freeswitch/libs/sofia-sip/libsofia-sip-ua/su/sofia-sip/su_wait.h

617 lines
19 KiB
C

/*
* This file is part of the Sofia-SIP package
*
* Copyright (C) 2005 Nokia Corporation.
*
* Contact: Pekka Pessi <pekka.pessi@nokia.com>
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#ifndef SU_WAIT_H
/** Defined when <sofia-sip/su_wait.h> has been included. */
#define SU_WAIT_H
/**@ingroup su_wait
* @file sofia-sip/su_wait.h Syncronization and threading interface.
*
* @author Pekka Pessi <Pekka.Pessi@nokia.com>
* @author Martti Mela <Martti.Mela@nokia.com>
*
* @date Created: Tue Sep 14 15:51:04 1999 ppessi
*/
/* ---------------------------------------------------------------------- */
/* Includes */
#ifndef SU_H
#include "sofia-sip/su.h"
#endif
#ifndef SU_TIME_H
#include "sofia-sip/su_time.h"
#endif
#if SU_HAVE_POLL
#include <sys/poll.h>
#endif
SOFIA_BEGIN_DECLS
/* ---------------------------------------------------------------------- */
/* Constants */
#if SU_HAVE_KQUEUE
/** Compare wait object. @HI */
#define SU_WAIT_CMP(x, y) \
(((x).ident - (y).ident) ? ((x).ident - (y).ident) : ((x).flags - (y).flags))
/** Incoming data is available on socket. @HI */
#define SU_WAIT_IN (EVFILT_READ)
/** Data can be sent on socket. @HI */
#define SU_WAIT_OUT (EVFILT_WRITE)
/** Socket is connected. @HI */
#define SU_WAIT_CONNECT (EVFILT_WRITE)
/** An error occurred on socket. @HI */
#define SU_WAIT_ERR (EV_ERROR)
/** The socket connection was closed. @HI */
#define SU_WAIT_HUP (EV_EOF)
/** A listening socket accepted a new connection. @HI */
#define SU_WAIT_ACCEPT (EVFILT_READ)
/** No timeout for su_wait(). */
#define SU_WAIT_FOREVER (-1)
/** The return value of su_wait() if timeout occurred. */
#define SU_WAIT_TIMEOUT (-2)
/** Initializer for a wait object. @HI */
#define SU_WAIT_INIT { INVALID_SOCKET, 0, 0, 0, 0, NULL }
/** Maximum number of sources supported by su_wait() */
#define SU_WAIT_MAX (0x7fffffff)
#elif SU_HAVE_POLL || DOCUMENTATION_ONLY
/** Compare wait object. @HI */
#define SU_WAIT_CMP(x, y) \
(((x).fd - (y).fd) ? ((x).fd - (y).fd) : ((x).events - (y).events))
/** Incoming data is available on socket. @HI */
#define SU_WAIT_IN (POLLIN)
/** Data can be sent on socket. @HI */
#define SU_WAIT_OUT (POLLOUT)
/** Socket is connected. @HI */
#define SU_WAIT_CONNECT (POLLOUT)
/** An error occurred on socket. @HI */
#define SU_WAIT_ERR (POLLERR)
/** The socket connection was closed. @HI */
#define SU_WAIT_HUP (POLLHUP)
/** A listening socket accepted a new connection. @HI */
#define SU_WAIT_ACCEPT (POLLIN)
/** No timeout for su_wait(). */
#define SU_WAIT_FOREVER (-1)
/** The return value of su_wait() if timeout occurred. */
#define SU_WAIT_TIMEOUT (-2)
/** Initializer for a wait object. @HI */
#define SU_WAIT_INIT { INVALID_SOCKET, 0, 0 }
/** Maximum number of sources supported by su_wait() */
#define SU_WAIT_MAX (0x7fffffff)
#elif SU_HAVE_WINSOCK
#define SU_WAIT_CMP(x, y) ((intptr_t)(x) - (intptr_t)(y))
#define SU_WAIT_IN (FD_READ)
#define SU_WAIT_OUT (FD_WRITE)
#define SU_WAIT_CONNECT (FD_CONNECT)
