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[retry] Rewrite unrelicensable portions of retry.c

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-03-05 11:04:47 +00:00
parent bfbb2b8f1c
commit 47ad8fc1ba
4 changed files with 72 additions and 41 deletions
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36
src/include/ipxe/retry.h
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@@ -7,14 +7,14 @@
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/list.h>
/** Default timeout value */
/** Default minimum timeout value (in ticks) */
#define DEFAULT_MIN_TIMEOUT ( TICKS_PER_SEC / 4 )
/** Limit after which the timeout will be deemed permanent */
/** Default maximum timeout value (in ticks) */
#define DEFAULT_MAX_TIMEOUT ( 10 * TICKS_PER_SEC )
/** A retry timer */
@@ -25,16 +25,18 @@ struct retry_timer {
unsigned int running;
/** Timeout value (in ticks) */
unsigned long timeout;
/** Minimum timeout value (in ticks)
/** Minimum timeout value (in ticks), or zero to use default
*
* A value of zero means "use default timeout."
* The timeout will never be reduced below this value.
*/
unsigned long min_timeout;
/** Maximum timeout value before failure (in ticks)
unsigned long min;
/** Maximum timeout value (in ticks), or zero to use default
*
* A value of zero means "use default timeout."
* The timeout will be deemed permanent (according to the
* failure indicator passed to expired()) when it exceeds this
* value.
*/
unsigned long max_timeout;
unsigned long max;
/** Start time (in ticks) */
unsigned long start;
/** Retry count */
@@ -46,7 +48,7 @@ struct retry_timer {
*
* 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.
* timeout has already exceeded @c max_timeout.
*/
void ( * expired ) ( struct retry_timer *timer, int over );
/** Reference counter
@@ -109,4 +111,18 @@ timer_running ( struct retry_timer *timer ) {
return ( timer->running );
}
/**
* Set minimum and maximum timeouts
*
* @v timer Retry timer
* @v min Minimum timeout (in ticks), or zero to use default
* @v max Maximum timeout (in ticks), or zero to use default
*/
static inline __attribute__ (( always_inline )) void
set_timer_limits ( struct retry_timer *timer, unsigned long min,
unsigned long max ) {
timer->min = min;
timer->max = max;
}
#endif /* _IPXE_RETRY_H */