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-rw-r--r--src/smooth_refresh.h104
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diff --git a/src/smooth_refresh.h b/src/smooth_refresh.h
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+++ b/src/smooth_refresh.h
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+#ifndef _PROCMAN_SMOOTH_REFRESH
+#define _PROCMAN_SMOOTH_REFRESH
+
+#include <glib.h>
+#include <mateconf/mateconf-client.h>
+
+#include <string>
+
+using std::string;
+
+
+
+class SmoothRefresh
+{
+public:
+
+ /*
+ smooth_refresh_new
+
+ @config_interval : pointer to config_interval so we can observe
+ config_interval changes.
+
+ @return : initialized SmoothRefresh
+ */
+ SmoothRefresh();
+
+ ~SmoothRefresh();
+
+ /*
+ smooth_refresh_reset
+
+ Resets state and re-read config_interval
+ */
+ void reset();
+
+ /*
+ smooth_refresh_get
+
+ Computes the new refresh_interval so that CPU usage is lower than
+ SMOOTH_REFRESH_PCPU.
+
+ @new_interval : where the new refresh_interval is stored.
+
+ @return : TRUE is refresh_interval has changed. The new refresh_interval
+ is stored in @new_interval. Else FALSE;
+ */
+ bool get(guint &new_interval);
+
+
+ static const string KEY;
+ static const bool KEY_DEFAULT_VALUE;
+
+private:
+
+ unsigned get_own_cpu_usage();
+
+ static void status_changed(MateConfClient *client,
+ guint cnxn_id,
+ MateConfEntry *entry,
+ gpointer user_data);
+
+ void load_mateconf_value(MateConfValue* value = NULL);
+
+ /*
+ fuzzy logic:
+ - decrease refresh interval only if current CPU% and last CPU%
+ are higher than PCPU_LO
+ - increase refresh interval only if current CPU% and last CPU%
+ are higher than PCPU_HI
+
+ */
+
+ enum
+ {
+ PCPU_HI = 22,
+ PCPU_LO = 18
+ };
+
+ /*
+ -self : procman's PID (so we call getpid() only once)
+
+ -interval : current refresh interval
+
+ -config_interval : pointer to the configuration refresh interval.
+ Used to watch configuration changes
+
+ -interval >= -config_interval
+
+ -last_pcpu : to avoid spikes, the last CPU%. See PCPU_{LO,HI}
+
+ -last_total_time:
+ -last_cpu_time: Save last cpu and process times to compute CPU%
+ */
+
+ bool active;
+ guint connection;
+ guint interval;
+ unsigned last_pcpu;
+ guint64 last_total_time;
+ guint64 last_cpu_time;
+};
+
+
+#endif /* _PROCMAN_SMOOTH_REFRESH */