#define SU_WAIT_ERR (0) /* let's get it on */
#define SU_WAIT_HUP (FD_CLOSE)
#define SU_WAIT_ACCEPT (FD_ACCEPT)
#define SU_WAIT_FOREVER (WSA_INFINITE)
#define SU_WAIT_TIMEOUT (WSA_WAIT_TIMEOUT)
#define SU_WAIT_INIT NULL
#define SU_WAIT_MAX (64)
#else
/* If nothing works, try these */
#define POLLIN 0x001
#define POLLPRI 0x002
#define POLLOUT 0x004
#ifdef __USE_XOPEN
#define POLLRDNORM 0x040
#define POLLRDBAND 0x080
#define POLLWRNORM 0x100
#define POLLWRBAND 0x200
#endif
/* These for pollfd.revents */
#define POLLERR 0x008
#define POLLHUP 0x010
#define POLLNVAL 0x020
#define SU_WAIT_CMP(x, y) \
(((x).fd - (y).fd) ? ((x).fd - (y).fd) : ((x).events - (y).events))
#define SU_WAIT_IN POLLIN
#define SU_WAIT_OUT POLLOUT
#define SU_WAIT_CONNECT POLLOUT
#define SU_WAIT_ERR POLLERR
#define SU_WAIT_HUP POLLHUP
#define SU_WAIT_ACCEPT POLLIN
#define SU_WAIT_FOREVER (-1)
#define SU_WAIT_TIMEOUT (-2)
#define SU_WAIT_INIT { INVALID_SOCKET, 0, 0 }
/** Maximum number of sources supported by su_wait() */
#define SU_WAIT_MAX (0x7fffffff)
#endif
/* ---------------------------------------------------------------------- */
/* Types */
/** Wait object. */
#if SU_HAVE_KQUEUE
typedef struct kevent su_wait_t;
#elif SU_HAVE_POLL
typedef struct pollfd su_wait_t;
#elif SU_HAVE_WINSOCK
typedef HANDLE su_wait_t;
#else
/* typedef struct os_specific su_wait_t; */
typedef struct pollfd su_wait_t;
struct pollfd {
su_socket_t fd; /* file descriptor */
short events; /* requested events */
short revents; /* returned events */
};
/* Type used for the number of file descriptors. */
typedef unsigned long int nfds_t;
/* Poll the file descriptors described by the NFDS structures starting at
FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
an event to occur; if TIMEOUT is -1, block until an event occurs.
Returns the number of file descriptors with events, zero if timed out,
or -1 for errors. */
int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout);
#endif
/* Used by AD */
typedef int su_success_t;
/* ---------------------------------------------------------------------- */
/** <a href="#su_root_t">Root object</a> type. */
typedef struct su_root_s su_root_t;
#ifndef SU_ROOT_MAGIC_T
/**Default type of application context for <a href="#su_root_t">su_root_t</a>.
*
* Application may define the typedef ::su_root_magic_t to appropriate type
* by defining macro SU_ROOT_MAGIC_T before including <sofia-sip/su_wait.h>, for
* example,
* @code
* #define SU_ROOT_MAGIC_T struct context
f * #include <sofia-sip/su_wait.h>
* @endcode
*/
#define SU_ROOT_MAGIC_T void
#endif
/** <a href="#su_root_t">Root context</a> pointer type.
*
* Application may define the typedef ::su_root_magic_t to appropriate type
* by defining macro SU_ROOT_MAGIC_T () before including <sofia-sip/su_wait.h>, for
* example,
* @code
* #define SU_ROOT_MAGIC_T struct context
* #include <sofia-sip/su_wait.h>
* @endcode
*/
typedef SU_ROOT_MAGIC_T su_root_magic_t;
#ifndef SU_WAKEUP_ARG_T
/**Default type of @link ::su_wakeup_f wakeup function @endlink
* @link ::su_wakeup_arg_t argument type @endlink.
