Loading...
--- xnu/xnu-3789.70.16/iokit/Kernel/IOTimerEventSource.cpp
+++ xnu/xnu-517/iokit/Kernel/IOTimerEventSource.cpp
@@ -1,19 +1,16 @@
/*
- * Copyright (c) 1998-2000, 2009-2010 Apple Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
@@ -23,7 +20,18 @@
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * IOTimerEventSource.cpp
+ *
+ * HISTORY
+ * 2-Feb-1999 Joe Liu (jliu) created.
+ * 1999-10-14 Godfrey van der Linden(gvdl)
+ * Revamped to use thread_call APIs
+ *
*/
#include <sys/cdefs.h>
@@ -40,10 +48,6 @@
#include <IOKit/IOWorkLoop.h>
#include <IOKit/IOTimeStamp.h>
-#include <IOKit/IOKitDebug.h>
-#if CONFIG_DTRACE
-#include <mach/sdt.h>
-#endif
#define super IOEventSource
OSDefineMetaClassAndStructors(IOTimerEventSource, IOEventSource)
@@ -56,41 +60,7 @@
OSMetaClassDefineReservedUnused(IOTimerEventSource, 6);
OSMetaClassDefineReservedUnused(IOTimerEventSource, 7);
-#if IOKITSTATS
-
-#define IOStatisticsInitializeCounter() \
-do { \
- IOStatistics::setCounterType(IOEventSource::reserved->counter, kIOStatisticsTimerEventSourceCounter); \
-} while (0)
-
-#define IOStatisticsOpenGate() \
-do { \
- IOStatistics::countOpenGate(me->IOEventSource::reserved->counter); \
-} while (0)
-
-#define IOStatisticsCloseGate() \
-do { \
- IOStatistics::countCloseGate(me->IOEventSource::reserved->counter); \
-} while (0)
-
-#define IOStatisticsTimeout() \
-do { \
- IOStatistics::countTimerTimeout(me->IOEventSource::reserved->counter); \
-} while (0)
-
-#else
-
-#define IOStatisticsInitializeCounter()
-#define IOStatisticsOpenGate()
-#define IOStatisticsCloseGate()
-#define IOStatisticsTimeout()
-
-#endif /* IOKITSTATS */
-
-//
-// reserved != 0 means IOTimerEventSource::timeoutAndRelease is being used,
-// not a subclassed implementation.
-//
+bool IOTimerEventSource::checkForWork() { return false; }
// Timeout handler function. This function is called by the kernel when
// the timeout interval expires.
@@ -99,92 +69,22 @@
{
IOTimerEventSource *me = (IOTimerEventSource *) self;
- IOStatisticsTimeout();
-
- if (me->enabled && me->action)
- {
- IOWorkLoop *
- wl = me->workLoop;
- if (wl)
- {
- Action doit;
- wl->closeGate();
- IOStatisticsCloseGate();
- doit = (Action) me->action;
- if (doit && me->enabled && AbsoluteTime_to_scalar(&me->abstime))
- {
- bool trace = (gIOKitTrace & kIOTraceTimers) ? true : false;
-
- if (trace)
- IOTimeStampStartConstant(IODBG_TIMES(IOTIMES_ACTION),
- VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
-
- (*doit)(me->owner, me);
-#if CONFIG_DTRACE
- DTRACE_TMR3(iotescallout__expire, Action, doit, OSObject, me->owner, void, me->workLoop);
-#endif
-
- if (trace)
- IOTimeStampEndConstant(IODBG_TIMES(IOTIMES_ACTION),
- VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
- }
- IOStatisticsOpenGate();
- wl->openGate();
+ if (me->enabled) {
+ Action doit = (Action) me->action;
+
+ if (doit) {
+ IOTimeStampConstant(IODBG_TIMES(IOTIMES_ACTION),
+ (unsigned int) doit, (unsigned int) me->owner);
+ me->closeGate();
+ (*doit)(me->owner, me);
+ me->openGate();
}
}
}
-void IOTimerEventSource::timeoutAndRelease(void * self, void * c)
-{
- IOTimerEventSource *me = (IOTimerEventSource *) self;
- /* The second parameter (a pointer) gets abused to carry an SInt32, so on LP64, "count"
- must be cast to "long" before, in order to tell GCC we're not truncating a pointer. */
- SInt32 count = (SInt32) (long) c;
-
- IOStatisticsTimeout();
-
- if (me->enabled && me->action)
- {
- IOWorkLoop *
- wl = me->reserved->workLoop;
- if (wl)
- {
- Action doit;
- wl->closeGate();
- IOStatisticsCloseGate();
- doit = (Action) me->action;
- if (doit && (me->reserved->calloutGeneration == count))
- {
- bool trace = (gIOKitTrace & kIOTraceTimers) ? true : false;
-
- if (trace)
- IOTimeStampStartConstant(IODBG_TIMES(IOTIMES_ACTION),
- VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
-
- (*doit)(me->owner, me);
-#if CONFIG_DTRACE
- DTRACE_TMR3(iotescallout__expire, Action, doit, OSObject, me->owner, void, me->workLoop);
-#endif
-
- if (trace)
- IOTimeStampEndConstant(IODBG_TIMES(IOTIMES_ACTION),
- VM_KERNEL_UNSLIDE(doit), (uintptr_t) me->owner);
- }
- IOStatisticsOpenGate();
- wl->openGate();
- }
- }
-
