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[bottlenecks.git] / rubbos / app / httpd-2.0.64 / srclib / apr-util / dbm / sdbm / sdbm_private.h

diff --git a/rubbos/app/httpd-2.0.64/srclib/apr-util/dbm/sdbm/sdbm_private.h b/rubbos/app/httpd-2.0.64/srclib/apr-util/dbm/sdbm/sdbm_private.h
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+/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
+ * applicable.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * sdbm - ndbm work-alike hashed database library
+ * based on Per-Ake Larson's Dynamic Hashing algorithms. BIT 18 (1978).
+ * author: oz@nexus.yorku.ca
+ */
+
+#ifndef SDBM_PRIVATE_H
+#define SDBM_PRIVATE_H
+
+#include "apr.h"
+#include "apr_pools.h"
+#include "apr_file_io.h"
+#include "apr_errno.h" /* for apr_status_t */
+
+#if 0
+/* if the block/page size is increased, it breaks perl apr_sdbm_t compatibility */
+#define DBLKSIZ 16384
+#define PBLKSIZ 8192
+#define PAIRMAX 8008                   /* arbitrary on PBLKSIZ-N */
+#else
+#define DBLKSIZ 4096
+#define PBLKSIZ 1024
+#define PAIRMAX 1008                   /* arbitrary on PBLKSIZ-N */
+#endif
+#define SPLTMAX        10                      /* maximum allowed splits */
+
+/* for apr_sdbm_t.flags */
+#define SDBM_RDONLY            0x1    /* data base open read-only */
+#define SDBM_SHARED            0x2    /* data base open for sharing */
+#define SDBM_SHARED_LOCK       0x4    /* data base locked for shared read */
+#define SDBM_EXCLUSIVE_LOCK    0x8    /* data base locked for write */
+
+struct apr_sdbm_t {
+    apr_pool_t *pool;
+    apr_file_t *dirf;                 /* directory file descriptor */
+    apr_file_t *pagf;                 /* page file descriptor */
+    apr_int32_t flags;                /* status/error flags, see below */
+    long maxbno;                      /* size of dirfile in bits */
+    long curbit;                      /* current bit number */
+    long hmask;                               /* current hash mask */
+    long blkptr;                      /* current block for nextkey */
+    int  keyptr;                      /* current key for nextkey */
+    long blkno;                               /* current page to read/write */
+    long pagbno;                      /* current page in pagbuf */
+    char pagbuf[PBLKSIZ];             /* page file block buffer */
+    long dirbno;                      /* current block in dirbuf */
+    char dirbuf[DBLKSIZ];             /* directory file block buffer */
+    int  lckcnt;                       /* number of calls to sdbm_lock */
+};
+
+
+#define sdbm_hash apu__sdbm_hash
+#define sdbm_nullitem apu__sdbm_nullitem
+
+extern const apr_sdbm_datum_t sdbm_nullitem;
+
+long sdbm_hash(const char *str, int len);
+
+/*
+ * zero the cache
+ */
+#define SDBM_INVALIDATE_CACHE(db, finfo) \
+    do { db->dirbno = (!finfo.size) ? 0 : -1; \
+         db->pagbno = -1; \
+         db->maxbno = (long)(finfo.size * BYTESIZ); \
+    } while (0);
+
+#endif /* SDBM_PRIVATE_H */