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Sistemi operativi - Syscall pthread_exit Appunti scolastici Premium

Appunti di sistemi operativi per l'esame dei professori Cotroneo e Natella. gli argomenti trattati sono i seguenti: System call pthread_exit: name, sypnosis, description, return value, errors, examples, application usage, future directions, see also, derivation.

Esame di Sistemi operativi docente Prof. D. Cotroneo

Anteprima

ESTRATTO DOCUMENTO

pthread_exit http://www.opengroup.org/onlinepubs/007908799/xsh/pthread_exit.html

The Single UNIX ® Specification, Version 2

Copyright © 1997 The Open Group

NAME

pthread_exit - thread termination

SYNOPSIS

#include <pthread.h>

void pthread_exit(void *value_ptr);

DESCRIPTION

The pthread_exit() function terminates the calling thread and makes the value value_ptr

available to any successful join with the terminating thread. Any cancellation cleanup

handlers that have been pushed and not yet popped are popped in the reverse order that they

were pushed and then executed. After all cancellation cleanup handlers have been executed,

if the thread has any thread-specific data, appropriate destructor functions will be called in an

unspecified order. Thread termination does not release any application visible process

resources, including, but not limited to, mutexes and file descriptors, nor does it perform any

process level cleanup actions, including, but not limited to, calling any atexit() routines that

may exist.

An implicit call to pthread_exit() is made when a thread other than the thread in which

main() was first invoked returns from the start routine that was used to create it. The

function's return value serves as the thread's exit status.

The behaviour of pthread_exit() is undefined if called from a cancellation cleanup handler or

destructor function that was invoked as a result of either an implicit or explicit call to

pthread_exit().

After a thread has terminated, the result of access to local (auto) variables of the thread is

undefined. Thus, references to local variables of the exiting thread should not be used for the

pthread_exit() value_ptr parameter value.

The process exits with an exit status of 0 after the last thread has been terminated. The

behaviour is as if the implementation called exit() with a zero argument at thread termination

time.

RETURN VALUE

The pthread_exit() function cannot return to its caller.

ERRORS

No errors are defined.

The pthread_exit() function will not return an error code of [EINTR].

EXAMPLES

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DETTAGLI
Corso di laurea: Corso di laurea in ingegneria informatica
SSD:
A.A.: 2013-2014

I contenuti di questa pagina costituiscono rielaborazioni personali del Publisher N. A. di informazioni apprese con la frequenza delle lezioni di Sistemi operativi e studio autonomo di eventuali libri di riferimento in preparazione dell'esame finale o della tesi. Non devono intendersi come materiale ufficiale dell'università Napoli Federico II - Unina o del prof Cotroneo Domenico.

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