Change the NSS and NSPR source tree to the new directory structure to be

mozilla/security/nss/lib/ckfw/hash.c

-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifdef DEBUG
-static const char CVS_ID[] = "@(#) $RCSfile: hash.c,v $ $Revision: 1.6 $ $Date: 2012/04/25 14:49:28 $";
-#endif /* DEBUG */
-
-/*
- * hash.c
- *
- * This is merely a couple wrappers around NSPR's PLHashTable, using
- * the identity hash and arena-aware allocators.  The reason I did
- * this is that hash tables are used in a few places throughout the
- * NSS Cryptoki Framework in a fairly stereotyped way, and this allows
- * me to pull the commonalities into one place.  Should we ever want
- * to change the implementation, it's all right here.
- */
-
-#ifndef CK_T
-#include "ck.h"
-#endif /* CK_T */
-
-/*
- * nssCKFWHash
- *
- *  nssCKFWHash_Create
- *  nssCKFWHash_Destroy
- *  nssCKFWHash_Add
- *  nssCKFWHash_Remove
- *  nssCKFWHash_Count
- *  nssCKFWHash_Exists
- *  nssCKFWHash_Lookup
- *  nssCKFWHash_Iterate
- */
-
-struct nssCKFWHashStr {
-  NSSCKFWMutex *mutex;
-
-  /*
-   * The invariant that mutex protects is:
-   *   The count accurately reflects the hashtable state.
-   */
-
-  PLHashTable *plHashTable;
-  CK_ULONG count;
-};
-
-static PLHashNumber
-nss_ckfw_identity_hash
-(
-  const void *key
-)
-{
-  PRUint32 i = (PRUint32)key;
-  PR_ASSERT(sizeof(PLHashNumber) == sizeof(PRUint32));
-  return (PLHashNumber)i;
-}
-
-/*
- * nssCKFWHash_Create
- *
- */
-NSS_IMPLEMENT nssCKFWHash *
-nssCKFWHash_Create
-(
-  NSSCKFWInstance *fwInstance,
-  NSSArena *arena,
-  CK_RV *pError
-)
-{
-  nssCKFWHash *rv;
-
-#ifdef NSSDEBUG
-  if (!pError) {
-    return (nssCKFWHash *)NULL;
-  }
-
-  if( PR_SUCCESS != nssArena_verifyPointer(arena) ) {
-    *pError = CKR_ARGUMENTS_BAD;
-    return (nssCKFWHash *)NULL;
-  }
-#endif /* NSSDEBUG */
-
-  rv = nss_ZNEW(arena, nssCKFWHash);
-  if (!rv) {
-    *pError = CKR_HOST_MEMORY;
-    return (nssCKFWHash *)NULL;
-  }
-
-  rv->mutex = nssCKFWInstance_CreateMutex(fwInstance, arena, pError);
-  if (!rv->mutex) {
-    if( CKR_OK == *pError ) {
-      (void)nss_ZFreeIf(rv);
-      *pError = CKR_GENERAL_ERROR;
-    }
-    return (nssCKFWHash *)NULL;
-  }
-
-  rv->plHashTable = PL_NewHashTable(0, nss_ckfw_identity_hash, 
-    PL_CompareValues, PL_CompareValues, &nssArenaHashAllocOps, arena);
-  if (!rv->plHashTable) {
-    (void)nssCKFWMutex_Destroy(rv->mutex);
-    (void)nss_ZFreeIf(rv);
-    *pError = CKR_HOST_MEMORY;
-    return (nssCKFWHash *)NULL;
-  }
-
-  rv->count = 0;
-
-  return rv;
-}
-
-/*
- * nssCKFWHash_Destroy
- *
- */
-NSS_IMPLEMENT void
-nssCKFWHash_Destroy
-(
-  nssCKFWHash *hash
-)
-{
-  (void)nssCKFWMutex_Destroy(hash->mutex);
-  PL_HashTableDestroy(hash->plHashTable);
-  (void)nss_ZFreeIf(hash);
