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pthread_setconcurrency()

Set the concurrency level for a thread

Synopsis:

#include <pthread.h>

int pthread_setconcurrency( int new_level );

Arguments:

new_level

The new value for the concurrency level.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

QNX Neutrino doesn't support the multiplexing of user threads on top of several kernel scheduled entities. As such, the pthread_setconcurrency() and pthread_getconcurrency() functions are provided for source code compatibility but they have no effect when called. To maintain the function semantics, the new_level parameter is saved when pthread_setconcurrency() is called so that a subsequent call to pthread_getconcurrency() returns the same value.

Returns:

EOK

Success.

EINVAL

Negative argument new_level.

EAGAIN

The value specified by new_level would cause a system resource to be exceeded.

Classification:

POSIX 1003.1 XSI

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	Yes

See also:

pthread_getconcurrency()

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