PTHREAD_MUTEXATTR_GETKIND_NP(3)               FreeBSD Library Functions Manual

NAME
     pthread_mutexattr_getkind_np, pthread_mutexattr_setkind_np - mutex
     attribute operations (legacy)

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS
     #include <pthread_np.h>

     int
     pthread_mutexattr_getkind_np(pthread_mutexattr_t attr);

     int
     pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind);

DESCRIPTION
     These functions are deprecated and non-portable implementation of the
     mutex type manipulation.

     It is recommended to use the pthread_mutexattr_gettype(3) and
     pthread_mutexattr_settype(3) functions instead.

RETURN VALUES
     The pthread_mutexattr_getkind_np() function returns a positive value
     representing the "kind" of the mutex attribute attr if successful;
     otherwise the value -1 is returned and the global variable errno is set
     to indicate the error.

     The pthread_mutexattr_setkind_np() function returns the value 0 if
     successful; otherwise the value -1 is returned and the global variable
     errno is set to indicate the error.

ERRORS
     The pthread_mutexattr_getkind_np() and pthread_mutexattr_setkind_np()
     functions will fail if:

     [EINVAL]           The value specified by attr is invalid.

SEE ALSO
     pthread_mutex_destroy(3), pthread_mutex_init(3),
     pthread_mutexattr_gettype(3), pthread_mutexattr_settype(3), pthread_np(3)

FreeBSD 13.1-RELEASE-p6        October 12, 2021        FreeBSD 13.1-RELEASE-p6