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68 lines
2.2 KiB
68 lines
2.2 KiB
/*
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* timer frequency and ticks conversions
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*
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* Copyright (C) 2005 iptelorg GmbH
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio 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 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* @brief Kamailio core :: timer frequency and ticks conversions
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* @ingroup core
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* Module: @ref core
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*/
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#ifndef _timer_ticks_h
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#define _timer_ticks_h
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/** @brief how many ticks per second (must >1 and < 100 (on linux x86))
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* recomended values >=8, <=32 (a 2^k value is better/faster)*/
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#define TIMER_TICKS_HZ 16U
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/** @brief how many ticks per m milliseconds? (rounded up) */
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#define MS_TO_TICKS(m) (((m)*TIMER_TICKS_HZ+999U)/1000U)
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/** @brief how many ticks per s seconds? */
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#define S_TO_TICKS(s) ((s)*TIMER_TICKS_HZ)
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/** @brief how many s pe per t ticks, integer value */
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#define TICKS_TO_S(t) ((t)/TIMER_TICKS_HZ)
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/** @brief how many ms per t ticks, integer value */
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#define TICKS_TO_MS(t) (((t)*1000U)/TIMER_TICKS_HZ)
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/** @brief ticks comparison operations: t1 OP t2, where OP can be <, >, <=, >= */
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#define TICKS_CMP_OP(t1, t2, OP) \
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(((s_ticks_t)((ticks_t)(t1)-(ticks_t)(t2))) OP (s_ticks_t)0)
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/** @brief t1 < t2 */
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#define TICKS_LT(t1, t2) TICKS_CMP_OP(t1, t2, <)
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/** @brief t1 <= t2 */
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#define TICKS_LE(t1, t2) TICKS_CMP_OP(t1, t2, <=)
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/** @brief t1 > t2 */
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#define TICKS_GT(t1, t2) TICKS_CMP_OP(t1, t2, >)
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/** @brief t1 >= t2 */
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#define TICKS_GE(t1, t2) TICKS_CMP_OP(t1, t2, >=)
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typedef unsigned int ticks_t;/* type used to keep the ticks (must be 32 bits)*/
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typedef signed int s_ticks_t; /* signed ticks type */
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#endif
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