NAME

pthread_mutexattr_gettype − Obtains the mutex type attribute in the specified mutex attributes object

SYNOPSIS

#include <pthread.h>
int pthread_mutexattr_gettype(
        const pthread_mutexattr_t ∗attr,
        int ∗type );

LIBRARY

DECthreads POSIX 1003.1c Library (libpthread.so)

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

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

PARAMETERS

attrMutex attributes object whose mutex type attribute is obtained. 

typeReceives the value of the mutex type attribute. The type argument specifies the type of mutex that is created. Valid values are:

       •PTHREAD_MUTEX_NORMAL

       •PTHREAD_MUTEX_DEFAULT (default)

       •PTHREAD_MUTEX_RECURSIVE

       •PTHREAD_MUTEX_ERRORCHECK

DESCRIPTION

This routine obtains the value of the mutex type attribute in the mutex attributes object specified by the attr argument and stores it in the location specified by the type argument. See the pthread_mutexattr_settype(3) routine description for information about mutex type attributes. 

RETURN VALUES

On successful completion, this routine returns the mutex type in the location by the type argument. 

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

0Successful completion. 

[EINVAL]
The value specified by attr is invalid. 

ERRORS

None

SEE ALSO

Functions: pthread_mutexattr_init(3), pthread_mutexattr_settype(3), pthread_mutex_init(3)

Manuals: Guide to DECthreads and Programmer’s Guide