--- libev/ev++.h 2007/11/24 09:48:37 1.7 +++ libev/ev++.h 2008/01/22 17:57:17 1.35 @@ -1,48 +1,62 @@ +/* + * libev simple C++ wrapper classes + * + * Copyright (c) 2007 Marc Alexander Lehmann + * 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__ -#include "ev.h" - -namespace ev { - - template - class callback - { - struct object { }; - - void *obj; - void (object::*meth)(watcher &, int); +#ifdef EV_H +# include EV_H +#else +# include "ev.h" +#endif - /* a proxy is a kind of recipe on how to call a specific class method */ - struct proxy_base { - virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int) const = 0; - }; - template - struct proxy : proxy_base { - virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int e) const - { - ((reinterpret_cast(obj)) ->* (reinterpret_cast(meth))) - (w, e); - } - }; +#ifndef EV_USE_STDEXCEPT +# define EV_USE_STDEXCEPT 1 +#endif - proxy_base *prxy; +#if EV_USE_STDEXCEPT +# include +#endif - public: - template - explicit callback (O1 *object, void (O2::*method)(watcher &, int)) - { - static proxy p; - obj = reinterpret_cast(object); - meth = reinterpret_cast(method); - prxy = &p; - } +namespace ev { - void call (watcher *w, int e) const - { - return prxy->call (obj, meth, *w, e); - } - }; + typedef ev_tstamp tstamp; enum { UNDEF = EV_UNDEF, @@ -52,96 +66,546 @@ TIMEOUT = EV_TIMEOUT, PERIODIC = EV_PERIODIC, SIGNAL = EV_SIGNAL, + CHILD = EV_CHILD, + STAT = EV_STAT, IDLE = EV_IDLE, CHECK = EV_CHECK, PREPARE = EV_PREPARE, - CHILD = EV_CHILD, + FORK = EV_FORK, + EMBED = EV_EMBED, ERROR = EV_ERROR, }; - typedef ev_tstamp tstamp; + 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 + { + NONBLOCK = EVLOOP_NONBLOCK, + ONESHOT = EVLOOP_ONESHOT + }; + + enum how_t + { + ONE = EVUNLOOP_ONE, + ALL = EVUNLOOP_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) +#if EV_MULTIPLICITY + throw (bad_loop) : EV_AX (EV_A) + { + if (!EV_AX) + throw bad_loop (); + } +#else + throw () + { + } +#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== (struct ev_loop *other) const throw () + { + return this->EV_AX == other; + } + + bool operator!= (struct ev_loop *other) const throw () + { + return ! (*this == other); + } + + bool operator== (const struct ev_loop *other) const throw () + { + return this->EV_AX == other; + } + + bool operator!= (const struct ev_loop *other) const throw () + { + return (*this == other); + } + + 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 + + void loop (int flags = 0) + { + ev_loop (EV_AX_ flags); + } + + void unloop (how_t how = ONE) throw () + { + ev_unloop (EV_AX_ how); + } + + void post_fork () throw () + { +#if EV_MULTIPLICITY + ev_loop_fork (EV_AX); +#else + ev_default_fork (); +#endif + } + + unsigned int count () const throw () + { + return ev_loop_count (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); + } + + 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); + } + + // 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 + void once (int fd, int events, tstamp timeout, K *object) throw () + { + once (fd, events, timeout, method_thunk, object); + } + + template + static void method_thunk (int revents, void* arg) + { + K *obj = static_cast(arg); + (obj->*method) (revents); + } + + // const method callback + template + void once (int fd, int events, tstamp timeout, const K *object) throw () + { + once (fd, events, timeout, const_method_thunk, object); + } + + template + static void const_method_thunk (int revents, void* arg) + { + K *obj = static_cast(arg); + (obj->*method) (revents); + } + + // simple method callback + template + void once (int fd, int events, tstamp timeout, K *object) throw () + { + once (fd, events, timeout, method_noargs_thunk, object); + } + + template + static void method_noargs_thunk (int revents, void* arg) + { + K *obj = static_cast(arg); + (obj->*method) (); + } + + // simpler function callback + template + void once (int fd, int events, tstamp timeout) throw () + { + once (fd, events, timeout, simpler_func_thunk); + } + + template + static void simpler_func_thunk (int