text: /*
   * libev native API header
   *
   * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modifica-
   * tion, are permitted provided that the following conditions are met:
   *
   *   1.  Redistributions of source code must retain the above copyright notice,
   *       this list of conditions and the following disclaimer.
   *
   *   2.  Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
   * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
   * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
   * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
   * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * Alternatively, the contents of this file may be used under the terms of
   * the GNU General Public License ("GPL") version 2 or any later version,
   * in which case the provisions of the GPL are applicable instead of
   * the above. If you wish to allow the use of your version of this file
   * only under the terms of the GPL and not to allow others to use your
   * version of this file under the BSD license, indicate your decision
   * by deleting the provisions above and replace them with the notice
   * and other provisions required by the GPL. If you do not delete the
   * provisions above, a recipient may use your version of this file under
   * either the BSD or the GPL.
   */
  
  #ifndef EV_H_
  #define EV_H_
  
  #ifdef __cplusplus
  # define EV_CPP(x) x
  #else
  # define EV_CPP(x)
  #endif
  
  #define EV_THROW EV_CPP(throw())
  
  EV_CPP(extern "C" {)
  
  /*****************************************************************************/
  
  /* pre-4.0 compatibility */
  #ifndef EV_COMPAT3
  # define EV_COMPAT3 1
  #endif
  
  #ifndef EV_FEATURES
  # if defined __OPTIMIZE_SIZE__
  #  define EV_FEATURES 0x7c
  # else
  #  define EV_FEATURES 0x7f
  # endif
  #endif
  
  #define EV_FEATURE_CODE     ((EV_FEATURES) &  1)
  #define EV_FEATURE_DATA     ((EV_FEATURES) &  2)
  #define EV_FEATURE_CONFIG   ((EV_FEATURES) &  4)
  #define EV_FEATURE_API      ((EV_FEATURES) &  8)
  #define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16)
  #define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32)
  #define EV_FEATURE_OS       ((EV_FEATURES) & 64)
  
  /* these priorities are inclusive, higher priorities will be invoked earlier */
  #ifndef EV_MINPRI
  # define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0)
  #endif
  #ifndef EV_MAXPRI
  # define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0)
  #endif
  
  #ifndef EV_MULTIPLICITY
  # define EV_MULTIPLICITY EV_FEATURE_CONFIG
  #endif
  
  #ifndef EV_PERIODIC_ENABLE
  # define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_STAT_ENABLE
  # define EV_STAT_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_PREPARE_ENABLE
  # define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_CHECK_ENABLE
  # define EV_CHECK_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_IDLE_ENABLE
  # define EV_IDLE_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_FORK_ENABLE
  # define EV_FORK_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_CLEANUP_ENABLE
  # define EV_CLEANUP_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_SIGNAL_ENABLE
  # define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_CHILD_ENABLE
  # ifdef _WIN32
  #  define EV_CHILD_ENABLE 0
  # else
  #  define EV_CHILD_ENABLE EV_FEATURE_WATCHERS
  #endif
  #endif
  
  #ifndef EV_ASYNC_ENABLE
  # define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_EMBED_ENABLE
  # define EV_EMBED_ENABLE EV_FEATURE_WATCHERS
  #endif
  
  #ifndef EV_WALK_ENABLE
  # define EV_WALK_ENABLE 0 /* not yet */
  #endif
  
  /*****************************************************************************/
  
  #if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE
  # undef EV_SIGNAL_ENABLE
  # define EV_SIGNAL_ENABLE 1
  #endif
  
  /*****************************************************************************/
  
  typedef double ev_tstamp;
  
  #ifndef EV_ATOMIC_T
  # include <signal.h>
  # define EV_ATOMIC_T sig_atomic_t volatile
  #endif
  
  #if EV_STAT_ENABLE
  # ifdef _WIN32
  #  include <time.h>
  #  include <sys/types.h>
  # endif
  # include <sys/stat.h>
  #endif
  
