code.delx.au - pulseaudio/blob - src/pulse/mainloop-signal.h

   1 #ifndef foomainloopsignalhfoo
   2 #define foomainloopsignalhfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2008 Lennart Poettering
   8   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   9
  10   PulseAudio is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU Lesser General Public License as published
  12   by the Free Software Foundation; either version 2 of the License,
  13   or (at your option) any later version.
  14
  15   PulseAudio is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with PulseAudio; if not, write to the Free Software
  22   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23   USA.
  24 ***/
  25
  26 #include <pulse/mainloop-api.h>
  27 #include <pulse/cdecl.h>
  28
  29 PA_C_DECL_BEGIN
  30
  31 /** \file
  32  * UNIX signal support for main loops. In contrast to other
  33  * main loop event sources such as timer and IO events, UNIX signal
  34  * support requires modification of the global process
  35  * environment. Due to this the generic main loop abstraction layer as
  36  * defined in \ref mainloop-api.h doesn't have direct support for UNIX
  37  * signals. However, you may hook signal support into an abstract main loop via the routines defined herein.
  38  */
  39
  40 /** An opaque UNIX signal event source object */
  41 typedef struct pa_signal_event pa_signal_event;
  42
  43 /** Callback prototype for signal events */
  44 typedef void (*pa_signal_cb_t) (pa_mainloop_api *api, pa_signal_event*e, int sig, void *userdata);
  45
  46 /** Destroy callback prototype for signal events */
  47 typedef void (*pa_signal_destroy_cb_t) (pa_mainloop_api *api, pa_signal_event*e, void *userdata);
  48
  49 /** Initialize the UNIX signal subsystem and bind it to the specified main loop */
  50 int pa_signal_init(pa_mainloop_api *api);
  51
  52 /** Cleanup the signal subsystem */
  53 void pa_signal_done(void);
  54
  55 /** Create a new UNIX signal event source object */
  56 pa_signal_event* pa_signal_new(int sig, pa_signal_cb_t callback, void *userdata);
  57
  58 /** Free a UNIX signal event source object */
  59 void pa_signal_free(pa_signal_event *e);
  60
  61 /** Set a function that is called when the signal event source is destroyed. Use this to free the userdata argument if required */
  62 void pa_signal_set_destroy(pa_signal_event *e, pa_signal_destroy_cb_t callback);
  63
  64 PA_C_DECL_END
  65
  66 #endif