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/* |
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* libev native API header |
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* |
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* Copyright (c) 2007,2008,2009,2010,2011,2012,2015 Marc Alexander Lehmann <libev@schmorp.de> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without modifica- |
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* tion, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* Alternatively, the contents of this file may be used under the terms of |
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* the GNU General Public License ("GPL") version 2 or any later version, |
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* in which case the provisions of the GPL are applicable instead of |
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* the above. If you wish to allow the use of your version of this file |
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* only under the terms of the GPL and not to allow others to use your |
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* version of this file under the BSD license, indicate your decision |
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* by deleting the provisions above and replace them with the notice |
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* and other provisions required by the GPL. If you do not delete the |
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* provisions above, a recipient may use your version of this file under |
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* either the BSD or the GPL. |
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*/ |
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|
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#ifndef EV_H_ |
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#define EV_H_ |
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|
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#ifdef __cplusplus |
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# define EV_CPP(x) x |
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# if __cplusplus >= 201103L |
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# define EV_THROW noexcept |
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# else |
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# define EV_THROW throw () |
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# endif |
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#else |
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# define EV_CPP(x) |
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# define EV_THROW |
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#endif |
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|
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EV_CPP(extern "C" {) |
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|
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/*****************************************************************************/ |
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|
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/* pre-4.0 compatibility */ |
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#ifndef EV_COMPAT3 |
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# define EV_COMPAT3 1 |
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#endif |
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|
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#ifndef EV_FEATURES |
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# if defined __OPTIMIZE_SIZE__ |
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# define EV_FEATURES 0x7c |
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# else |
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# define EV_FEATURES 0x7f |
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# endif |
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#endif |
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|
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#define EV_FEATURE_CODE ((EV_FEATURES) & 1) |
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#define EV_FEATURE_DATA ((EV_FEATURES) & 2) |
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#define EV_FEATURE_CONFIG ((EV_FEATURES) & 4) |
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#define EV_FEATURE_API ((EV_FEATURES) & 8) |
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#define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16) |
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#define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32) |
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#define EV_FEATURE_OS ((EV_FEATURES) & 64) |
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|
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/* these priorities are inclusive, higher priorities will be invoked earlier */ |
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#ifndef EV_MINPRI |
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# define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0) |
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#endif |
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#ifndef EV_MAXPRI |
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# define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0) |
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#endif |
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|
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#ifndef EV_MULTIPLICITY |
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# define EV_MULTIPLICITY EV_FEATURE_CONFIG |
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#endif |
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|
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#ifndef EV_PERIODIC_ENABLE |
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# define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_STAT_ENABLE |
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# define EV_STAT_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_PREPARE_ENABLE |
