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Set the concurrency level for a thread
#include <pthread.h>
int pthread_setconcurrency( int new_level );
- new_level
- The new value for the concurrency level.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
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.
- EOK
- Success.
- EINVAL
- Negative argument new_level.
- EAGAIN
- The value specified by new_level would cause a system resource to be exceeded.
POSIX 1003.1 XSI
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
pthread_getconcurrency()
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