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Updated retry timer mechanism to incorporate smoothed RTT estimation.

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AoE now uses the retry timer mechanism.
This commit is contained in:
Michael Brown
2006-06-01 14:33:52 +00:00
parent 50415b3aca
commit 48fb6c6dc2
3 changed files with 102 additions and 60 deletions
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21
src/include/gpxe/retry.h
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@@ -9,28 +9,27 @@
#include <gpxe/list.h>
/** Effective maximum retry count for exponential backoff calculation */
#define BACKOFF_LIMIT 5
/** A retry timer */
struct retry_timer {
/** List of active timers */
struct list_head list;
/** Base timeout (in ticks) */
unsigned int base;
/** Retry count */
unsigned int retries;
/** Expiry time (in ticks) */
unsigned long expiry;
/** Timeout value (in ticks) */
unsigned long timeout;
/** Start time (in ticks) */
unsigned long start;
/** Timer expired callback
*
* @v timer Retry timer
* @v fail Failure indicator
*
* The timer will already be stopped when this method is
* called. The failure indicator will be True if the retry
* timeout has already exceeded @c MAX_TIMEOUT.
*/
void ( * expired ) ( struct retry_timer *timer );
void ( * expired ) ( struct retry_timer *timer, int over );
};
extern void start_timer ( struct retry_timer *timer );
extern void reset_timer ( struct retry_timer *timer );
extern void stop_timer ( struct retry_timer *timer );
#endif /* _GPXE_RETRY_H */