glib/gmain.h

   1 /* gmain.h - the GLib Main loop
   2  * Copyright (C) 1998-2000 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
  21 #error "Only <glib.h> can be included directly."
  22 #endif
  23
  24 #ifndef __G_MAIN_H__
  25 #define __G_MAIN_H__
  26
  27 #include <glib/gpoll.h>
  28 #include <glib/gslist.h>
  29 #include <glib/gthread.h>
  30
  31 G_BEGIN_DECLS
  32
  33 typedef struct _GMainContext            GMainContext;   /* Opaque */
  34 typedef struct _GMainLoop               GMainLoop;      /* Opaque */
  35 typedef struct _GSource                 GSource;
  36 typedef struct _GSourceCallbackFuncs    GSourceCallbackFuncs;
  37 typedef struct _GSourceFuncs            GSourceFuncs;
  38
  39 typedef gboolean (*GSourceFunc)       (gpointer data);
  40 typedef void     (*GChildWatchFunc)   (GPid     pid,
  41                                        gint     status,
  42                                        gpointer data);
  43 struct _GSource
  44 {
  45   /*< private >*/
  46   gpointer callback_data;
  47   GSourceCallbackFuncs *callback_funcs;
  48
  49   GSourceFuncs *source_funcs;
  50   guint ref_count;
  51
  52   GMainContext *context;
  53
  54   gint priority;
  55   guint flags;
  56   guint source_id;
  57
  58   GSList *poll_fds;
  59
  60   GSource *prev;
  61   GSource *next;
  62
  63   gpointer reserved1;
  64   gpointer reserved2;
  65 };
  66
  67 struct _GSourceCallbackFuncs
  68 {
  69   void (*ref)   (gpointer     cb_data);
  70   void (*unref) (gpointer     cb_data);
  71   void (*get)   (gpointer     cb_data,
  72                  GSource     *source,
  73                  GSourceFunc *func,
  74                  gpointer    *data);
  75 };
  76
  77 typedef void (*GSourceDummyMarshal) (void);
  78
  79 struct _GSourceFuncs
  80 {
  81   gboolean (*prepare)  (GSource    *source,
  82                         gint       *timeout_);
  83   gboolean (*check)    (GSource    *source);
  84   gboolean (*dispatch) (GSource    *source,
  85                         GSourceFunc callback,
  86                         gpointer    user_data);
  87   void     (*finalize) (GSource    *source); /* Can be NULL */
  88
  89   /* For use by g_source_set_closure */
  90   GSourceFunc     closure_callback;
  91   GSourceDummyMarshal closure_marshal; /* Really is of type GClosureMarshal */
  92 };
  93
  94 /* Standard priorities */
  95
  96 #define G_PRIORITY_HIGH            -100
  97 #define G_PRIORITY_DEFAULT          0
  98 #define G_PRIORITY_HIGH_IDLE        100
  99 #define G_PRIORITY_DEFAULT_IDLE     200
 100 #define G_PRIORITY_LOW              300
 101
 102 /* GMainContext: */
 103
 104 GMainContext *g_main_context_new       (void);
 105 GMainContext *g_main_context_ref       (GMainContext *context);
 106 void          g_main_context_unref     (GMainContext *context);
 107 GMainContext *g_main_context_default   (void);
 108
 109 gboolean      g_main_context_iteration (GMainContext *context,
 110                                         gboolean      may_block);
 111 gboolean      g_main_context_pending   (GMainContext *context);
 112
 113 /* For implementation of legacy interfaces
 114  */
 115 GSource      *g_main_context_find_source_by_id              (GMainContext *context,
 116                                                              guint         source_id);
 117 GSource      *g_main_context_find_source_by_user_data       (GMainContext *context,
 118                                                              gpointer      user_data);
 119 GSource      *g_main_context_find_source_by_funcs_user_data (GMainContext *context,
 120                                                              GSourceFuncs *funcs,
 121                                                              gpointer      user_data);
 122
 123 /* Low level functions for implementing custom main loops.
