32;
user_shared_data->InterruptTime.LowPart = monotonic_time;
user_shared_data->InterruptTime.High1Time = monotonic_time >> 32;
atomic_store_long(&user_shared_data->InterruptTime.High2Time, monotonic_time >> 32);
atomic_store_ulong(&user_shared_data->InterruptTime.LowPart, monotonic_time);
atomic_store_long(&user_shared_data->InterruptTime.High1Time, monotonic_time >> 32);
user_shared_data->TickCount.High2Time = tick_count >> 32;
user_shared_data->TickCount.LowPart = tick_count;
user_shared_data->TickCount.High1Time = tick_count >> 32;
*(volatile ULONG *)&user_shared_data->TickCountLowDeprecated = tick_count;
#else
__atomic_store_n(&user_shared_data->SystemTime.High2Time, current_time >> 32, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->SystemTime.LowPart, current_time, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->SystemTime.High1Time, current_time >> 32, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->InterruptTime.High2Time, monotonic_time >> 32, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->InterruptTime.LowPart, monotonic_time, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->InterruptTime.High1Time, monotonic_time >> 32, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->TickCount.High2Time, tick_count >> 32, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->TickCount.LowPart, tick_count, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->TickCount.High1Time, tick_count >> 32, __ATOMIC_SEQ_CST);
__atomic_store_n(&user_shared_data->TickCountLowDeprecated, tick_count, __ATOMIC_SEQ_CST);
#endif
atomic_store_long(&user_shared_data->TickCount.High2Time, tick_count >> 32);
atomic_store_ulong(&user_shared_data->TickCount.LowPart, tick_count);
atomic_store_long(&user_shared_data->TickCount.High1Time, tick_count >> 32);
atomic_store_ulong(&user_shared_data->TickCountLowDeprecated, tick_count);
}
void set_current_time(void)