  /* support multiple event loops? */
  #if EV_MULTIPLICITY
  struct ev_loop;
  # define EV_P  struct ev_loop *loop               /* a loop as sole parameter in a declaration */
  # define EV_P_ EV_P,                              /* a loop as first of multiple parameters */
  # define EV_A  loop                               /* a loop as sole argument to a function call */
  # define EV_A_ EV_A,                              /* a loop as first of multiple arguments */
  # define EV_DEFAULT_UC  ev_default_loop_uc_ ()    /* the default loop, if initialised, as sole arg */
  # define EV_DEFAULT_UC_ EV_DEFAULT_UC,            /* the default loop as first of multiple arguments */
  # define EV_DEFAULT  ev_default_loop (0)          /* the default loop as sole arg */
  # define EV_DEFAULT_ EV_DEFAULT,                  /* the default loop as first of multiple arguments */
  #else
  # define EV_P void
  # define EV_P_
  # define EV_A
  # define EV_A_
  # define EV_DEFAULT
  # define EV_DEFAULT_
  # define EV_DEFAULT_UC
  # define EV_DEFAULT_UC_
  # undef EV_EMBED_ENABLE
  #endif
  
  /* EV_INLINE is used for functions in header files */
  #if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3
  # define EV_INLINE static inline
  #else
  # define EV_INLINE static
  #endif
  
  #ifdef EV_API_STATIC
  # define EV_API_DECL static
  #else
  # define EV_API_DECL extern
  #endif
  
  /* EV_PROTOTYPES can be used to switch of prototype declarations */
  #ifndef EV_PROTOTYPES
  # define EV_PROTOTYPES 1
  #endif
  
  /*****************************************************************************/
  
  #define EV_VERSION_MAJOR 4
  #define EV_VERSION_MINOR 18
  
  /* eventmask, revents, events... */
  enum {
    EV_UNDEF    = (int)0xFFFFFFFF, /* guaranteed to be invalid */
    EV_NONE     =            0x00, /* no events */
    EV_READ     =            0x01, /* ev_io detected read will not block */
    EV_WRITE    =            0x02, /* ev_io detected write will not block */
    EV__IOFDSET =            0x80, /* internal use only */
    EV_IO       =         EV_READ, /* alias for type-detection */
    EV_TIMER    =      0x00000100, /* timer timed out */
  #if EV_COMPAT3
    EV_TIMEOUT  =        EV_TIMER, /* pre 4.0 API compatibility */
  #endif
    EV_PERIODIC =      0x00000200, /* periodic timer timed out */
    EV_SIGNAL   =      0x00000400, /* signal was received */
    EV_CHILD    =      0x00000800, /* child/pid had status change */
    EV_STAT     =      0x00001000, /* stat data changed */
    EV_IDLE     =      0x00002000, /* event loop is idling */
    EV_PREPARE  =      0x00004000, /* event loop about to poll */
    EV_CHECK    =      0x00008000, /* event loop finished poll */
    EV_EMBED    =      0x00010000, /* embedded event loop needs sweep */
    EV_FORK     =      0x00020000, /* event loop resumed in child */
    EV_CLEANUP  =      0x00040000, /* event loop resumed in child */
    EV_ASYNC    =      0x00080000, /* async intra-loop signal */
    EV_CUSTOM   =      0x01000000, /* for use by user code */
    EV_ERROR    = (int)0x80000000  /* sent when an error occurs */
  };
  
  /* can be used to add custom fields to all watchers, while losing binary compatibility */
  #ifndef EV_COMMON
  # define EV_COMMON void *data;
  #endif
  
  #ifndef EV_CB_DECLARE
  # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
  #endif
  #ifndef EV_CB_INVOKE
  # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))
  #endif
  
  /* not official, do not use */
  #define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents)
  
