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/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "Main.hxx"
#ifdef _WIN32
#include "util/Compiler.h"
#include "Instance.hxx"
#include "system/FatalError.hxx"
#include <cstdlib>
#include <atomic>
#include <windows.h>
#include <tchar.h>
static int service_argc;
static char **service_argv;
static TCHAR service_name[] = _T("");
static std::atomic_bool running;
static SERVICE_STATUS_HANDLE service_handle;
static void WINAPI
service_main(DWORD argc, LPTSTR argv[]);
static constexpr SERVICE_TABLE_ENTRY service_registry[] = {
{service_name, service_main},
{nullptr, nullptr}
};
static void
service_notify_status(DWORD status_code)
{
SERVICE_STATUS current_status;
current_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
current_status.dwControlsAccepted = status_code == SERVICE_START_PENDING
? 0
: SERVICE_ACCEPT_SHUTDOWN | SERVICE_ACCEPT_STOP;
current_status.dwCurrentState = status_code;
current_status.dwWin32ExitCode = NO_ERROR;
current_status.dwCheckPoint = 0;
current_status.dwWaitHint = 1000;
SetServiceStatus(service_handle, ¤t_status);
}
static DWORD WINAPI
service_dispatcher([[maybe_unused]] DWORD control, [[maybe_unused]] DWORD event_type,
[[maybe_unused]] void *event_data, [[maybe_unused]] void *context)
{
switch (control) {
case SERVICE_CONTROL_SHUTDOWN:
case SERVICE_CONTROL_STOP:
global_instance->Break();
return NO_ERROR;
default:
return NO_ERROR;
}
}
static void WINAPI
service_main([[maybe_unused]] DWORD argc, [[maybe_unused]] LPTSTR argv[])
{
service_handle =
RegisterServiceCtrlHandlerEx(service_name,
service_dispatcher, nullptr);
if (service_handle == 0)
FatalSystemError("RegisterServiceCtrlHandlerEx() failed");
service_notify_status(SERVICE_START_PENDING);
mpd_main(service_argc, service_argv);
service_notify_status(SERVICE_STOPPED);
}
static BOOL WINAPI
console_handler(DWORD event)
{
switch (event) {
case CTRL_C_EVENT:
case CTRL_CLOSE_EVENT:
if (running.load()) {
// Recent msdn docs that process is terminated
// if this function returns TRUE.
// We initiate correct shutdown sequence (if possible).
// Once main() returns CRT will terminate our process
// regardless our thread is still active.
// If this did not happen within 3 seconds
// let's shutdown anyway.
global_instance->Break();
// Under debugger it's better to wait indefinitely
// to allow debugging of shutdown code.
Sleep(IsDebuggerPresent() ? INFINITE : 3000);
}
// If we're not running main loop there is no chance for
// clean shutdown.
std::exit(EXIT_FAILURE);
return TRUE;
default:
return FALSE;
}
}
int win32_main(int argc, char *argv[])
{
service_argc = argc;
service_argv = argv;
if (StartServiceCtrlDispatcher(service_registry))
return 0; /* run as service successefully */
const DWORD error_code = GetLastError();
if (error_code == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) {
/* running as console app */
running.store(false);
SetConsoleTitle(_T("Music Player Daemon"));
SetConsoleCtrlHandler(console_handler, TRUE);
return mpd_main(argc, argv);
}
FatalSystemError("StartServiceCtrlDispatcher() failed", error_code);
}
void win32_app_started()
{
if (service_handle != 0)
service_notify_status(SERVICE_RUNNING);
else
running.store(true);
}
void win32_app_stopping()
{
if (service_handle != 0)
service_notify_status(SERVICE_STOP_PENDING);
else
running.store(false);
}
#endif
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