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pthread_mutexattr_settype_np(3)
NAME
  pthread_mutexattr_settype_np - Specifies the mutex type attribute that is
  used when a mutex is created.

LIBRARY
  DECthreads POSIX 1003.1c Library (libpthread.so)

SYNOPSIS
  #include <pthread.h>

  int	pthread_mutexattr_settype_np(
			 pthread_mutexattr_t   *attr,
			 int		       type);

STANDARDS
  None

PARAMETERS
  attr	    Mutex attributes object whose mutex type attribute is to be
	    modified.

  type	    New value for the mutex type attribute.  The type argument
	    specifies the type of mutex that will be created.  Valid values
	    are:

	      ·
	      PTHREAD_MUTEX_NORMAL

	      ·
	      PTHREAD_MUTEX_DEFAULT (default)

	      ·
	      PTHREAD_MUTEX_RECURSIVE

	      ·
	      PTHREAD_MUTEX_ERRORCHECK

DESCRIPTION
  This routine sets the mutex type attribute that is used to determine which
  type of mutex is created based on a subsequent call to
  pthread_mutex_init(3).

NOTES
  This routine has been superseded by the pthread_mutexattr_settype(3)
  routine, as specified by the Single UNIX Specification, Version 2.

RETURN VALUES
  If an error condition occurs, this routine returns an integer value
  indicating the type of error.	 Possible return values are as follows:

  0	    Successful completion.

  [EINVAL]  The value specified by attr or type is invalid.

  [ESRCH]   The value specified by attr does not refer to an existing mutex
	    attributes object.

ERRORS
  None

RELATED INFORMATION
  Functions: pthread_mutexattr_init(3), pthread_mutexattr_gettype_np(3),
  pthread_mutex_init(3)

  Manuals: Guide to DECthreads and Programmer's Guide