*
* The application can define the typedef ::su_wakeup_arg_t by defining
* the SU_WAKEUP_ARG_T () before including <sofia-sip/su_wait.h>, for example,
* @code
* #define SU_WAKEUP_ARG_T struct transport
* #include <sofia-sip/su_wait.h>
* @endcode
*/
#define SU_WAKEUP_ARG_T void
#endif
/** @link ::su_wakeup_f Wakeup callback @endlink argument type.
*
* The application can define the typedef ::su_wakeup_arg_t by defining
* the SU_WAKEUP_ARG_T () before including <sofia-sip/su_wait.h>, for example,
* @code
* #define SU_WAKEUP_ARG_T struct transport
* #include <sofia-sip/su_wait.h>
* @endcode
*/
typedef SU_WAKEUP_ARG_T su_wakeup_arg_t;
/** Wakeup callback function pointer type.
*
* Whenever a registered wait object receives an event, the @link
* ::su_wakeup_f callback function @endlink is invoked.
*/
typedef int (*su_wakeup_f)(su_root_magic_t *,
su_wait_t *,
su_wakeup_arg_t *arg);
enum {
su_pri_normal, /**< Normal priority */
su_pri_first, /**< Elevated priority */
su_pri_realtime /**< Real-time priority */
};
struct _GSource;
/** Hint for number of registered fds in su_root */
SOFIAPUBVAR int su_root_size_hint;
/* ---------------------------------------------------------------------- */
/* Pre-poll callback */
#ifndef SU_PREPOLL_MAGIC_T
/**Default type of application context for prepoll function.
*
* Application may define the typedef ::su_prepoll_magic_t to appropriate type
* by defining macro #SU_PREPOLL_MAGIC_T before including <sofia-sip/su_wait.h>, for
* example,
* @code
* #define SU_PREPOLL_MAGIC_T struct context
* #include <sofia-sip/su_wait.h>
* @endcode
*/
#define SU_PREPOLL_MAGIC_T void
#endif
/** <a href="#su_root_t">Root context</a> pointer type.
*
* Application may define the typedef ::su_prepoll_magic_t to appropriate type
* by defining macro #SU_PREPOLL_MAGIC_T before including <sofia-sip/su_wait.h>, for
* example,
* @code
* #define SU_PREPOLL_MAGIC_T struct context
* #include <sofia-sip/su_wait.h>
* @endcode
*/
typedef SU_PREPOLL_MAGIC_T su_prepoll_magic_t;
/** Pre-poll callback function prototype.
*
*
*/
typedef void su_prepoll_f(su_prepoll_magic_t *, su_root_t *);
/* ---------------------------------------------------------------------- */
/* Timers */
#ifdef SU_TIMER_T
#error SU_TIMER_T defined
#endif
#ifndef SU_TIMER_ARG_T
/** Default type of timer expiration callback function argument type.
* Application may define this to appropriate type before including
* <sofia-sip/su_wait.h>. */
#define SU_TIMER_ARG_T void
#endif
/** Timer object type. */
typedef struct su_timer_s su_timer_t;
/** Timer callback argument type. */
typedef SU_TIMER_ARG_T su_timer_arg_t;
/** Timeout function type. */
typedef void (*su_timer_f)(su_root_magic_t *magic,
su_timer_t *t,
su_timer_arg_t *arg);
#ifndef SU_TIMER_QUEUE_T
#define SU_TIMER_QUEUE_T su_timer_t *
#endif
typedef SU_TIMER_QUEUE_T su_timer_queue_t;
/* ---------------------------------------------------------------------- */
/* Tasks */
/** Port type. */
typedef struct su_port_s su_port_t;
typedef struct { su_port_t *sut_port; su_root_t *sut_root; } _su_task_t;
/** Task reference type. */
typedef _su_task_t su_task_r[1];
/** Initializer for a task reference. @HI */
#define SU_TASK_R_INIT {{ NULL, NULL }}
/* This must be used instead of su_task_r as return value type. */
typedef _su_task_t const *_su_task_r;
/* ---------------------------------------------------------------------- */
/* Messages */
#ifndef SU_MSG_ARG_T
/** Default type of su_msg_t message data. Application may define this to
* appropriate type before including <sofia-sip/su_wait.h>.
