#include <pthread.h>
int pthread_setconcurrency(int concurrency);
Threadsafe: Yes
Signal Safe: No

The pthread_setconcurrency() function sets the current concurrency level for the process.

A concurrency value of 0 indicates that the threads implementation chooses the concurrency level that best suits the application. A concurrency level greater than zero indicates that the application wishes to inform the system of its desired concurrency level.

The concurrency level is not used by the OS/400 threads implementation, each user thread is always bound to a kernel thread but is stored for subsequent calls to pthread_getconcurrency().

Parameters

concurrency

(Input) The new concurrency level for the process

None.

Return Value

0

pthread_setconcurrency() was successful.

value

pthread_setconcurrency() was not successful. value is set to indicate the error condition.

If pthread_setconcurrency() was not successful, the error condition returned usually indicates one of the following errors. Under some conditions, the value returned could indicate an error other than those listed here.

[EINVAL]

The value specified for the argument is not correct.

• The <pthread.h> header file. See Header files for Pthread functions
• pthread_getconcurrency()--Get the Process Concurrency Level