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#include <protocol.h>
static Hashmap *hash;
int ssinit()
{
if (hash == NULL) {
hash = Hashmap_create(NULL, NULL);
check(hash != NULL, "unable to create hashmap");
}
return 0;
error:
return -1;
}
int sscreate(char *key)
{
int rc = 0;
check(ssinit() == 0, "ssinit failed");
// 1. create bstring from 'key'.
bstring k = bfromcstr(key);
check(k != NULL, "key creation failed");
// 2. allocate fresh Stats.
Stats *st = Stats_create();
check(st != NULL, "stats creation failed");
// 3. add to hashmap.
rc = Hashmap_set(hash, k, st);
check(rc == 0, "hashmap set failed");
return 0;
error:
return -1;
}
int ssdelete(char *key)
{
check(hash != NULL, "hash not initialized");
// 1. create bstring from 'key'.
bstring k = bfromcstr(key);
check(k != NULL, "key creation failed");
// 2. check if key exists.
Stats *st = (Stats *) Hashmap_get(hash, k);
if (st == NULL) {
// key does not exists.
return 0;
}
// 3. delete key.
st = (Stats *) Hashmap_delete(hash, k);
check(st != NULL, "hash key delete failed");
// 4. clean up the stats for this key.
free(st);
return 0;
error:
return -1;
}
int sssample(char *key, double s)
{
check(hash != NULL, "hash not initialized");
// 1. create bstring from 'key'.
bstring k = bfromcstr(key);
check(k != NULL, "key creation failed");
// 2. try to get Stats for key.
Stats *st = (Stats *) Hashmap_get(hash, k);
check(st != NULL, "stats not found for key");
// 3. sample!
Stats_sample(st, s);
return 0;
error:
return -1;
}
double ssmean(char *key)
{
check(hash != NULL, "hash not initialized");
// 1. create bstring from 'key'.
bstring k = bfromcstr(key);
// 2. try to Stats for key.
Stats *st = (Stats *) Hashmap_get(hash, k);
check(st != NULL, "stats not found for key");
// 3. get mean.
double m = Stats_mean(st);
return m;
error:
return -1;
}
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