pthread_rwlockattr(3) - NetBSD Manual Pages

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PTHREAD_RWLOCKATTR(3)   NetBSD Library Functions Manual  PTHREAD_RWLOCKATTR(3)


NAME

     pthread_rwlockattr_init, pthread_rwlockattr_destroy,
     pthread_rwlockattr_getpshared, pthread_rwlockattr_setpshared -- initial-
     ize, destroy or query read/write lock attributes


LIBRARY

     POSIX Threads Library (libpthread, -lpthread)


SYNOPSIS

     #include <pthread.h>

     int
     pthread_rwlockattr_init(pthread_rwlockattr_t *attr);

     int
     pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);

     int
     pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *__restrict attr,
         int * __restrict pshared);

     int
     pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr, int pshared);


DESCRIPTION

     The pthread_rwlockattr_init() function is used to initialize a read/write
     lock attributes object.

     The pthread_rwlockattr_destroy() function is used to destroy a read/write
     lock attribute object previously created with pthread_rwlockattr_init().

     The pthread_rwlockattr_getpshared() function shall obtain the value of
     process-shared attribute from the initialized attributes object refer-
     enced by attr.

     The pthread_rwlockattr_setpshared() function shall set the process-shared
     attribute in an initialized attributes object referenced by attr.


RETURN VALUES

     If successful, all these functions return zero.  Otherwise an error num-
     ber will be returned to indicate the error.


ERRORS

     pthread_rwlockattr_init() shall fail if:

     [ENOMEM]           Insufficient memory exists to initialize the
                        read/write lock attributes object.

     pthread_rwlockattr_init() and pthread_rwlockattr_destroy() may fail if:

     [EINVAL]           The value specified by attr is invalid.

     pthread_rwlockattr_getpshared() and pthread_rwlockattr_setpshared() may
     fail if:

     [EINVAL]           The value specified by attr is invalid.


SEE ALSO

     pthread_rwlock_init(3)


STANDARDS

     Both functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').


BUGS

     The pthread_rwlockattr_getpshared() and pthread_rwlockattr_setpshared()
     functions are hidden by default since only thread shared attributes are
     supported.

NetBSD 10.1                      June 12, 2016                     NetBSD 10.1