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# define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_CHECK_ENABLE |
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# define EV_CHECK_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_IDLE_ENABLE |
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# define EV_IDLE_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_FORK_ENABLE |
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# define EV_FORK_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_CLEANUP_ENABLE |
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# define EV_CLEANUP_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_SIGNAL_ENABLE |
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# define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_CHILD_ENABLE |
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# ifdef _WIN32 |
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# define EV_CHILD_ENABLE 0 |
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# else |
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# define EV_CHILD_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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#endif |
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|
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#ifndef EV_ASYNC_ENABLE |
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# define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_EMBED_ENABLE |
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# define EV_EMBED_ENABLE EV_FEATURE_WATCHERS |
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#endif |
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|
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#ifndef EV_WALK_ENABLE |
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# define EV_WALK_ENABLE 0 /* not yet */ |
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#endif |
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|
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/*****************************************************************************/ |
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|
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#if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE |
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# undef EV_SIGNAL_ENABLE |
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# define EV_SIGNAL_ENABLE 1 |
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#endif |
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|
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/*****************************************************************************/ |
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|
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typedef double ev_tstamp; |
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|
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#include <string.h> /* for memmove */ |
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|
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#ifndef EV_ATOMIC_T |
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# include <signal.h> |
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# define EV_ATOMIC_T sig_atomic_t volatile |
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#endif |
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|
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#if EV_STAT_ENABLE |
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# ifdef _WIN32 |
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# include <time.h> |
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# include <sys/types.h> |
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# endif |
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# include <sys/stat.h> |
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#endif |
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|
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/* support multiple event loops? */ |
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#if EV_MULTIPLICITY |
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struct ev_loop; |
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# define EV_P struct ev_loop *loop /* a loop as sole parameter in a declaration */ |
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# define EV_P_ EV_P, /* a loop as first of multiple parameters */ |
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# define EV_A loop /* a loop as sole argument to a function call */ |
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# define EV_A_ EV_A, /* a loop as first of multiple arguments */ |
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# define EV_DEFAULT_UC ev_default_loop_uc_ () /* the default loop, if initialised, as sole arg */ |
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# define EV_DEFAULT_UC_ EV_DEFAULT_UC, /* the default loop as first of multiple arguments */ |
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# define EV_DEFAULT ev_default_loop (0) /* the default loop as sole arg */ |
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# define EV_DEFAULT_ EV_DEFAULT, /* the default loop as first of multiple arguments */ |
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#else |
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# define EV_P void |
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# define EV_P_ |
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# define EV_A |
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# define EV_A_ |
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# define EV_DEFAULT |
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# define EV_DEFAULT_ |
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# define EV_DEFAULT_UC |
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# define EV_DEFAULT_UC_ |
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# undef EV_EMBED_ENABLE |
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#endif |
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|
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/* EV_INLINE is used for functions in header files */ |
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#if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3 |
