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Diffstat (limited to 'src/IOThread.cxx')
-rw-r--r-- | src/IOThread.cxx | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/IOThread.cxx b/src/IOThread.cxx new file mode 100644 index 000000000..dbe206af7 --- /dev/null +++ b/src/IOThread.cxx @@ -0,0 +1,119 @@ +/* + * Copyright (C) 2003-2013 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 "IOThread.hxx" +#include "thread/Mutex.hxx" +#include "thread/Cond.hxx" +#include "event/Loop.hxx" +#include "system/FatalError.hxx" + +#include <glib.h> + +#include <assert.h> + +static struct { + Mutex mutex; + Cond cond; + + EventLoop *loop; + GThread *thread; +} io; + +void +io_thread_run(void) +{ + assert(io_thread_inside()); + assert(io.loop != NULL); + + io.loop->Run(); +} + +static gpointer +io_thread_func(gcc_unused gpointer arg) +{ + /* lock+unlock to synchronize with io_thread_start(), to be + sure that io.thread is set */ + io.mutex.lock(); + io.mutex.unlock(); + + io_thread_run(); + return NULL; +} + +void +io_thread_init(void) +{ + assert(io.loop == NULL); + assert(io.thread == NULL); + + io.loop = new EventLoop(); +} + +void +io_thread_start() +{ + assert(io.loop != NULL); + assert(io.thread == NULL); + + const ScopeLock protect(io.mutex); + +#if GLIB_CHECK_VERSION(2,32,0) + io.thread = g_thread_new("io", io_thread_func, nullptr); +#else + GError *error = nullptr; + io.thread = g_thread_create(io_thread_func, NULL, true, &error); + if (io.thread == NULL) + FatalError(error); +#endif +} + +void +io_thread_quit(void) +{ + assert(io.loop != NULL); + + io.loop->Break(); +} + +void +io_thread_deinit(void) +{ + if (io.thread != NULL) { + io_thread_quit(); + + g_thread_join(io.thread); + } + + delete io.loop; +} + +EventLoop & +io_thread_get() +{ + assert(io.loop != nullptr); + + return *io.loop; +} + +bool +io_thread_inside(void) +{ + return io.thread != NULL && g_thread_self() == io.thread; +} |