revents, void* arg) + { + (*cb) (revents); + } + + // simplest function callback + template + void once (int fd, int events, tstamp timeout) throw () + { + once (fd, events, timeout, simplest_func_thunk); + } + + template + 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 + { - inline ev_tstamp now (EV_P) + dynamic_loop (unsigned int flags = AUTO) throw (bad_loop) + : loop_ref (ev_loop_new (flags)) + { + } + + ~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 !EV_MULTIPLICITY + if (!ev_default_loop (flags)) + throw bad_loop (); +#endif + } + + ~default_loop () throw () + { + ev_default_destroy (); + } + + private: + default_loop (const default_loop &); + default_loop &operator = (const default_loop &); + }; + + inline loop_ref get_default_loop () throw () { - return ev_now (EV_A); +#if EV_MULTIPLICITY + return ev_default_loop (0); +#else + return loop_ref (); +#endif } - #if EV_MULTIPLICITY +#undef EV_AX +#undef EV_AX_ - #define EV_CONSTRUCT(cppstem) \ - EV_P; \ - \ - void set (EV_P) \ - { \ - this->EV_A = EV_A; \ - } \ - \ - template \ - explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \ - : callback (object, method), EV_A (EV_A) +#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 - #else + template + struct base : ev_watcher + { + #if EV_MULTIPLICITY + EV_PX; + + void set (EV_PX) throw () + { + this->EV_A = EV_A; + } + #endif - #define EV_CONSTRUCT(cppstem) \ - template \ - explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ - : callback (object, method) + base (EV_PX) throw () + #if EV_MULTIPLICITY + : EV_A (EV_A) + #endif + { + ev_init (this, 0); + } + + void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw () + { + this->data = data; + ev_set_cb (static_cast(this), cb); + } + // method callback + template + void set (K *object) throw () + { + set_ (object, method_thunk); + } + + template + static void method_thunk (EV_P_ ev_watcher *w, int revents) + { + K *obj = static_cast(w->data); + (obj->*method) (*static_cast(w), revents); + } + + // const method callback + template + void set (const K *object) throw () + { + set_ (object, const_method_thunk); + } + + template + static void const_method_thunk (EV_P_ ev_watcher *w, int revents) + { + K *obj = static_cast(w->data); + (static_cast(w->data)->*method) (*static_cast(w), revents); + } + + // function callback + template + void set (void *data = 0) throw () + { + set_ (data, function_thunk); + } + + template + static void function_thunk (EV_P_ ev_watcher *w, int revents) + { + function (*static_cast(w), revents); + } + + // simple callback + template + void set (K *object) throw () + { + set_ (object, method_noargs_thunk); + } + + template + static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents) + { + K *obj = static_cast(w->data); + (obj->*method) (); + } + + void operator ()(int events = EV_UNDEF) + { + return ev_cb (static_cast(this)) + (static_cast(this), events); + } + + bool is_active () const throw () + { + return ev_is_active (static_cast(this)); + } + + bool is_pending () const throw () + { + return ev_is_pending (static_cast(this)); + } + + void feed_event (int revents) throw () + { + ev_feed_event (EV_A_ static_cast(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_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 : ev_ ## cstem, callback \ + struct cppstem : base \ { \ - EV_CONSTRUCT (cppstem) \ - { \ - ev_init (static_cast(this), thunk); \ - } \ - \ - bool is_active () const \ - { \ - return ev_is_active (static_cast(this)); \ - } \ - \ - bool is_pending () const \ - { \ - return ev_is_pending (static_cast(this)); \ - } \ - \ - void start () \ + void start () throw () \ { \ ev_ ## cstem ## _start (EV_A_ static_cast(this)); \ } \ \ - void stop () \ + void stop () throw () \ { \ ev_ ## cstem ## _stop (EV_A_ static_cast(this)); \ } \ \ - void operator ()(int events = EV_UNDEF) \ - { \ - return call (this, events); \ - } \ + cppstem EV_CONSTRUCT(cppstem,cstem) \ \ - ~cppstem () \ + ~cppstem () throw () \ { \ stop (); \ } \ \ - private: \ + using base::set; \ \ - cppstem (const cppstem &o) \ - : callback (this, (void (cppstem::*)(cppstem &, int))0) \ - { /* disabled */ } \ + private: \ \ - void operator =(const cppstem &o) { /* disabled */ } \ + cppstem (const cppstem &o); \ \ - static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \ - { \ - (*static_cast(w))(revents); \ - } \ + cppstem & operator =(const cppstem &o); \ \ public: @@ -149,7 +613,7 @@ }; EV_BEGIN_WATCHER (io, io) - void set (int fd, int events) + void set (int fd, int events) throw () { int active = is_active (); if (active) stop (); @@ -157,7 +621,7 @@ if (active) start (); } - void set (int events) + void set (int events) throw () { int active = is_active (); if (active) stop (); @@ -165,7 +629,7 @@ if (active) start (); } - void start (int fd, int events) + void start (int fd, int events) throw () { set (fd, events); start (); @@ -173,7 +637,7 @@ EV_END_WATCHER (io, io) EV_BEGIN_WATCHER (timer, timer) - void set (ev_tstamp after, ev_tstamp repeat = 0.) + void set (ev_tstamp after, ev_tstamp repeat = 0.) throw () { int active = is_active (); if (active) stop (); @@ -181,21 +645,21 @@ if (active) start (); } - void start (ev_tstamp after, ev_tstamp repeat = 0.) + void start (ev_tstamp after, ev_tstamp repeat = 0.) throw () { set (after, repeat); start (); } - void again () + void again () throw () { ev_timer_again (EV_A_ static_cast(this)); } EV_END_WATCHER (timer, timer) - #if EV_PERIODICS + #if EV_PERIODIC_ENABLE EV_BEGIN_WATCHER (periodic, periodic) - void set (ev_tstamp at, ev_tstamp interval = 0.) + void set (ev_tstamp at, ev_tstamp interval = 0.) throw () { int active = is_active (); if (active) stop (); @@ -203,33 +667,21 @@ if (active) start (); } - void start (ev_tstamp at, ev_tstamp interval = 0.) + void start (ev_tstamp at, ev_tstamp interval = 0.) throw () { set (at, interval); start (); } - void again () + void again () throw () { ev_periodic_again (EV_A_ static_cast(this)); } EV_END_WATCHER (periodic, periodic) #endif - EV_BEGIN_WATCHER (idle, idle) - void set () { } - EV_END_WATCHER (idle, idle) - - EV_BEGIN_WATCHER (prepare, prepare) - void set () { } - EV_END_WATCHER (prepare, prepare) - - EV_BEGIN_WATCHER (check, check) - void set () { } - EV_END_WATCHER (check, check) - EV_BEGIN_WATCHER (sig, signal) - void set (int signum) + void set (int signum) throw () { int active = is_active (); if (active) stop (); @@ -237,7 +689,7 @@ if (active) start (); } - void start (int signum) + void start (int signum) throw () { set (signum); start (); @@ -245,7 +697,7 @@ EV_END_WATCHER (sig, signal) EV_BEGIN_WATCHER (child, child) - void set (int pid) + void set (int pid) throw () { int active = is_active (); if (active) stop (); @@ -253,27 +705,55 @@ if (active) start (); } - void start (int pid) + void start (int pid) throw () { set (pid); start (); } EV_END_WATCHER (child, child) - #if EV_MULTIPLICITY - - EV_BEGIN_WATCHER (embed, embed) - void set (struct ev_loop *loop) + #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_embed_set (static_cast(this), loop); + ev_stat_set (static_cast(this), path, interval); if (active) start (); } - void start (struct ev_loop *embedded_loop) + void start (const char *path, ev_tstamp interval = 0.) throw () { - set (embedded_loop); + stop (); + set (path, interval); + start (); + } + + void update () throw () + { + ev_stat_stat (EV_A_ static_cast(this)); + } + EV_END_WATCHER (stat, stat) + #endif + + EV_BEGIN_WATCHER (idle, idle) + void set () throw () { } + EV_END_WATCHER (idle, idle) + + EV_BEGIN_WATCHER (prepare, prepare) + void set () throw () { } + EV_END_WATCHER (prepare, prepare) + + EV_BEGIN_WATCHER (check, check) + void set () throw () { } + EV_END_WATCHER (check, check) + + #if EV_EMBED_ENABLE + EV_BEGIN_WATCHER (embed, embed) + void start (struct ev_loop *embedded_loop) throw () + { + stop (); + ev_embed_set (static_cast(this), embedded_loop); start (); } @@ -282,12 +762,20 @@ ev_embed_sweep (EV_A_ static_cast(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 + #undef EV_PX + #undef EV_PX_ #undef EV_CONSTRUCT #undef EV_BEGIN_WATCHER #undef EV_END_WATCHER + } #endif