void
sp_writer_free_block (ShmBlock * block)
{
shm_alloc_space_block_dec (block->ablock);
sp_shm_area_dec (block->pipe, block->area);
spalloc_free (ShmBlock, block);
}
static int
sp_shmbuf_dec (ShmPipe * self, ShmBuffer * buf, ShmBuffer * prev_buf)
{
buf->use_count--;
if (buf->use_count == 0) {
/* Remove from linked list */
if (prev_buf)
prev_buf->next = buf->next;
else
self->buffers = buf->next;
shm_alloc_space_block_dec (buf->block);
sp_shm_area_dec (self, buf->shm_area);
spalloc_free1 (sizeof (ShmBuffer) + sizeof (int) * buf->num_clients, buf);
return 0;
}
return 1;
}
static int
sp_shmbuf_dec (ShmPipe * self, ShmBuffer * buf, ShmBuffer * prev_buf,
ShmClient * client, void **tag)
{
int i;
int had_client = 0;
/**
* Remove client from the list of buffer users. Here we make sure that
* if a client closes connection but already decremented the use count
* for this buffer, but other clients didn't have time to decrement
* buffer will not be freed too early in sp_writer_close_client.
*/
for (i = 0; i < buf->num_clients; i++) {
if (buf->clients[i] == client->fd) {
buf->clients[i] = -1;
had_client = 1;
break;
}
}
assert (had_client);
buf->use_count--;
if (buf->use_count == 0) {
/* Remove from linked list */
if (prev_buf)
prev_buf->next = buf->next;
else
self->buffers = buf->next;
if (tag)
*tag = buf->tag;
shm_alloc_space_block_dec (buf->ablock);
sp_shm_area_dec (self, buf->shm_area);
spalloc_free1 (sizeof (ShmBuffer) + sizeof (int) * buf->num_clients, buf);
return 0;
}
return 1;
}