PTHREAD_RWLOCKATTR_GE... BSD Library Functions Manual PTHREAD_RWLOCKATTR_GE...NAMEpthread_rwlockattr_getpshared — get the process shared attribute
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr,
int *pshared);
DESCRIPTION
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.
RETURN VALUES
If successful, the pthread_rwlockattr_getpshared() function will return
zero. Otherwise an error number will be returned to indicate the error.
ERRORS
The pthread_rwlockattr_getpshared() function may fail if:
[EINVAL] The value specified by attr is invalid.
SEE ALSOpthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3),
pthread_rwlock_init(3)STANDARDS
The pthread_rwlockattr_getpshared() function is expected to conform to
Version 2 of the Single UNIX Specification (“SUSv2”).
HISTORY
The pthread_rwlockattr_getpshared() function first appeared in
FreeBSD 3.0.
BSD July 10, 2009 BSD
