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authorDenis Krjuchkov <alcohold@gmail.com>2010-09-20 18:28:08 -0700
committerMax Kellermann <max@duempel.org>2010-09-23 20:42:33 +0200
commite8ebb1af91435674784dcbbc3207331fcdac7458 (patch)
tree9a5a88a8704396a3c3e617a26cc8f905b75cfc8f /src
parent9fa3d7c4fa57dbc24a8e80b1bf1be9e2033133c8 (diff)
downloadmpd-e8ebb1af91435674784dcbbc3207331fcdac7458.tar.gz
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main: Add Windows Service support
I've added PIPE_EVENT_SHUTDOWN because calling g_main_loop_quit() do not work when called from another thread. Main thread was sleeping in g_poll() so I needed some way to wake it up. By some strange reason call close(event_pipe[0]) in event_pipe_deinit() hangs. In current implementation that code never reached so that was not a problem :-) I've added a conditional to leave event_pipe[0] open on Win32.
Diffstat (limited to '')
-rw-r--r--src/event_pipe.c3
-rw-r--r--src/event_pipe.h3
-rw-r--r--src/main.c28
-rw-r--r--src/main.h41
-rw-r--r--src/main_win32.c154
5 files changed, 228 insertions, 1 deletions
diff --git a/src/event_pipe.c b/src/event_pipe.c
index af6517cd4..286256f96 100644
--- a/src/event_pipe.c
+++ b/src/event_pipe.c
@@ -116,7 +116,10 @@ void event_pipe_deinit(void)
g_source_remove(event_pipe_source_id);
g_io_channel_unref(event_channel);
+#ifndef WIN32
+ /* By some strange reason this call hangs on Win32 */
close(event_pipe[0]);
+#endif
close(event_pipe[1]);
}
diff --git a/src/event_pipe.h b/src/event_pipe.h
index 6c3d8c169..923544bf4 100644
--- a/src/event_pipe.h
+++ b/src/event_pipe.h
@@ -44,6 +44,9 @@ enum pipe_event {
/** a hardware mixer plugin has detected a change */
PIPE_EVENT_MIXER,
+ /** shutdown requested */
+ PIPE_EVENT_SHUTDOWN,
+
PIPE_EVENT_MAX
};
diff --git a/src/main.c b/src/main.c
index c93a3f615..34310927d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -269,8 +269,26 @@ idle_event_emitted(void)
client_manager_idle_add(flags);
}
+/**
+ * event_pipe callback function for PIPE_EVENT_SHUTDOWN
+ */
+static void
+shutdown_event_emitted(void)
+{
+ g_main_loop_quit(main_loop);
+}
+
int main(int argc, char *argv[])
{
+#ifdef WIN32
+ return win32_main(argc, argv);
+#else
+ return mpd_main(argc, argv);
+#endif
+}
+
+int mpd_main(int argc, char *argv[])
+{
struct options options;
clock_t start;
bool create_db;
@@ -324,6 +342,7 @@ int main(int argc, char *argv[])
event_pipe_init();
event_pipe_register(PIPE_EVENT_IDLE, idle_event_emitted);
+ event_pipe_register(PIPE_EVENT_SHUTDOWN, shutdown_event_emitted);
path_global_init();
glue_mapper_init();
@@ -392,10 +411,17 @@ int main(int argc, char *argv[])
playlist_state_restore() */
pc_update_audio();
- /* run the main loop */
+#ifdef WIN32
+ win32_app_started();
+#endif
+ /* run the main loop */
g_main_loop_run(main_loop);
+#ifdef WIN32
+ win32_app_stopping();
+#endif
+
/* cleanup */
g_main_loop_unref(main_loop);
diff --git a/src/main.h b/src/main.h
index c1d3f3621..9b9cba018 100644
--- a/src/main.h
+++ b/src/main.h
@@ -28,4 +28,45 @@ extern GMainLoop *main_loop;
extern GCond *main_cond;
+/**
+ * A entry point for application.
+ * On non-Windows platforms this is called directly from main()
+ * On Windows platform this is called from win32_main()
+ * after doing some initialization.
