/src/libev/ev++.h
http://github.com/jacksonh/manos · C Header · 816 lines · 647 code · 118 blank · 51 comment · 27 complexity · a474fd03bb0168af4fa2640ff5f4f9a2 MD5 · raw file
- /*
- * libev simple C++ wrapper classes
- *
- * Copyright (c) 2007,2008,2010 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 EVPP_H__
- #define EVPP_H__
- #ifdef EV_H
- # include EV_H
- #else
- # include "ev.h"
- #endif
- #ifndef EV_USE_STDEXCEPT
- # define EV_USE_STDEXCEPT 1
- #endif
- #if EV_USE_STDEXCEPT
- # include <stdexcept>
- #endif
- namespace ev {
- typedef ev_tstamp tstamp;
- enum {
- UNDEF = EV_UNDEF,
- NONE = EV_NONE,
- READ = EV_READ,
- WRITE = EV_WRITE,
- #if EV_COMPAT3
- TIMEOUT = EV_TIMEOUT,
- #endif
- TIMER = EV_TIMER,
- PERIODIC = EV_PERIODIC,
- SIGNAL = EV_SIGNAL,
- CHILD = EV_CHILD,
- STAT = EV_STAT,
- IDLE = EV_IDLE,
- CHECK = EV_CHECK,
- PREPARE = EV_PREPARE,
- FORK = EV_FORK,
- ASYNC = EV_ASYNC,
- EMBED = EV_EMBED,
- # undef ERROR // some systems stupidly #define ERROR
- ERROR = EV_ERROR
- };
- enum
- {
- AUTO = EVFLAG_AUTO,
- NOENV = EVFLAG_NOENV,
- FORKCHECK = EVFLAG_FORKCHECK,
- SELECT = EVBACKEND_SELECT,
- POLL = EVBACKEND_POLL,
- EPOLL = EVBACKEND_EPOLL,
- KQUEUE = EVBACKEND_KQUEUE,
- DEVPOLL = EVBACKEND_DEVPOLL,
- PORT = EVBACKEND_PORT
- };
- enum
- {
- #if EV_COMPAT3
- NONBLOCK = EVLOOP_NONBLOCK,
- ONESHOT = EVLOOP_ONESHOT,
- #endif
- NOWAIT = EVRUN_NOWAIT,
- ONCE = EVRUN_ONCE
- };
- enum how_t
- {
- ONE = EVBREAK_ONE,
- ALL = EVBREAK_ALL
- };
- struct bad_loop
- #if EV_USE_STDEXCEPT
- : std::runtime_error
- #endif
- {
- #if EV_USE_STDEXCEPT
- bad_loop ()
- : std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
- {
- }
- #endif
- };
- #ifdef EV_AX
- # undef EV_AX
- #endif
- #ifdef EV_AX_
- # undef EV_AX_
- #endif
- #if EV_MULTIPLICITY
- # define EV_AX raw_loop
- # define EV_AX_ raw_loop,
- #else
- # define EV_AX
- # define EV_AX_
- #endif
- struct loop_ref
- {
- loop_ref (EV_P) throw ()
- #if EV_MULTIPLICITY
- : EV_AX (EV_A)
- #endif
- {
- }
- bool operator == (const loop_ref &other) const throw ()
- {
- #if EV_MULTIPLICITY
- return EV_AX == other.EV_AX;
- #else
- return true;
- #endif
- }
- bool operator != (const loop_ref &other) const throw ()
- {
- #if EV_MULTIPLICITY
- return ! (*this == other);
- #else
- return false;
- #endif
- }
- #if EV_MULTIPLICITY
- bool operator == (const EV_P) const throw ()
- {
- return this->EV_AX == EV_A;
- }
- bool operator != (const EV_P) const throw ()
- {
- return (*this == EV_A);
- }
- operator struct ev_loop * () const throw ()
- {
- return EV_AX;
- }
- operator const struct ev_loop * () const throw ()
- {
- return EV_AX;
- }
- bool is_default () const throw ()
- {
- return EV_AX == ev_default_loop (0);
- }
- #endif
- #if EV_COMPAT3
- void loop (int flags = 0)
- {
- ev_run (EV_AX_ flags);
- }
- void unloop (how_t how = ONE) throw ()
- {
- ev_break (EV_AX_ how);
- }
- #endif
- void run (int flags = 0)
- {
- ev_run (EV_AX_ flags);
- }
- void break_loop (how_t how = ONE) throw ()
- {
- ev_break (EV_AX_ how);
- }
- void post_fork () throw ()
- {
- ev_loop_fork (EV_AX);
- }
- unsigned int backend () const throw ()
- {
- return ev_backend (EV_AX);
- }
- tstamp now () const throw ()
- {
- return ev_now (EV_AX);
- }
- void ref () throw ()
- {
- ev_ref (EV_AX);
- }
- void unref () throw ()
- {
- ev_unref (EV_AX);
- }
- #if EV_FEATURE_API
- unsigned int iteration () const throw ()
- {
- return ev_iteration (EV_AX);
- }
- unsigned int depth () const throw ()
- {
- return ev_depth (EV_AX);
- }
- void set_io_collect_interval (tstamp interval) throw ()
- {
- ev_set_io_collect_interval (EV_AX_ interval);