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# define EV_INLINE static inline |
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#else |
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# define EV_INLINE static |
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#endif |
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|
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#ifdef EV_API_STATIC |
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# define EV_API_DECL static |
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#else |
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# define EV_API_DECL extern |
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#endif |
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|
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/* EV_PROTOTYPES can be used to switch of prototype declarations */ |
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#ifndef EV_PROTOTYPES |
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# define EV_PROTOTYPES 1 |
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#endif |
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|
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/*****************************************************************************/ |
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|
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#define EV_VERSION_MAJOR 4 |
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#define EV_VERSION_MINOR 22 |
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|
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/* eventmask, revents, events... */ |
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enum { |
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EV_UNDEF = (int)0xFFFFFFFF, /* guaranteed to be invalid */ |
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EV_NONE = 0x00, /* no events */ |
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EV_READ = 0x01, /* ev_io detected read will not block */ |
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EV_WRITE = 0x02, /* ev_io detected write will not block */ |
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EV__IOFDSET = 0x80, /* internal use only */ |
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EV_IO = EV_READ, /* alias for type-detection */ |
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EV_TIMER = 0x00000100, /* timer timed out */ |
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#if EV_COMPAT3 |
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EV_TIMEOUT = EV_TIMER, /* pre 4.0 API compatibility */ |
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#endif |
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EV_PERIODIC = 0x00000200, /* periodic timer timed out */ |
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EV_SIGNAL = 0x00000400, /* signal was received */ |
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EV_CHILD = 0x00000800, /* child/pid had status change */ |
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EV_STAT = 0x00001000, /* stat data changed */ |
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EV_IDLE = 0x00002000, /* event loop is idling */ |
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EV_PREPARE = 0x00004000, /* event loop about to poll */ |
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EV_CHECK = 0x00008000, /* event loop finished poll */ |
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EV_EMBED = 0x00010000, /* embedded event loop needs sweep */ |
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EV_FORK = 0x00020000, /* event loop resumed in child */ |
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EV_CLEANUP = 0x00040000, /* event loop resumed in child */ |
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EV_ASYNC = 0x00080000, /* async intra-loop signal */ |
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EV_CUSTOM = 0x01000000, /* for use by user code */ |
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EV_ERROR = (int)0x80000000 /* sent when an error occurs */ |
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}; |
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|
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/* can be used to add custom fields to all watchers, while losing binary compatibility */ |
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#ifndef EV_COMMON |
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# define EV_COMMON void *data; |
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#endif |
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|
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#ifndef EV_CB_DECLARE |
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# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); |
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#endif |
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#ifndef EV_CB_INVOKE |
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# define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) |
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#endif |
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|
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/* not official, do not use */ |
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#define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents) |
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|
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/* |
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* struct member types: |
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* private: you may look at them, but not change them, |
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* and they might not mean anything to you. |
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* ro: can be read anytime, but only changed when the watcher isn't active. |
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* rw: can be read and modified anytime, even when the watcher is active. |
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* |
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* some internal details that might be helpful for debugging: |