*/
#define SU_MSG_ARG_T void
#endif
/** Message argument type. */
typedef SU_MSG_ARG_T su_msg_arg_t;
/** Message type. */
typedef struct su_msg_s su_msg_t;
/** Message reference type. */
typedef su_msg_t *su_msg_r[1];
/** Constant reference to su_msg.
*
* @note The reference is constant, but the message can be modified.
*/
typedef su_msg_t * const su_msg_cr[1];
/** Initializer for a message reference. @HI */
#define SU_MSG_R_INIT { NULL }
/** Message delivery function type. */
typedef void su_msg_function(su_root_magic_t *magic,
su_msg_r msg,
su_msg_arg_t *arg);
/** Message deinitializer function type. @NEW_1_12_8 */
typedef void su_msg_deinit_function(su_msg_arg_t *arg);
/** Message delivery function pointer type. */
typedef su_msg_function *su_msg_f;
/* ---------------------------------------------------------------------- */
/* Clones */
#ifndef SU_CLONE_T
#define SU_CLONE_T struct su_clone_s
#endif
/** Clone reference. */
typedef SU_CLONE_T *su_clone_r[1];
/** Clone reference initializer. */
#define SU_CLONE_R_INIT {NULL}
/** Clone initialization function type. */
typedef int (*su_root_init_f)(su_root_t *, su_root_magic_t *);
/** Clone finalization function type. */
typedef void (*su_root_deinit_f)(su_root_t *, su_root_magic_t *);
/* ---------------------------------------------------------------------- */
/* Functions */
/* Wait */
SOFIAPUBFUN void su_wait_init(su_wait_t dst[1]);
SOFIAPUBFUN int su_wait_create(su_wait_t *dst, su_socket_t s, int events);
SOFIAPUBFUN int su_wait_destroy(su_wait_t *dst);
SOFIAPUBFUN int su_wait(su_wait_t waits[], unsigned n, su_duration_t timeout);
SOFIAPUBFUN int su_wait_events(su_wait_t *wait, su_socket_t s);
SOFIAPUBFUN int su_wait_mask(su_wait_t *dst, su_socket_t s, int events);
#if !HAVE_WIN32 && (SU_HAVE_POLL || HAVE_SELECT)
su_inline
su_socket_t su_wait_socket(su_wait_t *wait)
{
#if SU_HAVE_KQUEUE
return wait->ident;
#else
return wait->fd;
#endif
}
#endif
/* Root */
SOFIAPUBFUN su_root_t *su_root_create(su_root_magic_t *magic)
__attribute__((__malloc__));
SOFIAPUBFUN void su_root_destroy(su_root_t*);
SOFIAPUBFUN char const *su_root_name(su_root_t *self);
SOFIAPUBFUN int su_root_set_magic(su_root_t *self, su_root_magic_t *magic);
SOFIAPUBFUN su_root_magic_t *su_root_magic(su_root_t *root);
SOFIAPUBFUN int su_root_register(su_root_t*, su_wait_t *,
su_wakeup_f, su_wakeup_arg_t *,
int priority);
/* This is slow. Deprecated. */
SOFIAPUBFUN int su_root_unregister(su_root_t*, su_wait_t *,
su_wakeup_f, su_wakeup_arg_t*);
SOFIAPUBFUN int su_root_deregister(su_root_t*, int);
SOFIAPUBFUN int su_root_eventmask(su_root_t *,
int index, int socket, int events);
SOFIAPUBFUN su_duration_t su_root_step(su_root_t *root, su_duration_t timeout);
SOFIAPUBFUN su_duration_t su_root_sleep(su_root_t *root, su_duration_t);
