/* Prune entries older than 3 seconds from the route cache */
void prune_route_cache(void* arg)
{
// This will store the next item in the linked list of hashmap entries
hashmap_item_t next_item;
// This will store a pointer to the route data struct
route_data_t route_data;
hashmap_item_t item;
// Get the first item in the hashmap (first in the chronological sense)
semaphore_P(route_cache_sem);
item = hashmap_get_first(route_cache);
// Go through all the items until we arrive at one that isn't ready for deletion
while (item != NULL)
{
// Get the next item ahead of time, in case we delete this item
next_item = hashmap_get_next(item);
// Get the value of the hashmap, which is a route_data struct
route_data = (route_data_t) hashmap_item_get_value(item);
// Check if the entry is more than 3 seconds old
if ((ticks - route_data->time_found) * PERIOD/MILLISECOND > 3000)
{
//printf("Deleting key %d\n", hashmap_item_get_key(item));
// Delete the route data struct
delete_route_data(route_data);
// Run hashmap delete, which will delete the hashmap_item struct (i.e. "item")
hashmap_delete(route_cache, hashmap_item_get_key(item));
}
else
{
// If the entry wasn't ready for deletion, then we can end (since the
// linked list is maintained in chronological order of insertion)
break;
}
// If we deleted the item, move to the next one
item = next_item;
}
semaphore_V(route_cache_sem);
// Once we're done, register the alarm to run again in 3 seconds
register_alarm(3000, &prune_route_cache, NULL);
}
struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int icase)
{
struct cache_entry *ce;
lazy_init_name_hash(istate);
ce = hashmap_get_from_hash(&istate->name_hash,
memihash(name, namelen), NULL);
while (ce) {
if (same_name(ce, name, namelen, icase))
return ce;
ce = hashmap_get_next(&istate->name_hash, ce);
}
return NULL;
}
/*
* Read stdin line by line and print result of commands to stdout:
*
* hash key -> strhash(key) memhash(key) strihash(key) memihash(key)
* put key value -> NULL / old value
* get key -> NULL / value
* remove key -> NULL / old value
* iterate -> key1 value1\nkey2 value2\n...
* size -> tablesize numentries
*
* perfhashmap method rounds -> test hashmap.[ch] performance
*/
int main(int argc, char *argv[])
{
char line[1024];
struct hashmap map;
int icase;
/* init hash map */
icase = argc > 1 && !strcmp("ignorecase", argv[1]);
hashmap_init(&map, (hashmap_cmp_fn) (icase ? test_entry_cmp_icase
: test_entry_cmp), 0);
/* process commands from stdin */
while (fgets(line, sizeof(line), stdin)) {
char *cmd, *p1 = NULL, *p2 = NULL;
int l1 = 0, l2 = 0, hash = 0;
struct test_entry *entry;
/* break line into command and up to two parameters */
cmd = strtok(line, DELIM);
/* ignore empty lines */
if (!cmd || *cmd == '#')
continue;
p1 = strtok(NULL, DELIM);
if (p1) {
l1 = strlen(p1);
hash = icase ? strihash(p1) : strhash(p1);
p2 = strtok(NULL, DELIM);
if (p2)
l2 = strlen(p2);
}
if (!strcmp("hash", cmd) && l1) {
/* print results of different hash functions */
printf("%u %u %u %u\n", strhash(p1), memhash(p1, l1),
strihash(p1), memihash(p1, l1));
} else if (!strcmp("add", cmd) && l1 && l2) {
/* create entry with key = p1, value = p2 */
entry = alloc_test_entry(hash, p1, l1, p2, l2);
/* add to hashmap */
hashmap_add(&map, entry);
} else if (!strcmp("put", cmd) && l1 && l2) {
/* create entry with key = p1, value = p2 */
entry = alloc_test_entry(hash, p1, l1, p2, l2);
/* add / replace entry */
entry = hashmap_put(&map, entry);
/* print and free replaced entry, if any */
puts(entry ? get_value(entry) : "NULL");
free(entry);
} else if (!strcmp("get", cmd) && l1) {
/* lookup entry in hashmap */
entry = hashmap_get_from_hash(&map, hash, p1);
/* print result */
if (!entry)
puts("NULL");
while (entry) {
puts(get_value(entry));
entry = hashmap_get_next(&map, entry);
}
} else if (!strcmp("remove", cmd) && l1) {
/* setup static key */
struct hashmap_entry key;
hashmap_entry_init(&key, hash);
/* remove entry from hashmap */
entry = hashmap_remove(&map, &key, p1);
/* print result and free entry*/
puts(entry ? get_value(entry) : "NULL");
free(entry);
} else if (!strcmp("iterate", cmd)) {
struct hashmap_iter iter;
hashmap_iter_init(&map, &iter);
while ((entry = hashmap_iter_next(&iter)))
printf("%s %s\n", entry->key, get_value(entry));
} else if (!strcmp("size", cmd)) {
/* print table sizes */
printf("%u %u\n", map.tablesize, map.size);
} else if (!strcmp("intern", cmd) && l1) {
/* test that strintern works */
const char *i1 = strintern(p1);
const char *i2 = strintern(p1);
if (strcmp(i1, p1))
printf("strintern(%s) returns %s\n", p1, i1);
else if (i1 == p1)
printf("strintern(%s) returns input pointer\n", p1);
else if (i1 != i2)
printf("strintern(%s) != strintern(%s)", i1, i2);
else
printf("%s\n", i1);
} else if (!strcmp("perfhashmap", cmd) && l1 && l2) {
perf_hashmap(atoi(p1), atoi(p2));
} else {
printf("Unknown command %s\n", cmd);
}
}
hashmap_free(&map, 1);
return 0;
}