- }
- void set_timeout_collect_interval (tstamp interval) throw ()
- {
- ev_set_timeout_collect_interval (EV_AX_ interval);
- }
- #endif
- // function callback
- void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void *arg = 0) throw ()
- {
- ev_once (EV_AX_ fd, events, timeout, cb, arg);
- }
- // method callback
- template<class K, void (K::*method)(int)>
- void once (int fd, int events, tstamp timeout, K *object) throw ()
- {
- once (fd, events, timeout, method_thunk<K, method>, object);
- }
- // default method == operator ()
- template<class K>
- void once (int fd, int events, tstamp timeout, K *object) throw ()
- {
- once (fd, events, timeout, method_thunk<K, &K::operator ()>, object);
- }
- template<class K, void (K::*method)(int)>
- static void method_thunk (int revents, void *arg)
- {
- static_cast<K *>(arg)->*method
- (revents);
- }
- // no-argument method callback
- template<class K, void (K::*method)()>
- void once (int fd, int events, tstamp timeout, K *object) throw ()
- {
- once (fd, events, timeout, method_noargs_thunk<K, method>, object);
- }
- template<class K, void (K::*method)()>
- static void method_noargs_thunk (int revents, void *arg)
- {
- static_cast<K *>(arg)->*method
- ();
- }
- // simpler function callback
- template<void (*cb)(int)>
- void once (int fd, int events, tstamp timeout) throw ()
- {
- once (fd, events, timeout, simpler_func_thunk<cb>);
- }
- template<void (*cb)(int)>
- static void simpler_func_thunk (int revents, void *arg)
- {
- (*cb)
- (revents);
- }
- // simplest function callback
- template<void (*cb)()>
- void once (int fd, int events, tstamp timeout) throw ()
- {
- once (fd, events, timeout, simplest_func_thunk<cb>);
- }
- template<void (*cb)()>
- static void simplest_func_thunk (int revents, void *arg)
- {
- (*cb)
- ();
- }
- void feed_fd_event (int fd, int revents) throw ()
- {
- ev_feed_fd_event (EV_AX_ fd, revents);
- }
- void feed_signal_event (int signum) throw ()
- {
- ev_feed_signal_event (EV_AX_ signum);
- }
- #if EV_MULTIPLICITY
- struct ev_loop* EV_AX;
- #endif
- };
- #if EV_MULTIPLICITY
- struct dynamic_loop : loop_ref
- {
- dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
- : loop_ref (ev_loop_new (flags))
- {
- if (!EV_AX)
- throw bad_loop ();
- }
- ~dynamic_loop () throw ()
- {
- ev_loop_destroy (EV_AX);
- EV_AX = 0;
- }
- private:
- dynamic_loop (const dynamic_loop &);
- dynamic_loop & operator= (const dynamic_loop &);
- };
- #endif
- struct default_loop : loop_ref
- {
- default_loop (unsigned int flags = AUTO) throw (bad_loop)
- #if EV_MULTIPLICITY
- : loop_ref (ev_default_loop (flags))
- #endif
- {
- if (
- #if EV_MULTIPLICITY
- !EV_AX
- #else
- !ev_default_loop (flags)
- #endif
- )
- throw bad_loop ();
- }
- private:
- default_loop (const default_loop &);
- default_loop &operator = (const default_loop &);
- };
- inline loop_ref get_default_loop () throw ()
- {
- #if EV_MULTIPLICITY
- return ev_default_loop (0);
- #else
- return loop_ref ();
- #endif
- }
- #undef EV_AX
- #undef EV_AX_
- #undef EV_PX
- #undef EV_PX_
- #if EV_MULTIPLICITY
- # define EV_PX loop_ref EV_A
- # define EV_PX_ loop_ref EV_A_
- #else
- # define EV_PX
- # define EV_PX_
- #endif
- template<class ev_watcher, class watcher>
- struct base : ev_watcher
- {
- #if EV_MULTIPLICITY
- EV_PX;
- // loop set
- void set (EV_P) throw ()
- {
- this->EV_A = EV_A;
- }
- #endif
- base (EV_PX) throw ()
- #if EV_MULTIPLICITY
- : EV_A (EV_A)
- #endif
- {
- ev_init (this, 0);
- }
- void set_ (const void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
- {
- this->data = (void *)data;
- ev_set_cb (static_cast<ev_watcher *>(this), cb);
