Get the process-shared attribute from a condition variable attribute object
Synopsis:
#include <pthread.h>
int pthread_condattr_getpshared(
const pthread_condattr_t* attr,
int* pshared );
Arguments:
- attr
- A pointer to the pthread_condattr_t object from which you
want to get the attribute.
- pshared
- A pointer to a location where the function can store the process-shared
attribute.
Library:
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
Description:
The pthread_condattr_getpshared() function stores, in the
memory pointed to by pshared, the
process-shared attribute from a condition variable attribute object, attr.
The possible values are:
- PTHREAD_PROCESS_SHARED — any thread that has
access to the memory where the condition variable is allocated can
operate on it, even if the condition variable is allocated in memory
that's shared by multiple processes.
- PTHREAD_PROCESS_PRIVATE — the condition variable
can be accessed only by threads created within the same process as the
thread that initialized the condition variable; if threads from other
processes try to access the PTHREAD_PROCESS_PRIVATE
condition variable, the behavior is undefined.
Returns:
- EOK
- Success.
- EINVAL
- Invalid condition variable attribute object specified by attr.
Classification:
POSIX 1003.1 TSH
| Safety: |
|
|---|
| Cancellation point |
No |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |