mirror of https://github.com/asterisk/asterisk
- Convert chan_iax2 to use the timing API - Convert usage of timing in the core to use the timing API instead of using DAHDI directly - Make a change to the timing API to add the set_rate() function - change the timing core to use a rwlock - merge a timing implementation, res_timing_dahdi Basic testing was successful using res_timing_dahdi git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@122523 65c4cc65-6c06-0410-ace0-fbb531ad65f31.6.1
Russell Bryant
17 years ago
parent
a68a160b75
commit
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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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* Russell Bryant <russell@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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/*!
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* \file
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* \author Russell Bryant <russell@digium.com>
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*
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* \brief DAHDI timing interface
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*/
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/*** MODULEINFO
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<depend>dahdi</depend>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$");
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <math.h>
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#include "asterisk/module.h"
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#include "asterisk/timing.h"
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#include "asterisk/dahdi.h"
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#include "asterisk/utils.h"
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static void *timing_funcs_handle;
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static int dahdi_timer_open(void);
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static void dahdi_timer_close(int handle);
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static int dahdi_timer_set_rate(int handle, unsigned int rate);
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static void dahdi_timer_ack(int handle, unsigned int quantity);
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static int dahdi_timer_enable_continuous(int handle);
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static int dahdi_timer_disable_continuous(int handle);
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static enum ast_timing_event dahdi_timer_get_event(int handle);
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static struct ast_timing_functions dahdi_timing_functions = {
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.timer_open = dahdi_timer_open,
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.timer_close = dahdi_timer_close,
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.timer_set_rate = dahdi_timer_set_rate,
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.timer_ack = dahdi_timer_ack,
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.timer_enable_continuous = dahdi_timer_enable_continuous,
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.timer_disable_continuous = dahdi_timer_disable_continuous,
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.timer_get_event = dahdi_timer_get_event,
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};
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static int dahdi_timer_open(void)
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{
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return open("/dev/dahdi/timer", O_RDWR);
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}
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static void dahdi_timer_close(int handle)
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{
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close(handle);
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}
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static int dahdi_timer_set_rate(int handle, unsigned int rate)
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{
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int samples;
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/* DAHDI timers are configured using a number of samples,
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* based on an 8 kHz sample rate. */
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samples = (unsigned int) roundf((8000.0 / ((float) rate)));
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if (ioctl(handle, DAHDI_TIMERCONFIG, &samples)) {
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ast_log(LOG_ERROR, "Failed to configure DAHDI timing fd for %u sample timer ticks\n",
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samples);
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return -1;
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}
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return 0;
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}
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static void dahdi_timer_ack(int handle, unsigned int quantity)
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{
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ioctl(handle, DAHDI_TIMERACK, &quantity);
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}
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static int dahdi_timer_enable_continuous(int handle)
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{
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int flags = 1;
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return ioctl(handle, DAHDI_TIMERPING, &flags) ? -1 : 0;
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}
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static int dahdi_timer_disable_continuous(int handle)
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{
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int flags = -1;
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return ioctl(handle, DAHDI_TIMERPONG, &flags) ? -1 : 0;
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}
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static enum ast_timing_event dahdi_timer_get_event(int handle)
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{
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int res;
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int event;
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res = ioctl(handle, DAHDI_GETEVENT, &event);
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if (res) {
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event = DAHDI_EVENT_TIMER_EXPIRED;
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}
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switch (event) {
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case DAHDI_EVENT_TIMER_PING:
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return AST_TIMING_EVENT_CONTINUOUS;
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case DAHDI_EVENT_TIMER_EXPIRED:
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default:
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return AST_TIMING_EVENT_EXPIRED;
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}
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}
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static int dahdi_test_timer(void)
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{
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int fd;
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int x = 160;
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fd = open("/dev/dahdi/timer", O_RDWR);
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if (fd < 0) {
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return -1;
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}
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if (ioctl(fd, DAHDI_TIMERCONFIG, &x)) {
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ast_log(LOG_ERROR, "You have DAHDI built and drivers loaded, but the DAHDI timer test failed to set DAHDI_TIMERCONFIG to %d.\n", x);
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close(fd);
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return -1;
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}
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if ((x = ast_wait_for_input(fd, 300)) < 0) {
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ast_log(LOG_ERROR, "You have DAHDI built and drivers loaded, but the DAHDI timer could not be polled during the DAHDI timer test.\n");
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close(fd);
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return -1;
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}
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if (!x) {
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const char dahdi_timer_error[] = {
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"Asterisk has detected a problem with your DAHDI configuration and will shutdown for your protection. You have options:"
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"\n\t1. You only have to compile DAHDI support into Asterisk if you need it. One option is to recompile without DAHDI support."
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"\n\t2. You only have to load DAHDI drivers if you want to take advantage of DAHDI services. One option is to unload DAHDI modules if you don't need them."
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"\n\t3. If you need DAHDI services, you must correctly configure DAHDI."
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};
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ast_log(LOG_ERROR, "%s\n", dahdi_timer_error);
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usleep(100);
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close(fd);
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return -1;
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}
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close(fd);
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return 0;
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}
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static int load_module(void)
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{
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if (dahdi_test_timer()) {
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return AST_MODULE_LOAD_DECLINE;
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}
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return (timing_funcs_handle = ast_install_timing_functions(&dahdi_timing_functions)) ?
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AST_MODULE_LOAD_SUCCESS : AST_MODULE_LOAD_DECLINE;
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}
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static int unload_module(void)
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{
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ast_uninstall_timing_functions(timing_funcs_handle);
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return 0;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "DAHDI Timing Interface");
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