  /*
   * struct member types:
   * private: you may look at them, but not change them,
   *          and they might not mean anything to you.
   * ro: can be read anytime, but only changed when the watcher isn't active.
   * rw: can be read and modified anytime, even when the watcher is active.
   *
   * some internal details that might be helpful for debugging:
   *
   * active is either 0, which means the watcher is not active,
   *           or the array index of the watcher (periodics, timers)
   *           or the array index + 1 (most other watchers)
   *           or simply 1 for watchers that aren't in some array.
   * pending is either 0, in which case the watcher isn't,
   *           or the array index + 1 in the pendings array.
   */
  
  #if EV_MINPRI == EV_MAXPRI
  # define EV_DECL_PRIORITY
  #elif !defined (EV_DECL_PRIORITY)
  # define EV_DECL_PRIORITY int priority;
  #endif
  
  /* shared by all watchers */
  #define EV_WATCHER(type)			\
    int active; /* private */			\
    int pending; /* private */			\
    EV_DECL_PRIORITY /* private */		\
    EV_COMMON /* rw */				\
    EV_CB_DECLARE (type) /* private */
  
  #define EV_WATCHER_LIST(type)			\
    EV_WATCHER (type)				\
    struct ev_watcher_list *next; /* private */
  
  #define EV_WATCHER_TIME(type)			\
    EV_WATCHER (type)				\
    ev_tstamp at;     /* private */
  
  /* base class, nothing to see here unless you subclass */
  typedef struct ev_watcher
  {
    EV_WATCHER (ev_watcher)
  } ev_watcher;
  
  /* base class, nothing to see here unless you subclass */
  typedef struct ev_watcher_list
  {
    EV_WATCHER_LIST (ev_watcher_list)
  } ev_watcher_list;
  
  /* base class, nothing to see here unless you subclass */
  typedef struct ev_watcher_time
  {
    EV_WATCHER_TIME (ev_watcher_time)
  } ev_watcher_time;
  
  /* invoked when fd is either EV_READable or EV_WRITEable */
  /* revent EV_READ, EV_WRITE */
  typedef struct ev_io
  {
    EV_WATCHER_LIST (ev_io)
  
    int fd;     /* ro */
    int events; /* ro */
  } ev_io;
  
  /* invoked after a specific time, repeatable (based on monotonic clock) */
  /* revent EV_TIMEOUT */
  typedef struct ev_timer
  {
    EV_WATCHER_TIME (ev_timer)
  
    ev_tstamp repeat; /* rw */
  } ev_timer;
  
  /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
  /* revent EV_PERIODIC */
  typedef struct ev_periodic
  {
    EV_WATCHER_TIME (ev_periodic)
  
    ev_tstamp offset; /* rw */
    ev_tstamp interval; /* rw */
    ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) EV_THROW; /* rw */
  } ev_periodic;
  
  /* invoked when the given signal has been received */
  /* revent EV_SIGNAL */
  typedef struct ev_signal
  {
    EV_WATCHER_LIST (ev_signal)
  
    int signum; /* ro */
  } ev_signal;
  
  /* invoked when sigchld is received and waitpid indicates the given pid */
  /* revent EV_CHILD */
  /* does not support priorities */
  typedef struct ev_child
  {
    EV_WATCHER_LIST (ev_child)
  
    int flags;   /* private */
    int pid;     /* ro */
    int rpid;    /* rw, holds the received pid */
    int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
  } ev_child;
  
  #if EV_STAT_ENABLE
  /* st_nlink = 0 means missing file or other error */
  # ifdef _WIN32
  typedef struct _stati64 ev_statdata;
  # else
  typedef struct stat ev_statdata;
  # endif
  
  /* invoked each time the stat data changes for a given path */
  /* revent EV_STAT */
  typedef struct ev_stat
  {
    EV_WATCHER_LIST (ev_stat)
  
    ev_timer timer;     /* private */
    ev_tstamp interval; /* ro */
    const char *path;   /* ro */
    ev_statdata prev;   /* ro */
    ev_statdata attr;   /* ro */
  
    int wd; /* wd for inotify, fd for kqueue */
  } ev_stat;
  #endif
  
  #if EV_IDLE_ENABLE
  /* invoked when the nothing else needs to be done, keeps the process from blocking */
  /* revent EV_IDLE */
  typedef struct ev_idle
  {
    EV_WATCHER (ev_idle)
  } ev_idle;
  #endif
  