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* |
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* active is either 0, which means the watcher is not active, |
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* or the array index of the watcher (periodics, timers) |
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* or the array index + 1 (most other watchers) |
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* or simply 1 for watchers that aren't in some array. |
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* pending is either 0, in which case the watcher isn't, |
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* or the array index + 1 in the pendings array. |
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*/ |
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|
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#if EV_MINPRI == EV_MAXPRI |
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# define EV_DECL_PRIORITY |
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#elif !defined (EV_DECL_PRIORITY) |
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# define EV_DECL_PRIORITY int priority; |
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#endif |
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|
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/* shared by all watchers */ |
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#define EV_WATCHER(type) \ |
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int active; /* private */ \ |
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int pending; /* private */ \ |
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EV_DECL_PRIORITY /* private */ \ |
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EV_COMMON /* rw */ \ |
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EV_CB_DECLARE (type) /* private */ |
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|
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#define EV_WATCHER_LIST(type) \ |
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EV_WATCHER (type) \ |
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struct ev_watcher_list *next; /* private */ |
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|
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#define EV_WATCHER_TIME(type) \ |
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EV_WATCHER (type) \ |
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ev_tstamp at; /* private */ |
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|
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/* base class, nothing to see here unless you subclass */ |
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typedef struct ev_watcher |
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{ |
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EV_WATCHER (ev_watcher) |
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} ev_watcher; |
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|
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/* base class, nothing to see here unless you subclass */ |
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typedef struct ev_watcher_list |
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{ |
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EV_WATCHER_LIST (ev_watcher_list) |
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} ev_watcher_list; |
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|
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/* base class, nothing to see here unless you subclass */ |
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typedef struct ev_watcher_time |
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{ |
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EV_WATCHER_TIME (ev_watcher_time) |
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} ev_watcher_time; |
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|
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/* invoked when fd is either EV_READable or EV_WRITEable */ |
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/* revent EV_READ, EV_WRITE */ |
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typedef struct ev_io |
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{ |
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EV_WATCHER_LIST (ev_io) |
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|
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int fd; /* ro */ |
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int events; /* ro */ |
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} ev_io; |
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|
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/* invoked after a specific time, repeatable (based on monotonic clock) */ |
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/* revent EV_TIMEOUT */ |
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typedef struct ev_timer |
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{ |
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EV_WATCHER_TIME (ev_timer) |
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|
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ev_tstamp repeat; /* rw */ |
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} ev_timer; |
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|
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/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
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/* revent EV_PERIODIC */ |
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typedef struct ev_periodic |
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{ |
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EV_WATCHER_TIME (ev_periodic) |
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|
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ev_tstamp offset; /* rw */ |
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ev_tstamp interval; /* rw */ |
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ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now) EV_THROW; /* rw */ |
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} ev_periodic; |
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|
