| <!-- |
| **************************************************************************** |
| * Copyright 2019-2023,2024 Thomas E. Dickey * |
| * Copyright 2008-2010,2017 Free Software Foundation, Inc. * |
| * * |
| * Permission is hereby granted, free of charge, to any person obtaining a * |
| * copy of this software and associated documentation files (the * |
| * "Software"), to deal in the Software without restriction, including * |
| * without limitation the rights to use, copy, modify, merge, publish, * |
| * distribute, distribute with modifications, sublicense, and/or sell * |
| * copies of the Software, and to permit persons to whom the Software is * |
| * furnished to do so, subject to the following conditions: * |
| * * |
| * The above copyright notice and this permission notice shall be included * |
| * in all copies or substantial portions of the Software. * |
| * * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * |
| * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * |
| * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * |
| * * |
| * Except as contained in this notice, the name(s) of the above copyright * |
| * holders shall not be used in advertising or otherwise to promote the * |
| * sale, use or other dealings in this Software without prior written * |
| * authorization. * |
| **************************************************************************** |
| * @Id: curs_memleaks.3x,v 1.35 2024/03/16 15:35:01 tom Exp @ |
| --> |
| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"> |
| <HTML> |
| <HEAD> |
| <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> |
| <meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts"> |
| <TITLE>curs_memleaks 3x 2024-03-16 ncurses 6.5 Library calls</TITLE> |
| <link rel="author" href="mailto:bug-ncurses@gnu.org"> |
| |
| </HEAD> |
| <BODY> |
| <H1 class="no-header">curs_memleaks 3x 2024-03-16 ncurses 6.5 Library calls</H1> |
| <PRE> |
| <STRONG><A HREF="curs_memleaks.3x.html">curs_memleaks(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_memleaks.3x.html">curs_memleaks(3x)</A></STRONG> |
| |
| |
| |
| |
| </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE> |
| <STRONG>exit_curses</STRONG>, <STRONG>exit_terminfo</STRONG> - check for memory leaks in <EM>curses</EM> |
| |
| |
| </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> |
| <STRONG>void</STRONG> <STRONG>exit_curses(int</STRONG> <EM>code</EM><STRONG>);</STRONG> |
| |
| <STRONG>#include</STRONG> <STRONG><term.h></STRONG> |
| <STRONG>void</STRONG> <STRONG>exit_terminfo(int</STRONG> <EM>code</EM><STRONG>);</STRONG> |
| |
| <EM>/*</EM> <EM>deprecated</EM> <EM>(intentionally</EM> <EM>not</EM> <EM>declared</EM> <EM>in</EM> <EM>curses.h</EM> <EM>or</EM> <EM>term.h)</EM> <EM>*/</EM> |
| <STRONG>void</STRONG> <STRONG>_nc_freeall(void);</STRONG> |
| <STRONG>void</STRONG> <STRONG>_nc_free_and_exit(int</STRONG> <EM>code</EM><STRONG>);</STRONG> |
| <STRONG>void</STRONG> <STRONG>_nc_free_tinfo(int</STRONG> <EM>code</EM><STRONG>);</STRONG> |
| |
| |
| </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE> |
| These functions are used to simplify analysis of memory leaks in the |
| <EM>ncurses</EM> library. |
| |
| Any implementation of curses must not free the memory associated with a |
| screen, since (even after calling <STRONG><A HREF="curs_initscr.3x.html">endwin(3x)</A></STRONG>), it must be available for |
| use in the next call to <STRONG><A HREF="curs_refresh.3x.html">refresh(3x)</A></STRONG>. There are also chunks of memory |
| held for performance reasons. That makes it hard to analyze curses |
| applications for memory leaks. When using the specially configured |
| debugging version of the <EM>ncurses</EM> library, applications can call |
| functions which free those chunks of memory, simplifying the process of |
| memory-leak checking. |
| |
| Some of the functions are named with a "_nc_" prefix because they are |
| not intended for use in the non-debugging library: |
| |
| <STRONG>_nc_freeall</STRONG> |
| This frees (almost) all of the memory allocated by <EM>ncurses</EM>. |
| |
| <STRONG>_nc_free_and_exit</STRONG> |
| This frees the memory allocated by <EM>ncurses</EM> (like <STRONG>_nc_freeall</STRONG>), and |
| exits the program. It is preferred over <STRONG>_nc_freeall</STRONG> since some of |
| that memory may be required to keep the application running. |
| Simply exiting (with the given exit-code) is safer. |
| |
| <STRONG>_nc_free_tinfo</STRONG> |
| Use this function if only the low-level terminfo functions (and |
| corresponding library) are used. Like <STRONG>_nc_free_and_exit</STRONG>, it exits |
| the program after freeing memory. |
| |
| The functions prefixed "_nc" are normally not available; they must be |
| configured into the library at build time using the <STRONG>--disable-leaks</STRONG> |
| option. That compiles-in code that frees memory that normally would |
| not be freed. |
| |
| The <STRONG>exit_curses</STRONG> and <STRONG>exit_terminfo</STRONG> functions call <STRONG>_nc_free_and_exit</STRONG> and |
| <STRONG>_nc_free_tinfo</STRONG> if the library is configured to support memory-leak |
| checking. If the library is not configured to support memory-leak |
| checking, they simply call <STRONG>exit</STRONG>. |
| |
| |
| </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE> |
| These functions do not return a value. |
| |
| |
| </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE> |
| These functions are not part of X/Open Curses; nor do other |
| implementations of curses provide a similar feature. |
| |
| In any implementation of X/Open Curses, an application can free part of |
| the memory allocated by curses: |
| |
| <STRONG>o</STRONG> The portable part of <STRONG>exit_curses</STRONG> can be freed using <STRONG>delscreen</STRONG>, |
| passing the <EM>SCREEN</EM> pointer returned by <STRONG>newterm</STRONG>. |
| |
| In some implementations, there is a global variable <STRONG>sp</STRONG> which could |
| be used, e.g., if the screen were only initialized using <STRONG>initscr</STRONG>. |
| |
| <STRONG>o</STRONG> The portable part of <STRONG>exit_terminfo</STRONG> can be freed using <STRONG>del_curterm</STRONG>. |
| |
| In this case, there is a global variable <STRONG>cur_term</STRONG> which can be used |
| as parameter. |
| |
| |
| </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE> |
| <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG> |
| |
| |
| |
| ncurses 6.5 2024-03-16 <STRONG><A HREF="curs_memleaks.3x.html">curs_memleaks(3x)</A></STRONG> |
| </PRE> |
| <div class="nav"> |
| <ul> |
| <li><a href="#h2-NAME">NAME</a></li> |
| <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li> |
| <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li> |
| <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li> |
| <li><a href="#h2-PORTABILITY">PORTABILITY</a></li> |
| <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li> |
| </ul> |
| </div> |
| </BODY> |
| </HTML> |