  /* invoked for each run of the mainloop, just before the blocking call */
  /* you can still change events in any way you like */
  /* revent EV_PREPARE */
  typedef struct ev_prepare
  {
    EV_WATCHER (ev_prepare)
  } ev_prepare;
  
  /* invoked for each run of the mainloop, just after the blocking call */
  /* revent EV_CHECK */
  typedef struct ev_check
  {
    EV_WATCHER (ev_check)
  } ev_check;
  
  #if EV_FORK_ENABLE
  /* the callback gets invoked before check in the child process when a fork was detected */
  /* revent EV_FORK */
  typedef struct ev_fork
  {
    EV_WATCHER (ev_fork)
  } ev_fork;
  #endif
  
  #if EV_CLEANUP_ENABLE
  /* is invoked just before the loop gets destroyed */
  /* revent EV_CLEANUP */
  typedef struct ev_cleanup
  {
    EV_WATCHER (ev_cleanup)
  } ev_cleanup;
  #endif
  
  #if EV_EMBED_ENABLE
  /* used to embed an event loop inside another */
  /* the callback gets invoked when the event loop has handled events, and can be 0 */
  typedef struct ev_embed
  {
    EV_WATCHER (ev_embed)
  
    struct ev_loop *other; /* ro */
    ev_io io;              /* private */
    ev_prepare prepare;    /* private */
    ev_check check;        /* unused */
    ev_timer timer;        /* unused */
    ev_periodic periodic;  /* unused */
    ev_idle idle;          /* unused */
    ev_fork fork;          /* private */
  #if EV_CLEANUP_ENABLE
    ev_cleanup cleanup;    /* unused */
  #endif
  } ev_embed;
  #endif
  
  #if EV_ASYNC_ENABLE
  /* invoked when somebody calls ev_async_send on the watcher */
  /* revent EV_ASYNC */
  typedef struct ev_async
  {
    EV_WATCHER (ev_async)
  
    EV_ATOMIC_T sent; /* private */
  } ev_async;
  
  # define ev_async_pending(w) (+(w)->sent)
  #endif
  
  /* the presence of this union forces similar struct layout */
  union ev_any_watcher
  {
    struct ev_watcher w;
    struct ev_watcher_list wl;
  
    struct ev_io io;
    struct ev_timer timer;
    struct ev_periodic periodic;
    struct ev_signal signal;
    struct ev_child child;
  #if EV_STAT_ENABLE
    struct ev_stat stat;
  #endif
  #if EV_IDLE_ENABLE
    struct ev_idle idle;
  #endif
    struct ev_prepare prepare;
    struct ev_check check;
  #if EV_FORK_ENABLE
    struct ev_fork fork;
  #endif
  #if EV_CLEANUP_ENABLE
    struct ev_cleanup cleanup;
  #endif
  #if EV_EMBED_ENABLE
    struct ev_embed embed;
  #endif
  #if EV_ASYNC_ENABLE
    struct ev_async async;
  #endif
  };
  
  /* flag bits for ev_default_loop and ev_loop_new */
  enum {
    /* the default */
    EVFLAG_AUTO      = 0x00000000U, /* not quite a mask */
    /* flag bits */
    EVFLAG_NOENV     = 0x01000000U, /* do NOT consult environment */
    EVFLAG_FORKCHECK = 0x02000000U, /* check for a fork in each iteration */
    /* debugging/feature disable */
    EVFLAG_NOINOTIFY = 0x00100000U, /* do not attempt to use inotify */
  #if EV_COMPAT3
    EVFLAG_NOSIGFD   = 0, /* compatibility to pre-3.9 */
  #endif
    EVFLAG_SIGNALFD  = 0x00200000U, /* attempt to use signalfd */
    EVFLAG_NOSIGMASK = 0x00400000U  /* avoid modifying the signal mask */
  };
  