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/* invoked when the given signal has been received */ |
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/* revent EV_SIGNAL */ |
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typedef struct ev_signal |
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{ |
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EV_WATCHER_LIST (ev_signal) |
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|
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int signum; /* ro */ |
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} ev_signal; |
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|
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/* invoked when sigchld is received and waitpid indicates the given pid */ |
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/* revent EV_CHILD */ |
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/* does not support priorities */ |
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typedef struct ev_child |
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{ |
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EV_WATCHER_LIST (ev_child) |
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|
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int flags; /* private */ |
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int pid; /* ro */ |
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int rpid; /* rw, holds the received pid */ |
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int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
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} ev_child; |
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|
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#if EV_STAT_ENABLE |
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/* st_nlink = 0 means missing file or other error */ |
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# ifdef _WIN32 |
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typedef struct _stati64 ev_statdata; |
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# else |
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typedef struct stat ev_statdata; |
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# endif |
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|
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/* invoked each time the stat data changes for a given path */ |
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/* revent EV_STAT */ |
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typedef struct ev_stat |
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{ |
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EV_WATCHER_LIST (ev_stat) |
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|
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ev_timer timer; /* private */ |
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ev_tstamp interval; /* ro */ |
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const char *path; /* ro */ |
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ev_statdata prev; /* ro */ |
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ev_statdata attr; /* ro */ |
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|
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int wd; /* wd for inotify, fd for kqueue */ |
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} ev_stat; |
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#endif |
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|
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#if EV_IDLE_ENABLE |
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/* invoked when the nothing else needs to be done, keeps the process from blocking */ |
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/* revent EV_IDLE */ |
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typedef struct ev_idle |
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{ |
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EV_WATCHER (ev_idle) |
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} ev_idle; |
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#endif |
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|
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/* invoked for each run of the mainloop, just before the blocking call */ |
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/* you can still change events in any way you like */ |
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/* revent EV_PREPARE */ |
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typedef struct ev_prepare |
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{ |
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EV_WATCHER (ev_prepare) |
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} ev_prepare; |
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|
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/* invoked for each run of the mainloop, just after the blocking call */ |
| 409 |
/* revent EV_CHECK */ |
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typedef struct ev_check |
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{ |
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EV_WATCHER (ev_check) |
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} ev_check; |
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|
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#if EV_FORK_ENABLE |
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/* the callback gets invoked before check in the child process when a fork was detected */ |
| 417 |
/* revent EV_FORK */ |
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typedef struct ev_fork |
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{ |
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EV_WATCHER (ev_fork) |
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} ev_fork; |
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#endif |
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|
| 424 |
#if EV_CLEANUP_ENABLE |
| 425 |
/* is invoked just before the loop gets destroyed */ |
| 426 |
/* revent EV_CLEANUP */ |
| 427 |
typedef struct ev_cleanup |
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{ |
