PTHREAD_RWLOCKATTR_GETPSHAREBSD)Programmer's MPTHREAD_RWLOCKATTR_GETPSHARED(3)
pthread_rwlockattr_getpshared - get the process shared attribute
#include <pthread.h>
int
pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr,
int *pshared);
The pthread_rwlockattr_getpshared() function is used to get the process
shared setting of a read/write lock attribute object. The setting is re-
turned via pshared, and may be one of two values:
PTHREAD_PROCESS_SHARED Any thread of any process that has access
to the memory where the read/write lock re-
sides can manipulate the lock.
PTHREAD_PROCESS_PRIVATE Only threads created within the same pro-
cess as the thread that initialized the
read/write lock can manipulate the lock.
This is the default value.
If successful, the pthread_rwlockattr_getpshared() function will return
zero. Otherwise an error number will be returned to indicate the error.
pthread_rwlockattr_getpshared() may fail if:
[EINVAL] The value specified by attr is invalid.
pthread_rwlock_init(3), pthread_rwlockattr_init(3),
pthread_rwlockattr_setpshared(3)
The pthread_rwlockattr_getpshared() function is expected to conform to
Version 2 of the Single UNIX Specification.
The pthread_rwlockattr_getpshared() function first appeared in
FreeBSD 3.0 and OpenBSD 2.5.
MirOS BSD #10-current March 22, 1999 1
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