From 1db1a6dad3209fa03221bb420665f04e8b6a8418 Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Mon, 29 May 2006 14:55:07 +0000 Subject: Added first sketch of a generic retry timer mechanism. The idea is to use these timer objects in AoE and UDP protocols (where there is no underlying retransmission mechanism) without requiring each protocol to implement its own individual retry logic. Eventually, we should be able to use the same timer code for TCP retransmissions as well. --- src/include/gpxe/retry.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 src/include/gpxe/retry.h (limited to 'src/include') diff --git a/src/include/gpxe/retry.h b/src/include/gpxe/retry.h new file mode 100644 index 000000000..8a9e2cf6f --- /dev/null +++ b/src/include/gpxe/retry.h @@ -0,0 +1,36 @@ +#ifndef _GPXE_RETRY_H +#define _GPXE_RETRY_H + +/** @file + * + * Retry timers + * + */ + +#include + +/** 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; + /** Timer expired callback + * + * @v timer Retry timer + */ + void ( * expired ) ( struct retry_timer *timer ); +}; + +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 */ -- cgit v1.2.3-55-g7522