Can anyone explain me how to use pthread_key_create() , pthread_setspecific(), pthread_getspecific() and pthread_key_delete () routines in pthreads.
Kindly state by an example. (3 Replies)
howcome that pthtreads spawn 2 extra processes?
I'm kind of new with pthreads but fork() did not act like this.
Anyone who can give me a technical explanation of what happends with mother / daughter processes?
Best regards Esaia. (2 Replies)
I have created a thread program, it is attached. My problem is that I need to loop this program multiple times, and basically reset everything including the threads created previously. I try to loop the program, the first run is fine, as always, but the second run of the program, the initialize... (0 Replies)
Hi All,
I ve written a small program to get started off with pthreads. I somehow feel the program doesnt meet the purpose. Please find the code and the output below. Please find my question at the bottom.
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
void *PrintThread1(void... (4 Replies)
How to give superuser privileges while setting the attributes like pthread_attr_setschedpolicy( )??
Even with normal user mode ,it is working fine for me.But in man pages, they have specied that to set the scheduling policy as SCHED_FIFO, the process should have superuser privileges. (0 Replies)
I have a doubt .. ( maybe I don't know ..)
Let's say , we got the folowing example ( to understand better what I mean ).
We got two POSIX threads ( pthreads ) , one receives some strings and creates a menu ( for that strings , scrollable menu ) , and another one check's to see if it has to... (2 Replies)
hi
i have a code:
I found that after exiting from child thread memory isn't freed. I commented everything which is "some actions" here, so thread's function contains only two lines. But it doesn't help.
What do I do wrong?
Thanks a lot (3 Replies)
Situation:
i have multiple pthread_create calls like this:
pthread_create(...., ThreadFunc1,.....);
pthread_create(...., ThreadFunc2,.....);
.
.
which i am using to create multiple threads.All the "ThreadFunc<i>" functions are actually calling same function "Receive" of a class using same... (3 Replies)
Hello,
I am writing a threaded program using the pthread library in linux. I have a master thread that needs to control worker threads, in particular, it has to be able to ensure that none of the worker threads will be running for a specified amount of time, even if the worker threads are... (7 Replies)
Discussion started by: andres625
7 Replies
LEARN ABOUT ULTRIX
pthread_self
PTHREAD_SELF(3) Linux Programmer's Manual PTHREAD_SELF(3)NAME
pthread_self - obtain ID of the calling thread
SYNOPSIS
#include <pthread.h>
pthread_t pthread_self(void);
Compile and link with -pthread.
DESCRIPTION
The pthread_self() function returns the ID of the calling thread. This is the same value that is returned in *thread in the pthread_cre-
ate(3) call that created this thread.
RETURN VALUE
This function always succeeds, returning the calling thread's ID.
ERRORS
This function always succeeds.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
+---------------+---------------+---------+
|Interface | Attribute | Value |
+---------------+---------------+---------+
|pthread_self() | Thread safety | MT-Safe |
+---------------+---------------+---------+
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
NOTES
POSIX.1 allows an implementation wide freedom in choosing the type used to represent a thread ID; for example, representation using either
an arithmetic type or a structure is permitted. Therefore, variables of type pthread_t can't portably be compared using the C equality
operator (==); use pthread_equal(3) instead.
Thread identifiers should be considered opaque: any attempt to use a thread ID other than in pthreads calls is nonportable and can lead to
unspecified results.
Thread IDs are guaranteed to be unique only within a process. A thread ID may be reused after a terminated thread has been joined, or a
detached thread has terminated.
The thread ID returned by pthread_self() is not the same thing as the kernel thread ID returned by a call to gettid(2).
SEE ALSO pthread_create(3), pthread_equal(3), pthreads(7)COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 2017-09-15 PTHREAD_SELF(3)
01-23-2007
