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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*!
* \file latency.h
*
* \author Marek Vavrusa <marek.vavrusa@nic.cz>
*
* \brief Utilities for latency profiling.
*
* Selected calls latency profiler is enabled with PROF_LATENCY define.
* You can roughly profile own code with perf_begin() and perf_end() macros.
*
* \addtogroup common_lib
* @{
*/
#ifndef _KNOTD_COMMON_LATENCY_H_
#define _KNOTD_COMMON_LATENCY_H_
/* Optional. */
#ifdef PROF_LATENCY
/* Do not include from latency.c */
#include <sys/time.h>
#include <sys/socket.h>
#include <pthread.h>
/* Profiler tools */
/*! \brief Time profile begin macro. */
#define perf_begin() \
do { \
struct timeval __begin; \
gettimeofday(&__begin, 0)
/*! \brief Time profile end macro
* \param d Will contain the number of microseconds passed from perf_begin().
*/
#define perf_end(d) \
struct timeval __end; \
gettimeofday(&__end, 0); \
unsigned long __us = (__end.tv_sec - __begin.tv_sec) * 1000L * 1000L; \
__us += (__end.tv_usec - __begin.tv_usec); \
(d) = __us; \
} while(0)
/* Prototypes. */
/*! \brief Profiled recvfrom(). */
ssize_t pf_recvfrom(int socket, void *buf, size_t len, int flags,
struct sockaddr *from, socklen_t *fromlen,
const char* caller, const char* file, int line);
/*! \brief Profiled sendto(). */
ssize_t pf_sendto(int socket, const void *buf, size_t len, int flags,
const struct sockaddr *to, socklen_t tolen,
const char* caller, const char* file, int line);
/*! \brief Profiled pthread_mutex_lock(). */
int pf_pthread_mutex_lock(pthread_mutex_t *mutex,
const char* caller, const char* file, int line);
/*! \brief Profiled pthread_mutex_unlock(). */
int pf_pthread_mutex_unlock(pthread_mutex_t *mutex,
const char* caller, const char* file, int line);
/*
* Sockets.
*/
/*! \brief Rerouted recvfrom(). */
#define recvfrom(s, buf, len, flags, from, fromlen) \
pf_recvfrom((s), (buf), (len), (flags), (from), (fromlen), \
__FUNCTION__, __FILE__, __LINE__)
/*! \brief Rerouted sendto(). */
#define sendto(s, buf, len, flags, to, tolen) \
pf_sendto((s), (buf), (len), (flags), (to), (tolen), \
__FUNCTION__, __FILE__, __LINE__)
/*
* Pthreads.
*/
/*! \brief Rerouted pthread_mutex_lock(). */
#define pthread_mutex_lock(m) \
pf_pthread_mutex_lock(m, __FUNCTION__, __FILE__, __LINE__)
/*! \brief Rerouted pthread_mutex_unlock(). */
#define pthread_mutex_unlock(m) \
pf_pthread_mutex_unlock(m, __FUNCTION__, __FILE__, __LINE__)
#else // PROF_LATENCY
/* Profiler tools */
#define perf_begin()
#define perf_end(d)
#endif // PROF_LATENCY
#endif // _KNOTD_COMMON_LATENCY_H_
/*! @} */
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