+ */
+int mpd_main(int argc, char *argv[]);
+
+#ifdef WIN32
+
+/**
+ * If program is run as windows service performs nessesary initialization
+ * and then calls mpd_main() with specified arguments.
+ * If program is run as a regular application calls mpd_main() immediately.
+ */
+int
+win32_main(int argc, char *argv[]);
+
+/**
+ * When running as a service reports to service control manager
+ * that our service is started.
+ * When running as a console application enables console handler that will
+ * trigger PIPE_EVENT_SHUTDOWN when user closes console window
+ * or presses Ctrl+C.
+ * This function should be called just before entering main loop.
+ */
+void
+win32_app_started(void);
+
+/**
+ * When running as a service reports to service control manager
+ * that our service is about to stop.
+ * When running as a console application enables console handler that will
+ * catch all shutdown requests and ignore them.
+ * This function should be called just after leaving main loop.
+ */
+void
+win32_app_stopping(void);
+
+#endif
+
#endif
diff --git a/src/main_win32.c b/src/main_win32.c
new file mode 100644
index 000000000..b2d6a0d12
--- /dev/null
+++ b/src/main_win32.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2003-2010 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 "config.h"
+#include "main.h"
+
+#ifdef WIN32
+
+#include "event_pipe.h"
+
+#include <glib.h>
+
+#define WINVER 0x0501
+#include <windows.h>
+
+static int service_argc;
+static char **service_argv;
+static char service_name[] = "";
+static BOOL ignore_console_events;
+static SERVICE_STATUS_HANDLE service_handle;
+
+static void WINAPI
+service_main(DWORD argc, CHAR *argv[]);
+
+static SERVICE_TABLE_ENTRY service_registry[] = {
+ {service_name, service_main},
+ {NULL, NULL}
+};
+
+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, &current_status);
+}
+
+static DWORD WINAPI
+service_dispatcher(G_GNUC_UNUSED DWORD control, G_GNUC_UNUSED DWORD event_type,
+ G_GNUC_UNUSED void *event_data, G_GNUC_UNUSED void *context)
+{
+ switch (control) {
+ case SERVICE_CONTROL_SHUTDOWN:
+ case SERVICE_CONTROL_STOP:
+ event_pipe_emit(PIPE_EVENT_SHUTDOWN);
+ return NO_ERROR;
+ default:
+ return NO_ERROR;
+ }
+}
+
+static void WINAPI
+service_main(G_GNUC_UNUSED DWORD argc, G_GNUC_UNUSED CHAR *argv[])
+{
+ DWORD error_code;
+ gchar* error_message;
+
+ service_handle =
+ RegisterServiceCtrlHandlerEx(service_name,
+ service_dispatcher, NULL);
+
+ if (service_handle == 0) {
+ error_code = GetLastError();
+ error_message = g_win32_error_message(error_code);
+ g_error("RegisterServiceCtrlHandlerEx() failed: %s",
+ error_message);
+ }
+
+ 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 (!ignore_console_events)
+ event_pipe_emit(PIPE_EVENT_SHUTDOWN);
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+int win32_main(int argc, char *argv[])
+{
+ DWORD error_code;
+ gchar* error_message;
+
+ service_argc = argc;
+ service_argv = argv;
+
+ if (StartServiceCtrlDispatcher(service_registry))
+ return 0; /* run as service successefully */
+
+ error_code = GetLastError();
+ if (error_code == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) {
+ /* running as console app */
+ SetConsoleTitle("Music Player Daemon");
+ ignore_console_events = TRUE;
+ SetConsoleCtrlHandler(console_handler, TRUE);
+ return mpd_main(argc, argv);
+ }
+
+ error_message = g_win32_error_message(error_code);
+ g_error("StartServiceCtrlDispatcher() failed: %s", error_message);
+}
+
+void win32_app_started()
+{
+ if (service_handle != 0)
+ service_notify_status(SERVICE_RUNNING);
+ else
+ ignore_console_events = FALSE;
+}
+
+void win32_app_stopping()
+{
+ if (service_handle != 0)
+ service_notify_status(SERVICE_STOP_PENDING);
+ else
+ ignore_console_events = TRUE;
+}
+
+#endif