 124  */
 125 void     g_main_context_wakeup  (GMainContext *context);
 126 gboolean g_main_context_acquire (GMainContext *context);
 127 void     g_main_context_release (GMainContext *context);
 128 gboolean g_main_context_is_owner (GMainContext *context);
 129 gboolean g_main_context_wait    (GMainContext *context,
 130                                  GCond        *cond,
 131                                  GMutex       *mutex);
 132
 133 gboolean g_main_context_prepare  (GMainContext *context,
 134                                   gint         *priority);
 135 gint     g_main_context_query    (GMainContext *context,
 136                                   gint          max_priority,
 137                                   gint         *timeout_,
 138                                   GPollFD      *fds,
 139                                   gint          n_fds);
 140 gint     g_main_context_check    (GMainContext *context,
 141                                   gint          max_priority,
 142                                   GPollFD      *fds,
 143                                   gint          n_fds);
 144 void     g_main_context_dispatch (GMainContext *context);
 145
 146 void     g_main_context_set_poll_func (GMainContext *context,
 147                                        GPollFunc     func);
 148 GPollFunc g_main_context_get_poll_func (GMainContext *context);
 149
 150 /* Low level functions for use by source implementations
 151  */
 152 void     g_main_context_add_poll    (GMainContext *context,
 153                                      GPollFD      *fd,
 154                                      gint          priority);
 155 void     g_main_context_remove_poll (GMainContext *context,
 156                                      GPollFD      *fd);
 157
 158 gint     g_main_depth               (void);
 159 GSource *g_main_current_source      (void);
 160
 161 /* GMainContexts for other threads
 162  */
 163 void          g_main_context_push_thread_default (GMainContext *context);
 164 void          g_main_context_pop_thread_default  (GMainContext *context);
 165 GMainContext *g_main_context_get_thread_default  (void);
 166
 167 /* GMainLoop: */
 168
 169 GMainLoop *g_main_loop_new        (GMainContext *context,
 170                                    gboolean      is_running);
 171 void       g_main_loop_run        (GMainLoop    *loop);
 172 void       g_main_loop_quit       (GMainLoop    *loop);
 173 GMainLoop *g_main_loop_ref        (GMainLoop    *loop);
 174 void       g_main_loop_unref      (GMainLoop    *loop);
 175 gboolean   g_main_loop_is_running (GMainLoop    *loop);
 176 GMainContext *g_main_loop_get_context (GMainLoop    *loop);
 177
 178 /* GSource: */
 179
 180 GSource *g_source_new             (GSourceFuncs   *source_funcs,
 181                                    guint           struct_size);
 182 GSource *g_source_ref             (GSource        *source);
 183 void     g_source_unref           (GSource        *source);
 184
 185 guint    g_source_attach          (GSource        *source,
 186                                    GMainContext   *context);
 187 void     g_source_destroy         (GSource        *source);
 188
 189 void     g_source_set_priority    (GSource        *source,
 190                                    gint            priority);
 191 gint     g_source_get_priority    (GSource        *source);
 192 void     g_source_set_can_recurse (GSource        *source,
 193                                    gboolean        can_recurse);
 194 gboolean g_source_get_can_recurse (GSource        *source);
 195 guint    g_source_get_id          (GSource        *source);
 196
 197 GMainContext *g_source_get_context (GSource       *source);
 198
 199 void     g_source_set_callback    (GSource        *source,
 200                                    GSourceFunc     func,
 201                                    gpointer        data,
 202                                    GDestroyNotify  notify);
 203
 204 void     g_source_set_funcs       (GSource        *source,
 205                                    GSourceFuncs   *funcs);
 206 gboolean g_source_is_destroyed    (GSource        *source);
 207
 208 /* Used to implement g_source_connect_closure and internally*/
 209 void g_source_set_callback_indirect (GSource              *source,
 210                                      gpointer              callback_data,
 211                                      GSourceCallbackFuncs *callback_funcs);
 212
