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#ifndef foomainloopapihfoo
#define foomainloopapihfoo
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/time.h>
#include <pulse/cdecl.h>
#include <pulse/version.h>
/** \file
*
* Main loop abstraction layer. Both the PulseAudio core and the
* PulseAudio client library use a main loop abstraction layer. Due to
* this it is possible to embed PulseAudio into other
* applications easily. Two main loop implementations are
* currently available:
* \li A minimal implementation based on the C library's poll() function (See \ref mainloop.h)
* \li A wrapper around the GLIB main loop. Use this to embed PulseAudio into your GLIB/GTK+/GNOME programs (See \ref glib-mainloop.h)
*
* The structure pa_mainloop_api is used as vtable for the main loop abstraction.
*
* This mainloop abstraction layer has no direct support for UNIX signals. Generic, mainloop implementation agnostic support is available through \ref mainloop-signal.h.
* */
PA_C_DECL_BEGIN
/** An abstract mainloop API vtable */
typedef struct pa_mainloop_api pa_mainloop_api;
/** A bitmask for IO events */
typedef enum pa_io_event_flags {
PA_IO_EVENT_NULL = 0, /**< No event */
PA_IO_EVENT_INPUT = 1, /**< Input event */
PA_IO_EVENT_OUTPUT = 2, /**< Output event */
PA_IO_EVENT_HANGUP = 4, /**< Hangup event */
PA_IO_EVENT_ERROR = 8 /**< Error event */
} pa_io_event_flags_t;
/** An opaque IO event source object */
typedef struct pa_io_event pa_io_event;
/** An IO event callback prototype \since 0.9.3 */
typedef void (*pa_io_event_cb_t)(pa_mainloop_api*ea, pa_io_event* e, int fd, pa_io_event_flags_t events, void *userdata);
/** A IO event destroy callback prototype \since 0.9.3 */
typedef void (*pa_io_event_destroy_cb_t)(pa_mainloop_api*a, pa_io_event *e, void *userdata);
/** An opaque timer event source object */
typedef struct pa_time_event pa_time_event;
/** A time event callback prototype \since 0.9.3 */
typedef void (*pa_time_event_cb_t)(pa_mainloop_api*a, pa_time_event* e, const struct timeval *tv, void *userdata);
/** A time event destroy callback prototype \since 0.9.3 */
typedef void (*pa_time_event_destroy_cb_t)(pa_mainloop_api*a, pa_time_event *e, void *userdata);
/** An opaque deferred event source object. Events of this type are triggered once in every main loop iteration */
typedef struct pa_defer_event pa_defer_event;
/** A defer event callback prototype \since 0.9.3 */
typedef void (*pa_defer_event_cb_t)(pa_mainloop_api*a, pa_defer_event* e, void *userdata);
/** A defer event destroy callback prototype \since 0.9.3 */
typedef void (*pa_defer_event_destroy_cb_t)(pa_mainloop_api*a, pa_defer_event *e, void *userdata);
/** An abstract mainloop API vtable */
struct pa_mainloop_api {
/** A pointer to some private, arbitrary data of the main loop implementation */
void *userdata;
/** Create a new IO event source object */
pa_io_event* (*io_new)(pa_mainloop_api*a, int fd, pa_io_event_flags_t events, pa_io_event_cb_t cb, void *userdata);
/** Enable or disable IO events on this object */
void (*io_enable)(pa_io_event* e, pa_io_event_flags_t events);
/** Free a IO event source object */
void (*io_free)(pa_io_event* e);
/** Set a function that is called when the IO event source is destroyed. Use this to free the userdata argument if required */
void (*io_set_destroy)(pa_io_event *e, pa_io_event_destroy_cb_t cb);
/** Create a new timer event source object for the specified Unix time */
pa_time_event* (*time_new)(pa_mainloop_api*a, const struct timeval *tv, pa_time_event_cb_t cb, void *userdata);
/** Restart a running or expired timer event source with a new Unix time */
void (*time_restart)(pa_time_event* e, const struct timeval *tv);
/** Free a deferred timer event source object */
void (*time_free)(pa_time_event* e);
/** Set a function that is called when the timer event source is destroyed. Use this to free the userdata argument if required */
void (*time_set_destroy)(pa_time_event *e, pa_time_event_destroy_cb_t cb);
/** Create a new deferred event source object */
pa_defer_event* (*defer_new)(pa_mainloop_api*a, pa_defer_event_cb_t cb, void *userdata);
/** Enable or disable a deferred event source temporarily */
void (*defer_enable)(pa_defer_event* e, int b);
/** Free a deferred event source object */
void (*defer_free)(pa_defer_event* e);
/** Set a function that is called when the deferred event source is destroyed. Use this to free the userdata argument if required */
void (*defer_set_destroy)(pa_defer_event *e, pa_defer_event_destroy_cb_t cb);
/** Exit the main loop and return the specified retval*/
void (*quit)(pa_mainloop_api*a, int retval);
};
/** Run the specified callback function once from the main loop using an
* anonymous defer event. If the mainloop runs in a different thread, you need
* to follow the mainloop implementation's rules regarding how to safely create
* defer events. In particular, if you're using \ref pa_threaded_mainloop, you
* must lock the mainloop before calling this function. */
void pa_mainloop_api_once(pa_mainloop_api*m, void (*callback)(pa_mainloop_api*m, void *userdata), void *userdata);
PA_C_DECL_END
#endif
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