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Use waitable timers to implement service thread timers.

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This commit is contained in:
Alexandre Julliard 1999-12-13 01:42:03 +00:00
parent 247b8aeeb9
commit 000c9800b6
2 changed files with 47 additions and 124 deletions
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154
scheduler/services.c
View file

@ -13,10 +13,6 @@
DEFAULT_DEBUG_CHANNEL(timer)
#define SERVICE_USE_OBJECT 0x0001
#define SERVICE_USE_TIMEOUT 0x0002
#define SERVICE_DISABLED 0x8000
typedef struct _SERVICE
{
struct _SERVICE *next;
@ -25,13 +21,8 @@ typedef struct _SERVICE
PAPCFUNC callback;
ULONG_PTR callback_arg;
int flags;
BOOL disabled;
HANDLE object;
long rate;
struct timeval expire;
} SERVICE;
typedef struct _SERVICETABLE
@ -43,25 +34,6 @@ typedef struct _SERVICETABLE
} SERVICETABLE;
/***********************************************************************
* SERVICE_AddTimeval
*/
static void SERVICE_AddTimeval( struct timeval *time, long delta )
{
delta += time->tv_usec;
time->tv_sec += delta / 1000000L;
time->tv_usec = delta % 1000000L;
}
/***********************************************************************
* SERVICE_DiffTimeval
*/
static long SERVICE_DiffTimeval( struct timeval *time1, struct timeval *time2 )
{
return ( time1->tv_sec - time2->tv_sec ) * 1000000L
+ ( time1->tv_usec - time2->tv_usec );
}
/***********************************************************************
* SERVICE_Loop
*/
@ -69,7 +41,6 @@ static DWORD CALLBACK SERVICE_Loop( SERVICETABLE *service )
{
HANDLE handles[MAXIMUM_WAIT_OBJECTS];
int count = 0;
DWORD timeout = INFINITE;
DWORD retval = WAIT_FAILED;
while ( TRUE )
@ -80,44 +51,24 @@ static DWORD CALLBACK SERVICE_Loop( SERVICETABLE *service )
/* Check whether some condition is fulfilled */
struct timeval curTime;
gettimeofday( &curTime, NULL );
HeapLock( GetProcessHeap() );
callback = NULL;
callback_arg = 0L;
for ( s = service->first; s; s = s->next )
{
if ( s->flags & SERVICE_DISABLED )
continue;
if (s->disabled) continue;
if ( s->flags & SERVICE_USE_OBJECT )
{
if ( retval >= WAIT_OBJECT_0 && retval < WAIT_OBJECT_0 + count )
{
if ( handles[retval - WAIT_OBJECT_0] == s->object )
{
retval = WAIT_TIMEOUT;
callback = s->callback;
callback_arg = s->callback_arg;
break;
}
}
}
if ( s->flags & SERVICE_USE_TIMEOUT )
if ( retval >= WAIT_OBJECT_0 && retval < WAIT_OBJECT_0 + count )
{
if ((s->expire.tv_sec < curTime.tv_sec) ||
((s->expire.tv_sec == curTime.tv_sec) &&
(s->expire.tv_usec <= curTime.tv_usec)))
if ( handles[retval - WAIT_OBJECT_0] == s->object )
{
SERVICE_AddTimeval( &s->expire, s->rate );
retval = WAIT_TIMEOUT;
callback = s->callback;
callback_arg = s->callback_arg;
break;
}
}
}
}
HeapUnlock( GetProcessHeap() );
@ -135,23 +86,12 @@ static DWORD CALLBACK SERVICE_Loop( SERVICETABLE *service )
HeapLock( GetProcessHeap() );
count = 0;
timeout = INFINITE;
for ( s = service->first; s; s = s->next )
{
if ( s->flags & SERVICE_DISABLED )
continue;
if (s->disabled) continue;
if ( s->flags & SERVICE_USE_OBJECT )
if ( count < MAXIMUM_WAIT_OBJECTS )
handles[count++] = s->object;
if ( s->flags & SERVICE_USE_TIMEOUT )
{
long delta = SERVICE_DiffTimeval( &s->expire, &curTime );
long time = (delta + 999L) / 1000L;
if ( time < 1 ) time = 1;
if ( time < timeout ) timeout = time;
}
if ( count < MAXIMUM_WAIT_OBJECTS )
handles[count++] = s->object;
}
HeapUnlock( GetProcessHeap() );
@ -159,11 +99,9 @@ static DWORD CALLBACK SERVICE_Loop( SERVICETABLE *service )
/* Wait until some condition satisfied */
TRACE("Waiting for %d objects with timeout %ld\n",
count, timeout );
TRACE("Waiting for %d objects\n", count );
retval = WaitForMultipleObjectsEx( count, handles,
FALSE, timeout, TRUE );
retval = WaitForMultipleObjectsEx( count, handles, FALSE, INFINITE, TRUE );
TRACE("Wait returned: %ld\n", retval );
}
@ -233,7 +171,7 @@ HANDLE SERVICE_AddObject( HANDLE object,
s->callback = callback;
s->callback_arg = callback_arg;
s->object = object;
s->flags = SERVICE_USE_OBJECT;
s->disabled = FALSE;
HeapLock( GetProcessHeap() );
@ -254,39 +192,30 @@ HANDLE SERVICE_AddObject( HANDLE object,
HANDLE SERVICE_AddTimer( LONG rate,
PAPCFUNC callback, ULONG_PTR callback_arg )
{
SERVICE *s;
SERVICETABLE *service_table;
HANDLE handle;
HANDLE handle, ret;
LARGE_INTEGER when;
if ( !rate || !callback )
return INVALID_HANDLE_VALUE;
if (PROCESS_Current()->service_table == 0 && !SERVICE_CreateServiceTable())
return INVALID_HANDLE_VALUE;
service_table = PROCESS_Current()->service_table;
handle = CreateWaitableTimerA( NULL, FALSE, NULL );
if (!handle) return INVALID_HANDLE_VALUE;
s = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(SERVICE) );
if ( !s ) return INVALID_HANDLE_VALUE;
rate = (rate + 500) / 1000; /* us -> ms */
if (!rate) rate = 1;
when.s.LowPart = when.s.HighPart = 0;
if (!SetWaitableTimer( handle, &when, rate, NULL, NULL, FALSE ))
{
CloseHandle( handle );
return INVALID_HANDLE_VALUE;
}
s->callback = callback;
s->callback_arg = callback_arg;
s->rate = rate;
s->flags = SERVICE_USE_TIMEOUT;
gettimeofday( &s->expire, NULL );
SERVICE_AddTimeval( &s->expire, s->rate );
HeapLock( GetProcessHeap() );
s->self = handle = (HANDLE)++service_table->counter;
s->next = service_table->first;
service_table->first = s;
HeapUnlock( GetProcessHeap() );
QueueUserAPC( NULL, service_table->thread, 0L );
return handle;
if ((ret = SERVICE_AddObject( handle, callback, callback_arg )) == INVALID_HANDLE_VALUE)
{
CloseHandle( handle );
return INVALID_HANDLE_VALUE;
}
return ret;
}
/***********************************************************************
@ -309,9 +238,7 @@ BOOL SERVICE_Delete( HANDLE service )
{
if ( (*s)->self == service )
{
if ( (*s)->flags & SERVICE_USE_OBJECT )
handle = (*s)->object;
handle = (*s)->object;
next = (*s)->next;
HeapFree( GetProcessHeap(), 0, *s );
*s = next;
@ -349,22 +276,7 @@ BOOL SERVICE_Enable( HANDLE service )
{
if ( s->self == service )
{
if ( s->flags & SERVICE_DISABLED )
{
s->flags &= ~SERVICE_DISABLED;
if ( s->flags & SERVICE_USE_TIMEOUT )
{
long delta;
struct timeval curTime;
gettimeofday( &curTime, NULL );
delta = SERVICE_DiffTimeval( &s->expire, &curTime );
if ( delta > 0 )
SERVICE_AddTimeval( &s->expire,
(delta / s->rate) * s->rate );
}
}
s->disabled = FALSE;
retv = TRUE;
break;
}
@ -396,7 +308,7 @@ BOOL SERVICE_Disable( HANDLE service )
{
if ( s->self == service )
{
s->flags |= SERVICE_DISABLED;
s->disabled = TRUE;
retv = TRUE;
break;
}

