+/*
+ * libev simple C++ wrapper classes
+ *
+ * Copyright (c) 2007 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__
-#include "ev.h"
-
-namespace ev {
+#ifdef EV_H
+# include EV_H
+#else
+# include "ev.h"
+#endif
- template<class watcher>
- class callback
- {
- struct object { };
-
- void *obj;
- void (object::*meth)(watcher &, int);
-
- /* 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<class O1, class O2>
- struct proxy : proxy_base {
- virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int e) const
- {
- ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth)))
- (w, e);
- }
- };
+#ifndef EV_USE_STDEXCEPT
+# define EV_USE_STDEXCEPT 1
+#endif
- proxy_base *prxy;
+#if EV_USE_STDEXCEPT
+# include <stdexcept>
+#endif
- public:
- template<class O1, class O2>
- explicit callback (O1 *object, void (O2::*method)(watcher &, int))
- {
- static proxy<O1,O2> p;
- obj = reinterpret_cast<void *>(object);
- meth = reinterpret_cast<void (object::*)(watcher &, int)>(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,
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) throw (bad_loop)
+#if EV_MULTIPLICITY
+ : EV_AX (EV_A)
+#endif
+ {
+#if EV_MULTIPLICITY
+ if (!EV_AX)
+ throw bad_loop ();
+#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<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);
+ }
+
+ template<class K, void (K::*method)(int)>
+ static void method_thunk (int revents, void* arg)
+ {
+ K *obj = static_cast<K *>(arg);
+ (obj->*method) (revents);
+ }
+
+ // const method callback
+ template<class K, void (K::*method)(int) const>
+ void once (int fd, int events, tstamp timeout, const K *object) throw ()
+ {
+ once (fd, events, timeout, const_method_thunk<K, method>, object);
+ }
+
+ template<class K, void (K::*method)(int) const>
+ static void const_method_thunk (int revents, void* arg)
+ {
+ K *obj = static_cast<K *>(arg);
+ (obj->*method) (revents);
+ }
+
+ // simple 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)
+ {
+ K *obj = static_cast<K *>(arg);
+ (obj->*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) EV_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 &);
- inline ev_tstamp now (EV_P)
+ 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
+ {
+#ifndef 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_
+
+#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
- #define EV_CONSTRUCT(cppstem) \
- EV_P; \
- \
- void set (EV_P) \
- { \
- this->EV_A = EV_A; \
- } \
- \
- template<class O1, class O2> \
- explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \
- : callback<cppstem> (object, method), EV_A (EV_A)
+ template<class ev_watcher, class watcher>
+ struct base : ev_watcher
+ {
+ #if EV_MULTIPLICITY
+ EV_PX;
- #else
+ void set (EV_PX) 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_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
+ {
+ this->data = data;
+ ev_set_cb (static_cast<ev_watcher *>(this), cb);
+ }
+
+ // method callback
+ template<class K, void (K::*method)(watcher &w, int)>
+ void set (K *object) throw ()
+ {
+ set_ (object, method_thunk<K, method>);
+ }
+
+ template<class K, void (K::*method)(watcher &w, int)>
+ static void method_thunk (EV_P_ ev_watcher *w, int revents)
+ {
+ K *obj = static_cast<K *>(w->data);
+ (obj->*method) (*static_cast<watcher *>(w), revents);
+ }
+
+ // const method callback
+ template<class K, void (K::*method)(watcher &w, int) const>
+ void set (const K *object) throw ()
+ {
+ set_ (object, const_method_thunk<K, method>);
+ }
+
+ template<class K, void (K::*method)(watcher &w, int) const>
+ static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
+ {
+ K *obj = static_cast<K *>(w->data);
+ (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
+ }
+
+ // 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);
+ }
+
+ // simple 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)
+ {
+ K *obj = static_cast<K *>(w->data);
+ (obj->*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 ();
+ }
- #define EV_CONSTRUCT(cppstem) \
- template<class O1, class O2> \
- explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \
- : callback<cppstem> (object, method)
+ 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 : ev_ ## cstem, callback<cppstem> \
+ struct cppstem : base<ev_ ## cstem, cppstem> \
{ \
- EV_CONSTRUCT (cppstem) \
- { \
- ev_init (static_cast<ev_ ## cstem *>(this), thunk); \
- } \
- \
- bool is_active () const \
- { \
- return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \
- } \
- \
- bool is_pending () const \
- { \
- return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \
- } \
- \
- void start () \
+ void start () throw () \
{ \
ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
} \
\
- void stop () \
+ void stop () throw () \
{ \
ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
} \
\
- void operator ()(int events = EV_UNDEF) \
- { \
- return call (this, events); \
- } \
+ cppstem EV_CONSTRUCT(cppstem,cstem) \
\
- ~cppstem () \
+ ~cppstem () throw () \
{ \
stop (); \
} \
\
- private: \
+ using base<ev_ ## cstem, cppstem>::set; \
\
- cppstem (const cppstem &o) \
- : callback<cppstem> (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<cppstem *>(w))(revents); \
- } \
+ cppstem & operator =(const cppstem &o); \
\
public:
};
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 ();
if (active) start ();
}
- void set (int events)
+ void set (int events) throw ()
{
int active = is_active ();
if (active) stop ();
if (active) start ();
}
- void start (int fd, int events)
+ 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.)
+ void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
{
int active = is_active ();
if (active) stop ();
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<ev_timer *>(this));
}
#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 ();
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<ev_periodic *>(this));
}
#endif
EV_BEGIN_WATCHER (sig, signal)
- void set (int signum)
+ void set (int signum) throw ()
{
int active = is_active ();
if (active) stop ();
if (active) start ();
}
- void start (int signum)
+ void start (int signum) throw ()
{
set (signum);
start ();
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 ();
if (active) start ();
}
- void start (int pid)
+ void start (int pid) throw ()
{
set (pid);
start ();
#if EV_STAT_ENABLE
EV_BEGIN_WATCHER (stat, stat)
- void set (const char *path, ev_tstamp interval = 0.)
+ void set (const char *path, ev_tstamp interval = 0.) throw ()
{
int active = is_active ();
if (active) stop ();
if (active) start ();
}
- void start (const char *path, ev_tstamp interval = 0.)
+ void start (const char *path, ev_tstamp interval = 0.) throw ()
{
+ stop ();
set (path, interval);
start ();
}
- void update ()
+ void update () throw ()
{
ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
}
#endif
EV_BEGIN_WATCHER (idle, idle)
- void set () { }
+ void set () throw () { }
EV_END_WATCHER (idle, idle)
EV_BEGIN_WATCHER (prepare, prepare)
- void set () { }
+ void set () throw () { }
EV_END_WATCHER (prepare, prepare)
EV_BEGIN_WATCHER (check, check)
- void set () { }
+ void set () throw () { }
EV_END_WATCHER (check, check)
#if EV_EMBED_ENABLE
EV_BEGIN_WATCHER (embed, embed)
- void set (struct ev_loop *loop)
- {
- int active = is_active ();
- if (active) stop ();
- ev_embed_set (static_cast<ev_embed *>(this), loop);
- if (active) start ();
- }
-
- void start (struct ev_loop *embedded_loop)
+ void start (struct ev_loop *embedded_loop) throw ()
{
- set (embedded_loop);
+ stop ();
+ ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
start ();
}
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
+
}
+#undef EV_THROW
+
#endif
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