pthread_mutexattr_init man page on DigitalUNIX

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pthread_mutexattr_init(3)			     pthread_mutexattr_init(3)

       pthread_mutexattr_init - Initializes a mutex attributes object

       #include <pthread.h>

       int pthread_mutexattr_init(
	       pthread_mutexattr_t *attr );

       DECthreads POSIX 1003.1c Library (

       Interfaces  documented on this reference page conform to industry stan‐
       dards as follows:

       IEEE Std 1003.1c-1995, POSIX System Application Program Interface

       Address of the mutex attributes object to be initialized.

       This routine initializes the mutex attributes object specified  by  the
       attr  argument  with a set of default values. A mutex attributes object
       is used to specify the attributes of one or more mutexes when they  are
       created.	 The attributes object created by this routine is used only in
       calls to the pthread_mutex_init(3) routine.

       When a mutex attributes object is used to create a mutex, the values of
       the  individual	attributes  determine  the  characteristics of the new
       mutex.  Thus, attributes objects act as additional arguments  to	 mutex
       creation.   Changing individual attributes in an attributes object does
       not  affect  any	 mutexes  that	were  previously  created  using  that
       attributes object.

       You  can	 use  the  same mutex attributes object in successive calls to
       pthread_mutex_init(3), from any thread. If multiple threads can	change
       attributes in a shared mutex attributes object, your program must use a
       mutex to protect the integrity of the attributes object's contents.

       Results are undefined if this routine is called and the	attr  argument
       specifies a mutex attributes object that is already initialized.

       If  an  error  condition	 occurs, this routine returns an integer value
       indicating the type of error. Possible return values  are  as  follows:
       Successful   completion.	  Insufficient	memory	to  create  the	 mutex
       attributes object.


       Functions: pthread_mutexattr_destroy(3),	 pthread_mutexattr_gettype(3),
       pthread_mutexattr_settype(3), pthread_mutex_init(3)

       Manuals: Guide to DECthreads and Programmer's Guide


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