SOFIAPUBFUN int su_root_multishot(su_root_t *root, int multishot);
SOFIAPUBFUN void su_root_run(su_root_t *root);
SOFIAPUBFUN void su_root_break(su_root_t *root);
SOFIAPUBFUN _su_task_r su_root_task(su_root_t const *root);
SOFIAPUBFUN _su_task_r su_root_parent(su_root_t const *root);
SOFIAPUBFUN int su_root_add_prepoll(su_root_t *root,
su_prepoll_f *,
su_prepoll_magic_t *);
SOFIAPUBFUN int su_root_remove_prepoll(su_root_t *root);
SOFIAPUBFUN struct _GSource *su_root_gsource(su_root_t *self);
SOFIAPUBFUN int su_root_yield(su_root_t *root);
SOFIAPUBFUN int su_root_release(su_root_t *root);
SOFIAPUBFUN int su_root_obtain(su_root_t *root);
SOFIAPUBFUN int su_root_has_thread(su_root_t *root);
SOFIAPUBFUN int su_root_set_max_defer(su_root_t *, su_duration_t max_defer);
SOFIAPUBFUN su_duration_t su_root_get_max_defer(su_root_t const *self);
SOFIAPUBFUN su_root_t *su_root_clone(su_root_t *root, su_root_magic_t *magic)
__attribute__((__malloc__));
/* Timers */
SOFIAPUBFUN su_timer_t *su_timer_create(su_task_r const, su_duration_t msec)
__attribute__((__malloc__));
SOFIAPUBFUN void su_timer_destroy(su_timer_t *);
SOFIAPUBFUN int su_timer_is_set(su_timer_t const *t); /* 1.12.11 */
SOFIAPUBFUN su_time_t su_timer_latest(su_timer_t const *t);
SOFIAPUBFUN int su_timer_set(su_timer_t *, su_timer_f, su_timer_arg_t *);
SOFIAPUBFUN int su_timer_set_interval(su_timer_t *t, su_timer_f,
su_timer_arg_t *, su_duration_t);
SOFIAPUBFUN int su_timer_set_at(su_timer_t *, su_timer_f,
su_timer_arg_t *, su_time_t);
SOFIAPUBFUN int su_timer_run(su_timer_t *, su_timer_f, su_timer_arg_t *);
SOFIAPUBFUN int su_timer_set_for_ever(su_timer_t *, su_timer_f,
su_timer_arg_t *);
SOFIAPUBFUN int su_timer_reset(su_timer_t *);
SOFIAPUBFUN su_root_t *su_timer_root(su_timer_t const *);
SOFIAPUBFUN int su_timer_expire(su_timer_queue_t * const,
su_duration_t *tout,
su_time_t now);
SOFIAPUBFUN int su_timer_deferrable(su_timer_t *t, int value); /* 1.12.11 */
/* Tasks */
SOFIAPUBVAR su_task_r const su_task_null;
SOFIAPUBFUN _su_task_r su_task_init(su_task_r task);
SOFIAPUBFUN void su_task_deinit(su_task_r task);
SOFIAPUBFUN void su_task_copy(su_task_r dst, su_task_r const src);
SOFIAPUBFUN void su_task_move(su_task_r dst, su_task_r src);
SOFIAPUBFUN int su_task_cmp(su_task_r const, su_task_r const);
SOFIAPUBFUN int su_task_is_running(su_task_r const);
SOFIAPUBFUN su_root_t *su_task_root(su_task_r const self);
SOFIAPUBFUN su_timer_queue_t *su_task_timers(su_task_r const self);
SOFIAPUBFUN su_timer_queue_t *su_task_deferrable(su_task_r const task);
SOFIAPUBFUN int su_task_wakeup(su_task_r const task);
SOFIAPUBFUN int su_task_execute(su_task_r const task,
int (*function)(void *), void *arg,
int *return_value);
/* Messages */
