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

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