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free (3)
  • free (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
  • free (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • free (3) ( FreeBSD man: Библиотечные вызовы )
  • free (3) ( Русские man: Библиотечные вызовы )
  • free (3) ( Linux man: Библиотечные вызовы )
  • >> free (3) ( POSIX man: Библиотечные вызовы )
  • free (9) ( FreeBSD man: Ядро )
  • Ключ free обнаружен в базе ключевых слов.
  •  

    NAME

    free - free allocated memory
     
    

    SYNOPSIS

    #include <stdlib.h>

    void free(void *ptr);
     

    DESCRIPTION

    The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.

    The free() function shall cause the space pointed to by ptr to be deallocated; that is, made available for further allocation. If ptr is a null pointer, no action shall occur. Otherwise, if the argument does not match a pointer earlier returned by the calloc(), malloc(), posix_memalign(), realloc(), or <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> strdup() function, or if the space has been deallocated by a call to free() or realloc(), the behavior is undefined.

    Any use of a pointer that refers to freed space results in undefined behavior.  

    RETURN VALUE

    The free() function shall not return a value.  

    ERRORS

    No errors are defined.

    The following sections are informative.  

    EXAMPLES

    None.  

    APPLICATION USAGE

    There is now no requirement for the implementation to support the inclusion of <malloc.h>.  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    calloc() , malloc() , realloc() , the Base Definitions volume of IEEE Std 1003.1-2001, <stdlib.h>  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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