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root |
1.1 |
/* |
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* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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* |
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* Copyright (©) 2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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* |
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* Deliantra is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* The authors can be reached via e-mail to <support@deliantra.net> |
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*/ |
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#include "global.h" |
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#include "evthread.h" |
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#include "cfperl.h" |
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thread evthread; |
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static ev_loop *loop; |
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root |
1.2 |
#define TICK_CYCLES 4 |
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root |
1.1 |
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// the ticker runs TICK_CYCLES times as fast as the main server tick |
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static ev_periodic cede_watcher; |
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// the tick watcher is activated every TICK_CYCLES |
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ev_async tick_watcher; |
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EV_ATOMIC_T coroapi::cede_pending; |
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// it is a bit silly to have to use a mutex, but contention |
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// is basically non-existant, favouring good mutex implementations. |
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static SMUTEX (evthread_mutex); |
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static NV next_tick; |
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NV get_next_tick () |
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{ |
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SMUTEX_LOCK (evthread_mutex); |
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NV retval = next_tick; |
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SMUTEX_UNLOCK (evthread_mutex); |
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return retval; |
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} |
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static void |
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cede_cb (EV_P_ ev_periodic *w, int revents) |
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{ |
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static int cycle = 0; |
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if (++cycle == TICK_CYCLES) |
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{ |
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cycle = 0; |
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SMUTEX_LOCK (evthread_mutex); |
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next_tick = w->at + TICK / TICK_CYCLES * (TICK_CYCLES - 1); |
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SMUTEX_UNLOCK (evthread_mutex); |
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ev_async_send (EV_DEFAULT, &tick_watcher); |
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} |
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coroapi::cede_pending = 1; |
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} |
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static void |
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tick_cb (EV_P_ ev_async *w, int revents) |
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{ |
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cfperl_tick (); |
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} |
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static void * |
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evthread_proc (void *arg) |
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{ |
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loop = ev_loop_new (0); |
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ev_async_init (&tick_watcher, tick_cb); |
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ev_set_priority (&tick_watcher, 1); |
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ev_async_start (EV_DEFAULT, &tick_watcher); |
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ev_periodic_init (&cede_watcher, cede_cb, 0, TICK / TICK_CYCLES, 0); |
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ev_periodic_start (loop, &cede_watcher); |
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ev_loop (loop, 0); |
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return 0; |
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} |
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void evthread_start () |
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{ |
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I_EV_API ("evthread"); |
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evthread.start (evthread_proc); |
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} |
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