THR_GETCONCURRENCY(3C) Standard C Library Functions THR_GETCONCURRENCY(3C)

NAME

thr_getconcurrency, thr_setconcurrency - get or set thread concurrency
level

SYNOPSIS

cc -mt [ flag... ] file...[ library... ]
#include <thread.h>

int thr_setconcurrency(int new_level);


int thr_getconcurrency(void);

DESCRIPTION

These functions are obsolete and maintained for compatibility only. The
thr_setconcurrency() function updates the desired concurrency level that
libthread maintains for the calling process. This value does not affect
the behavior of the calling process.


The thr_getconcurrency() function returns the current value for the
desired concurrency level.

RETURN VALUES

The thr_getconcurrency() function always returns the current value for
the desired concurrency level.


If successful, the thr_setconcurrency() function returns 0. Otherwise,
a non-zero value is returned to indicate the error.

ERRORS

The thr_setconcurrency() function will fail if:

EAGAIN
The specified concurrency level would cause a system resource
to be exceeded.


EINVAL
The value for new_level is negative.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|MT-Level | MT-Safe |
+---------------+-----------------+

SEE ALSO

thr_create(3C), attributes(7), standards(7)

May 11, 1998 THR_GETCONCURRENCY(3C)