- }
- // function callback
- template<void (*function)(watcher &w, int)>
- void set (void *data = 0) throw ()
- {
- set_ (data, function_thunk<function>);
- }
- template<void (*function)(watcher &w, int)>
- static void function_thunk (EV_P_ ev_watcher *w, int revents)
- {
- function
- (*static_cast<watcher *>(w), revents);
- }
- // method callback
- template<class K, void (K::*method)(watcher &w, int)>
- void set (K *object) throw ()
- {
- set_ (object, method_thunk<K, method>);
- }
- // default method == operator ()
- template<class K>
- void set (K *object) throw ()
- {
- set_ (object, method_thunk<K, &K::operator ()>);
- }
- template<class K, void (K::*method)(watcher &w, int)>
- static void method_thunk (EV_P_ ev_watcher *w, int revents)
- {
- (static_cast<K *>(w->data)->*method)
- (*static_cast<watcher *>(w), revents);
- }
- // no-argument callback
- template<class K, void (K::*method)()>
- void set (K *object) throw ()
- {
- set_ (object, method_noargs_thunk<K, method>);
- }
- template<class K, void (K::*method)()>
- static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
- {
- (static_cast<K *>(w->data)->*method)
- ();
- }
- void operator ()(int events = EV_UNDEF)
- {
- return
- ev_cb (static_cast<ev_watcher *>(this))
- (static_cast<ev_watcher *>(this), events);
- }
- bool is_active () const throw ()
- {
- return ev_is_active (static_cast<const ev_watcher *>(this));
- }
- bool is_pending () const throw ()
- {
- return ev_is_pending (static_cast<const ev_watcher *>(this));
- }
- void feed_event (int revents) throw ()
- {
- ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
- }
- };
- inline tstamp now () throw ()
- {
- return ev_time ();
- }
- inline void delay (tstamp interval) throw ()
- {
- ev_sleep (interval);
- }
- inline int version_major () throw ()
- {
- return ev_version_major ();
- }
- inline int version_minor () throw ()
- {
- return ev_version_minor ();
- }
- inline unsigned int supported_backends () throw ()
- {
- return ev_supported_backends ();
- }
- inline unsigned int recommended_backends () throw ()
- {
- return ev_recommended_backends ();
- }
- inline unsigned int embeddable_backends () throw ()
- {
- return ev_embeddable_backends ();
- }
- inline void set_allocator (void *(*cb)(void *ptr, long size)) throw ()
- {
- ev_set_allocator (cb);
- }
- inline void set_syserr_cb (void (*cb)(const char *msg)) throw ()
- {
- ev_set_syserr_cb (cb);
- }
- #if EV_MULTIPLICITY
- #define EV_CONSTRUCT(cppstem,cstem) \
- (EV_PX = get_default_loop ()) throw () \
- : base<ev_ ## cstem, cppstem> (EV_A) \
- { \
- }
- #else
- #define EV_CONSTRUCT(cppstem,cstem) \
- () throw () \
- { \
- }
- #endif
- /* using a template here would require quite a bit more lines,
- * so a macro solution was chosen */
- #define EV_BEGIN_WATCHER(cppstem,cstem) \
- \
- struct cppstem : base<ev_ ## cstem, cppstem> \
- { \
- void start () throw () \
- { \
- ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
- } \
- \
- void stop () throw () \
- { \
- ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
- } \
- \
- cppstem EV_CONSTRUCT(cppstem,cstem) \
- \
- ~cppstem () throw () \
- { \
- stop (); \
- } \
- \
- using base<ev_ ## cstem, cppstem>::set; \
- \
- private: \
- \
- cppstem (const cppstem &o); \
- \
- cppstem &operator =(const cppstem &o); \
- \
- public:
- #define EV_END_WATCHER(cppstem,cstem) \
- };
- EV_BEGIN_WATCHER (io, io)
- void set (int fd, int events) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_io_set (static_cast<ev_io *>(this), fd, events);
- if (active) start ();
- }