  /* method bits to be ored together */
  enum {
    EVBACKEND_SELECT  = 0x00000001U, /* about anywhere */
    EVBACKEND_POLL    = 0x00000002U, /* !win */
    EVBACKEND_EPOLL   = 0x00000004U, /* linux */
    EVBACKEND_KQUEUE  = 0x00000008U, /* bsd */
    EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */
    EVBACKEND_PORT    = 0x00000020U, /* solaris 10 */
    EVBACKEND_ALL     = 0x0000003FU, /* all known backends */
    EVBACKEND_MASK    = 0x0000FFFFU  /* all future backends */
  };
  
  #if EV_PROTOTYPES
  EV_API_DECL int ev_version_major (void) EV_THROW;
  EV_API_DECL int ev_version_minor (void) EV_THROW;
  
  EV_API_DECL unsigned int ev_supported_backends (void) EV_THROW;
  EV_API_DECL unsigned int ev_recommended_backends (void) EV_THROW;
  EV_API_DECL unsigned int ev_embeddable_backends (void) EV_THROW;
  
  EV_API_DECL ev_tstamp ev_time (void) EV_THROW;
  EV_API_DECL void ev_sleep (ev_tstamp delay) EV_THROW; /* sleep for a while */
  
  /* Sets the allocation function to use, works like realloc.
   * It is used to allocate and free memory.
   * If it returns zero when memory needs to be allocated, the library might abort
   * or take some potentially destructive action.
   * The default is your system realloc function.
   */
  EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW;
  
  /* set the callback function to call on a
   * retryable syscall error
   * (such as failed select, poll, epoll_wait)
   */
  EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW;
  
  #if EV_MULTIPLICITY
  
  /* the default loop is the only one that handles signals and child watchers */
  /* you can call this as often as you like */
  EV_API_DECL struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_THROW;
  
  #ifdef EV_API_STATIC
  EV_API_DECL struct ev_loop *ev_default_loop_ptr;
  #endif
  
  EV_INLINE struct ev_loop *
  ev_default_loop_uc_ (void) EV_THROW
  {
    extern struct ev_loop *ev_default_loop_ptr;
  
    return ev_default_loop_ptr;
  }
  
  EV_INLINE int
  ev_is_default_loop (EV_P) EV_THROW
  {
    return EV_A == EV_DEFAULT_UC;
  }
  
  /* create and destroy alternative loops that don't handle signals */
  EV_API_DECL struct ev_loop *ev_loop_new (unsigned int flags EV_CPP (= 0)) EV_THROW;
  
  EV_API_DECL ev_tstamp ev_now (EV_P) EV_THROW; /* time w.r.t. timers and the eventloop, updated after each poll */
  
  #else
  
  EV_API_DECL int ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_THROW; /* returns true when successful */
  
  EV_API_DECL ev_tstamp ev_rt_now;
  
  EV_INLINE ev_tstamp
  ev_now (void) EV_THROW
  {
    return ev_rt_now;
  }
  
  /* looks weird, but ev_is_default_loop (EV_A) still works if this exists */
  EV_INLINE int
  ev_is_default_loop (void) EV_THROW
  {
    return 1;
  }
  
  #endif /* multiplicity */
  
  /* destroy event loops, also works for the default loop */
  EV_API_DECL void ev_loop_destroy (EV_P);
  
  /* this needs to be called after fork, to duplicate the loop */
  /* when you want to re-use it in the child */
  /* you can call it in either the parent or the child */
  /* you can actually call it at any time, anywhere :) */
  EV_API_DECL void ev_loop_fork (EV_P) EV_THROW;
  
  EV_API_DECL unsigned int ev_backend (EV_P) EV_THROW; /* backend in use by loop */
  
  EV_API_DECL void ev_now_update (EV_P) EV_THROW; /* update event loop time */
  
  #if EV_WALK_ENABLE
  /* walk (almost) all watchers in the loop of a given type, invoking the */
  /* callback on every such watcher. The callback might stop the watcher, */
  /* but do nothing else with the loop */
  EV_API_DECL void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW;
  #endif
  
