llheartbeat.h

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#ifndef LL_LLHEARTBEAT_H
#define LL_LLHEARTBEAT_H

#include "linden_common.h"

#include "lltimer.h"

// Note: Win32 does not support the heartbeat/smackdown system;
//   heartbeat-delivery turns into a no-op there.

class LLHeartbeat
{
public:
        // secs_between_heartbeat: after a heartbeat is successfully delivered,
        //   we suppress sending more for this length of time.
        // aggressive_heartbeat_panic_secs: if we've been failing to
        //   successfully deliver heartbeats for this length of time then
        //   we block for a while until we're really sure we got one delivered.
        // aggressive_heartbeat_max_blocking_secs: this is the length of
        //   time we block for when we're aggressively ensuring that a 'panic'
        //   heartbeat was delivered.
        LLHeartbeat(F32 secs_between_heartbeat = 5.0f,
                    F32 aggressive_heartbeat_panic_secs = 10.0f,
                    F32 aggressive_heartbeat_max_blocking_secs = 4.0f);
        ~LLHeartbeat();

        bool send(F32 timeout_sec = 0.0f);
        void setSuppressed(bool is_suppressed);

private:
        int rawSend();
        int rawSendWithTimeout(F32 timeout_sec);
        F32 mSecsBetweenHeartbeat;
        F32 mAggressiveHeartbeatPanicSecs;
        F32 mAggressiveHeartbeatMaxBlockingSecs;
        bool mSuppressed;
        LLTimer mBeatTimer;
        LLTimer mPanicTimer;
        LLTimer mTimeoutTimer;
};

#endif // LL_HEARTBEAT_H

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