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PTHREAD_RWLOCKATTR_SETPSHARED(3)
PTHREAD_RWLOCKATTR_SETPSHARED(3) FreeBSD Library Functions Manual PTHREAD_RWLOCKATTR_SETPSHARED(3)

NAME

pthread_rwlockattr_setpsharedset the process shared attribute

LIBRARY

POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS

#include < pthread.h>

int
pthread_rwlockattr_setpshared( pthread_rwlockattr_t *attr, int pshared);

DESCRIPTION

The pthread_rwlockattr_setpshared() function sets the process shared attribute of attr to the value referenced by pshared. The pshared argument 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_setpshared() function will return zero. Otherwise an error number will be returned to indicate the error.

ERRORS

The pthread_rwlockattr_setpshared() function will fail if:
[ EINVAL]
The value specified by attr or pshared is invalid.

STANDARDS

The pthread_rwlockattr_setpshared() function is expected to conform to Version 2 of the Single UNIX Specification (“SUSv2”).

HISTORY

The pthread_rwlockattr_setpshared() function first appeared in FreeBSD 3.0.

BUGS

The PTHREAD_PROCESS_SHARED attribute is not supported.
August 4, 1998 FreeBSD