  #endif /* prototypes */
  
  /* ev_run flags values */
  enum {
    EVRUN_NOWAIT = 1, /* do not block/wait */
    EVRUN_ONCE   = 2  /* block *once* only */
  };
  
  /* ev_break how values */
  enum {
    EVBREAK_CANCEL = 0, /* undo unloop */
    EVBREAK_ONE    = 1, /* unloop once */
    EVBREAK_ALL    = 2  /* unloop all loops */
  };
  
  #if EV_PROTOTYPES
  EV_API_DECL int  ev_run (EV_P_ int flags EV_CPP (= 0));
  EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_THROW; /* break out of the loop */
  
  /*
   * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
   * keeps one reference. if you have a long-running watcher you never unregister that
   * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
   */
  EV_API_DECL void ev_ref   (EV_P) EV_THROW;
  EV_API_DECL void ev_unref (EV_P) EV_THROW;
  
  /*
   * convenience function, wait for a single event, without registering an event watcher
   * if timeout is < 0, do wait indefinitely
   */
  EV_API_DECL void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW;
  
  # if EV_FEATURE_API
  EV_API_DECL unsigned int ev_iteration (EV_P) EV_THROW; /* number of loop iterations */
  EV_API_DECL unsigned int ev_depth     (EV_P) EV_THROW; /* #ev_loop enters - #ev_loop leaves */
  EV_API_DECL void         ev_verify    (EV_P) EV_THROW; /* abort if loop data corrupted */
  
  EV_API_DECL void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW; /* sleep at least this time, default 0 */
  EV_API_DECL void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW; /* sleep at least this time, default 0 */
  
  /* advanced stuff for threading etc. support, see docs */
  EV_API_DECL void ev_set_userdata (EV_P_ void *data) EV_THROW;
  EV_API_DECL void *ev_userdata (EV_P) EV_THROW;
  typedef void (*ev_loop_callback)(EV_P);
  EV_API_DECL void ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW;
  /* C++ doesn't allow the use of the ev_loop_callback typedef here, so we need to spell it out*/
  EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW;
  
  EV_API_DECL unsigned int ev_pending_count (EV_P) EV_THROW; /* number of pending events, if any */
  EV_API_DECL void ev_invoke_pending (EV_P); /* invoke all pending watchers */
  
  /*
   * stop/start the timer handling.
   */
  EV_API_DECL void ev_suspend (EV_P) EV_THROW;
  EV_API_DECL void ev_resume  (EV_P) EV_THROW;
  #endif
  
  #endif
  
  /* these may evaluate ev multiple times, and the other arguments at most once */
  /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
  #define ev_init(ev,cb_) do {			\
    ((ev_watcher *)(void *)(ev))->active  =	\
    ((ev_watcher *)(void *)(ev))->pending = 0;	\
    ev_set_priority ((ev), 0);			\
    ev_set_cb ((ev), cb_);			\
  } while (0)
  
  #define ev_io_set(ev,fd_,events_)            do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)
  #define ev_timer_set(ev,after_,repeat_)      do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0)
  #define ev_periodic_set(ev,ofs_,ival_,rcb_)  do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)
  #define ev_signal_set(ev,signum_)            do { (ev)->signum = (signum_); } while (0)
  #define ev_child_set(ev,pid_,trace_)         do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)
  #define ev_stat_set(ev,path_,interval_)      do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)
  #define ev_idle_set(ev)                      /* nop, yes, this is a serious in-joke */
  #define ev_prepare_set(ev)                   /* nop, yes, this is a serious in-joke */
  #define ev_check_set(ev)                     /* nop, yes, this is a serious in-joke */
  #define ev_embed_set(ev,other_)              do { (ev)->other = (other_); } while (0)
  #define ev_fork_set(ev)                      /* nop, yes, this is a serious in-joke */
  #define ev_cleanup_set(ev)                   /* nop, yes, this is a serious in-joke */
  #define ev_async_set(ev)                     /* nop, yes, this is a serious in-joke */
  
