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author | Brian Cully <bjc@kublai.com> | 2008-04-14 21:54:00 -0400 |
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committer | Brian Cully <github.20.shmit@spamgourmet.com> | 2008-04-14 21:54:00 -0400 |
commit | 79d65188b1c1578a36403c0e5756c81dcc93d816 (patch) | |
tree | 2903ed400cd0ebd13350397d402c1d9d5b9f869d /server/.svn/text-base/memdb.c.svn-base | |
parent | 6ba98a9f9f48e13738d9736cba9c45b5e94f42f2 (diff) | |
download | nastd-79d65188b1c1578a36403c0e5756c81dcc93d816.tar.gz nastd-79d65188b1c1578a36403c0e5756c81dcc93d816.zip |
Remove svn files
Diffstat (limited to 'server/.svn/text-base/memdb.c.svn-base')
-rw-r--r-- | server/.svn/text-base/memdb.c.svn-base | 501 |
1 files changed, 0 insertions, 501 deletions
diff --git a/server/.svn/text-base/memdb.c.svn-base b/server/.svn/text-base/memdb.c.svn-base deleted file mode 100644 index 501d0ef..0000000 --- a/server/.svn/text-base/memdb.c.svn-base +++ /dev/null @@ -1,501 +0,0 @@ -#include "conf.h" -#include "config.h" -#include "array.h" -#include "log.h" -#include "md5.h" -#include "memdb.h" -#include "thread.h" - -#include <errno.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> - -RCSID("$Id: memdb.c,v 1.27 2001/10/04 23:57:10 shmit Exp $"); - -#define HASHSIZE 1024 - -extern time_t cdb_mtime; - -enum _cachetype_t { C_DEL, C_UPD, C_TRYVAL, C_EXPIRE }; -typedef enum _cachetype_t cachetype_t; - -struct _mement_t { - char *key; - int keylen; - array_t *vals; - time_t *upd_time; - cachetype_t type; - void *typeval; -}; -typedef struct _mement_t mement_t; - -struct _cachent_t { - mement_t ent; - struct _cachent_t *next; -}; -typedef struct _cachent_t cachent_t; - -struct _counter_t { - float onemin, fivemin, fifteenmin; -}; -typedef struct _counter_t counter_t; - -extern short db_fieldcount; - -static cachent_t **memdb = NULL; -static int memdbsize; -static rw_mutex_t *memdb_lk = NULL; - -static int query_sec, add_sec, del_sec, upd_sec; -static counter_t queryrate; -static counter_t addrate; -static counter_t delrate; -static counter_t updrate; - -static unsigned int -hashkey(const char *key, int keylen) -{ - char md5hash[32]; - unsigned int rc; - - memset(md5hash, 0, sizeof(md5hash)); - md5_calc(md5hash, key, keylen, sizeof(md5hash)); - memcpy(&rc, md5hash, sizeof(rc)); - return (rc % HASHSIZE); -} - -static void -ent_delete(mement_t *ent) -{ - if (ent == NULL) - return; - - if (ent->key != NULL) - free(ent->key); - if (ent->vals != NULL) - array_delete(ent->vals); - if (ent->upd_time != NULL) - free(ent->upd_time); - if (ent->typeval != NULL) - free(ent->typeval); -} - -int -memdb_new() -{ - cachent_t **newdb; - int i; - int rc; - - log_info("Initialising memdb interface."); - - if (memdb_lk == NULL) { - memdb_lk = malloc(sizeof(rw_mutex_t)); - if (memdb_lk == NULL) { - log_err("Couldn't allocate memdb mutex: %s.", - strerror(errno)); - return -1; - } - rc = rw_mutex_new(memdb_lk); - if (rc) { - log_err("Couldn't initialise memdb mutex: %s.", - strerror(rc)); - return -1; - } - } - - newdb = malloc(HASHSIZE * sizeof(cachent_t *)); - if (newdb == NULL) { - log_err("Couldn't allocate new memdb: %s.", strerror(errno)); - return -1; - } - - for (i = 0; i < HASHSIZE; i++) - newdb[i] = NULL; - - rw_mutex_write_lock(memdb_lk); - if (memdb != NULL) - memdb_delete(memdb); - memdb = newdb; - rw_mutex_unlock(memdb_lk); - - query_sec = add_sec = del_sec = upd_sec = 0; - queryrate.onemin = queryrate.fivemin = queryrate.fifteenmin = 0; - addrate.onemin = addrate.fivemin = addrate.fifteenmin = 0; - delrate.onemin = delrate.fivemin = delrate.fifteenmin = 0; - updrate.onemin = updrate.fivemin = updrate.fifteenmin = 0; - memdbsize = 0; - - log_info("memdb interface initialised."); - return 0; -} - -void -memdb_delete() -{ - int i; - - if (memdb == NULL) - return; - - for (i = 0; i < HASHSIZE; i++) { - cachent_t *p; - - p = memdb[i]; - while (p != NULL) { - cachent_t *q; - - q = p->next; - ent_delete(&p->ent); - free(p); - p = q; - } - } - free(memdb); - memdb = NULL; -} - -int -memdb_add(const char *key, int keylen, array_t *vals) -{ - cachent_t *ent; - int hkey; - time_t curtime; - - ent = malloc(sizeof(cachent_t)); - if (ent == NULL) { - log_err("Couldn't create memdb entry for `%s': %s.", - key, strerror(errno)); - return -1; - } - ent->next = NULL; - ent->ent.key = NULL; - ent->ent.type = C_UPD; - ent->ent.typeval = NULL; - ent->ent.upd_time = NULL; - - ent->ent.key = malloc((keylen + 1) * sizeof(char)); - if (ent->ent.key == NULL) { - log_err("Couldn't create entry key for `%s': %s.", - key, strerror(errno)); - ent_delete(&ent->ent); - return -1; - } - memcpy(ent->ent.key, key, keylen); - ent->ent.keylen = keylen; - - ent->ent.vals = array_new(); - if (ent->ent.vals == NULL) { - ent_delete(&ent->ent); - return -1; - } - if (array_dup(ent->ent.vals, vals) == -1) { - ent_delete(&ent->ent); - return -1; - } - - ent->ent.upd_time = malloc(sizeof(time_t)); - if (ent->ent.upd_time == NULL) { - ent_delete(&ent->ent); - return -1; - } - curtime = time(NULL); - memcpy(ent->ent.upd_time, &curtime, sizeof(time_t)); - - /* Cache non-results for a minute. */ - if (vals->nitems == 0) { - time_t expire; - - ent->ent.type = C_EXPIRE; - ent->ent.typeval = malloc(sizeof(time_t)); - expire = time(NULL); - expire += config.null_cache_timeout; - memcpy(ent->ent.typeval, &expire, sizeof(time_t)); - } - - hkey = hashkey(key, keylen); - rw_mutex_write_lock(memdb_lk); - if (memdb[hkey] == NULL) { - memdb[hkey] = ent; - memdbsize++; - } else { - cachent_t *p, *q; - - p = memdb[hkey]; - q = NULL; - while (p->next != NULL && - !(keylen == p->ent.keylen && - memcmp(p->ent.key, key, p->ent.keylen) == 0)) { - q = p; - p = p->next; - } - if (keylen == p->ent.keylen && - memcmp(p->ent.key, key, keylen) == 0) { - /* Already in memdb. */ - - log_info("(add) %s already exists.", key); - - switch (p->ent.type) { - case C_EXPIRE: - case C_DEL: - /* - * Deletable entries. Trash 'em and - * add 'em. - */ - - if (q == NULL) - memdb[hkey] = ent; - else - q->next = ent; - ent->next = p->next; - - ent_delete(&p->ent); - free(p); - break; - default: - /* XXX: Do an update instead of an add. */ - } - } else { - p->next = ent; - memdbsize++; - } - } - - add_sec++; - rw_mutex_unlock(memdb_lk); - return 0; -} - -int -memdb_del(const char *key, int keylen) -{ - cachent_t *p; - int hkey; - - hkey = hashkey(key, keylen); - - rw_mutex_read_lock(memdb_lk); - p = memdb[hkey]; - while (p != NULL && - (keylen != p->ent.keylen || memcmp(p->ent.key, key, keylen))) - p = p->next; - - if (p == NULL) { - array_t *aa; - - /* - * Entry not found. We have to add it ourselves. - */ - rw_mutex_unlock(memdb_lk); - - aa = array_new(); - if (aa == NULL) - return -1; - if (memdb_add(key, keylen, aa) == -1) - return -1; - - /* - * The entry has been added - now go back and mark it - * for deletion. - */ - return memdb_del(key, keylen); - } - - rw_mutex_write_lock(memdb_lk); - if (p->ent.typeval != NULL) { - free(p->ent.typeval); - p->ent.typeval = NULL; - } - - p->ent.type = C_DEL; - if (p->ent.vals != NULL) - array_delete(p->ent.vals); - - del_sec++; - rw_mutex_unlock(memdb_lk); - - return 0; -} - -int -memdb_get(const char *key, int keylen, array_t *vals) -{ - cachent_t *p, *q; - int hkey; - - hkey = hashkey(key, keylen); - rw_mutex_read_lock(memdb_lk); - p = memdb[hkey]; - q = NULL; - while (p != NULL && - (keylen != p->ent.keylen || memcmp(p->ent.key, key, keylen))) { - q = p; - p = p->next; - } - - if (p == NULL) { - rw_mutex_unlock(memdb_lk); - return -1; - } - - switch (p->ent.type) { - case C_DEL: - rw_mutex_unlock(memdb_lk); - query_sec++; - return 0; - case C_EXPIRE: - if (p->ent.typeval != NULL) { - time_t now, expire; - - now = time(NULL); - expire = *((time_t *)p->ent.typeval); - if (now >= expire) { - ent_delete(&p->ent); - if (q != NULL) - q->next = p->next; - else - memdb[hkey] = p->next; - free(p); - rw_mutex_unlock(memdb_lk); - log_info("DEBUG: (get) %s has expired", key); - return -1; - } - } - break; - default: - if (p->ent.upd_time != NULL) { - time_t upd_time; - - upd_time = *p->ent.upd_time; - if (cdb_mtime > upd_time) { - ent_delete(&p->ent); - if (q != NULL) - q->next = p->next; - else - memdb[hkey] = p->next; - free(p); - rw_mutex_unlock(memdb_lk); - log_info("DEBUG: (get) %s is out of date", key); - return -1; - } - } - break; - } - - if (array_dup(vals, p->ent.vals) == -1) { - rw_mutex_unlock(memdb_lk); - return -1; - } - - rw_mutex_unlock(memdb_lk); - query_sec++; - return 0; -} - -int -memdb_upd(const char *key, int keylen, array_t *vals) -{ - cachent_t *p; - int hkey; - time_t curtime; - - /* First make sure that we have enough values. */ - if (vals->nitems != db_fieldcount) { - log_err("Update tried with wrong value count."); - return -1; - } - - hkey = hashkey(key, keylen); - rw_mutex_read_lock(memdb_lk); - p = memdb[hkey]; - while (p != NULL && - (keylen != p->ent.keylen || memcmp(p->ent.key, key, keylen))) - p = p->next; - - if (p == NULL) { - /* Entry not found. Add it ourselves. */ - rw_mutex_unlock(memdb_lk); - return memdb_add(key, keylen, vals); - } - rw_mutex_unlock(memdb_lk); - - /* Entry found, lets replace it with our copy. */ - - rw_mutex_write_lock(memdb_lk); - p->ent.type = C_UPD; - p->ent.typeval = NULL; - curtime = time(NULL); - memcpy(p->ent.upd_time, &curtime, sizeof(time_t)); - array_delete(p->ent.vals); - - p->ent.vals = array_new(); - if (p->ent.vals == NULL) { - rw_mutex_unlock(memdb_lk); - return -1; - } - - if (array_dup(p->ent.vals, vals) == -1) { - rw_mutex_unlock(memdb_lk); - return -1; - } - - upd_sec++; - rw_mutex_unlock(memdb_lk); - - return 0; -} - -int -memdb_stats(array_t *statarr) -{ - char buffer[512]; - - /* Convert q/m, q/5m, and q/15m into q/s. */ - snprintf(buffer, sizeof(buffer), "MEMDB get: %.2f, %.2f, %.2f", - queryrate.onemin, queryrate.fivemin, queryrate.fifteenmin); - if (array_add(statarr, strlen(buffer), buffer, ARRTERM) == -1) - return -1; - - snprintf(buffer, sizeof(buffer), "MEMDB add: %.2f, %.2f, %.2f", - addrate.onemin, addrate.fivemin, addrate.fifteenmin); - if (array_add(statarr, strlen(buffer), buffer, ARRTERM) == -1) - return -1; - - snprintf(buffer, sizeof(buffer), "MEMDB del: %.2f, %.2f, %.2f", - delrate.onemin, delrate.fivemin, delrate.fifteenmin); - if (array_add(statarr, strlen(buffer), buffer, ARRTERM) == -1) - return -1; - - snprintf(buffer, sizeof(buffer), "MEMDB upd: %.2f, %.2f, %.2f", - updrate.onemin, updrate.fivemin, updrate.fifteenmin); - if (array_add(statarr, strlen(buffer), buffer, ARRTERM) == -1) - return -1; - - snprintf(buffer, sizeof(buffer), "MEMDB total entries: %d", memdbsize); - return array_add(statarr, strlen(buffer), buffer, ARRTERM); -} - -void -memdb_collate() -{ - queryrate.onemin = ((queryrate.onemin * 59) + query_sec) / 60; - queryrate.fivemin = ((queryrate.fivemin * 299) + query_sec) / 300; - queryrate.fifteenmin = ((queryrate.fifteenmin * 899) + query_sec) / 900; - query_sec = 0; - - addrate.onemin = ((addrate.onemin * 59) + add_sec) / 60; - addrate.fivemin = ((addrate.fivemin * 299) + add_sec) / 300; - addrate.fifteenmin = ((addrate.fifteenmin * 899) + add_sec) / 900; - add_sec = 0; - - delrate.onemin = ((delrate.onemin * 59) + del_sec) / 60; - delrate.fivemin = ((delrate.fivemin * 299) + del_sec) / 300; - delrate.fifteenmin = ((delrate.fifteenmin * 899) + del_sec) / 900; - del_sec = 0; - - updrate.onemin = ((updrate.onemin * 59) + upd_sec) / 60; - updrate.fivemin = ((updrate.fivemin * 299) + upd_sec) / 300; - updrate.fifteenmin = ((updrate.fifteenmin * 899) + upd_sec) / 900; - upd_sec = 0; -} |