/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2018 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* 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
* 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.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
+/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
* All Rights Reserved.
- *
+ *
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
- *
+ *
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
+ *
* Carnegie Mellon requests users of this software to return to
- *
+ *
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
- *
+ *
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
-/*
- */
#include <mach/kern_return.h>
#include <mach/port.h>
int precise_user_kernel_time = 1;
#endif
-/*
- * timer_init initializes a timer.
- */
void
-timer_init(
- timer_t timer)
+timer_init(timer_t timer)
{
- timer->tstamp = 0;
-#if defined(__LP64__)
- timer->all_bits = 0;
-#else
- timer->low_bits = 0;
- timer->high_bits = 0;
- timer->high_bits_check = 0;
-#endif /* defined(__LP64__) */
+ memset(timer, 0, sizeof(*timer));
}
-/*
- * Calculate the difference between a timer
- * and saved value, and update the saved value.
- */
uint64_t
-timer_delta(
- timer_t timer,
- uint64_t *save)
+timer_delta(timer_t timer, uint64_t *prev_in_cur_out)
{
- uint64_t new, old = *save;
-
- *save = new = timer_grab(timer);
-
+ uint64_t old = *prev_in_cur_out;
+ uint64_t new = *prev_in_cur_out = timer_grab(timer);
return (new - old);
}
-void
-timer_advance(
- timer_t timer,
- uint64_t delta)
+static void
+timer_advance(timer_t timer, uint64_t delta)
{
-#if defined(__LP64__)
+#if defined(__LP64__)
timer->all_bits += delta;
-#else
- uint64_t low;
-
- low = delta + timer->low_bits;
- if (low >> 32)
- timer_update(timer, (uint32_t)(timer->high_bits + (low >> 32)), (uint32_t)low);
- else
+#else /* defined(__LP64__) */
+ extern void timer_advance_internal_32(timer_t timer, uint32_t high,
+ uint32_t low);
+ uint64_t low = delta + timer->low_bits;
+ if (low >> 32) {
+ timer_advance_internal_32(timer,
+ (uint32_t)(timer->high_bits + (low >> 32)), (uint32_t)low);
+ } else {
timer->low_bits = (uint32_t)low;
-#endif /* defined(__LP64__) */
+ }
+#endif /* defined(__LP64__) */
}
void
-timer_start(
- timer_t timer,
- uint64_t tstamp)
+timer_start(timer_t timer, uint64_t tstamp)
{
timer->tstamp = tstamp;
}
void
-timer_stop(
- timer_t timer,
- uint64_t tstamp)
+timer_stop(timer_t timer, uint64_t tstamp)
{
timer_advance(timer, tstamp - timer->tstamp);
}
-/*
- * Update the timer and start a new one.
- */
void
-timer_switch(
- timer_t timer,
- uint64_t tstamp,
- timer_t new_timer)
+timer_update(timer_t timer, uint64_t tstamp)
+{
+ timer_advance(timer, tstamp - timer->tstamp);
+ timer->tstamp = tstamp;
+}
+
+void
+timer_switch(timer_t timer, uint64_t tstamp, timer_t new_timer)
{
timer_advance(timer, tstamp - timer->tstamp);
new_timer->tstamp = tstamp;
}
/*
- * Update the current thread timer and
- * start the new timer. Requires a current
- * and new timer.
+ * Update the current processor's thread timer with `tstamp` and switch the
+ * processor's thread timer to `new_timer`.
*
- * Called with interrupts disabled.
+ * Called with interrupts disabled.
*/
void
-thread_timer_event(
- uint64_t tstamp,
- timer_t new_timer)
+processor_timer_switch_thread(uint64_t tstamp, timer_t new_timer)
{
- processor_t processor = current_processor();
- timer_t timer;
+ processor_t processor = current_processor();
+ timer_t timer;
- /*
- * Update current timer.
- */
+ /* Update current timer. */
timer = PROCESSOR_DATA(processor, thread_timer);
timer_advance(timer, tstamp - timer->tstamp);
- /*
- * Start new timer.
- */
+ /* Start new timer. */
PROCESSOR_DATA(processor, thread_timer) = new_timer;
new_timer->tstamp = tstamp;
}
projects / apple / xnu.git / blobdiff