threadinfo.c File Reference

Getting thread information - Linux version. More...

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/types.h>
#include <linux/dirent.h>
#include <linux/unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <l4/log/l4log.h>
#include "threadinfo.h"
#include "service.h"
#include "debug.h"

Defines
#define	_GNU_SOURCE   1
#define	__KERNEL__
#define	DIRENT_BUF_SIZE   4096
Functions
int	getdents (unsigned int fd, struct dirent *dirp, unsigned int count)
int	getdents (uint fd, struct dirent *dirp, uint count)
static int	getnum (const char *buf)
	return the number given in buf or -1 if something else
int	get_thread_info (thread_t pid, thread_info_t *thread, thread_t *next_pid)
	Return prio and time of a given pid.
int	get_thread_name (thread_info_t *thread)
	Return name of a thread, no-op in Linux.
int	get_thread_values (load_display_t *disp)
	Read thread-values into load-display struct.

---

Detailed Description

Getting thread information - Linux version.

Date:

01/19/2004

Author:

Jork Loeser <jork.loeser@inf.tu-dresden.de>

---

Function Documentation

int get_thread_info	(	thread_t	pid,
		thread_info_t *	thread,
		thread_t *	next_pid
	)

Return prio and time of a given pid.

The Linux version also returns the name of the thread. Therefore, get_thread_name() is a no-op.

This function fills: tid, prio, name, abstime

Parameters:

next_pid

ignored

Returns:

-1 on error, 0 else

Referenced by get_thread_values(), and scope_update().

int get_thread_name

(

thread_info_t *

thread

)

Return name of a thread, no-op in Linux.

Return name of a thread.

Referenced by get_thread_values().

int get_thread_values

(

load_display_t *

disp

)

Read thread-values into load-display struct.

This function reads the current thread information into the given struct. The entries are read from the /proc filesystem. This functions only modifies the following arguments:

disp->list list of thread-infos, unsorted

Return values:

	disp->list_size	number of valid elements in list
	disp->array	array of thread-infos, tid-sorted
	disp->array_size	number of allocated array-elements

list and array are allocated as needed, reusing previously allocated fields.

Precondition:

Not reentrant, Must not be called in parallel.

References check_list(), get_thread_info(), and getnum().

Referenced by update_values().