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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
*
* License: GPL (version 3 or any later version).
* See LICENSE for details.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/* repl5_replica_hash.c */
#include "repl5.h"
#include "plhash.h"
/* global data */
static PLHashTable *s_hash;
static Slapi_RWLock *s_lock;
struct repl_enum_data
{
FNEnumReplica fn;
void *arg;
};
/* Forward declarations */
static PRIntn replica_destroy_hash_entry(PLHashEntry *he, PRIntn index, void *arg);
static PRIntn replica_enumerate(PLHashEntry *he, PRIntn index, void *hash_data);
int
replica_init_name_hash()
{
/* allocate table */
s_hash = PL_NewHashTable(0, PL_HashString, PL_CompareStrings,
PL_CompareValues, NULL, NULL);
if (s_hash == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_init_name_hash: "
"failed to allocate hash table; NSPR error - %d\n",
PR_GetError());
return -1;
}
/* create lock */
s_lock = slapi_new_rwlock();
if (s_lock == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_init_name_hash: "
"failed to create lock; NSPR error - %d\n",
PR_GetError());
replica_destroy_name_hash();
return -1;
}
return 0;
}
void
replica_destroy_name_hash()
{
/* destroy the content */
PL_HashTableEnumerateEntries(s_hash, replica_destroy_hash_entry, NULL);
if (s_hash)
PL_HashTableDestroy(s_hash);
if (s_lock)
slapi_destroy_rwlock(s_lock);
}
int
replica_add_by_name(const char *name, Replica *replica)
{
if (name == NULL || replica == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_add_by_name: NULL argument\n");
return -1;
}
if (s_hash == NULL || s_lock == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_add_by_name: "
"replica hash is not initialized\n");
return -1;
}
slapi_rwlock_wrlock(s_lock);
/* make sure that the name is unique */
if (PL_HashTableLookup(s_hash, name) != NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_add_by_name: "
"replica with name (%s) already in the hash\n",
name);
slapi_rwlock_unlock(s_lock);
return -1;
}
/* add replica */
if (PL_HashTableAdd(s_hash, name, replica) == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_add_by_name: "
"failed to add replica with name (%s); NSPR error - %d\n",
name, PR_GetError());
slapi_rwlock_unlock(s_lock);
return -1;
}
slapi_rwlock_unlock(s_lock);
return 0;
}
int
replica_delete_by_name(const char *name)
{
Replica *replica;
if (name == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_delete_by_name: "
"NULL argument\n");
return -1;
}
if (s_hash == NULL || s_lock == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_delete_by_name: "
"replica hash is not initialized\n");
return -1;
}
slapi_rwlock_wrlock(s_lock);
/* locate object */
replica = (Replica *)PL_HashTableLookup(s_hash, name);
if (replica == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_delete_by_name: "
"replica with name (%s) is not in the hash.\n",
name);
slapi_rwlock_unlock(s_lock);
return -1;
}
/* remove from hash */
PL_HashTableRemove(s_hash, name);
slapi_rwlock_unlock(s_lock);
return 0;
}
Replica *
replica_get_by_name(const char *name)
{
Replica *replica;
if (name == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_get_by_name: "
"NULL argument\n");
return NULL;
}
if (s_hash == NULL || s_lock == NULL) {
slapi_log_err(SLAPI_LOG_ERR, repl_plugin_name, "replica_get_by_name: "
"replica hash is not initialized\n");
return NULL;
}
slapi_rwlock_rdlock(s_lock);
/* locate object */
replica = (Replica *)PL_HashTableLookup(s_hash, name);
if (replica == NULL) {
slapi_rwlock_unlock(s_lock);
return NULL;
}
slapi_rwlock_unlock(s_lock);
return replica;
}
void
replica_enumerate_replicas(FNEnumReplica fn, void *arg)
{
struct repl_enum_data data;
PR_ASSERT(fn);
data.fn = fn;
data.arg = arg;
slapi_rwlock_wrlock(s_lock);
PL_HashTableEnumerateEntries(s_hash, replica_enumerate, &data);
slapi_rwlock_unlock(s_lock);
}
/* Helper functions */
/* this function called for each hash node during hash destruction */
static PRIntn
replica_destroy_hash_entry(PLHashEntry *he, PRIntn index __attribute__((unused)), void *arg __attribute__((unused)))
{
Replica *r;
if (he == NULL) {
return HT_ENUMERATE_NEXT;
}
r = (Replica *)he->value;
/* flash replica state to the disk */
replica_flush(r);
return HT_ENUMERATE_REMOVE;
}
static PRIntn
replica_enumerate(PLHashEntry *he, PRIntn index __attribute__((unused)), void *hash_data)
{
Replica *r;
struct repl_enum_data *data = hash_data;
r = (Replica *)he->value;
data->fn(r, data->arg);
return HT_ENUMERATE_NEXT;
}
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