97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
/* Copyright (c) 2023, 2024, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is designed to work with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have either included with
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the program or referenced in the documentation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include "mysql_signal_handler_imp.h"
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#include <signal.h>
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#include "mysql/components/minimal_chassis.h" // mysql_components_handle_std_exception
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#include "mysql/components/service_implementation.h"
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#include "sql/signal_handler.h"
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constexpr auto MYSQL_SUCCESS = false;
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constexpr auto MYSQL_FAILURE = true;
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/**
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Implement the registration of the callback for a specific signal.
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@note Registration fails if there is already a registered callback for the
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same signal.
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@param signal_no signal to register for
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@param callback the callback to call
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@retval false success
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@retval true failure
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@sa mysql_service_host_application_signal_t
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*/
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DEFINE_BOOL_METHOD(my_signal_handler_imp::add,
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(int signal_no, my_signal_handler_callback_t callback)) {
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bool retval = MYSQL_SUCCESS;
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try {
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switch (signal_no) {
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case SIGSEGV:
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if (g_fatal_callback.load() != nullptr) return MYSQL_FAILURE;
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g_fatal_callback = callback;
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break;
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default:
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retval = MYSQL_FAILURE;
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break;
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}
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} catch (...) {
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mysql_components_handle_std_exception(__func__);
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}
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return retval;
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}
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/**
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Implement the de-registration of the callback for a specific signal
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@note If the callback is not registered before, un-registration fails.
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@param signal_no signal to register for
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@param callback the callback to call
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@retval false success
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@retval true failure
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@sa mysql_service_host_application_signal_t
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*/
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DEFINE_BOOL_METHOD(my_signal_handler_imp::remove,
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(int signal_no, my_signal_handler_callback_t callback)) {
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bool retval = MYSQL_SUCCESS;
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try {
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switch (signal_no) {
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case SIGSEGV:
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if (g_fatal_callback.load() == callback)
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g_fatal_callback = nullptr;
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else
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return MYSQL_FAILURE;
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break;
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default:
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retval = MYSQL_FAILURE;
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break;
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}
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} catch (...) {
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mysql_components_handle_std_exception(__func__);
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}
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return retval;
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}
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