threads and signals Post: 302270091

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Signals In HP-UX

does the way of handling, interrupting signals in HP-UX same as that of solaris. If there is difference than what it is.?:confused:

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Hi In my process there are few threads. Now, lets say all the threads are blocked for some reason or other.. now i read it somewhere that the kernel in this situation sends in some signal which can be caught. please let me know what signal is it and more details about that.. Thanks in...

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Threads and Signals

I want to handle signals in a process that involves lots of threads. Now I do know that there should be a dedicated thread that will actually be traping signals and then these signals will be ditributed to actual threads. My question is...in case a signals has been generated by a kernel for the...

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Hi all, How can I get the list of all Threads and the Total count of threads under a particular process ? Do suggest !! Awaiting for the replies !! Thanks Varun:b:

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Signals...

(posted this in the scripting forum as well, but figured it should go here) So, what's going on is this: For our program, we had to create our own shell, and if the user pressed ctrl-c just at the cmdline, then this signal would be ignored, but if there is a foreground process running, let's...

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Using Signals

How can use signals in a C program If i want a child program to signal it's parent program that it(child) program has completed the task that it was assigned.:confused:

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threads and signals

can any one give me an example of a concurrency program in threads and signals, i.e how to deliver messages between threads using signals. thanks

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Signals and semaphores

I have problem with my application. Application is running on embedded Linux machine. It's basically multiprotocol gateway that connects two industrial Ethernet networks. We are experiencing some kind of application hang every 2 to 3 days. It seems like both threads are still running but...

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Help understanding signals

I am having trouble with folowing sigset_t s; // now s represents set of signals sigemptyset(&s) ; // initialize this set and exclude all the signals from it.is it empty? sigaddset(&s,SIGILL);//this set containts only SIGILL signal sigprocmask(SIG_BLOCK,&s,NULL);//lost on this one Can...

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Help with Signals

Hi All, The problem statement is as below: Problem: A process (exe) is getting executed in background. The output of this process is getting logged in a file. After successfully running for some time the process gets terminated. In the log file following is present: ^M[7m Interrupt ^M[27m...

LEARN ABOUT XFREE86

sem_post

SEM_POST(3)						     Linux Programmer's Manual						       SEM_POST(3)

NAME

       sem_post - unlock a semaphore

SYNOPSIS

       #include <semaphore.h>

       int sem_post(sem_t *sem);

       Link with -pthread.

DESCRIPTION

       sem_post()  increments  (unlocks)  the  semaphore pointed to by sem.  If the semaphore's value consequently becomes greater than zero, then
       another process or thread blocked in a sem_wait(3) call will be woken up and proceed to lock the semaphore.

RETURN VALUE

       sem_post() returns 0 on success; on error, the value of the semaphore is left unchanged, -1 is returned, and errno is set to  indicate  the
       error.

ERRORS

       EINVAL sem is not a valid semaphore.

       EOVERFLOW
	      The maximum allowable value for a semaphore would be exceeded.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +-----------+---------------+---------+
       |Interface  | Attribute	   | Value   |
       +-----------+---------------+---------+
       |sem_post() | Thread safety | MT-Safe |
       +-----------+---------------+---------+
CONFORMING TO

       POSIX.1-2001.

NOTES

       sem_post() is async-signal-safe: it may be safely called within a signal handler.

EXAMPLE

       See sem_wait(3).

SEE ALSO

       sem_getvalue(3), sem_wait(3), sem_overview(7), signal-safety(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								    2017-03-13							       SEM_POST(3)

10 More Discussions You Might Find Interesting

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Discussion started by: kapilv

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Discussion started by: uday_kumar_spl