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GlobalEvents: use g_idle_add() instead of WakeFD()

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Use the GMainLoop specific function to wake up the main loop.  This is
simpler and comes with very little overhead.
This commit is contained in:
Max Kellermann
2013-02-27 20:28:19 +01:00
parent fc0ad8674b
commit 6f2e1c2415
1 changed files with 5 additions and 28 deletions
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33
src/GlobalEvents.cxx
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@@ -19,21 +19,16 @@
#include "config.h"
#include "GlobalEvents.hxx"
#include "event/WakeFD.hxx"
#include "mpd_error.h"
#include <atomic>
#include <assert.h>
#include <glib.h>
#include <string.h>
#include <errno.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "global_events"
namespace GlobalEvents {
static WakeFD wake_fd;
static guint source_id;
static std::atomic_uint flags;
static Handler handlers[MAX];
@@ -52,13 +47,8 @@ InvokeGlobalEvent(GlobalEvents::Event event)
}
static gboolean
GlobalEventCallback(G_GNUC_UNUSED GIOChannel *source,
G_GNUC_UNUSED GIOCondition condition,
G_GNUC_UNUSED gpointer data)
GlobalEventCallback(G_GNUC_UNUSED gpointer data)
{
if (!GlobalEvents::wake_fd.Read())
return true;
const unsigned flags = GlobalEvents::flags.exchange(0);
for (unsigned i = 0; i < GlobalEvents::MAX; ++i)
@@ -66,32 +56,19 @@ GlobalEventCallback(G_GNUC_UNUSED GIOChannel *source,
/* invoke the event handler */
InvokeGlobalEvent(GlobalEvents::Event(i));
return true;
return false;
}
void
GlobalEvents::Initialize()
{
if (!wake_fd.Create())
MPD_ERROR("Couldn't open pipe: %s", strerror(errno));
#ifndef G_OS_WIN32
GIOChannel *channel = g_io_channel_unix_new(wake_fd.Get());
#else
GIOChannel *channel = g_io_channel_win32_new_socket(wake_fd.Get());
#endif
source_id = g_io_add_watch(channel, G_IO_IN,
GlobalEventCallback, NULL);
g_io_channel_unref(channel);
}
void
GlobalEvents::Deinitialize()
{
g_source_remove(source_id);
wake_fd.Destroy();
if (source_id != 0)
g_source_remove(source_id);
}
void
@@ -110,5 +87,5 @@ GlobalEvents::Emit(Event event)
const unsigned mask = 1u << unsigned(event);
if (GlobalEvents::flags.fetch_or(mask) == 0)
wake_fd.Write();
source_id = g_idle_add(GlobalEventCallback, nullptr);
}