SOFIAPUBFUN int su_msg_create(su_msg_r msg,
su_task_r const to, su_task_r const from,
su_msg_f wakeup, isize_t size);
SOFIAPUBFUN int su_msg_report(su_msg_r msg, su_msg_f report);
SOFIAPUBFUN int su_msg_deinitializer(su_msg_r msg, su_msg_deinit_function *);
SOFIAPUBFUN int su_msg_reply(su_msg_r reply, su_msg_cr msg,
su_msg_f wakeup, isize_t size);
SOFIAPUBFUN void su_msg_destroy(su_msg_r msg);
SOFIAPUBFUN void su_msg_save(su_msg_r msg, su_msg_r msg0);
SOFIAPUBFUN void su_msg_remove_refs(su_msg_cr msg);
SOFIAPUBFUN su_msg_arg_t *su_msg_data(su_msg_cr msg);
SOFIAPUBFUN isize_t su_msg_size(su_msg_cr msg);
SOFIAPUBFUN _su_task_r su_msg_from(su_msg_cr msg);
SOFIAPUBFUN _su_task_r su_msg_to(su_msg_cr msg);
SOFIAPUBFUN int su_msg_send(su_msg_r msg);
SOFIAPUBFUN int su_msg_new(su_msg_r msg, size_t size);
SOFIAPUBFUN int su_msg_send_to(su_msg_r msg,
su_task_r const to,
su_msg_f wakeup);
/** Does reference contain a message? */
#if SU_HAVE_INLINE
static SU_INLINE
int su_msg_is_non_null(su_msg_cr msg)
{
return msg && *msg != NULL;
}
#else
#define su_msg_is_non_null(msg) ((msg) && (*(msg)) != NULL)
#endif
/* Clones */
SOFIAPUBFUN int su_root_threading(su_root_t *self, int enable);
SOFIAPUBFUN int su_clone_start(su_root_t *root,
su_clone_r,
su_root_magic_t *magic,
su_root_init_f,
su_root_deinit_f);
SOFIAPUBFUN _su_task_r su_clone_task(su_clone_r);
SOFIAPUBFUN void su_clone_forget(su_clone_r);
SOFIAPUBFUN void su_clone_stop(su_clone_r);
SOFIAPUBFUN void su_clone_wait(su_root_t *root, su_clone_r clone);
SOFIAPUBFUN int su_clone_pause(su_clone_r);
SOFIAPUBFUN int su_clone_resume(su_clone_r);
/* ---------------------------------------------------------------------- */
/* Different su_root_t implementations */
typedef su_port_t *su_port_create_f(void);
typedef int su_clone_start_f(su_root_t *parent,
su_clone_r return_clone,
su_root_magic_t *magic,
su_root_init_f init,
su_root_deinit_f deinit);
SOFIAPUBFUN void su_port_prefer(su_port_create_f *f, su_clone_start_f *);
SOFIAPUBFUN su_port_create_f su_default_port_create;
SOFIAPUBFUN su_port_create_f su_epoll_port_create;
SOFIAPUBFUN su_port_create_f su_poll_port_create;
SOFIAPUBFUN su_port_create_f su_wsaevent_port_create;
SOFIAPUBFUN su_port_create_f su_select_port_create;
SOFIAPUBFUN su_port_create_f su_kqueue_port_create;
SOFIAPUBFUN su_port_create_f su_devpoll_port_create;
SOFIAPUBFUN su_clone_start_f su_default_clone_start;
SOFIAPUBFUN su_clone_start_f su_epoll_clone_start;
SOFIAPUBFUN su_clone_start_f su_poll_clone_start;
SOFIAPUBFUN su_clone_start_f su_wsaevent_clone_start;
SOFIAPUBFUN su_clone_start_f su_select_clone_start;
SOFIAPUBFUN su_clone_start_f su_kqueue_clone_start;
SOFIAPUBFUN su_clone_start_f su_devpoll_clone_start;
SOFIA_END_DECLS
#endif /* SU_WAIT_H */