2008-06-12 14:21:32 +00:00
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2008, Digium, Inc.
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*
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* Kevin P. Fleming <kpfleming@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Timing source management
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*
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* \author Kevin P. Fleming <kpfleming@digium.com>
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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2008-06-16 13:03:40 +00:00
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#include "asterisk/_private.h"
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2008-06-12 14:21:32 +00:00
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#include "asterisk/timing.h"
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#include "asterisk/lock.h"
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2008-06-16 13:03:40 +00:00
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#include "asterisk/cli.h"
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#include "asterisk/utils.h"
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#include "asterisk/time.h"
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2008-06-12 14:21:32 +00:00
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2008-06-13 12:45:50 +00:00
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AST_RWLOCK_DEFINE_STATIC(lock);
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2008-06-12 14:21:32 +00:00
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static struct ast_timing_functions timer_funcs;
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void *ast_install_timing_functions(struct ast_timing_functions *funcs)
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{
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if (!funcs->timer_open ||
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!funcs->timer_close ||
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2008-06-13 12:45:50 +00:00
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!funcs->timer_set_rate ||
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2008-06-12 14:21:32 +00:00
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!funcs->timer_ack ||
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!funcs->timer_get_event ||
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!funcs->timer_enable_continuous ||
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!funcs->timer_disable_continuous) {
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return NULL;
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}
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2008-06-13 12:45:50 +00:00
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ast_rwlock_wrlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (timer_funcs.timer_open) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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ast_log(LOG_NOTICE, "Multiple timing modules are loaded. You should only load one.\n");
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2008-06-12 14:21:32 +00:00
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return NULL;
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}
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timer_funcs = *funcs;
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return &timer_funcs;
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}
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void ast_uninstall_timing_functions(void *handle)
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{
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2008-06-13 12:45:50 +00:00
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ast_rwlock_wrlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (handle != &timer_funcs) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return;
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}
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memset(&timer_funcs, 0, sizeof(timer_funcs));
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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}
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2008-06-13 12:45:50 +00:00
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int ast_timer_open(void)
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2008-06-12 14:21:32 +00:00
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{
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int timer;
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2008-06-13 12:45:50 +00:00
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ast_rwlock_rdlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (!timer_funcs.timer_open) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return -1;
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}
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2008-06-13 12:45:50 +00:00
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timer = timer_funcs.timer_open();
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2008-06-12 14:21:32 +00:00
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return timer;
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}
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void ast_timer_close(int timer)
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{
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2008-06-13 12:45:50 +00:00
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ast_rwlock_rdlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (!timer_funcs.timer_close) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return;
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}
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timer_funcs.timer_close(timer);
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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}
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int ast_timer_set_rate(int handle, unsigned int rate)
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{
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int res;
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ast_rwlock_rdlock(&lock);
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if (!timer_funcs.timer_set_rate) {
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ast_rwlock_unlock(&lock);
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return -1;
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}
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res = timer_funcs.timer_set_rate(handle, rate);
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ast_rwlock_unlock(&lock);
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return res;
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2008-06-12 14:21:32 +00:00
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}
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void ast_timer_ack(int handle, unsigned int quantity)
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{
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2008-06-13 12:45:50 +00:00
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ast_rwlock_rdlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (!timer_funcs.timer_ack) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return;
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}
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timer_funcs.timer_ack(handle, quantity);
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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}
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int ast_timer_enable_continuous(int handle)
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{
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int result;
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2008-06-13 12:45:50 +00:00
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ast_rwlock_rdlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (!timer_funcs.timer_enable_continuous) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return -1;
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}
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result = timer_funcs.timer_enable_continuous(handle);
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return result;
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}
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2008-06-16 12:48:11 +00:00
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int ast_timer_disable_continuous(int handle)
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2008-06-12 14:21:32 +00:00
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{
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int result;
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2008-06-13 12:45:50 +00:00
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ast_rwlock_rdlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (!timer_funcs.timer_disable_continuous) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return -1;
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}
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result = timer_funcs.timer_disable_continuous(handle);
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return result;
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}
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enum ast_timing_event ast_timer_get_event(int handle)
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{
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enum ast_timing_event result;
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2008-06-13 12:45:50 +00:00
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ast_rwlock_rdlock(&lock);
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2008-06-12 14:21:32 +00:00
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if (!timer_funcs.timer_get_event) {
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return -1;
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}
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result = timer_funcs.timer_get_event(handle);
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2008-06-13 12:45:50 +00:00
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ast_rwlock_unlock(&lock);
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2008-06-12 14:21:32 +00:00
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return result;
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}
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2008-06-16 13:03:40 +00:00
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static char *timing_test(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
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{
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int fd, count = 0;
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struct timeval start, end;
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2008-06-19 18:30:49 +00:00
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unsigned int test_rate = 50;
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2008-06-16 13:03:40 +00:00
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switch (cmd) {
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case CLI_INIT:
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e->command = "timing test";
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2008-06-19 18:30:49 +00:00
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e->usage = "Usage: timing test <rate>\n"
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" Test a timer with a specified rate, 100/sec by default.\n"
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"";
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2008-06-16 13:03:40 +00:00
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return NULL;
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case CLI_GENERATE:
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return NULL;
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}
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2008-06-19 18:30:49 +00:00
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if (a->argc != 2 && a->argc != 3) {
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return CLI_SHOWUSAGE;
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}
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if (a->argc == 3) {
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unsigned int rate;
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if (sscanf(a->argv[2], "%u", &rate) == 1) {
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test_rate = rate;
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} else {
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ast_cli(a->fd, "Invalid rate '%s', using default of %u\n", a->argv[2], test_rate);
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}
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}
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ast_cli(a->fd, "Attempting to test a timer with %u ticks per second ...\n", test_rate);
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2008-06-16 13:03:40 +00:00
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if ((fd = ast_timer_open()) == -1) {
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ast_cli(a->fd, "Failed to open timing fd\n");
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return CLI_FAILURE;
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}
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start = ast_tvnow();
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2008-06-19 18:30:49 +00:00
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ast_timer_set_rate(fd, test_rate);
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2008-06-16 13:03:40 +00:00
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while (ast_tvdiff_ms((end = ast_tvnow()), start) < 1000) {
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int res;
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struct pollfd pfd = {
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.fd = fd,
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.events = POLLIN | POLLPRI,
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};
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res = poll(&pfd, 1, 100);
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if (res == 1) {
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count++;
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ast_timer_ack(fd, 1);
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} else if (!res) {
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ast_cli(a->fd, "poll() timed out! This is bad.\n");
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} else if (errno != EAGAIN && errno != EINTR) {
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ast_cli(a->fd, "poll() returned error: %s\n", strerror(errno));
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}
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}
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ast_timer_close(fd);
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ast_cli(a->fd, "It has been %d milliseconds, and we got %d timer ticks\n",
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ast_tvdiff_ms(end, start), count);
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return CLI_SUCCESS;
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}
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static struct ast_cli_entry cli_timing[] = {
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AST_CLI_DEFINE(timing_test, "Run a timing test"),
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};
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int ast_timing_init(void)
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{
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return ast_cli_register_multiple(cli_timing, ARRAY_LEN(cli_timing));
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}
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