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pthread_condattr_init ()
  • >> pthread_condattr_init (3) ( Solaris man: Библиотечные вызовы )
  • pthread_condattr_init (3) ( FreeBSD man: Библиотечные вызовы )
  • pthread_condattr_init (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    pthread_condattr_init, pthread_condattr_destroy - initialize or destroy condition variable attributes object
     
    

    SYNOPSIS

    cc -mt [ flag... ] file... -lpthread [ library... ]
    #include <pthread.h>
    
    int pthread_condattr_init(pthread_condattr_t *attr);
    

    int pthread_condattr_destroy(pthread_condattr_t *attr);
    

     

    DESCRIPTION

    The pthread_condattr_init() function initializes a condition variable attributes object attr with the default value for all of the attributes defined by the implementation.

    At present, the only attribute available is the scope of condition variables. The default scope of the attribute is PTHREAD_PROCESS_PRIVATE.

    Attempts to initialize previously initialized condition variable attributes object will leave the storage allocated by the previous initialization unallocated.

    After a condition variable attributes object has been used to initialize one or more condition variables, any function affecting the attributes object (including destruction) does not affect any previously initialized condition variables.

    The pthread_condattr_destroy() function destroys a condition variable attributes object; the object becomes, in effect, uninitialized. An implementation may cause pthread_condattr_destroy() to set the object referenced by attr to an invalid value. A destroyed condition variable attributes object can be re-initialized using pthread_condattr_init(); the results of otherwise referencing the object after it has been destroyed are undefined.

    Additional attributes, their default values, and the names of the associated functions to get and set those attribute values are implementation-dependent.  

    RETURN VALUES

    If successful, the pthread_condattr_init() and pthread_condattr_destroy() functions return 0. Otherwise, an error number is returned to indicate the error.  

    ERRORS

    The pthread_condattr_init() function will fail if:

    ENOMEM

    Insufficient memory exists to initialize the condition variable attributes object.

    The pthread_condattr_destroy() function may fail if:

    EINVAL

    The value specified by attr is invalid.

     

    ATTRIBUTES

    See attributes(5) for descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Interface StabilityStandard

    MT-Level

     

    SEE ALSO

    pthread_condattr_getpshared(3C), pthread_condattr_setpshared(3C), pthread_cond_init(3C), pthread_create(3C), pthread_mutex_init(3C), attributes(5), standards(5)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    ATTRIBUTES
    SEE ALSO


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