  #define ev_io_init(ev,cb,fd,events)          do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
  #define ev_timer_init(ev,cb,after,repeat)    do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
  #define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)
  #define ev_signal_init(ev,cb,signum)         do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
  #define ev_child_init(ev,cb,pid,trace)       do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)
  #define ev_stat_init(ev,cb,path,interval)    do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)
  #define ev_idle_init(ev,cb)                  do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
  #define ev_prepare_init(ev,cb)               do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
  #define ev_check_init(ev,cb)                 do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
  #define ev_embed_init(ev,cb,other)           do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)
  #define ev_fork_init(ev,cb)                  do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)
  #define ev_cleanup_init(ev,cb)               do { ev_init ((ev), (cb)); ev_cleanup_set ((ev)); } while (0)
  #define ev_async_init(ev,cb)                 do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)
  
  #define ev_is_pending(ev)                    (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
  #define ev_is_active(ev)                     (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
  
  #define ev_cb(ev)                            (ev)->cb /* rw */
  
  #if EV_MINPRI == EV_MAXPRI
  # define ev_priority(ev)                     ((ev), EV_MINPRI)
  # define ev_set_priority(ev,pri)             ((ev), (pri))
  #else
  # define ev_priority(ev)                     (+(((ev_watcher *)(void *)(ev))->priority))
  # define ev_set_priority(ev,pri)             (   (ev_watcher *)(void *)(ev))->priority = (pri)
  #endif
  
  #define ev_periodic_at(ev)                   (+((ev_watcher_time *)(ev))->at)
  
  #ifndef ev_set_cb
  # define ev_set_cb(ev,cb_)                   ev_cb (ev) = (cb_)
  #endif
  
  /* stopping (enabling, adding) a watcher does nothing if it is already running */
  /* stopping (disabling, deleting) a watcher does nothing unless it's already running */
  #if EV_PROTOTYPES
  
  /* feeds an event into a watcher as if the event actually occurred */
  /* accepts any ev_watcher type */
  EV_API_DECL void ev_feed_event     (EV_P_ void *w, int revents) EV_THROW;
  EV_API_DECL void ev_feed_fd_event  (EV_P_ int fd, int revents) EV_THROW;
  #if EV_SIGNAL_ENABLE
  EV_API_DECL void ev_feed_signal    (int signum) EV_THROW;
  EV_API_DECL void ev_feed_signal_event (EV_P_ int signum) EV_THROW;
  #endif
  EV_API_DECL void ev_invoke         (EV_P_ void *w, int revents);
  EV_API_DECL int  ev_clear_pending  (EV_P_ void *w) EV_THROW;
  
  EV_API_DECL void ev_io_start       (EV_P_ ev_io *w) EV_THROW;
  EV_API_DECL void ev_io_stop        (EV_P_ ev_io *w) EV_THROW;
  
  EV_API_DECL void ev_timer_start    (EV_P_ ev_timer *w) EV_THROW;
  EV_API_DECL void ev_timer_stop     (EV_P_ ev_timer *w) EV_THROW;
  /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
  EV_API_DECL void ev_timer_again    (EV_P_ ev_timer *w) EV_THROW;
  /* return remaining time */
  EV_API_DECL ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW;
  
  #if EV_PERIODIC_ENABLE
  EV_API_DECL void ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW;
  EV_API_DECL void ev_periodic_stop  (EV_P_ ev_periodic *w) EV_THROW;
  EV_API_DECL void ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW;
  #endif
  
  /* only supported in the default loop */
  #if EV_SIGNAL_ENABLE
  EV_API_DECL void ev_signal_start   (EV_P_ ev_signal *w) EV_THROW;
  EV_API_DECL void ev_signal_stop    (EV_P_ ev_signal *w) EV_THROW;
  #endif
  
  /* only supported in the default loop */
  # if EV_CHILD_ENABLE
  EV_API_DECL void ev_child_start    (EV_P_ ev_child *w) EV_THROW;
  EV_API_DECL void ev_child_stop     (EV_P_ ev_child *w) EV_THROW;
  # endif
  
