wmcpumon.c File Reference

multi CPU system monitor dockapp More...

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <string.h>
#include <poll.h>
#include <ctype.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/shm.h>
#include <xcb/xcb.h>
#include <xcb/shm.h>
#include <xcb/shape.h>
#include <xcb/xcb_event.h>
#include <xcb/xcb_image.h>
#include <xcb/xcb_atom.h>
#include <xcb/xcb_icccm.h>
#include <xcb/xcb_pixel.h>
#include <xcb/screensaver.h>
#include "wmcpumon.xpm"

Data Structures
struct	cpu_info
	collected data from /proc/stat More...
Defines
#define	SCREENSAVER
	config support screensaver
#define	MAX_CPUS   4
	how many cpus are supported
#define	_GNU_SOURCE
	we need strchrnul
Functions
void	Timeout (void)
	called from event loop
xcb_image_t *	XcbXpm2Image (xcb_connection_t *connection, xcb_colormap_t colormap, uint8_t depth, uint32_t transparent, const char *const *data, uint8_t **mask)
	Convert XPM graphic to xcb_image.
xcb_pixmap_t	CreatePixmap (const char *const *data, xcb_pixmap_t *mask)
	Create pixmap.
void	Loop (void)
	Loop.
int	Init (int argc, char *const argv[])
	Init.
void	Exit (void)
	Exit.
int	GetStat (void)
	Read stat.
int	GetMeminfo (void)
	Read meminfo.
int	GetMemory (void)
	Get memory used.
int	GetSwap (void)
	Get swap used.
void	DrawCpuGraphs (int loops)
	Draw CPU graphs.
void	DrawCpuBar (void)
	Draw CPU bar.
void	DrawMemGraphs (void)
	Draw memory information.
void	PrepareData (void)
	Prepare our graphic data.
static void	PrintVersion (void)
	Print version.
static void	PrintUsage (void)
	Print usage.
int	main (int argc, char *const argv[])
	Main entry point.
Variables
xcb_connection_t *	Connection
	connection to X11 server
xcb_screen_t *	Screen
	our screen
xcb_window_t	Window
	our window
xcb_gcontext_t	NormalGC
	normal graphic context
xcb_pixmap_t	Pixmap
	our background pixmap
xcb_pixmap_t	Image
	drawing data
int	ScreenSaverEventId
	screen saver event ids
static int	StartCpu
	first cpu nr. to use
static int	Rate
	update rate in ms
static char	WindowMode
	start in window mode
static char	Logscale
	show cpu bar in logarithmic scale
static char	AllCpus
	use aggregate numbers of all cpus
static char	JoinCpus
	aggregate numbers of two cpus
static char	UseSleep
	use sleep while screensaver runs
static const unsigned char	Log10 []
	logarithmic log10 table
struct cpu_info	CpuInfo [MAX_CPUS]
	cached cpu informations
int	Cpus
	number of cpus
static uint32_t	MemTotal
	cached memory info total memory
static uint32_t	MemFree
	cached memory info free memory
static uint32_t	Cached
	cached memory info cached memory
static uint32_t	SwapFree
	cached memory info free swap
static uint32_t	SwapTotal
	cached memory info total swap

---

Detailed Description

multi CPU system monitor dockapp

Copyright (c) 2010, 2011 by Lutz Sammer. All Rights Reserved.

Contributor(s): Bitmap and design based on wmc2d.

This file is part of wmcpumon

License: AGPLv3

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

Id:

a6aace9c23328ea7c6c0abc2ec475afa360441a8

---

Define Documentation

#define _GNU_SOURCE

we need strchrnul

#define MAX_CPUS   4

how many cpus are supported

#define SCREENSAVER

config support screensaver

---

Function Documentation

xcb_pixmap_t CreatePixmap	(	const char *const *	data,
		xcb_pixmap_t *	mask
	)

Create pixmap.