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EV_WATCHER (ev_cleanup) |
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} ev_cleanup; |
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#endif |
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|
| 433 |
#if EV_EMBED_ENABLE |
| 434 |
/* used to embed an event loop inside another */ |
| 435 |
/* the callback gets invoked when the event loop has handled events, and can be 0 */ |
| 436 |
typedef struct ev_embed |
| 437 |
{ |
| 438 |
EV_WATCHER (ev_embed) |
| 439 |
|
| 440 |
struct ev_loop *other; /* ro */ |
| 441 |
ev_io io; /* private */ |
| 442 |
ev_prepare prepare; /* private */ |
| 443 |
ev_check check; /* unused */ |
| 444 |
ev_timer timer; /* unused */ |
| 445 |
ev_periodic periodic; /* unused */ |
| 446 |
ev_idle idle; /* unused */ |
| 447 |
ev_fork fork; /* private */ |
| 448 |
#if EV_CLEANUP_ENABLE |
| 449 |
ev_cleanup cleanup; /* unused */ |
| 450 |
#endif |
| 451 |
} ev_embed; |
| 452 |
#endif |
| 453 |
|
| 454 |
#if EV_ASYNC_ENABLE |
| 455 |
/* invoked when somebody calls ev_async_send on the watcher */ |
| 456 |
/* revent EV_ASYNC */ |
| 457 |
typedef struct ev_async |
| 458 |
{ |
| 459 |
EV_WATCHER (ev_async) |
| 460 |
|
| 461 |
EV_ATOMIC_T sent; /* private */ |
| 462 |
} ev_async; |
| 463 |
|
| 464 |
# define ev_async_pending(w) (+(w)->sent) |
| 465 |
#endif |
| 466 |
|
| 467 |
/* the presence of this union forces similar struct layout */ |
| 468 |
union ev_any_watcher |
| 469 |
{ |
| 470 |
struct ev_watcher w; |
| 471 |
struct ev_watcher_list wl; |
| 472 |
|
| 473 |
struct ev_io io; |
| 474 |
struct ev_timer timer; |
| 475 |
struct ev_periodic periodic; |
| 476 |
struct ev_signal signal; |
| 477 |
struct ev_child child; |
| 478 |
#if EV_STAT_ENABLE |
| 479 |
struct ev_stat stat; |
| 480 |
#endif |
| 481 |
#if EV_IDLE_ENABLE |
| 482 |
struct ev_idle idle; |
| 483 |
#endif |
| 484 |
struct ev_prepare prepare; |
| 485 |
struct ev_check check; |
| 486 |
#if EV_FORK_ENABLE |
| 487 |
struct ev_fork fork; |
| 488 |
#endif |
| 489 |
#if EV_CLEANUP_ENABLE |
| 490 |
struct ev_cleanup cleanup; |
| 491 |
#endif |
| 492 |
#if EV_EMBED_ENABLE |
| 493 |
struct ev_embed embed; |
| 494 |
#endif |
| 495 |
#if EV_ASYNC_ENABLE |
| 496 |
struct ev_async async; |
| 497 |
#endif |
| 498 |
}; |
| 499 |
|
| 500 |
/* flag bits for ev_default_loop and ev_loop_new */ |
| 501 |
enum { |
| 502 |
/* the default */ |
| 503 |
EVFLAG_AUTO = 0x00000000U, /* not quite a mask */ |
| 504 |
/* flag bits */ |
| 505 |
EVFLAG_NOENV = 0x01000000U, /* do NOT consult environment */ |
| 506 |
EVFLAG_FORKCHECK = 0x02000000U, /* check for a fork in each iteration */ |
| 507 |
/* debugging/feature disable */ |
| 508 |
EVFLAG_NOINOTIFY = 0x00100000U, /* do not attempt to use inotify */ |
| 509 |
#if EV_COMPAT3 |
| 510 |
EVFLAG_NOSIGFD = 0, /* compatibility to pre-3.9 */ |
| 511 |
#endif |
| 512 |
EVFLAG_SIGNALFD = 0x00200000U, /* attempt to use signalfd */ |
| 513 |
EVFLAG_NOSIGMASK = 0x00400000U /* avoid modifying the signal mask */ |
| 514 |
}; |
| 515 |
|
| 516 |
/* method bits to be ored together */ |
| 517 |
enum { |
| 518 |
EVBACKEND_SELECT = 0x00000001U, /* available just about anywhere */ |
| 519 |
EVBACKEND_POLL = 0x00000002U, /* !win, !aix, broken on osx */ |
| 520 |
EVBACKEND_EPOLL = 0x00000004U, /* linux */ |
| 521 |
EVBACKEND_KQUEUE = 0x00000008U, /* bsd, broken on osx */ |
| 522 |
EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */ |
| 523 |
EVBACKEND_PORT = 0x00000020U, /* solaris 10 */ |
| 524 |
EVBACKEND_ALL = 0x0000003FU, /* all known backends */ |
| 525 |
EVBACKEND_MASK = 0x0000FFFFU /* all future backends */ |
| 526 |
}; |
| 527 |
|
| 528 |
#if EV_PROTOTYPES |
| 529 |
EV_API_DECL int ev_version_major (void) EV_THROW; |
| 530 |
EV_API_DECL int ev_version_minor (void) EV_THROW; |
| 531 |
|
| 532 |
EV_API_DECL unsigned int ev_supported_backends (void) EV_THROW; |
| 533 |
EV_API_DECL unsigned int ev_recommended_backends (void) EV_THROW; |
| 534 |
EV_API_DECL unsigned int ev_embeddable_backends (void) EV_THROW; |
| 535 |
|
| 536 |
EV_API_DECL ev_tstamp ev_time (void) EV_THROW; |
| 537 |
EV_API_DECL void ev_sleep (ev_tstamp delay) EV_THROW; /* sleep for a while */ |
| 538 |
|
| 539 |
/* Sets the allocation function to use, works like realloc. |
| 540 |
* It is used to allocate and free memory. |
| 541 |
* If it returns zero when memory needs to be allocated, the library might abort |
| 542 |
* or take some potentially destructive action. |
| 543 |
* The default is your system realloc function. |
| 544 |
*/ |
| 545 |
EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW; |
| 546 |
|
| 547 |
/* set the callback function to call on a |
| 548 |
* retryable syscall error |
| 549 |
* (such as failed select, poll, epoll_wait) |
| 550 |
*/ |
| 551 |
EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW; |
| 552 |
|
| 553 |
#if EV_MULTIPLICITY |
| 554 |
|
| 555 |
/* the default loop is the only one that handles signals and child watchers */ |
| 556 |
/* you can call this as often as you like */ |
| 557 |
EV_API_DECL struct ev_loop *ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_THROW; |
| 558 |
|
| 559 |
#ifdef EV_API_STATIC |
| 560 |
EV_API_DECL struct ev_loop *ev_default_loop_ptr; |
| 561 |
#endif |
| 562 |
|
| 563 |
EV_INLINE struct ev_loop * |
| 564 |
ev_default_loop_uc_ (void) EV_THROW |
| 565 |
{ |
| 566 |
extern struct ev_loop *ev_default_loop_ptr; |
| 567 |
|
| 568 |
return ev_default_loop_ptr; |
| 569 |
} |
| 570 |
|
| 571 |
EV_INLINE int |
| 572 |
ev_is_default_loop (EV_P) EV_THROW |
| 573 |
{ |
| 574 |
return EV_A == EV_DEFAULT_UC; |
| 575 |
} |
| 576 |
|
| 577 |
/* create and destroy alternative loops that don't handle signals */ |
| 578 |
EV_API_DECL struct ev_loop *ev_loop_new (unsigned int flags EV_CPP (= 0)) EV_THROW; |
| 579 |
|
| 580 |
EV_API_DECL ev_tstamp ev_now (EV_P) EV_THROW; /* time w.r.t. timers and the eventloop, updated after each poll */ |
| 581 |
|
| 582 |
#else |
| 583 |
|
| 584 |
EV_API_DECL int ev_default_loop (unsigned int flags EV_CPP (= 0)) EV_THROW; /* returns true when successful */ |
| 585 |
|
| 586 |
EV_API_DECL ev_tstamp ev_rt_now; |
| 587 |
|
| 588 |
EV_INLINE ev_tstamp |
| 589 |
ev_now (void) EV_THROW |
| 590 |
{ |
| 591 |
return ev_rt_now; |
| 592 |
} |
| 593 |
|
| 594 |