-}
-
-/*
- * nssCKFWHash_Add
- *
- */
-NSS_IMPLEMENT CK_RV
-nssCKFWHash_Add
-(
-  nssCKFWHash *hash,
-  const void *key,
-  const void *value
-)
-{
-  CK_RV error = CKR_OK;
-  PLHashEntry *he;
-
-  error = nssCKFWMutex_Lock(hash->mutex);
-  if( CKR_OK != error ) {
-    return error;
-  }
-  
-  he = PL_HashTableAdd(hash->plHashTable, key, (void *)value);
-  if (!he) {
-    error = CKR_HOST_MEMORY;
-  } else {
-    hash->count++;
-  }
-
-  (void)nssCKFWMutex_Unlock(hash->mutex);
-
-  return error;
-}
-
-/*
- * nssCKFWHash_Remove
- *
- */
-NSS_IMPLEMENT void
-nssCKFWHash_Remove
-(
-  nssCKFWHash *hash,
-  const void *it
-)
-{
-  PRBool found;
-
-  if( CKR_OK != nssCKFWMutex_Lock(hash->mutex) ) {
-    return;
-  }
-
-  found = PL_HashTableRemove(hash->plHashTable, it);
-  if( found ) {
-    hash->count--;
-  }
-
-  (void)nssCKFWMutex_Unlock(hash->mutex);
-  return;
-}
-
-/*
- * nssCKFWHash_Count
- *
- */
-NSS_IMPLEMENT CK_ULONG
-nssCKFWHash_Count
-(
-  nssCKFWHash *hash
-)
-{
-  CK_ULONG count;
-
-  if( CKR_OK != nssCKFWMutex_Lock(hash->mutex) ) {
-    return (CK_ULONG)0;
-  }
-
-  count = hash->count;
-
-  (void)nssCKFWMutex_Unlock(hash->mutex);
-
-  return count;
-}
-
-/*
- * nssCKFWHash_Exists
- *
- */
-NSS_IMPLEMENT CK_BBOOL
-nssCKFWHash_Exists
-(
-  nssCKFWHash *hash,
-  const void *it
-)
-{
-  void *value;
-
-  if( CKR_OK != nssCKFWMutex_Lock(hash->mutex) ) {
-    return CK_FALSE;
-  }
-
-  value = PL_HashTableLookup(hash->plHashTable, it);
-
-  (void)nssCKFWMutex_Unlock(hash->mutex);
-
-  if (!value) {
-    return CK_FALSE;
-  } else {
-    return CK_TRUE;
-  }
-}
-
-/*
- * nssCKFWHash_Lookup
- *
- */
-NSS_IMPLEMENT void *
-nssCKFWHash_Lookup
-(
-  nssCKFWHash *hash,
-  const void *it
-)
-{
-  void *rv;
-
-  if( CKR_OK != nssCKFWMutex_Lock(hash->mutex) ) {
-    return (void *)NULL;
-  }
-
-  rv = PL_HashTableLookup(hash->plHashTable, it);
-
-  (void)nssCKFWMutex_Unlock(hash->mutex);
-
-  return rv;
-}
-
-struct arg_str {
-  nssCKFWHashIterator fcn;
-  void *closure;
-};
-
-static PRIntn
-nss_ckfwhash_enumerator
-(
-  PLHashEntry *he,
-  PRIntn index,
-  void *arg
-)
-{
-  struct arg_str *as = (struct arg_str *)arg;
-  as->fcn(he->key, he->value, as->closure);
-  return HT_ENUMERATE_NEXT;
-}
-
-/*
- * nssCKFWHash_Iterate
- *
- * NOTE that the iteration function will be called with the hashtable locked.
- */
-NSS_IMPLEMENT void
-nssCKFWHash_Iterate
-(
-  nssCKFWHash *hash,
-  nssCKFWHashIterator fcn,
-  void *closure
-)
-{
-  struct arg_str as;
-  as.fcn = fcn;
-  as.closure = closure;
-
-  if( CKR_OK != nssCKFWMutex_Lock(hash->mutex) ) {
-    return;
-  }
-
-  PL_HashTableEnumerateEntries(hash->plHashTable, nss_ckfwhash_enumerator, &as);
-
-  (void)nssCKFWMutex_Unlock(hash->mutex);
-
-  return;
-}