|| FreeBSD Library Functions Manual
get the process shared attribute
POSIX Threads Library (libpthread, -lpthread)
#include < pthread.h>
pthread_rwlockattr_getpshared( const pthread_rwlockattr_t *attr, int *pshared);
() function is used to get the process shared setting of a read/write lock attribute object. The setting is returned via
, and may be one of two values:
Any thread of any process that has access to the memory where the read/write lock resides can manipulate the lock.
Only threads created within the same process as the thread that initialized the read/write lock can manipulate the lock. This is the default value.
RETURN VALUES If successful, the
pthread_rwlockattr_getpshared() function will return zero. Otherwise an error number will be returned to indicate the error.
() function may fail if:
The value specified by
attr is invalid.
pthread_rwlockattr_getpshared() function is expected to conform to Version 2 of the Single UNIX Specification (“SUSv2”).
pthread_rwlockattr_getpshared() function first appeared in