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Man Pages


Manual Reference Pages  -  PTHREAD_RWLOCKATTR_GETPSHARED (3)

NAME

pthread_rwlockattr_getpshared - get the process shared attribute

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards
History

LIBRARY


.Lb libpthread

SYNOPSIS


.In 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 ALSO

pthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3), pthread_rwlock_init(3)

STANDARDS

The pthread_rwlockattr_getpshared function is expected to conform to -susv2.

HISTORY

The pthread_rwlockattr_getpshared function first appeared in
.Fx 3.0 .
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