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ladybird/Userland/Libraries/LibCore/ElapsedTimer.cpp

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
2020-01-18 09:38:21 +01:00
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
LibGUI: Fix broken doubleclick detection due to uninitialized GElapsedTimer.
2019-04-01 22:03:32 +02:00
#include <AK/Assertions.h>
Kernel: Fix timeout support in select The scheduler expects m_select_timeout to act as a deadline. That is, it should contain the time that a task should wake at -- but we were directly copying the time from userspace, which meant that it always returned virtually immediately. At the same time, fix CEventLoop to not rely on the broken select behavior by subtracting the current time from the time of the nearest timer.
2019-05-18 02:00:01 +02:00
#include <AK/Time.h>
LibCore: Remove leading C from filenames
2020-02-06 15:04:03 +01:00
#include <LibCore/ElapsedTimer.h>
LibC: Time-related POSIX compliance fixes.
2019-03-27 01:31:53 +01:00
#include <sys/time.h>
LibCore: Use monotonic time when handling timers
2020-03-14 01:03:47 +02:00
#include <time.h>
LibGUI: Add GWidget::doubleclick_event(). Now double-clicking an item in a GTableView or GItemView will activate it.
2019-03-25 01:42:15 +01:00
LibCore: Put all classes in the Core namespace and remove the leading C I've been wanting to do this for a long time. It's time we start being consistent about how this stuff works. The new convention is: - "LibFoo" is a userspace library that provides the "Foo" namespace. That's it :^) This was pretty tedious to convert and I didn't even start on LibGUI yet. But it's coming up next.
2020-02-02 12:34:39 +01:00
namespace Core {
void ElapsedTimer::start()
LibGUI: Add GWidget::doubleclick_event(). Now double-clicking an item in a GTableView or GItemView will activate it.
2019-03-25 01:42:15 +01:00
{
LibGUI: Fix broken doubleclick detection due to uninitialized GElapsedTimer.
2019-04-01 22:03:32 +02:00
m_valid = true;
LibCore: Use monotonic time when handling timers
2020-03-14 01:03:47 +02:00
timespec now_spec;
Kernel: Improve time keeping and dramatically reduce interrupt load This implements a number of changes related to time: * If a HPET is present, it is now used only as a system timer, unless the Local APIC timer is used (in which case the HPET timer will not trigger any interrupts at all). * If a HPET is present, the current time can now be as accurate as the chip can be, independently from the system timer. We now query the HPET main counter for the current time in CPU #0's system timer interrupt, and use that as a base line. If a high precision time is queried, that base line is used in combination with quering the HPET timer directly, which should give a much more accurate time stamp at the expense of more overhead. For faster time stamps, the more coarse value based on the last interrupt will be returned. This also means that any missed interrupts should not cause the time to drift. * The default system interrupt rate is reduced to about 250 per second. * Fix calculation of Thread CPU usage by using the amount of ticks they used rather than the number of times a context switch happened. * Implement CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE and use it for most cases where precise timestamps are not needed.
2020-12-03 22:12:50 -07:00
clock_gettime(m_precise ? CLOCK_MONOTONIC : CLOCK_MONOTONIC_COARSE, &now_spec);
LibCore: Expose origin timestamp of Core::ElapsedTime
2020-09-29 18:22:53 +02:00
m_origin_time.tv_sec = now_spec.tv_sec;
m_origin_time.tv_usec = now_spec.tv_nsec / 1000;
LibGUI: Add GWidget::doubleclick_event(). Now double-clicking an item in a GTableView or GItemView will activate it.
2019-03-25 01:42:15 +01:00
}
LibCore: Put all classes in the Core namespace and remove the leading C I've been wanting to do this for a long time. It's time we start being consistent about how this stuff works. The new convention is: - "LibFoo" is a userspace library that provides the "Foo" namespace. That's it :^) This was pretty tedious to convert and I didn't even start on LibGUI yet. But it's coming up next.
2020-02-02 12:34:39 +01:00
int ElapsedTimer::elapsed() const
LibGUI: Add GWidget::doubleclick_event(). Now double-clicking an item in a GTableView or GItemView will activate it.
2019-03-25 01:42:15 +01:00
{
LibGUI: Fix broken doubleclick detection due to uninitialized GElapsedTimer.
2019-04-01 22:03:32 +02:00
ASSERT(is_valid());
LibGUI: Add GWidget::doubleclick_event(). Now double-clicking an item in a GTableView or GItemView will activate it.
2019-03-25 01:42:15 +01:00
struct timeval now;
LibCore: Use monotonic time when handling timers
2020-03-14 01:03:47 +02:00
timespec now_spec;
Kernel: Improve time keeping and dramatically reduce interrupt load This implements a number of changes related to time: * If a HPET is present, it is now used only as a system timer, unless the Local APIC timer is used (in which case the HPET timer will not trigger any interrupts at all). * If a HPET is present, the current time can now be as accurate as the chip can be, independently from the system timer. We now query the HPET main counter for the current time in CPU #0's system timer interrupt, and use that as a base line. If a high precision time is queried, that base line is used in combination with quering the HPET timer directly, which should give a much more accurate time stamp at the expense of more overhead. For faster time stamps, the more coarse value based on the last interrupt will be returned. This also means that any missed interrupts should not cause the time to drift. * The default system interrupt rate is reduced to about 250 per second. * Fix calculation of Thread CPU usage by using the amount of ticks they used rather than the number of times a context switch happened. * Implement CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE and use it for most cases where precise timestamps are not needed.
2020-12-03 22:12:50 -07:00
clock_gettime(m_precise ? CLOCK_MONOTONIC : CLOCK_MONOTONIC_COARSE, &now_spec);
LibCore: Use monotonic time when handling timers
2020-03-14 01:03:47 +02:00
now.tv_sec = now_spec.tv_sec;
now.tv_usec = now_spec.tv_nsec / 1000;
LibGUI: Add GWidget::doubleclick_event(). Now double-clicking an item in a GTableView or GItemView will activate it.
2019-03-25 01:42:15 +01:00
struct timeval diff;
LibCore: Expose origin timestamp of Core::ElapsedTime
2020-09-29 18:22:53 +02:00
timeval_sub(now, m_origin_time, diff);
LibGUI: Add GWidget::doubleclick_event(). Now double-clicking an item in a GTableView or GItemView will activate it.
2019-03-25 01:42:15 +01:00
return diff.tv_sec * 1000 + diff.tv_usec / 1000;
}
LibCore: Put all classes in the Core namespace and remove the leading C I've been wanting to do this for a long time. It's time we start being consistent about how this stuff works. The new convention is: - "LibFoo" is a userspace library that provides the "Foo" namespace. That's it :^) This was pretty tedious to convert and I didn't even start on LibGUI yet. But it's coming up next.
2020-02-02 12:34:39 +01:00
}
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