Package ch.bailu.gtk.gio

Class MemoryMonitor

java.lang.Object
ch.bailu.gtk.type.Type
ch.bailu.gtk.type.Pointer
ch.bailu.gtk.gobject.Object
ch.bailu.gtk.type.Interface
ch.bailu.gtk.gio.MemoryMonitor
All Implemented Interfaces:
PointerInterface
public class MemoryMonitor extends Interface
#GMemoryMonitor will monitor system memory and suggest to the application
when to free memory so as to leave more room for other applications.
It is implemented on Linux using the [Low Memory Monitor](https://gitlab.freedesktop.org/hadess/low-memory-monitor/)
([API documentation](https://hadess.pages.freedesktop.org/low-memory-monitor/)).

There is also an implementation for use inside Flatpak sandboxes.

Possible actions to take when the signal is received are:

- Free caches
- Save files that haven't been looked at in a while to disk, ready to be reopened when needed
- Run a garbage collection cycle
- Try and compress fragmented allocations
- Exit on idle if the process has no reason to stay around
- Call [`malloc_trim(3)`](man:malloc_trim) to return cached heap pages to
the kernel (if supported by your libc)

Note that some actions may not always improve system performance, and so
should be profiled for your application. `malloc_trim()`, for example, may
make future heap allocations slower (due to releasing cached heap pages back
to the kernel).

See #GMemoryMonitorWarningLevel for details on the various warning levels. 
<!-- language="C" -->
 static void
 warning_cb (GMemoryMonitor *m, GMemoryMonitorWarningLevel level)
 {
   g_debug ("Warning level: %d", level);
   if (warning_level > G_MEMORY_MONITOR_WARNING_LEVEL_LOW)
     drop_caches ();
 }
 
 static GMemoryMonitor *
 monitor_low_memory (void)
 {
   GMemoryMonitor *m;
   m = g_memory_monitor_dup_default ();
   g_signal_connect (G_OBJECT (m), "low-memory-warning",
                     G_CALLBACK (warning_cb), NULL);
   return m;
 }


Don't forget to disconnect the #GMemoryMonitor::low-memory-warning
signal, and unref the #GMemoryMonitor itself when exiting.

https://docs.gtk.org/gio/iface.MemoryMonitor.html