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 9.99 June 12, 2016 NetBSD 9.99
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