- void set (int events) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_io_set (static_cast<ev_io *>(this), fd, events);
- if (active) start ();
- }
- void start (int fd, int events) throw ()
- {
- set (fd, events);
- start ();
- }
- EV_END_WATCHER (io, io)
- EV_BEGIN_WATCHER (timer, timer)
- void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
- if (active) start ();
- }
- void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
- {
- set (after, repeat);
- start ();
- }
- void again () throw ()
- {
- ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
- }
- ev_tstamp remaining ()
- {
- return ev_timer_remaining (EV_A_ static_cast<ev_timer *>(this));
- }
- EV_END_WATCHER (timer, timer)
- #if EV_PERIODIC_ENABLE
- EV_BEGIN_WATCHER (periodic, periodic)
- void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
- if (active) start ();
- }
- void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
- {
- set (at, interval);
- start ();
- }
- void again () throw ()
- {
- ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
- }
- EV_END_WATCHER (periodic, periodic)
- #endif
- #if EV_SIGNAL_ENABLE
- EV_BEGIN_WATCHER (sig, signal)
- void set (int signum) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_signal_set (static_cast<ev_signal *>(this), signum);
- if (active) start ();
- }
- void start (int signum) throw ()
- {
- set (signum);
- start ();
- }
- EV_END_WATCHER (sig, signal)
- #endif
- #if EV_CHILD_ENABLE
- EV_BEGIN_WATCHER (child, child)
- void set (int pid, int trace = 0) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_child_set (static_cast<ev_child *>(this), pid, trace);
- if (active) start ();
- }
- void start (int pid, int trace = 0) throw ()
- {
- set (pid, trace);
- start ();
- }
- EV_END_WATCHER (child, child)
- #endif
- #if EV_STAT_ENABLE
- EV_BEGIN_WATCHER (stat, stat)
- void set (const char *path, ev_tstamp interval = 0.) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_stat_set (static_cast<ev_stat *>(this), path, interval);
- if (active) start ();
- }
- void start (const char *path, ev_tstamp interval = 0.) throw ()
- {
- stop ();
- set (path, interval);
- start ();
- }
- void update () throw ()
- {
- ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
- }
- EV_END_WATCHER (stat, stat)
- #endif
- #if EV_IDLE_ENABLE
- EV_BEGIN_WATCHER (idle, idle)
- void set () throw () { }
- EV_END_WATCHER (idle, idle)
- #endif
- #if EV_PREPARE_ENABLE
- EV_BEGIN_WATCHER (prepare, prepare)
- void set () throw () { }
- EV_END_WATCHER (prepare, prepare)
- #endif
- #if EV_CHECK_ENABLE
- EV_BEGIN_WATCHER (check, check)
- void set () throw () { }
- EV_END_WATCHER (check, check)
- #endif
- #if EV_EMBED_ENABLE
- EV_BEGIN_WATCHER (embed, embed)
- void set (struct ev_loop *embedded_loop) throw ()
- {
- int active = is_active ();
- if (active) stop ();
- ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
- if (active) start ();
- }
- void start (struct ev_loop *embedded_loop) throw ()
- {
- set (embedded_loop);
- start ();
- }
- void sweep ()
- {
- ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
- }
- EV_END_WATCHER (embed, embed)
- #endif
- #if EV_FORK_ENABLE
- EV_BEGIN_WATCHER (fork, fork)
- void set () throw () { }
- EV_END_WATCHER (fork, fork)
- #endif
- #if EV_ASYNC_ENABLE
- EV_BEGIN_WATCHER (async, async)
- void send () throw ()
- {
- ev_async_send (EV_A_ static_cast<ev_async *>(this));
- }
- bool async_pending () throw ()
- {
- return ev_async_pending (static_cast<ev_async *>(this));
- }
- EV_END_WATCHER (async, async)
- #endif
- #undef EV_PX
- #undef EV_PX_
- #undef EV_CONSTRUCT
- #undef EV_BEGIN_WATCHER
- #undef EV_END_WATCHER
- }
- #endif