e6b2e9a750
This patch adds 'const' tags to a number of Asterisk APIs where they are appropriate (where the API already demanded that the function argument not be modified, but the compiler was not informed of that fact). The list includes: - CLI command handlers - CLI command handler arguments - AGI command handlers - AGI command handler arguments - Dialplan application handler arguments - Speech engine API function arguments In addition, various file-scope and function-scope constant arrays got 'const' and/or 'static' qualifiers where they were missing. Review: https://reviewboard.asterisk.org/r/251/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@196072 65c4cc65-6c06-0410-ace0-fbb531ad65f3
126 lines
2.7 KiB
C
126 lines
2.7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@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 Wait for Ring Application
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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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 "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/lock.h"
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/*** DOCUMENTATION
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<application name="WaitForRing" language="en_US">
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<synopsis>
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Wait for Ring Application.
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</synopsis>
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<syntax>
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<parameter name="timeout" required="true" />
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</syntax>
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<description>
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<para>Returns <literal>0</literal> after waiting at least <replaceable>timeout</replaceable> seconds,
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and only after the next ring has completed. Returns <literal>0</literal> on success or
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<literal>-1</literal> on hangup.</para>
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</description>
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</application>
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***/
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static char *app = "WaitForRing";
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static int waitforring_exec(struct ast_channel *chan, const char *data)
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{
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struct ast_frame *f;
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int res = 0;
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double s;
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int ms;
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if (!data || (sscanf(data, "%lg", &s) != 1)) {
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ast_log(LOG_WARNING, "WaitForRing requires an argument (minimum seconds)\n");
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return 0;
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}
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ms = s * 1000.0;
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while (ms > 0) {
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ms = ast_waitfor(chan, ms);
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if (ms < 0) {
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res = ms;
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break;
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}
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if (ms > 0) {
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f = ast_read(chan);
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if (!f) {
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res = -1;
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break;
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}
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if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RING)) {
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ast_verb(3, "Got a ring but still waiting for timeout\n");
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}
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ast_frfree(f);
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}
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}
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/* Now we're really ready for the ring */
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if (!res) {
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ms = 99999999;
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while(ms > 0) {
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ms = ast_waitfor(chan, ms);
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if (ms < 0) {
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res = ms;
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break;
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}
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if (ms > 0) {
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f = ast_read(chan);
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if (!f) {
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res = -1;
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break;
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}
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if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RING)) {
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ast_verb(3, "Got a ring after the timeout\n");
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ast_frfree(f);
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break;
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}
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ast_frfree(f);
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}
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}
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}
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application_xml(app, waitforring_exec);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Waits until first ring after time");
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