/* looks weird, but ev_is_default_loop (EV_A) still works if this exists */ |
| 595 |
EV_INLINE int |
| 596 |
ev_is_default_loop (void) EV_THROW |
| 597 |
{ |
| 598 |
return 1; |
| 599 |
} |
| 600 |
|
| 601 |
#endif /* multiplicity */ |
| 602 |
|
| 603 |
/* destroy event loops, also works for the default loop */ |
| 604 |
EV_API_DECL void ev_loop_destroy (EV_P); |
| 605 |
|
| 606 |
/* this needs to be called after fork, to duplicate the loop */ |
| 607 |
/* when you want to re-use it in the child */ |
| 608 |
/* you can call it in either the parent or the child */ |
| 609 |
/* you can actually call it at any time, anywhere :) */ |
| 610 |
EV_API_DECL void ev_loop_fork (EV_P) EV_THROW; |
| 611 |
|
| 612 |
EV_API_DECL unsigned int ev_backend (EV_P) EV_THROW; /* backend in use by loop */ |
| 613 |
|
| 614 |
EV_API_DECL void ev_now_update (EV_P) EV_THROW; /* update event loop time */ |
| 615 |
|
| 616 |
#if EV_WALK_ENABLE |
| 617 |
/* walk (almost) all watchers in the loop of a given type, invoking the */ |
| 618 |
/* callback on every such watcher. The callback might stop the watcher, */ |
| 619 |
/* but do nothing else with the loop */ |
| 620 |
EV_API_DECL void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW; |
| 621 |
#endif |
| 622 |
|
| 623 |
#endif /* prototypes */ |
| 624 |
|
| 625 |
/* ev_run flags values */ |
| 626 |
enum { |
| 627 |
EVRUN_NOWAIT = 1, /* do not block/wait */ |
| 628 |
EVRUN_ONCE = 2 /* block *once* only */ |
| 629 |
}; |
| 630 |
|
| 631 |
/* ev_break how values */ |
| 632 |
enum { |
| 633 |
EVBREAK_CANCEL = 0, /* undo unloop */ |
| 634 |
EVBREAK_ONE = 1, /* unloop once */ |
| 635 |
EVBREAK_ALL = 2 /* unloop all loops */ |
| 636 |
}; |
| 637 |
|
| 638 |
#if EV_PROTOTYPES |
| 639 |
EV_API_DECL int ev_run (EV_P_ int flags EV_CPP (= 0)); |
| 640 |
EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_THROW; /* break out of the loop */ |
| 641 |
|
| 642 |
/* |
| 643 |
* ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
| 644 |
* keeps one reference. if you have a long-running watcher you never unregister that |
| 645 |
* should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
| 646 |
*/ |
| 647 |
EV_API_DECL void ev_ref (EV_P) EV_THROW; |
| 648 |
EV_API_DECL void ev_unref (EV_P) EV_THROW; |
| 649 |
|
| 650 |
/* |
| 651 |
* convenience function, wait for a single event, without registering an event watcher |
| 652 |
* if timeout is < 0, do wait indefinitely |
| 653 |
*/ |
| 654 |
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; |
| 655 |
|
| 656 |
# if EV_FEATURE_API |
| 657 |
EV_API_DECL unsigned int ev_iteration (EV_P) EV_THROW; /* number of loop iterations */ |
| 658 |
EV_API_DECL unsigned int ev_depth (EV_P) EV_THROW; /* #ev_loop enters - #ev_loop leaves */ |
| 659 |
EV_API_DECL void ev_verify (EV_P) EV_THROW; /* abort if loop data corrupted */ |
| 660 |
|
| 661 |
EV_API_DECL void ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW; /* sleep at least this time, default 0 */ |
| 662 |
EV_API_DECL void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW; /* sleep at least this time, default 0 */ |
| 663 |
|
| 664 |
/* advanced stuff for threading etc. support, see docs */ |
| 665 |
EV_API_DECL void ev_set_userdata (EV_P_ void *data) EV_THROW; |
| 666 |
EV_API_DECL void *ev_userdata (EV_P) EV_THROW; |
| 667 |
typedef void (*ev_loop_callback)(EV_P); |
| 668 |
EV_API_DECL void ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW; |
| 669 |
/* C++ doesn't allow the use of the ev_loop_callback typedef here, so we need to spell it out */ |
| 670 |
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; |
| 671 |
|
| 672 |
EV_API_DECL unsigned int ev_pending_count (EV_P) EV_THROW; /* number of pending events, if any */ |
| 673 |
EV_API_DECL void ev_invoke_pending (EV_P); /* invoke all pending watchers */ |
| 674 |
|
| 675 |
/* |
| 676 |
* stop/start the timer handling. |
| 677 |
*/ |
| 678 |
EV_API_DECL void ev_suspend (EV_P) EV_THROW; |
| 679 |
EV_API_DECL void ev_resume (EV_P) EV_THROW; |
| 680 |
#endif |
| 681 |
|
| 682 |
#endif |
| 683 |
|
| 684 |
/* these may evaluate ev multiple times, and the other arguments at most once */ |
| 685 |
/* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
| 686 |
#define ev_init(ev,cb_) do { \ |
| 687 |
((ev_watcher *)(void *)(ev))->active = \ |
| 688 |
((ev_watcher *)(void *)(ev))->pending = 0; \ |
| 689 |
ev_set_priority ((ev), 0); \ |
| 690 |
ev_set_cb ((ev), cb_); \ |
| 691 |
} while (0) |
| 692 |
|
| 693 |
#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0) |
| 694 |
#define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0) |
| 695 |
#define ev_periodic_set(ev,ofs_,ival_,rcb_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0) |
| 696 |
#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
| 697 |
#define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) |
| 698 |
#define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) |
| 699 |
#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
| 700 |
#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
| 701 |
#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
| 702 |
#define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) |
| 703 |
#define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ |
| 704 |
#define ev_cleanup_set(ev) /* nop, yes, this is a serious in-joke */ |
| 705 |
#define ev_async_set(ev) /* nop, yes, this is a serious in-joke */ |
| 706 |
|
| 707 |
#define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
| 708 |
#define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
| 709 |
#define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0) |
| 710 |
#define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
| 711 |
#define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0) |
| 712 |
#define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) |
| 713 |
#define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
| 714 |
#define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
| 715 |
#define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
| 716 |
#define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) |
| 717 |
#define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) |
| 718 |
#define ev_cleanup_init(ev,cb) do { ev_init ((ev), (cb)); ev_cleanup_set ((ev)); } while (0) |
