PTHREAD_RWLOCKATTR_GETPSHAOpenBSD Programmer'sPTHREAD_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 returned
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 resides
can manipulate the lock.
PTHREAD_PROCESS_PRIVATE 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.
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.
OpenBSD 3.6 March 22, 1999
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