Parameters:

	data	XPM data
[out]	mask	Pixmap for data

Returns:

pixmap created from data.

void DrawCpuBar

(

void

)

Draw CPU bar.

void DrawCpuGraphs

(

int

loops

)

Draw CPU graphs.

Parameters:

loops

How many loops was collected

void DrawMemGraphs

(

void

)

Draw memory information.

void Exit

(

void

)

Exit.

int GetMeminfo

(

void

)

Read meminfo.

Returns:

-1 if failures.

FIXME: keep fd open!

int GetMemory

(

void

)

Get memory used.

Returns:

the amount of memory used in procent (0-100).

int GetStat

(

void

)

Read stat.

Returns:

-1 if failures.

FIXME: keep fd open!

int GetSwap

(

void

)

Get swap used.

Returns:

the amount of swap used in procent (0-100); -1 no swap.

int Init	(	int	argc,
		char *const	argv[]
	)

Init.

Parameters:

argc	number of arguments
argv	arguments vector

Returns:

0 if success, -1 for failure

void Loop

(

void

)

Loop.

int main	(	int	argc,
		char *const	argv[]
	)

Main entry point.

Parameters:

argc	number of arguments
argv	arguments vector

void PrepareData

(

void

)

Prepare our graphic data.

static void PrintUsage

(

void

)

[static]

Print usage.

static void PrintVersion

(

void

)

[static]

Print version.

void Timeout

(

void

)

called from event loop

Timeout call back.

xcb_image_t* XcbXpm2Image	(	xcb_connection_t *	connection,
		xcb_colormap_t	colormap,
		uint8_t	depth,
		uint32_t	transparent,
		const char *const *	data,
		uint8_t **	mask
	)

Convert XPM graphic to xcb_image.

Parameters:

	connection	XCB connection to X11 server
	colormap	window colormap
	depth	image depth
	transparent	pixel for transparent color
	data	XPM graphic data
[out]	mask	bitmap mask for transparent

Returns:

image create from the XPM data.

Warning:

supports only a subset of XPM formats.

---

Variable Documentation

char AllCpus [static]

use aggregate numbers of all cpus

uint32_t Cached [static]

cached memory info cached memory

xcb_connection_t* Connection

connection to X11 server

struct cpu_info CpuInfo[MAX_CPUS]

cached cpu informations

int Cpus

number of cpus

xcb_pixmap_t Image

drawing data

char JoinCpus [static]

aggregate numbers of two cpus

const unsigned char Log10[] [static]

Initial value:

 {
    0, 15, 23, 30, 34, 38, 42, 45, 47, 50, 52, 53, 55, 57, 58, 60, 61, 62,
    63, 65, 66, 67, 68, 69, 69, 70, 71, 72, 73, 73, 74, 75, 75, 76, 77, 77,
    78, 78, 79, 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 84, 85, 85, 86, 86,
    87, 87, 87, 88, 88, 88, 89, 89, 89, 90, 90, 90, 91, 91, 91, 92, 92, 92,
    93, 93, 93, 94, 94, 94, 94, 95, 95, 95, 95, 96, 96, 96, 96, 97, 97, 97,
    97, 98, 98, 98, 98, 99, 99, 99, 99, 99, 100,
}

logarithmic log10 table

char Logscale [static]

show cpu bar in logarithmic scale

uint32_t MemFree [static]

cached memory info free memory

uint32_t MemTotal [static]

cached memory info total memory

xcb_gcontext_t NormalGC

normal graphic context

xcb_pixmap_t Pixmap

our background pixmap

int Rate [static]

update rate in ms

xcb_screen_t* Screen

our screen

int ScreenSaverEventId

screen saver event ids

int StartCpu [static]

first cpu nr. to use

uint32_t SwapFree [static]

cached memory info free swap

uint32_t SwapTotal [static]

cached memory info total swap

char UseSleep [static]

use sleep while screensaver runs

xcb_window_t Window

our window

char WindowMode [static]

start in window mode