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-<H1 class="no-header">curs_memleaks 3X</H1>
+<H1 class="no-header">curs_memleaks 3x 2024-03-16 ncurses 6.5 Library calls</H1>
<PRE>
-<B><A HREF="curs_memleaks.3X.html">curs_memleaks(3X)</A></B> <B><A HREF="curs_memleaks.3X.html">curs_memleaks(3X)</A></B>
+<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>
- <B>exit_curses</B>, <B>exit_terminfo</B> - <B>curses</B> memory-leak checking
+ <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>
- <B>#include</B> <B><curses.h></B>
- <B>void</B> <B>exit_curses(int</B> <I>code</I><B>);</B>
+ <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
+ <STRONG>void</STRONG> <STRONG>exit_curses(int</STRONG> <EM>code</EM><STRONG>);</STRONG>
- <B>#include</B> <B><term.h></B>
- <B>void</B> <B>exit_terminfo(int</B> <I>code</I><B>);</B>
+ <STRONG>#include</STRONG> <STRONG><term.h></STRONG>
+ <STRONG>void</STRONG> <STRONG>exit_terminfo(int</STRONG> <EM>code</EM><STRONG>);</STRONG>
- /* deprecated (intentionally not declared in curses.h or term.h) */
- <B>void</B> <B>_nc_freeall(void);</B>
- <B>void</B> <B>_nc_free_and_exit(int</B> <I>code</I><B>);</B>
- <B>void</B> <B>_nc_free_tinfo(int</B> <I>code</I><B>);</B>
+ <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
- ncurses library.
+ <EM>ncurses</EM> library.
Any implementation of curses must not free the memory associated with a
- screen, since (even after calling <B><A HREF="curs_initscr.3X.html">endwin(3X)</A></B>), it must be available for
- use in the next call to <B><A HREF="curs_refresh.3X.html">refresh(3X)</A></B>. There are also chunks of memory
- held for performance reasons. That makes it hard to analyze curses ap-
- plications for memory leaks. When using the specially configured de-
- bugging version of the ncurses library, applications can call functions
- which free those chunks of memory, simplifying the process of memory-
- leak checking.
+ 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:
- <B>_nc_freeall</B>
- This frees (almost) all of the memory allocated by ncurses.
+ <STRONG>_nc_freeall</STRONG>
+ This frees (almost) all of the memory allocated by <EM>ncurses</EM>.
- <B>_nc_free_and_exit</B>
- This frees the memory allocated by ncurses (like <B>_nc_freeall</B>), and
- exits the program. It is preferred over <B>_nc_freeall</B> since some of
- that memory may be required to keep the application running. Sim-
- ply exiting (with the given exit-code) is safer.
+ <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.
- <B>_nc_free_tinfo</B>
+ <STRONG>_nc_free_tinfo</STRONG>
Use this function if only the low-level terminfo functions (and
- corresponding library) are used. Like <B>_nc_free_and_exit</B>, it exits
+ 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 <B>--disable-leaks</B> op-
- tion. That compiles-in code that frees memory that normally would not
- be freed.
+ 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 <B>exit_curses</B> and <B>exit_terminfo</B> functions call <B>_nc_free_and_exit</B> and
- <B>_nc_free_tinfo</B> if the library is configured to support memory-leak
+ 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 <B>exit</B>.
+ checking, they simply call <STRONG>exit</STRONG>.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- These functions are not part of X/Open Curses; nor do other implementa-
- tions of curses provide a similar feature.
+ 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>
- <B><A HREF="curses.3X.html">curses(3X)</A></B>.
+ <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>
- <B><A HREF="curs_memleaks.3X.html">curs_memleaks(3X)</A></B>
+ncurses 6.5 2024-03-16 <STRONG><A HREF="curs_memleaks.3x.html">curs_memleaks(3x)</A></STRONG>
</PRE>
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