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wifi_drv: fix timer scheduling

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The context of timer are now inserted correctly and the actual timer
triggering the exection of each context is always programmed if the
head of the timer list changes.

Fixes #1326.
This commit is contained in:
Josef Söntgen 2014-12-15 14:35:30 +01:00 committed by Christian Helmuth
parent 4c7a5bb388
commit b557fb13f9
2 changed files with 30 additions and 22 deletions
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3
repos/dde_linux/src/lib/wifi/include/list.h
View File

@ -53,6 +53,9 @@ class Lx::List : private Genode::List<LT>
if (at == first()) {
prepend(le);
return;
} else if (!at) {
append(le);
return;
}
for (LT *l = first(); l; l = l->next())

49
repos/dde_linux/src/lib/wifi/timer.cc
View File

@ -80,6 +80,11 @@ class Lx::Timer
/**
* Program the first timer in the list
*
* The first timer is programmed if the 'programmed' flag was not set
* before. The second timer is flagged as not programmed as
* 'Timer::trigger_once' invalidates former registered one-shot
* timeouts.
*/
void _program_first_timer()
{
@ -87,40 +92,40 @@ class Lx::Timer
if (!ctx)
return;
if (!ctx->programmed) {
ctx->programmed = true;
if (ctx->programmed)
return;
/* calculate relative microseconds for trigger */
unsigned long us = ctx->timeout > jiffies ?
jiffies_to_msecs(ctx->timeout - jiffies) * 1000 : 0;
_timer_conn.trigger_once(us);
}
/* calculate relative microseconds for trigger */
unsigned long us = ctx->timeout > jiffies ?
jiffies_to_msecs(ctx->timeout - jiffies) * 1000 : 0;
_timer_conn.trigger_once(us);
ctx->programmed = true;
/* possibly programmed successor must be reprogrammed later */
if (Context *next = ctx->next())
next->programmed = false;
}
/**
* Schedule timer
*
* Add the context to the scheduling list depending on its timeout
* and reprogram the first timer.
*/
void _schedule_timer(Context *ctx, unsigned long expires)
{
_list.remove(ctx);
ctx->timeout = expires;
ctx->pending = true;
ctx->timeout = expires;
ctx->pending = true;
ctx->programmed = false;
Context *c = _list.first();
do {
if (!c) {
_list.insert(ctx);
Context *c;
for (c = _list.first(); c; c = c->next())
if (ctx->timeout <= c->timeout)
break;
}
if (ctx->timeout < c->timeout) {
_list.insert_before(ctx, c);
break;
}
c = c->next();
} while (c);
_list.insert_before(ctx, c);
_program_first_timer();
}