| 719 |
#define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) |
| 720 |
|
| 721 |
#define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
| 722 |
#define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
| 723 |
|
| 724 |
#define ev_cb_(ev) (ev)->cb /* rw */ |
| 725 |
#define ev_cb(ev) (memmove (&ev_cb_ (ev), &((ev_watcher *)(ev))->cb, sizeof (ev_cb_ (ev))), (ev)->cb) |
| 726 |
|
| 727 |
#if EV_MINPRI == EV_MAXPRI |
| 728 |
# define ev_priority(ev) ((ev), EV_MINPRI) |
| 729 |
# define ev_set_priority(ev,pri) ((ev), (pri)) |
| 730 |
#else |
| 731 |
# define ev_priority(ev) (+(((ev_watcher *)(void *)(ev))->priority)) |
| 732 |
# define ev_set_priority(ev,pri) ( (ev_watcher *)(void *)(ev))->priority = (pri) |
| 733 |
#endif |
| 734 |
|
| 735 |
#define ev_periodic_at(ev) (+((ev_watcher_time *)(ev))->at) |
| 736 |
|
| 737 |
#ifndef ev_set_cb |
| 738 |
# define ev_set_cb(ev,cb_) (ev_cb_ (ev) = (cb_), memmove (&((ev_watcher *)(ev))->cb, &ev_cb_ (ev), sizeof (ev_cb_ (ev)))) |
| 739 |
#endif |
| 740 |
|
| 741 |
/* stopping (enabling, adding) a watcher does nothing if it is already running */ |
| 742 |
/* stopping (disabling, deleting) a watcher does nothing unless it's already running */ |
| 743 |
#if EV_PROTOTYPES |
| 744 |
|
| 745 |
/* feeds an event into a watcher as if the event actually occurred */ |
| 746 |
/* accepts any ev_watcher type */ |
| 747 |
EV_API_DECL void ev_feed_event (EV_P_ void *w, int revents) EV_THROW; |
| 748 |
EV_API_DECL void ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW; |
| 749 |
#if EV_SIGNAL_ENABLE |
| 750 |
EV_API_DECL void ev_feed_signal (int signum) EV_THROW; |
| 751 |
EV_API_DECL void ev_feed_signal_event (EV_P_ int signum) EV_THROW; |
| 752 |
#endif |
| 753 |
EV_API_DECL void ev_invoke (EV_P_ void *w, int revents); |
| 754 |
EV_API_DECL int ev_clear_pending (EV_P_ void *w) EV_THROW; |
| 755 |
|
| 756 |
EV_API_DECL void ev_io_start (EV_P_ ev_io *w) EV_THROW; |
| 757 |
EV_API_DECL void ev_io_stop (EV_P_ ev_io *w) EV_THROW; |
| 758 |
|
| 759 |
EV_API_DECL void ev_timer_start (EV_P_ ev_timer *w) EV_THROW; |
| 760 |
EV_API_DECL void ev_timer_stop (EV_P_ ev_timer *w) EV_THROW; |
| 761 |
/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
| 762 |
EV_API_DECL void ev_timer_again (EV_P_ ev_timer *w) EV_THROW; |
| 763 |
/* return remaining time */ |
| 764 |
EV_API_DECL ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW; |
| 765 |
|
| 766 |
#if EV_PERIODIC_ENABLE |
| 767 |
EV_API_DECL void ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW; |
| 768 |
EV_API_DECL void ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW; |
| 769 |
EV_API_DECL void ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW; |
| 770 |
#endif |
| 771 |
|
| 772 |
/* only supported in the default loop */ |
| 773 |
#if EV_SIGNAL_ENABLE |
| 774 |
EV_API_DECL void ev_signal_start (EV_P_ ev_signal *w) EV_THROW; |
| 775 |
EV_API_DECL void ev_signal_stop (EV_P_ ev_signal *w) EV_THROW; |
| 776 |
#endif |
| 777 |
|
| 778 |
/* only supported in the default loop */ |
| 779 |
# if EV_CHILD_ENABLE |
| 780 |
EV_API_DECL void ev_child_start (EV_P_ ev_child *w) EV_THROW; |
| 781 |
EV_API_DECL void ev_child_stop (EV_P_ ev_child *w) EV_THROW; |
| 782 |
# endif |
| 783 |
|
| 784 |
# if EV_STAT_ENABLE |
| 785 |
EV_API_DECL void ev_stat_start (EV_P_ ev_stat *w) EV_THROW; |
| 786 |
EV_API_DECL void ev_stat_stop (EV_P_ ev_stat *w) EV_THROW; |
| 787 |
EV_API_DECL void ev_stat_stat (EV_P_ ev_stat *w) EV_THROW; |
| 788 |
# endif |
| 789 |
|
| 790 |
# if EV_IDLE_ENABLE |
| 791 |
EV_API_DECL void ev_idle_start (EV_P_ ev_idle *w) EV_THROW; |
| 792 |
EV_API_DECL void ev_idle_stop (EV_P_ ev_idle *w) EV_THROW; |
| 793 |
# endif |
| 794 |
|
| 795 |
#if EV_PREPARE_ENABLE |
| 796 |
EV_API_DECL void ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW; |
| 797 |
EV_API_DECL void ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW; |
| 798 |
#endif |
| 799 |
|
| 800 |
#if EV_CHECK_ENABLE |
| 801 |
EV_API_DECL void ev_check_start (EV_P_ ev_check *w) EV_THROW; |
| 802 |
EV_API_DECL void ev_check_stop (EV_P_ ev_check *w) EV_THROW; |
| 803 |
#endif |
| 804 |
|
| 805 |
# if EV_FORK_ENABLE |
| 806 |
EV_API_DECL void ev_fork_start (EV_P_ ev_fork *w) EV_THROW; |
| 807 |
EV_API_DECL void ev_fork_stop (EV_P_ ev_fork *w) EV_THROW; |
| 808 |
# endif |
| 809 |
|
| 810 |
# if EV_CLEANUP_ENABLE |
| 811 |
EV_API_DECL void ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW; |
| 812 |
EV_API_DECL void ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW; |
| 813 |
# endif |
| 814 |
|
| 815 |
# if EV_EMBED_ENABLE |
| 816 |
/* only supported when loop to be embedded is in fact embeddable */ |
| 817 |
EV_API_DECL void ev_embed_start (EV_P_ ev_embed *w) EV_THROW; |
| 818 |
EV_API_DECL void ev_embed_stop (EV_P_ ev_embed *w) EV_THROW; |
| 819 |
EV_API_DECL void ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW; |
| 820 |
# endif |
| 821 |
|
| 822 |
# if EV_ASYNC_ENABLE |
| 823 |
EV_API_DECL void ev_async_start (EV_P_ ev_async *w) EV_THROW; |
| 824 |
EV_API_DECL void ev_async_stop (EV_P_ ev_async *w) EV_THROW; |
| 825 |
EV_API_DECL void ev_async_send (EV_P_ ev_async *w) EV_THROW; |
| 826 |
# endif |
| 827 |
|
| 828 |
#if EV_COMPAT3 |
| 829 |
#define EVLOOP_NONBLOCK EVRUN_NOWAIT |
| 830 |
#define EVLOOP_ONESHOT EVRUN_ONCE |
| 831 |
#define EVUNLOOP_CANCEL EVBREAK_CANCEL |
| 832 |
#define EVUNLOOP_ONE EVBREAK_ONE |
| 833 |
#define EVUNLOOP_ALL EVBREAK_ALL |
| 834 |
#if EV_PROTOTYPES |
| 835 |
EV_INLINE void ev_loop (EV_P_ int flags) { ev_run (EV_A_ flags); } |
| 836 |
EV_INLINE void ev_unloop (EV_P_ int how ) { ev_break (EV_A_ how ); } |
| 837 |
EV_INLINE void ev_default_destroy (void) { ev_loop_destroy (EV_DEFAULT); } |
| 838 |
EV_INLINE void ev_default_fork (void) { ev_loop_fork (EV_DEFAULT); } |
| 839 |
#if EV_FEATURE_API |
| 840 |
EV_INLINE unsigned int ev_loop_count (EV_P) { return ev_iteration (EV_A); } |
| 841 |
EV_INLINE unsigned int ev_loop_depth (EV_P) { return ev_depth (EV_A); } |
| 842 |
EV_INLINE void ev_loop_verify (EV_P) { ev_verify (EV_A); } |
| 843 |
#endif |
| 844 |
#endif |
| 845 |
#else |
| 846 |
typedef struct ev_loop ev_loop; |
| 847 |
#endif |
| 848 |
|
| 849 |
#endif |
| 850 |
|
| 851 |
EV_CPP(}) |
| 852 |
|
| 853 |
#endif |
| 854 |
|