17
scheduler/timer.c
View file

@ -89,8 +89,9 @@ BOOL WINAPI SetWaitableTimer( HANDLE handle, const LARGE_INTEGER *when, LONG per
if (when->s.HighPart < 0) /* relative time */
{
DWORD low = ft.dwLowDateTime;
DWORD low;
GetSystemTimeAsFileTime( &ft );
low = ft.dwLowDateTime;
ft.dwLowDateTime -= when->s.LowPart;
ft.dwHighDateTime -= when->s.HighPart;
if (low < ft.dwLowDateTime) ft.dwHighDateTime--; /* overflow */
@ -100,9 +101,19 @@ BOOL WINAPI SetWaitableTimer( HANDLE handle, const LARGE_INTEGER *when, LONG per
ft.dwLowDateTime = when->s.LowPart;
ft.dwHighDateTime = when->s.HighPart;
}
if (!ft.dwLowDateTime && !ft.dwHighDateTime)
{
/* special case to start timeout on now+period without too many calculations */
req->sec = 0;
req->usec = 0;
}
else
{
req->sec = DOSFS_FileTimeToUnixTime( &ft, &remainder );
req->usec = remainder / 10; /* convert from 100-ns to us units */
}
req->handle = handle;
req->sec = DOSFS_FileTimeToUnixTime( &ft, &remainder );
req->usec = remainder / 10; /* convert from 100-ns to us units */
req->period = period;
req->callback = callback;
req->arg = arg;