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ntdll: Implement thread-ID alerts using Mach semaphores on Mac. 

Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2021-11-17 20:18:53 -06:00 committed by Alexandre Julliard
parent 161d61481f
commit 842ecb45f4
1 changed files with 74 additions and 1 deletions
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75
dlls/ntdll/unix/sync.c
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@ -2341,10 +2341,14 @@ NTSTATUS WINAPI NtQueryInformationAtom( RTL_ATOM atom, ATOM_INFORMATION_CLASS cl
union tid_alert_entry
{
#ifdef __APPLE__
semaphore_t sem;
#else
HANDLE event;
#ifdef __linux__
int futex;
#endif
#endif
};
#define TID_ALERT_BLOCK_SIZE (65536 / sizeof(union tid_alert_entry))
@ -2379,6 +2383,17 @@ static union tid_alert_entry *get_tid_alert_entry( HANDLE tid )
entry = &tid_alert_blocks[block_idx][idx % TID_ALERT_BLOCK_SIZE];
#ifdef __APPLE__
if (!entry->sem)
{
semaphore_t sem;
if (semaphore_create( mach_task_self(), &sem, SYNC_POLICY_FIFO, 0 ))
return NULL;
if (InterlockedCompareExchange( (int *)&entry->sem, sem, NULL ))
semaphore_destroy( mach_task_self(), sem );
}
#else
#ifdef __linux__
if (use_futexes())
return entry;
@ -2393,6 +2408,7 @@ static union tid_alert_entry *get_tid_alert_entry( HANDLE tid )
if (InterlockedCompareExchangePointer( &entry->event, event, NULL ))
NtClose( event );
}
#endif
return entry;
}
@ -2409,6 +2425,10 @@ NTSTATUS WINAPI NtAlertThreadByThreadId( HANDLE tid )
if (!entry) return STATUS_INVALID_CID;
#ifdef __APPLE__
semaphore_signal( entry->sem );
return STATUS_SUCCESS;
#else
#ifdef __linux__
if (use_futexes())
{
@ -2420,10 +2440,11 @@ NTSTATUS WINAPI NtAlertThreadByThreadId( HANDLE tid )
#endif
return NtSetEvent( entry->event, NULL );
#endif
}
#ifdef __linux__
#if defined(__linux__) || defined(__APPLE__)
static LONGLONG get_absolute_timeout( const LARGE_INTEGER *timeout )
{
LARGE_INTEGER now;
@ -2446,6 +2467,57 @@ static LONGLONG update_timeout( ULONGLONG end )
#endif
#ifdef __APPLE__
/***********************************************************************
* NtWaitForAlertByThreadId (NTDLL.@)
*/
NTSTATUS WINAPI NtWaitForAlertByThreadId( const void *address, const LARGE_INTEGER *timeout )
{
union tid_alert_entry *entry = get_tid_alert_entry( NtCurrentTeb()->ClientId.UniqueThread );
semaphore_t sem;
ULONGLONG end;
kern_return_t ret;
TRACE( "%p %s\n", address, debugstr_timeout( timeout ) );
if (!entry) return STATUS_INVALID_CID;
sem = entry->sem;
if (timeout)
{
if (timeout->QuadPart == TIMEOUT_INFINITE)
timeout = NULL;
else
end = get_absolute_timeout( timeout );
}
for (;;)
{
if (timeout)
{
LONGLONG timeleft = update_timeout( end );
mach_timespec_t timespec;
timespec.tv_sec = timeleft / (ULONGLONG)TICKSPERSEC;
timespec.tv_nsec = (timeleft % TICKSPERSEC) * 100;
ret = semaphore_timedwait( sem, timespec );
}
else
ret = semaphore_wait( sem );
switch (ret)
{
case KERN_SUCCESS: return STATUS_ALERTED;
case KERN_ABORTED: continue;
case KERN_OPERATION_TIMED_OUT: return STATUS_TIMEOUT;
default: return STATUS_INVALID_HANDLE;
}
}
}
#else
/***********************************************************************
* NtWaitForAlertByThreadId (NTDLL.@)
*/
@ -2498,6 +2570,7 @@ NTSTATUS WINAPI NtWaitForAlertByThreadId( const void *address, const LARGE_INTEG
return status;
}
#endif
#ifdef __linux__