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Many thanks to @Explorer09 Kang-Che Sung (宋岡哲).
Also add a #error stanza to XUtils.h in case somebody forgets the beautiful mess GNU forces on us.
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First stage in sanitizing the process list structure so that htop
can support other types of lists too (cgroups, filesystems, ...),
in the not-too-distant future.
This introduces struct Machine for system-wide information while
keeping process-list information in ProcessList (now much less).
Next step is to propogate this separation into each platform, to
match these core changes.
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This removes the duplication of dynamic meter/column hashtable
pointers that has come in between the Settings and ProcessList
structures - only one copy of these is needed. With the future
planned dynamic screens feature adding another pointer, let us
first clean this up before any further duplication happens.
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This includes:
- Wrap function implementations
- Pointer alignment for function signatures
- Pointer alignment for variable declarations
- Whitespace after keywords
- Whitespace after comma
- Whitespace around initializers
- Whitespace around operators
- Code indentation
- Line break for single line statements
- Misleading alignment
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Fixes #1008
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The main change is the header hight being not included in y1.
This is important if a sub-manager gets resized, e.g. a resize while
editing the Settings or in a pickFromVector selection, and afterwards,
then the sub-manager is closed, the super-ScreenManager gets resized, it
uses the correct header hight.
The header hight might have been changed since the last resize of the
super-manager in the Settings by adding/removing some meters.
This fixes new meters being hidden after added at runtime after a resize
in the main window.
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Implements support for arbitrary Performance Co-Pilot
metrics with per-process instance domains to form new
htop columns. The column-to-metric mappings are setup
using configuration files which will be documented via
man pages as part of a follow-up commit.
We provide an initial set of column configurations so
as to provide new capabilities to pcp-htop: including
configs for containers, open fd counts, scheduler run
queue time, tcp/udp bytes/calls sent/recv, delay acct,
virtual machine guests, detailed virtual memory, swap.
Note there is a change to the configuration file path
resolution algorithm introduced for 'dynamic meters'.
First, look in any custom PCP_HTOP_DIR location. Then
iterate, in priority order, users home directory, then
local sysadmins files in /etc/pcp/htop, then readonly
configuration files below /usr/share/pcp/htop. This
final location becomes the preferred place for our own
shipped meter and column files.
The Settings file (htoprc) writing code is updated to
not using the numeric identifier for dynamic columns.
The same strategy used for dynamic meters is used here
where we write Dynamic(name) so the name can be setup
once more at start. Regular (static) columns writing
to htoprc - i.e. numerically indexed - is unchanged.
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Currently htop does not support offline CPUs and hot-swapping, e.g. via
echo 0 > /sys/devices/system/cpu/cpu2/online
Split the current single cpuCount variable into activeCPUs and
existingCPUs.
Supersedes: #650
Related: #580
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This commit is based on exploratory work by Sohaib Mohamed.
The end goal is two-fold - to support addition of Meters we
build via configuration files for both the PCP platform and
for scripts ( https://github.com/htop-dev/htop/issues/526 )
Here, we focus on generic code and the PCP support. A new
class DynamicMeter is introduced - it uses the special case
'param' field handling that previously was used only by the
CPUMeter, such that every runtime-configured Meter is given
a unique identifier. Unlike with the CPUMeter this is used
internally only. When reading/writing to htoprc instead of
CPU(N) - where N is an integer param (CPU number) - we use
the string name for each meter. For example, if we have a
configuration for a DynamicMeter for some Redis metrics, we
might read and write "Dynamic(redis)". This identifier is
subsequently matched (back) up to the configuration file so
we're able to re-create arbitrary user configurations.
The PCP platform configuration file format is fairly simple.
We expand configs from several directories, including the
users homedir alongside htoprc (below htop/meters/) and also
/etc/pcp/htop/meters. The format will be described via a
new pcp-htop(5) man page, but its basically ini-style and
each Meter has one or more metric expressions associated, as
well as specifications for labels, color and so on via a dot
separated notation for individual metrics within the Meter.
A few initial sample configuration files are provided below
./pcp/meters that give the general idea. The PCP "derived"
metric specification - see pmRegisterDerived(3) - is used
as the syntax for specifying metrics in PCP DynamicMeters.
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When manipulating CPUMeters in the AvailableMeterPanel we
use the bottom 16 bits to hold the CPU number. However,
the bitmask used to extract the CPU number only masks the
lower 8 bits (0xff).
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Draw the FunctionBar within Panel_draw instead of manually throughout
the code.
Add an optional PanelClass function drawFunctionBar, to allow specific
panels to override the default FunctionBar_draw call.
Rework the code on color change, to really change all colors (selection
markers and panel headers).
Closes: #402
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Use size of actual buffers instead of magic numbers
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Information as seen by IWYU 0.12 + clang 9 on Linux
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Found by compiling with LTO:
ColumnsPanel.c: In function ‘ColumnsPanel_eventHandler’:
ColumnsPanel.c:46:59: error: potential null pointer dereference [-Werror=null-dereference]
46 | ((ListItem*)Panel_getSelected(super))->moving = this->moving;
| ^
AvailableColumnsPanel.c: In function ‘AvailableColumnsPanel_eventHandler’:
AvailableColumnsPanel.c:31:8: error: potential null pointer dereference [-Werror=null-dereference]
31 | int key = ((ListItem*) Panel_getSelected(super))->key;
| ^
AvailableMetersPanel.c: In function ‘AvailableMetersPanel_eventHandler’:
AvailableMetersPanel.c:40:24: error: potential null pointer dereference [-Werror=null-dereference]
40 | int param = selected->key & 0xff;
| ^
linux/IOPriorityPanel.c: In function ‘IOPriorityPanel_getIOPriority’:
linux/IOPriorityPanel.c:37:11: error: potential null pointer dereference [-Werror=null-dereference]
37 | return (IOPriority) ( ((ListItem*) Panel_getSelected(this))->key );
| ^
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Reasoning:
- implementation was unsound -- broke down when I added a fairly
basic macro definition expanding to a struct initializer in a *.c
file.
- made it way too easy (e.g. via otherwise totally innocuous git
commands) to end up with timestamps such that it always ran
MakeHeader.py but never used its output, leading to overbuild noise
when running what should be a null 'make'.
- but mostly: it's just an awkward way of dealing with C code.
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In the listing of Available Meters for CPUs, the list of CPUs is always
presented by counting them from one. However, if the user prefers to
count CPUs from zero, this is sometimes confusing when fine-tuning the
meters.
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Calls marked with xSnprintf shouldn't fail.
Abort program cleanly if any of them does.
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Just assume Platform_meterTypes[0] is always &CPUMeter_class for every
platform. This removes a conditional in AvailableMetersPanel_new().
Also adds some comments about the logic here. Without assuming
Platform_meterTypes[0], the (int i=1) clause in this for loop will not
make sense. (I.e. Why not (int i=0)? )
Also replaced a sprintf() call with safer snprintf() in code further
below.
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This is a work-in-progress, code is currently broken.
(Some actions, and notably, the header, are missing.)
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Set up environment to move other meters.
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UTF-8 display of big numbers.
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simplify processor data accounting (add CPUData structure)
remove Process_clone trick
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Reduces resulting code size.
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