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// Copyright (C) 2013-2015 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
/// @file
/// @brief Full callout library
///
/// This is source of a test library for various test (LibraryManager and
/// HooksManager). The characteristics of the library produced from this
/// file are:
///
/// The characteristics of this library are:
///
/// - All three framework functions are supplied (version(), load() and
/// unload()), with unload() creating a marker file. The test code checks
/// for the presence of this file, so verifying that unload() has been run.
///
/// - One standard and two non-standard callouts are supplied, with the latter
/// being registered by the load() function.
///
/// All callouts do trivial calculations, the result of all being called in
/// sequence being
///
/// @f[ ((7 * data_1) - data_2) * data_3 @f]
///
/// ...where data_1, data_2 and data_3 are the values passed in arguments of
/// the same name to the three callouts (data_1 passed to hookpt_one, data_2
/// to hookpt_two etc.) and the result is returned in the argument "result".
#include <config.h>
#include <hooks/hooks.h>
#include <hooks/tests/marker_file.h>
#include <fstream>
using namespace isc::hooks;
extern "C" {
// Callouts
int
context_create(CalloutHandle& handle) {
handle.setContext("result", static_cast<int>(7));
handle.setArgument("result", static_cast<int>(7));
return (0);
}
// First callout adds the passed "data_1" argument to the initialized context
// value of 7. (Note that the value set by context_create is accessed through
// context and not the argument, so checking that context is correctly passed
// between callouts in the same library.)
int
hookpt_one(CalloutHandle& handle) {
int data;
handle.getArgument("data_1", data);
int result;
handle.getArgument("result", result);
result *= data;
handle.setArgument("result", result);
return (0);
}
// Second callout subtracts the passed value of data_2 from the current
// running total.
static int
hook_nonstandard_two(CalloutHandle& handle) {
int data;
handle.getArgument("data_2", data);
int result;
handle.getArgument("result", result);
result -= data;
handle.setArgument("result", result);
return (0);
}
// Final callout multiplies the current running total by data_3.
static int
hook_nonstandard_three(CalloutHandle& handle) {
int data;
handle.getArgument("data_3", data);
int result;
handle.getArgument("result", result);
result *= data;
handle.setArgument("result", result);
return (0);
}
// Framework functions
int
version() {
return (KEA_HOOKS_VERSION);
}
int
load(LibraryHandle& handle) {
// Initialize if the main image was statically linked
#ifdef USE_STATIC_LINK
hooksStaticLinkInit();
#endif
// Register the non-standard functions
handle.registerCallout("hookpt_two", hook_nonstandard_two);
handle.registerCallout("hookpt_three", hook_nonstandard_three);
return (0);
}
int
unload() {
// Create the marker file.
std::fstream marker;
marker.open(MARKER_FILE, std::fstream::out);
marker.close();
return (0);
}
};
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