Set the process-shared attribute in mutex attribute object
Synopsis:
#include <pthread.h>
int pthread_mutexattr_setpshared(
pthread_mutexattr_t* attr,
int pshared );
Arguments:
- attr
- A pointer to the pthread_mutexattr_t object that you
want to set the attribute in.
- pshared
- The new value of the process-shared attribute; one of:
- PTHREAD_PROCESS_SHARED — any thread that has
access to the memory where the mutex is allocated can operate on
it, even if the mutex is allocated in memory that's shared by multiple
processes.
- PTHREAD_PROCESS_PRIVATE — the mutex can
be accessed only by threads created within the same process as the
thread that initialized the mutex; if threads from other
processes try to access the PTHREAD_PROCESS_PRIVATE
mutex, the behavior is undefined.
The default value of the process-shared attribute is
PTHREAD_PROCESS_PRIVATE.
Library:
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
Description:
The pthread_mutexattr_setpshared() function sets the
process-shared attribute in a mutex attribute object, attr,
to the value given by pshared.
Returns:
- EOK
- Success.
- EINVAL
- The new value specified in pshared isn't
PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.
Classification:
POSIX 1003.1 TSH
| Safety: |
|
|---|
| Cancellation point |
No |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |