doc/html/man/curs_threads.3x.html

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  44 <H1 class="no-header">curs_threads 3x</H1>
  45 <PRE>
  46 <STRONG><A HREF="curs_threads.3x.html">curs_threads(3x)</A></STRONG>                                              <STRONG><A HREF="curs_threads.3x.html">curs_threads(3x)</A></STRONG>
  47
  48
  49
  50
  51 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
  52        <STRONG>curs_threads</STRONG> - <STRONG>curses</STRONG> thread support
  53
  54
  55 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  56        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  57
  58        <STRONG>typedef</STRONG> <STRONG>int</STRONG> <STRONG>(*NCURSES_WINDOW_CB)(WINDOW</STRONG> <STRONG>*,</STRONG> <STRONG>void</STRONG> <STRONG>*);</STRONG>
  59        <STRONG>typedef</STRONG> <STRONG>int</STRONG> <STRONG>(*NCURSES_SCREEN_CB)(SCREEN</STRONG> <STRONG>*,</STRONG> <STRONG>void</STRONG> <STRONG>*);</STRONG>
  60        <STRONG>int</STRONG> <STRONG>get_escdelay(void);</STRONG>
  61        <STRONG>int</STRONG> <STRONG>set_escdelay(int</STRONG> <STRONG>size);</STRONG>
  62        <STRONG>int</STRONG> <STRONG>set_tabsize(int</STRONG> <STRONG>size);</STRONG>
  63        <STRONG>int</STRONG> <STRONG>use_screen(SCREEN</STRONG> <STRONG>*scr,</STRONG> <STRONG>NCURSES_SCREEN_CB</STRONG> <STRONG>func,</STRONG> <STRONG>void</STRONG> <STRONG>*data);</STRONG>
  64        <STRONG>int</STRONG> <STRONG>use_window(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>NCURSES_WINDOW_CB</STRONG> <STRONG>func,</STRONG> <STRONG>void</STRONG> <STRONG>*data);</STRONG>
  65
  66
  67 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  68        This  implementation  can  be configured to provide rudimentary support
  69        for multi-threaded applications.  This makes a  different  set  of  li-
  70        braries, e.g., <EM>libncursest</EM> since the binary interfaces are different.
  71
  72        Rather  than  modify  the interfaces to pass a thread specifier to each
  73        function, it adds a few functions which can be used in  any  configura-
  74        tion  which  hide  the  mutex's needed to prevent concurrent use of the
  75        global variables when configured for threading.
  76
  77        In addition to forcing access to members of the <STRONG>WINDOW</STRONG> structure to  be
  78        via  functions  (see <STRONG><A HREF="curs_opaque.3x.html">curs_opaque(3x)</A></STRONG>), it makes functions of the common
  79        global variables, e.g., COLORS,  COLOR_PAIRS,  COLS,  ESCDELAY,  LINES,
  80        TABSIZE  curscr, newscr and ttytype.  Those variables are maintained as
  81        read-only values, stored in the <STRONG>SCREEN</STRONG> structure.
  82
  83        Even this is not enough to make a thread-safe application using curses.
  84        A multi-threaded application would be expected to have threads updating
  85        separate windows (within the same  device),  or  updating  on  separate
  86        screens  (on  different  devices).  Also, a few of the global variables
  87        are considered writable by some applications.  The functions  described
  88        here address these special situations.
  89
  90        The ESCDELAY and TABSIZE global variables are modified by some applica-
  91        tions.  To modify them in any configuration, use  the  <STRONG>set_escdelay</STRONG>  or
  92        <STRONG>set_tabsize</STRONG> functions.  Other global variables are not modifiable.
  93
  94        The <STRONG>get_escdelay</STRONG> function returns the value for ESCDELAY.
  95
  96        The  <STRONG>use_window</STRONG> and <STRONG>use_screen</STRONG> functions provide coarse granularity mu-
  97        texes for their respective <STRONG>WINDOW</STRONG> and <STRONG>SCREEN</STRONG> parameters, and call a us-
  98        er-supplied  function,  passing  it a <EM>data</EM> parameter, and returning the
  99        value from the user-supplied function to the application.
 100
 101
 102 </PRE><H3><a name="h3-USAGE">USAGE</a></H3><PRE>
 103        All of the ncurses library functions assume that the locale is not  al-
 104        tered during operation.  In addition, they use data which is maintained
 105        within a hierarchy of scopes.
 106
 107           <STRONG>o</STRONG>   global data, e.g., used in the low-level terminfo or termcap in-
 108               terfaces.
 109
 110           <STRONG>o</STRONG>   terminal data, e.g., associated with a call to <EM>set</EM><STRONG>_</STRONG><EM>curterm</EM>.  The
 111               terminal data are initialized when screens are created.
 112
 113           <STRONG>o</STRONG>   screen data, e.g., associated with a call to <EM>newterm</EM> or <EM>initscr</EM>.
 114
 115           <STRONG>o</STRONG>   window data, e.g., associated with a call to <EM>newwin</EM>  or  <EM>subwin</EM>.
 116               Windows  are  associated with screens.  Pads are not necessarily
 117               associated with a particular screen.
 118
 119               Most curses applications operate on one or more windows within a
 120               single screen.
 121
 122           <STRONG>o</STRONG>   reentrant, i.e., it uses only the data passed as parameters.
 123
 124        This  table lists the scope of data used for each symbol in the ncurses
 125        library when it is configured to support threading:
 126
 127             Symbol                  Scope
 128             -------------------------------------------------------------
 129             BC                      global
 130             COLORS                  screen (readonly)
 131             COLOR_PAIR              reentrant
 132             COLOR_PAIRS             screen (readonly)
 133             COLS                    screen (readonly)
 134             ESCDELAY                screen (readonly, see <EM>set</EM><STRONG>_</STRONG><EM>escdelay</EM>)
 135             LINES                   screen (readonly)
 136             PAIR_NUMBER             reentrant
 137             PC                      global
 138             SP                      global
 139             TABSIZE                 screen (readonly)
 140             UP                      global
 141             acs_map                 screen (readonly)
 142             add_wch                 window (stdscr)
 143             add_wchnstr             window (stdscr)
 144             add_wchstr              window (stdscr)
 145             addch                   window (stdscr)
 146             addchnstr               window (stdscr)
 147             addchstr                window (stdscr)
 148             addnstr                 window (stdscr)
 149             addnwstr                window (stdscr)
 150             addstr                  window (stdscr)
 151             addwstr                 window (stdscr)
 152             assume_default_colors   screen
 153             attr_get                window (stdscr)
 154             attr_off                window (stdscr)
 155             attr_on                 window (stdscr)
 156             attr_set                window (stdscr)
 157             attroff                 window (stdscr)
 158             attron                  window (stdscr)
 159             attrset                 window (stdscr)
 160             baudrate                screen
 161             beep                    screen
 162             bkgd                    window (stdscr)
 163             bkgdset                 window (stdscr)
 164             bkgrnd                  window (stdscr)
 165             bkgrndset               window (stdscr)
 166             boolcodes               global (readonly)
 167             boolfnames              global (readonly)
 168             boolnames               global (readonly)
 169             border                  window (stdscr)
 170             border_set              window (stdscr)
 171             box                     window (stdscr)
 172             box_set                 window (stdscr)
 173             can_change_color        terminal
 174             cbreak                  screen
 175             chgat                   window (stdscr)
 176             clear                   window (stdscr)
 177             clearok                 window
 178             clrtobot                window (stdscr)
 179             clrtoeol                window (stdscr)
 180             color_content           screen
 181             color_set               window (stdscr)
 182             copywin                 window locks(source, target)
 183
 184             cur_term                terminal
 185             curs_set                screen
 186             curscr                  screen (readonly)
 187             curses_version          global (readonly)
 188             def_prog_mode           terminal
 189             def_shell_mode          terminal
 190             define_key              screen
 191             del_curterm             screen
 192             delay_output            screen
 193             delch                   window (stdscr)
 194             deleteln                window (stdscr)
 195             delscreen               global locks(screenlist, screen)
 196             delwin                  global locks(windowlist)
 197             derwin                  screen
 198             doupdate                screen
 199             dupwin                  screen locks(window)
 200             echo                    screen
 201             echo_wchar              window (stdscr)
 202             echochar                window (stdscr)
 203             endwin                  screen
 204             erase                   window (stdscr)
 205             erasechar               window (stdscr)
 206             erasewchar              window (stdscr)
 207             filter                  global
 208             flash                   terminal
 209             flushinp                screen
 210             get_wch                 screen (input-operation)
 211             get_wstr                screen (input-operation)
 212             getattrs                window
 213             getbegx                 window
 214             getbegy                 window
 215             getbkgd                 window
 216             getbkgrnd               window
 217             getcchar                reentrant
 218             getch                   screen (input-operation)
 219             getcurx                 window
 220             getcury                 window
 221             getmaxx                 window
 222             getmaxy                 window
 223             getmouse                screen (input-operation)
 224             getn_wstr               screen (input-operation)
 225             getnstr                 screen (input-operation)
 226             getparx                 window
 227             getpary                 window
 228             getstr                  screen (input-operation)
 229             getwin                  screen (input-operation)
 230             halfdelay               screen
 231             has_colors              terminal
 232             has_ic                  terminal
 233             has_il                  terminal
 234             has_key                 screen
 235             hline                   window (stdscr)
 236             hline_set               window (stdscr)
 237             idcok                   window
 238             idlok                   window
 239             immedok                 window
 240             in_wch                  window (stdscr)
 241             in_wchnstr              window (stdscr)
 242             in_wchstr               window (stdscr)
 243             inch                    window (stdscr)
 244             inchnstr                window (stdscr)
 245             inchstr                 window (stdscr)
 246             init_color              screen
 247             init_pair               screen
 248             initscr                 global locks(screenlist)
 249             innstr                  window (stdscr)
 250
 251             innwstr                 window (stdscr)
 252             ins_nwstr               window (stdscr)
 253             ins_wch                 window (stdscr)
 254             ins_wstr                window (stdscr)
 255             insch                   window (stdscr)
 256             insdelln                window (stdscr)
 257             insertln                window (stdscr)
 258             insnstr                 window (stdscr)
 259             insstr                  window (stdscr)
 260             instr                   window (stdscr)
 261             intrflush               terminal
 262             inwstr                  window (stdscr)
 263             is_cleared              window
 264             is_idcok                window
 265             is_idlok                window
 266             is_immedok              window
 267             is_keypad               window
 268             is_leaveok              window
 269             is_linetouched          window
 270             is_nodelay              window
 271             is_notimeout            window
 272             is_scrollok             window
 273             is_syncok               window
 274             is_term_resized         terminal
 275             is_wintouched           window
 276             isendwin                screen
 277             key_defined             screen
 278             key_name                global (static data)
 279             keybound                screen
 280             keyname                 global (static data)
 281             keyok                   screen
 282             keypad                  window
 283             killchar                terminal
 284             killwchar               terminal
 285             leaveok                 window
 286             longname                screen
 287             mcprint                 terminal
 288             meta                    screen
 289             mouse_trafo             window (stdscr)
 290             mouseinterval           screen
 291             mousemask               screen
 292             move                    window (stdscr)
 293             mvadd_wch               window (stdscr)
 294             mvadd_wchnstr           window (stdscr)
 295             mvadd_wchstr            window (stdscr)
 296             mvaddch                 window (stdscr)
 297             mvaddchnstr             window (stdscr)
 298             mvaddchstr              window (stdscr)
 299             mvaddnstr               window (stdscr)
 300             mvaddnwstr              window (stdscr)
 301             mvaddstr                window (stdscr)
 302             mvaddwstr               window (stdscr)
 303             mvchgat                 window (stdscr)
 304             mvcur                   screen
 305             mvdelch                 window (stdscr)
 306             mvderwin                window (stdscr)
 307             mvget_wch               screen (input-operation)
 308             mvget_wstr              screen (input-operation)
 309             mvgetch                 screen (input-operation)
 310             mvgetn_wstr             screen (input-operation)
 311             mvgetnstr               screen (input-operation)
 312             mvgetstr                screen (input-operation)
 313             mvhline                 window (stdscr)
 314             mvhline_set             window (stdscr)
 315             mvin_wch                window (stdscr)
 316             mvin_wchnstr            window (stdscr)
 317
 318             mvin_wchstr             window (stdscr)
 319             mvinch                  window (stdscr)
 320             mvinchnstr              window (stdscr)
 321             mvinchstr               window (stdscr)
 322             mvinnstr                window (stdscr)
 323             mvinnwstr               window (stdscr)
 324             mvins_nwstr             window (stdscr)
 325             mvins_wch               window (stdscr)
 326             mvins_wstr              window (stdscr)
 327             mvinsch                 window (stdscr)
 328             mvinsnstr               window (stdscr)
 329             mvinsstr                window (stdscr)
 330             mvinstr                 window (stdscr)
 331             mvinwstr                window (stdscr)
 332             mvprintw                window (stdscr)
 333             mvscanw                 screen
 334             mvvline                 window (stdscr)
 335             mvvline_set             window (stdscr)
 336             mvwadd_wch              window
 337             mvwadd_wchnstr          window
 338             mvwadd_wchstr           window
 339             mvwaddch                window
 340             mvwaddchnstr            window
 341             mvwaddchstr             window
 342             mvwaddnstr              window
 343             mvwaddnwstr             window
 344             mvwaddstr               window
 345             mvwaddwstr              window
 346             mvwchgat                window
 347             mvwdelch                window
 348             mvwget_wch              screen (input-operation)
 349             mvwget_wstr             screen (input-operation)
 350             mvwgetch                screen (input-operation)
 351             mvwgetn_wstr            screen (input-operation)
 352             mvwgetnstr              screen (input-operation)
 353             mvwgetstr               screen (input-operation)
 354             mvwhline                window
 355             mvwhline_set            window
 356             mvwin                   window
 357             mvwin_wch               window
 358             mvwin_wchnstr           window
 359             mvwin_wchstr            window
 360             mvwinch                 window
 361             mvwinchnstr             window
 362             mvwinchstr              window
 363             mvwinnstr               window
 364             mvwinnwstr              window
 365             mvwins_nwstr            window
 366             mvwins_wch              window
 367             mvwins_wstr             window
 368             mvwinsch                window
 369             mvwinsnstr              window
 370             mvwinsstr               window
 371             mvwinstr                window
 372             mvwinwstr               window
 373             mvwprintw               window
 374             mvwscanw                screen
 375             mvwvline                window
 376             mvwvline_set            window
 377             napms                   reentrant
 378             newpad                  global locks(windowlist)
 379             newscr                  screen (readonly)
 380             newterm                 global locks(screenlist)
 381             newwin                  global locks(windowlist)
 382             nl                      screen
 383             nocbreak                screen
 384
 385             nodelay                 window
 386             noecho                  screen
 387             nofilter                global
 388             nonl                    screen
 389             noqiflush               terminal
 390             noraw                   screen
 391             notimeout               window
 392             numcodes                global (readonly)
 393             numfnames               global (readonly)
 394             numnames                global (readonly)
 395             ospeed                  global
 396             overlay                 window locks(source, target)
 397             overwrite               window locks(source, target)
 398             pair_content            screen
 399             pecho_wchar             screen
 400             pechochar               screen
 401             pnoutrefresh            screen
 402             prefresh                screen
 403             printw                  window
 404             putp                    global
 405             putwin                  window
 406             qiflush                 terminal
 407             raw                     screen
 408             redrawwin               window
 409             refresh                 screen
 410             reset_prog_mode         screen
 411             reset_shell_mode        screen
 412             resetty                 terminal
 413             resize_term             screen locks(windowlist)
 414             resizeterm              screen
 415             restartterm             screen
 416             ripoffline              global (static data)
 417             savetty                 terminal
 418             scanw                   screen
 419             scr_dump                screen
 420             scr_init                screen
 421             scr_restore             screen
 422             scr_set                 screen
 423             scrl                    window (stdscr)
 424             scroll                  window
 425             scrollok                window
 426             set_curterm             screen
 427             set_escdelay            screen
 428             set_tabsize             screen
 429             set_term                global locks(screenlist, screen)
 430             setcchar                reentrant
 431             setscrreg               window (stdscr)
 432             setupterm               global
 433             slk_attr                screen
 434             slk_attr_off            screen
 435             slk_attr_on             screen
 436             slk_attr_set            screen
 437             slk_attroff             screen
 438             slk_attron              screen
 439             slk_attrset             screen
 440             slk_clear               screen
 441             slk_color               screen
 442             slk_init                screen
 443             slk_label               screen
 444             slk_noutrefresh         screen
 445             slk_refresh             screen
 446             slk_restore             screen
 447             slk_set                 screen
 448             slk_touch               screen
 449             slk_wset                screen
 450             standend                window
 451
 452             standout                window
 453             start_color             screen
 454             stdscr                  screen (readonly)
 455             strcodes                global (readonly)
 456             strfnames               global (readonly)
 457             strnames                global (readonly)
 458             subpad                  window
 459             subwin                  window
 460             syncok                  window
 461             term_attrs              screen
 462             termattrs               screen
 463             termname                terminal
 464             tgetent                 global
 465             tgetflag                global
 466             tgetnum                 global
 467             tgetstr                 global
 468             tgoto                   global
 469             tigetflag               terminal
 470             tigetnum                terminal
 471             tigetstr                terminal
 472             timeout                 window (stdscr)
 473             touchline               window
 474             touchwin                window
 475             tparm                   global (static data)
 476             tputs                   screen
 477             trace                   global (static data)
 478             ttytype                 screen (readonly)
 479             typeahead               screen
 480             unctrl                  screen
 481             unget_wch               screen (input-operation)
 482             ungetch                 screen (input-operation)
 483             ungetmouse              screen (input-operation)
 484             untouchwin              window
 485             use_default_colors      screen
 486             use_env                 global (static data)
 487             use_extended_names      global (static data)
 488             use_legacy_coding       screen
 489             use_screen              global locks(screenlist, screen)
 490             use_window              global locks(windowlist, window)
 491             vid_attr                screen
 492             vid_puts                screen
 493             vidattr                 screen
 494             vidputs                 screen
 495             vline                   window (stdscr)
 496             vline_set               window (stdscr)
 497             vw_printw               window
 498             vw_scanw                screen
 499             vwprintw                window
 500             vwscanw                 screen
 501             wadd_wch                window
 502             wadd_wchnstr            window
 503             wadd_wchstr             window
 504             waddch                  window
 505             waddchnstr              window
 506             waddchstr               window
 507             waddnstr                window
 508             waddnwstr               window
 509             waddstr                 window
 510             waddwstr                window
 511             wattr_get               window
 512             wattr_off               window
 513             wattr_on                window
 514             wattr_set               window
 515             wattroff                window
 516             wattron                 window
 517             wattrset                window
 518
 519             wbkgd                   window
 520             wbkgdset                window
 521             wbkgrnd                 window
 522             wbkgrndset              window
 523             wborder                 window
 524             wborder_set             window
 525             wchgat                  window
 526             wclear                  window
 527             wclrtobot               window
 528             wclrtoeol               window
 529             wcolor_set              window
 530             wcursyncup              screen (affects window plus parents)
 531             wdelch                  window
 532             wdeleteln               window
 533             wecho_wchar             window
 534             wechochar               window
 535             wenclose                window
 536             werase                  window
 537             wget_wch                screen (input-operation)
 538             wget_wstr               screen (input-operation)
 539             wgetbkgrnd              window
 540             wgetch                  screen (input-operation)
 541             wgetdelay               window
 542             wgetn_wstr              screen (input-operation)
 543             wgetnstr                screen (input-operation)
 544             wgetparent              window
 545             wgetscrreg              window
 546             wgetstr                 screen (input-operation)
 547             whline                  window
 548             whline_set              window
 549             win_wch                 window
 550             win_wchnstr             window
 551             win_wchstr              window
 552             winch                   window
 553             winchnstr               window
 554             winchstr                window
 555             winnstr                 window
 556             winnwstr                window
 557             wins_nwstr              window
 558             wins_wch                window
 559             wins_wstr               window
 560             winsch                  window
 561             winsdelln               window
 562             winsertln               window
 563             winsnstr                window
 564             winsstr                 window
 565             winstr                  window
 566             winwstr                 window
 567             wmouse_trafo            window
 568             wmove                   window
 569             wnoutrefresh            screen
 570             wprintw                 window
 571             wredrawln               window
 572             wrefresh                screen
 573             wresize                 window locks(windowlist)
 574             wscanw                  screen
 575             wscrl                   window
 576             wsetscrreg              window
 577             wstandend               window
 578             wstandout               window
 579             wsyncdown               screen (affects window plus parents)
 580             wsyncup                 screen (affects window plus parents)
 581             wtimeout                window
 582             wtouchln                window
 583             wunctrl                 global (static data)
 584             wvline                  window
 585
 586             wvline_set              window
 587
 588
 589 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
 590        These functions all return <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>, except as noted.
 591
 592
 593 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 594        Both a macro and a function are provided for each name.
 595
 596
 597 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 598        These routines are specific to ncurses.  They  were  not  supported  on
 599        Version 7, BSD or System V implementations.  It is recommended that any
 600        code depending on ncurses extensions be conditioned using  NCURSES_VER-
 601        SION.
 602
 603
 604 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 605        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_opaque.3x.html">curs_opaque(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>.
 606
 607
 608
 609                                                               <STRONG><A HREF="curs_threads.3x.html">curs_threads(3x)</A></STRONG>
 610 </PRE>
 611 <div class="nav">
 612 <ul>
 613 <li><a href="#h2-NAME">NAME</a></li>
 614 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 615 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
 616 <ul>
 617 <li><a href="#h3-USAGE">USAGE</a></li>
 618 </ul>
 619 </li>
 620 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 621 <li><a href="#h2-NOTES">NOTES</a></li>
 622 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 623 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 624 </ul>
 625 </div>
 626 </BODY>
 627 </HTML>