 213 void     g_source_add_poll         (GSource        *source,
 214                                     GPollFD        *fd);
 215 void     g_source_remove_poll      (GSource        *source,
 216                                     GPollFD        *fd);
 217
 218 void     g_source_get_current_time (GSource        *source,
 219                                     GTimeVal       *timeval);
 220
 221  /* void g_source_connect_closure (GSource        *source,
 222                                   GClosure       *closure);
 223  */
 224
 225 /* Specific source types
 226  */
 227 GSource *g_idle_source_new        (void);
 228 GSource *g_child_watch_source_new (GPid pid);
 229 GSource *g_timeout_source_new     (guint interval);
 230 GSource *g_timeout_source_new_seconds (guint interval);
 231
 232 /* Miscellaneous functions
 233  */
 234 void g_get_current_time                 (GTimeVal       *result);
 235
 236 /* ============== Compat main loop stuff ================== */
 237
 238 #ifndef G_DISABLE_DEPRECATED
 239
 240 /* Legacy names for GMainLoop functions
 241  */
 242 #define         g_main_new(is_running)  g_main_loop_new (NULL, is_running);
 243 #define         g_main_run(loop)        g_main_loop_run(loop)
 244 #define         g_main_quit(loop)       g_main_loop_quit(loop)
 245 #define         g_main_destroy(loop)    g_main_loop_unref(loop)
 246 #define         g_main_is_running(loop) g_main_loop_is_running(loop)
 247
 248 /* Functions to manipulate the default main loop
 249  */
 250
 251 #define g_main_iteration(may_block) g_main_context_iteration      (NULL, may_block)
 252 #define g_main_pending()            g_main_context_pending        (NULL)
 253
 254 #define g_main_set_poll_func(func)   g_main_context_set_poll_func (NULL, func)
 255
 256 #endif /* G_DISABLE_DEPRECATED */
 257
 258 /* Source manipulation by ID */
 259 gboolean g_source_remove                     (guint          tag);
 260 gboolean g_source_remove_by_user_data        (gpointer       user_data);
 261 gboolean g_source_remove_by_funcs_user_data  (GSourceFuncs  *funcs,
 262                                               gpointer       user_data);
 263
 264 /* Idles, child watchers and timeouts */
 265 guint    g_timeout_add_full         (gint            priority,
 266                                      guint           interval,
 267                                      GSourceFunc     function,
 268                                      gpointer        data,
 269                                      GDestroyNotify  notify);
 270 guint    g_timeout_add              (guint           interval,
 271                                      GSourceFunc     function,
 272                                      gpointer        data);
 273 guint    g_timeout_add_seconds_full (gint            priority,
 274                                      guint           interval,
 275                                      GSourceFunc     function,
 276                                      gpointer        data,
 277                                      GDestroyNotify  notify);
 278 guint    g_timeout_add_seconds      (guint           interval,
 279                                      GSourceFunc     function,
 280                                      gpointer        data);
 281 guint    g_child_watch_add_full     (gint            priority,
 282                                      GPid            pid,
 283                                      GChildWatchFunc function,
 284                                      gpointer        data,
 285                                      GDestroyNotify  notify);
 286 guint    g_child_watch_add          (GPid            pid,
 287                                      GChildWatchFunc function,
 288                                      gpointer        data);
 289 guint    g_idle_add                 (GSourceFunc     function,
 290                                      gpointer        data);
 291 guint    g_idle_add_full            (gint            priority,
 292                                      GSourceFunc     function,
 293                                      gpointer        data,
 294                                      GDestroyNotify  notify);
 295 gboolean g_idle_remove_by_data      (gpointer        data);
 296
 297 /* Hook for GClosure / GSource integration. Don't touch */
 298 GLIB_VAR GSourceFuncs g_timeout_funcs;
 299 GLIB_VAR GSourceFuncs g_child_watch_funcs;
 300 GLIB_VAR GSourceFuncs g_idle_funcs;
 301
 302 G_END_DECLS
 303
 304 #endif /* __G_MAIN_H__ */