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API change to the announcement module: an annoucement can now be registered without a value. Such announcements are never transmitted to neighbors, until the announcement's value is set.

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This commit is contained in:
adamdunkels 2010-03-25 08:49:56 +00:00
parent 20d9f70b09
commit 2559e27414
3 changed files with 32 additions and 25 deletions
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29
core/net/rime/announcement.c
View File

@ -33,7 +33,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: announcement.c,v 1.4 2010/03/19 13:16:11 adamdunkels Exp $
* $Id: announcement.c,v 1.5 2010/03/25 08:49:56 adamdunkels Exp $
*/
/**
@ -60,15 +60,16 @@ announcement_init(void)
}
/*---------------------------------------------------------------------------*/
void
announcement_register(struct announcement *a, uint16_t id, uint16_t value,
announcement_register(struct announcement *a, uint16_t id,
announcement_callback_t callback)
{
a->id = id;
a->value = value;
a->has_value = 0;
a->callback = callback;
list_add(announcements, a);
if(observer_callback) {
observer_callback(a->id, a->value, 0, ANNOUNCEMENT_BUMP);
observer_callback(a->id, a->has_value,
a->value, 0, ANNOUNCEMENT_BUMP);
}
}
/*---------------------------------------------------------------------------*/
@ -79,21 +80,24 @@ announcement_remove(struct announcement *a)
}
/*---------------------------------------------------------------------------*/
void
announcement_set_value(struct announcement *a, uint16_t value)
announcement_remove_value(struct announcement *a)
{
uint16_t oldvalue = a->value;
a->value = value;
a->has_value = 0;
if(observer_callback) {
observer_callback(a->id, value, oldvalue, ANNOUNCEMENT_NOBUMP);
observer_callback(a->id, 0, 0, 0, ANNOUNCEMENT_NOBUMP);
}
}
/*---------------------------------------------------------------------------*/
void
announcement_set_id(struct announcement *a, uint16_t id)
announcement_set_value(struct announcement *a, uint16_t value)
{
a->id = id;
uint16_t oldvalue = a->value;
a->has_value = 1;
a->value = value;
if(observer_callback) {
observer_callback(a->id, a->value, a->value, ANNOUNCEMENT_NOBUMP);
observer_callback(a->id, a->has_value,
value, oldvalue, ANNOUNCEMENT_NOBUMP);
}
}
/*---------------------------------------------------------------------------*/
@ -101,7 +105,8 @@ void
announcement_bump(struct announcement *a)
{
if(observer_callback) {
observer_callback(a->id, a->value, a->value, ANNOUNCEMENT_BUMP);
observer_callback(a->id, a->has_value,
a->value, a->value, ANNOUNCEMENT_BUMP);
}
}
/*---------------------------------------------------------------------------*/

21
core/net/rime/announcement.h
View File

@ -54,7 +54,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: announcement.h,v 1.7 2010/03/19 13:16:11 adamdunkels Exp $
* $Id: announcement.h,v 1.8 2010/03/25 08:49:56 adamdunkels Exp $
*/
/**
@ -86,6 +86,7 @@ struct announcement {
uint16_t id;
uint16_t value;
announcement_callback_t callback;
uint8_t has_value;
};
/**
@ -96,7 +97,6 @@ struct announcement {
* \brief Register an announcement
* \param a A pointer to a struct announcement
* \param id The identifying number of the announcement
* \param value The initial value of the announcement
* \param callback A pointer to a callback function that is called
* when an announcement is heard
*
@ -112,7 +112,7 @@ struct announcement {
*
*/
void announcement_register(struct announcement *a,
uint16_t id, uint16_t value,
uint16_t id,
announcement_callback_t callback);
/**
@ -140,18 +140,18 @@ void announcement_remove(struct announcement *a);
*/
void announcement_set_value(struct announcement *a, uint16_t value);
/**
* \brief Set the identifier of an announcement
* \brief Remove the value of an announcement
* \param a A pointer to a struct announcement that has
* previously been registered
*
* This function sets the identifier of an announcement
* that has previously been registered with
* This function removes the value of an announcement that
* has previously been registered with
* announcement_register().
*
*/
void announcement_set_id(struct announcement *a, uint16_t id);
void announcement_remove_value(struct announcement *a);
/**
* \brief Bump an announcement
@ -244,8 +244,9 @@ enum {
ANNOUNCEMENT_BUMP,
};
typedef void (* announcement_observer)(uint16_t id, uint16_t newvalue,
uint16_t oldvalue, uint8_t bump);
typedef void (* announcement_observer)(uint16_t id, uint8_t has_value,
uint16_t newvalue, uint16_t oldvalue,
uint8_t bump);
/**
* \brief Register an observer callback with the announcement module

7
core/net/rime/broadcast-announcement.c
View File

@ -33,7 +33,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: broadcast-announcement.c,v 1.2 2010/03/22 11:32:29 fros4943 Exp $
* $Id: broadcast-announcement.c,v 1.3 2010/03/25 08:49:56 adamdunkels Exp $
*/
/**
@ -104,7 +104,7 @@ send_adv(void *ptr)
packetbuf_clear();
adata = packetbuf_dataptr();
adata->num = 0;
for(a = announcement_list(); a != NULL; a = a->next) {
for(a = announcement_list(); a != NULL && a->has_value; a = a->next) {
adata->data[adata->num].id = a->id;
adata->data[adata->num].value = a->value;
adata->num++;
@ -186,7 +186,8 @@ send_timer(void *ptr)
}
/*---------------------------------------------------------------------------*/
static void
new_announcement(uint16_t id, uint16_t newval, uint16_t oldval, uint8_t bump)
new_announcement(uint16_t id, uint8_t has_value,
uint16_t newval, uint16_t oldval, uint8_t bump)
{
if(bump == ANNOUNCEMENT_BUMP) {
c.current_interval = c.initial_interval;