GMemoryMonitor
GMemoryMonitor — Memory usage monitor
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Object Hierarchy
GEnum
╰── GMemoryMonitorWarningLevel
GInterface
╰── GMemoryMonitor
Prerequisites
GMemoryMonitor requires
GInitable and GObject.
Includes
#include <gio/gio.h>
Description
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
(API documentation).
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
See GMemoryMonitorWarningLevel for details on the various warning levels.
Don't forget to disconnect the “low-memory-warning”
signal, and unref the GMemoryMonitor itself when exiting.
Functions
g_memory_monitor_dup_default ()
GMemoryMonitor *
g_memory_monitor_dup_default (void);
Gets a reference to the default GMemoryMonitor for the system.
Returns
a new reference to the default GMemoryMonitor.
[transfer full]
Since: 2.64
Types and Values
GMemoryMonitor
typedef struct _GMemoryMonitor GMemoryMonitor;
GMemoryMonitor monitors system memory and indicates when
the system is low on memory.
Since: 2.64
struct GMemoryMonitorInterface
struct GMemoryMonitorInterface {
void (*low_memory_warning) (GMemoryMonitor *monitor,
GMemoryMonitorWarningLevel level);
};
The virtual function table for GMemoryMonitor.
Since: 2.64
enum GMemoryMonitorWarningLevel
Memory availability warning levels.
Note that because new values might be added, it is recommended that applications check
GMemoryMonitorWarningLevel as ranges, for example:
Since: 2.64
G_MEMORY_MONITOR_EXTENSION_POINT_NAME
#define G_MEMORY_MONITOR_EXTENSION_POINT_NAME "gio-memory-monitor"
Extension point for memory usage monitoring functionality.
See Extending GIO.
Since: 2.64
Signal Details
The “low-memory-warning” signal
void
user_function (GMemoryMonitor *monitor,
GMemoryMonitorWarningLevel level,
gpointer user_data)
Emitted when the system is running low on free memory. The signal
handler should then take the appropriate action depending on the
warning level. See the GMemoryMonitorWarningLevel documentation for
details.
Flags: Run Last
Since: 2.64