pthread_setname_np(3) — Subroutines

NAME

pthread_setname_np − Changes the object name in the thread object for an existing thread

SYNOPSIS

#include <pthread.h>
int pthread_setname_np(
        pthread_thread_t thread,
        const char ∗name,
        void ∗mbz );

LIBRARY

DECthreads POSIX 1003.1c Library (libpthread.so)

PARAMETERS

thread
Thread object whose object name is to be changed.

name
Object name value to copy into the thread object.

mbzReserved for future use. The value must be zero (0).

DESCRIPTION

This routine changes the object name in the thread object specified by thread to the value specified by name. To set an existing thread’s object name, call this routine after creating the thread. However, with this approach your program must account for the possibility that the target thread has already exited or has been canceled before this routine is called.

The object name is a C language string and provides an identifier that is meaningful to a person debugging a DECthreads-based multithreaded application. The maximum number of characters in the object name is 31.

This routine contrasts with pthread_attr_setname_np, which changes the object name attribute in a thread attributes object that is used to create a new thread.

RETURN VALUES

If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows:

0Successful completion.

[ESRCH]
The thread specified by thread does not exist.

[EINVAL]
The length in characters of name exceeds 31.

[ENOMEM]
Insufficient memory exists to create a copy of the object name string.

ERRORS

None

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