PTHREAD_RWLOCKATTR_SETPSHAREBSD)Programmer's MPTHREAD_RWLOCKATTR_SETPSHARED(3)
pthread_rwlockattr_setpshared - set the process shared attribute
#include <pthread.h>
int
pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared);
The pthread_rwlockattr_setpshared() function sets the process shared at-
tribute of attr to the value referenced by pshared. pshared 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_setpshared() function will return
zero. Otherwise an error number will be returned to indicate the error.
pthread_rwlockattr_setpshared() will fail if:
[EINVAL] The value specified by attr or pshared is invalid.
pthread_rwlock_init(3), pthread_rwlockattr_init(3)
The pthread_rwlockattr_setpshared() function is expected to conform to
Version 2 of the Single UNIX Specification.
The pthread_rwlockattr_setpshared() function first appeared in
FreeBSD 3.0 and OpenBSD 2.5.
The PTHREAD_PROCESS_SHARED attribute is not supported.
MirOS BSD #10-current August 4, 1998 1
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