79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
#include <ccan/mem/mem.h>
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#include <gossipd/broadcast.h>
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struct queued_message {
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/* Broadcast index. */
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u64 index;
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/* Serialized payload */
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const u8 *payload;
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};
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struct broadcast_state *new_broadcast_state(tal_t *ctx)
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{
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struct broadcast_state *bstate = tal(ctx, struct broadcast_state);
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uintmap_init(&bstate->broadcasts);
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/* Skip 0 because we initialize peers with 0 */
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bstate->next_index = 1;
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return bstate;
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}
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static void destroy_queued_message(struct queued_message *msg,
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struct broadcast_state *bstate)
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{
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uintmap_del(&bstate->broadcasts, msg->index);
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}
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static struct queued_message *new_queued_message(const tal_t *ctx,
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struct broadcast_state *bstate,
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const u8 *payload TAKES,
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u64 index)
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{
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struct queued_message *msg = tal(ctx, struct queued_message);
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msg->payload = tal_dup_arr(msg, u8, payload, tal_len(payload), 0);
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msg->index = index;
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uintmap_add(&bstate->broadcasts, index, msg);
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tal_add_destructor2(msg, destroy_queued_message, bstate);
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return msg;
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}
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bool replace_broadcast(const tal_t *ctx,
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struct broadcast_state *bstate,
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u64 *index,
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const u8 *payload TAKES)
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{
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struct queued_message *msg;
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bool evicted = false;
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msg = uintmap_get(&bstate->broadcasts, *index);
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if (msg) {
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tal_free(msg);
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evicted = true;
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}
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/* Now add the message to the queue */
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msg = new_queued_message(ctx, bstate, payload, bstate->next_index++);
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*index = msg->index;
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return evicted;
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}
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const u8 *next_broadcast(struct broadcast_state *bstate, u64 *last_index)
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{
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struct queued_message *m;
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m = uintmap_after(&bstate->broadcasts, last_index);
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if (m)
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return m->payload;
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return NULL;
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}
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const u8 *get_broadcast(struct broadcast_state *bstate, u64 msgidx)
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{
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struct queued_message *m;
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m = uintmap_get(&bstate->broadcasts, msgidx);
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if (m)
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return m->payload;
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return NULL;
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}
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