- me->reserved->workLoop->release();
- me->release();
-}
-
void IOTimerEventSource::setTimeoutFunc()
{
- // reserved != 0 means IOTimerEventSource::timeoutAndRelease is being used,
- // not a subclassed implementation
- reserved = IONew(ExpansionData, 1);
- calloutEntry = (void *) thread_call_allocate((thread_call_func_t) &IOTimerEventSource::timeoutAndRelease,
+ calloutEntry = (void *) thread_call_allocate((thread_call_func_t) timeout,
(thread_call_param_t) this);
}
@@ -196,8 +96,6 @@
setTimeoutFunc();
if (!calloutEntry)
return false;
-
- IOStatisticsInitializeCounter();
return true;
}
@@ -222,23 +120,13 @@
thread_call_free((thread_call_t) calloutEntry);
}
- if (reserved)
- IODelete(reserved, ExpansionData, 1);
-
super::free();
}
void IOTimerEventSource::cancelTimeout()
{
- if (reserved)
- reserved->calloutGeneration++;
- bool active = thread_call_cancel((thread_call_t) calloutEntry);
+ thread_call_cancel((thread_call_t) calloutEntry);
AbsoluteTime_to_scalar(&abstime) = 0;
- if (active && reserved)
- {
- release();
- workLoop->release();
- }
}
void IOTimerEventSource::enable()
@@ -250,20 +138,13 @@
void IOTimerEventSource::disable()
{
- if (reserved)
- reserved->calloutGeneration++;
- bool active = thread_call_cancel((thread_call_t) calloutEntry);
+ thread_call_cancel((thread_call_t) calloutEntry);
super::disable();
- if (active && reserved)
- {
- release();
- workLoop->release();
- }
}
IOReturn IOTimerEventSource::setTimeoutTicks(UInt32 ticks)
{
- return setTimeout(ticks, kTickScale);
+ return setTimeout(ticks, NSEC_PER_SEC/hz);
}
IOReturn IOTimerEventSource::setTimeoutMS(UInt32 ms)
@@ -279,12 +160,11 @@
IOReturn IOTimerEventSource::setTimeout(UInt32 interval, UInt32 scale_factor)
{
AbsoluteTime end;
-
+
clock_interval_to_deadline(interval, scale_factor, &end);
return wakeAtTime(end);
}
-#if !defined(__LP64__)
IOReturn IOTimerEventSource::setTimeout(mach_timespec_t interval)
{
AbsoluteTime end, nsecs;
@@ -297,7 +177,6 @@
return wakeAtTime(end);
}
-#endif
IOReturn IOTimerEventSource::setTimeout(AbsoluteTime interval)
{
@@ -311,7 +190,7 @@
IOReturn IOTimerEventSource::wakeAtTimeTicks(UInt32 ticks)
{
- return wakeAtTime(ticks, kTickScale);
+ return wakeAtTime(ticks, NSEC_PER_SEC/hz);
}
IOReturn IOTimerEventSource::wakeAtTimeMS(UInt32 ms)
@@ -324,34 +203,25 @@
return wakeAtTime(us, kMicrosecondScale);
}
-IOReturn IOTimerEventSource::wakeAtTime(UInt32 inAbstime, UInt32 scale_factor)
+IOReturn IOTimerEventSource::wakeAtTime(UInt32 abstime, UInt32 scale_factor)
{
AbsoluteTime end;
- clock_interval_to_absolutetime_interval(inAbstime, scale_factor, &end);
-
- return wakeAtTime(end);
-}
-
-#if !defined(__LP64__)
-IOReturn IOTimerEventSource::wakeAtTime(mach_timespec_t inAbstime)
+ clock_interval_to_absolutetime_interval(abstime, scale_factor, &end);
+
+ return wakeAtTime(end);
+}
+
+IOReturn IOTimerEventSource::wakeAtTime(mach_timespec_t abstime)
{
AbsoluteTime end, nsecs;
clock_interval_to_absolutetime_interval
- (inAbstime.tv_nsec, kNanosecondScale, &nsecs);
+ (abstime.tv_nsec, kNanosecondScale, &nsecs);
clock_interval_to_absolutetime_interval
- (inAbstime.tv_sec, kSecondScale, &end);
+ (abstime.tv_sec, kSecondScale, &end);
ADD_ABSOLUTETIME(&end, &nsecs);
return wakeAtTime(end);
-}
-#endif
-
-void IOTimerEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
-{
- super::setWorkLoop(inWorkLoop);
- if ( enabled && AbsoluteTime_to_scalar(&abstime) && workLoop )
- wakeAtTime(abstime);
}
IOReturn IOTimerEventSource::wakeAtTime(AbsoluteTime inAbstime)
@@ -360,24 +230,8 @@
return kIOReturnNoResources;
abstime = inAbstime;
- if ( enabled && AbsoluteTime_to_scalar(&inAbstime) && AbsoluteTime_to_scalar(&abstime) && workLoop )
- {
- if (reserved)
- {
- retain();
- workLoop->retain();
- reserved->workLoop = workLoop;
- reserved->calloutGeneration++;
- if (thread_call_enter1_delayed((thread_call_t) calloutEntry,
- (void *)(uintptr_t) reserved->calloutGeneration, inAbstime))
- {
- release();
- workLoop->release();
- }
- }
- else
- thread_call_enter_delayed((thread_call_t) calloutEntry, inAbstime);
- }
+ if ( enabled && AbsoluteTime_to_scalar(&abstime) )
+ thread_call_enter_delayed((thread_call_t) calloutEntry, abstime);
return kIOReturnSuccess;
}