  # if EV_STAT_ENABLE
  EV_API_DECL void ev_stat_start     (EV_P_ ev_stat *w) EV_THROW;
  EV_API_DECL void ev_stat_stop      (EV_P_ ev_stat *w) EV_THROW;
  EV_API_DECL void ev_stat_stat      (EV_P_ ev_stat *w) EV_THROW;
  # endif
  
  # if EV_IDLE_ENABLE
  EV_API_DECL void ev_idle_start     (EV_P_ ev_idle *w) EV_THROW;
  EV_API_DECL void ev_idle_stop      (EV_P_ ev_idle *w) EV_THROW;
  # endif
  
  #if EV_PREPARE_ENABLE
  EV_API_DECL void ev_prepare_start  (EV_P_ ev_prepare *w) EV_THROW;
  EV_API_DECL void ev_prepare_stop   (EV_P_ ev_prepare *w) EV_THROW;
  #endif
  
  #if EV_CHECK_ENABLE
  EV_API_DECL void ev_check_start    (EV_P_ ev_check *w) EV_THROW;
  EV_API_DECL void ev_check_stop     (EV_P_ ev_check *w) EV_THROW;
  #endif
  
  # if EV_FORK_ENABLE
  EV_API_DECL void ev_fork_start     (EV_P_ ev_fork *w) EV_THROW;
  EV_API_DECL void ev_fork_stop      (EV_P_ ev_fork *w) EV_THROW;
  # endif
  
  # if EV_CLEANUP_ENABLE
  EV_API_DECL void ev_cleanup_start  (EV_P_ ev_cleanup *w) EV_THROW;
  EV_API_DECL void ev_cleanup_stop   (EV_P_ ev_cleanup *w) EV_THROW;
  # endif
  
  # if EV_EMBED_ENABLE
  /* only supported when loop to be embedded is in fact embeddable */
  EV_API_DECL void ev_embed_start    (EV_P_ ev_embed *w) EV_THROW;
  EV_API_DECL void ev_embed_stop     (EV_P_ ev_embed *w) EV_THROW;
  EV_API_DECL void ev_embed_sweep    (EV_P_ ev_embed *w) EV_THROW;
  # endif
  
  # if EV_ASYNC_ENABLE
  EV_API_DECL void ev_async_start    (EV_P_ ev_async *w) EV_THROW;
  EV_API_DECL void ev_async_stop     (EV_P_ ev_async *w) EV_THROW;
  EV_API_DECL void ev_async_send     (EV_P_ ev_async *w) EV_THROW;
  # endif
  
  #if EV_COMPAT3
    #define EVLOOP_NONBLOCK EVRUN_NOWAIT
    #define EVLOOP_ONESHOT  EVRUN_ONCE
    #define EVUNLOOP_CANCEL EVBREAK_CANCEL
    #define EVUNLOOP_ONE    EVBREAK_ONE
    #define EVUNLOOP_ALL    EVBREAK_ALL
    #if EV_PROTOTYPES
      EV_INLINE void ev_loop   (EV_P_ int flags) { ev_run   (EV_A_ flags); }
      EV_INLINE void ev_unloop (EV_P_ int how  ) { ev_break (EV_A_ how  ); }
      EV_INLINE void ev_default_destroy (void) { ev_loop_destroy (EV_DEFAULT); }
      EV_INLINE void ev_default_fork    (void) { ev_loop_fork    (EV_DEFAULT); }
      #if EV_FEATURE_API
        EV_INLINE unsigned int ev_loop_count  (EV_P) { return ev_iteration  (EV_A); }
        EV_INLINE unsigned int ev_loop_depth  (EV_P) { return ev_depth      (EV_A); }
        EV_INLINE void         ev_loop_verify (EV_P) {        ev_verify     (EV_A); }
      #endif
    #endif
  #else
    typedef struct ev_loop ev_loop;
  #endif
  
  #endif
  
  EV_CPP(})
  
  #endif
  
  