pulseaudio/src/mainloop-api.h

#ifndef foomainloopapihfoo
#define foomainloopapihfoo

#include <time.h>
#include <sys/time.h>

enum pa_mainloop_api_io_events {
    PA_MAINLOOP_API_IO_EVENT_NULL = 0,
    PA_MAINLOOP_API_IO_EVENT_INPUT = 1,
    PA_MAINLOOP_API_IO_EVENT_OUTPUT = 2,
    PA_MAINLOOP_API_IO_EVENT_BOTH = 3,
    PA_MAINLOOP_API_IO_EVENT_HUP = 4
};

struct pa_mainloop_api {
    void *userdata;

    /* IO sources */
    void* (*source_io)(struct pa_mainloop_api*a, int fd, enum pa_mainloop_api_io_events events, void (*callback) (struct pa_mainloop_api*a, void *id, int fd, enum pa_mainloop_api_io_events events, void *userdata), void *userdata);
    void  (*enable_io)(struct pa_mainloop_api*a, void* id, enum pa_mainloop_api_io_events events);
    void  (*cancel_io)(struct pa_mainloop_api*a, void* id);

    /* Fixed sources */
    void* (*source_fixed)(struct pa_mainloop_api*a, void (*callback) (struct pa_mainloop_api*a, void *id, void *userdata), void *userdata);
    void  (*enable_fixed)(struct pa_mainloop_api*a, void* id, int b);
    void  (*cancel_fixed)(struct pa_mainloop_api*a, void* id);

    /* Idle sources */
    void* (*source_idle)(struct pa_mainloop_api*a, void (*callback) (struct pa_mainloop_api*a, void *id, void *userdata), void *userdata);
    void  (*enable_idle)(struct pa_mainloop_api*a, void* id, int b);
    void  (*cancel_idle)(struct pa_mainloop_api*a, void* id);
    
    /* Time sources */
    void* (*source_time)(struct pa_mainloop_api*a, const struct timeval *tv, void (*callback) (struct pa_mainloop_api*a, void *id, const struct timeval *tv, void *userdata), void *userdata);
    void  (*enable_time)(struct pa_mainloop_api*a, void *id, const struct timeval *tv);
    void  (*cancel_time)(struct pa_mainloop_api*a, void* id);

    /* Exit mainloop */
    void (*quit)(struct pa_mainloop_api*a, int retval);
};

void pa_mainloop_api_once(struct pa_mainloop_api*m, void (*callback)(void *userdata), void *userdata);

#endif