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pthread_rwlockattr_init(3) [osx man page]


pthread_rwlockattr_init -- initialize a read/write lock SYNOPSIS
#include <pthread.h> int pthread_rwlockattr_init(pthread_rwlockattr_t *attr); DESCRIPTION
The pthread_rwlockattr_init() function is used to initialize a read/write lock attribute object. RETURN VALUES
If successful, the pthread_rwlockattr_init() function will return zero. Otherwise, an error number will be returned to indicate the error. SEE ALSO
pthread_rwlock_init(3), pthread_rwlockattr_destroy(3), pthread_rwlockattr_getpshared(3), pthread_rwlockattr_setpshared(3) STANDARDS
The pthread_rwlockattr_init() function is expected to conform to Version 2 of the Single UNIX Specification (``SUSv2''). ERRORS
pthread_rwlockattr_init() will fail if: [ENOMEM] Insufficient memory exists to initialize the attribute object. HISTORY
The pthread_rwlockattr_init() function first appeared in FreeBSD 3.0. BSD
August 4, 1998 BSD

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pthread_rwlockattr_init(3C)											       pthread_rwlockattr_init(3C)

pthread_rwlockattr_init, pthread_rwlockattr_destroy - initialize or destroy read-write lock attributes object SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ] #include <pthread.h> int pthread_rwlockattr_init(pthread_rwlockattr_t *attr); int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr); The pthread_rwlockattr_init() function initializes a read-write lock attributes object attr with the default value for all of the attributes defined by the implementation. Results are undefined if pthread_rwlockattr_init() is called specifying an already initialized read-write lock attributes object. After a read-write lock attributes object has been used to initialize one or more read-write locks, any function affecting the attributes object (including destruction) does not affect any previously initialized read-write locks. The pthread_rwlockattr_destroy() function destroys a read-write lock attributes object. The effect of subsequent use of the object is unde- fined until the object is re-initialized by another call to pthread_rwlockattr_init(). An implementation can cause pthread_rwlock- attr_destroy() to set the object referenced by attr to an invalid value. If successful, the pthread_rwlockattr_init() and pthread_rwlockattr_destroy() functions return 0. Otherwise, an error number is returned to indicate the error. The pthread_rwlockattr_init() function will fail if: ENOMEM Insufficient memory exists to initialize the read-write lock attributes object. The pthread_rwlockattr_destroy() function may fail if: EINVAL The value specified by attr is invalid. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ pthread_rwlock_init(3C), pthread_rwlock_rdlock(3C), pthread_rwlock_unlock(3C), pthread_rwlock_wrlock(3C), pthread_rwlockattr_getp- shared(3C), attributes(5), standards(5) 23 Mar 2005 pthread_rwlockattr_init(3C)
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