Initial Commit

database/apache/include/apr_anylock.h

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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/**
+ * @file apr_anylock.h
+ * @brief APR-Util transparent any lock flavor wrapper
+ */
+#ifndef APR_ANYLOCK_H
+#define APR_ANYLOCK_H
+
+#include "apr_proc_mutex.h"
+#include "apr_thread_mutex.h"
+#include "apr_thread_rwlock.h"
+
+/** Structure that may contain any APR lock type */
+typedef struct apr_anylock_t {
+    /** Indicates what type of lock is in lock */
+    enum tm_lock {
+        apr_anylock_none,           /**< None */
+        apr_anylock_procmutex,      /**< Process-based */
+        apr_anylock_threadmutex,    /**< Thread-based */
+        apr_anylock_readlock,       /**< Read lock */
+        apr_anylock_writelock       /**< Write lock */
+    } type;
+    /** Union of all possible APR locks */
+    union apr_anylock_u_t {
+        apr_proc_mutex_t *pm;       /**< Process mutex */
+#if APR_HAS_THREADS
+        apr_thread_mutex_t *tm;     /**< Thread mutex */
+        apr_thread_rwlock_t *rw;    /**< Read-write lock */
+#endif
+    } lock;
+} apr_anylock_t;
+
+#if APR_HAS_THREADS
+
+/** Lock an apr_anylock_t structure */
+#define APR_ANYLOCK_LOCK(lck)                \
+    (((lck)->type == apr_anylock_none)         \
+      ? APR_SUCCESS                              \
+      : (((lck)->type == apr_anylock_threadmutex)  \
+          ? apr_thread_mutex_lock((lck)->lock.tm)    \
+          : (((lck)->type == apr_anylock_procmutex)    \
+              ? apr_proc_mutex_lock((lck)->lock.pm)      \
+              : (((lck)->type == apr_anylock_readlock)     \
+                  ? apr_thread_rwlock_rdlock((lck)->lock.rw) \
+                  : (((lck)->type == apr_anylock_writelock)    \
+                      ? apr_thread_rwlock_wrlock((lck)->lock.rw) \
+                      : APR_EINVAL)))))
+
+#else /* APR_HAS_THREADS */
+
+#define APR_ANYLOCK_LOCK(lck)                \
+    (((lck)->type == apr_anylock_none)         \
+      ? APR_SUCCESS                              \
+          : (((lck)->type == apr_anylock_procmutex)    \
+              ? apr_proc_mutex_lock((lck)->lock.pm)      \
+                      : APR_EINVAL))
+
+#endif /* APR_HAS_THREADS */
+
+#if APR_HAS_THREADS
+
+/** Try to lock an apr_anylock_t structure */
+#define APR_ANYLOCK_TRYLOCK(lck)                \
+    (((lck)->type == apr_anylock_none)            \
+      ? APR_SUCCESS                                 \
+      : (((lck)->type == apr_anylock_threadmutex)     \
+          ? apr_thread_mutex_trylock((lck)->lock.tm)    \
+          : (((lck)->type == apr_anylock_procmutex)       \
+              ? apr_proc_mutex_trylock((lck)->lock.pm)      \
+              : (((lck)->type == apr_anylock_readlock)        \
+                  ? apr_thread_rwlock_tryrdlock((lck)->lock.rw) \
+                  : (((lck)->type == apr_anylock_writelock)       \
+                      ? apr_thread_rwlock_trywrlock((lck)->lock.rw) \
+                          : APR_EINVAL)))))
+
+#else /* APR_HAS_THREADS */
+
+#define APR_ANYLOCK_TRYLOCK(lck)                \
+    (((lck)->type == apr_anylock_none)            \
+      ? APR_SUCCESS                                 \
+          : (((lck)->type == apr_anylock_procmutex)       \
+              ? apr_proc_mutex_trylock((lck)->lock.pm)      \
+                          : APR_EINVAL))
+
+#endif /* APR_HAS_THREADS */
+
+#if APR_HAS_THREADS
+
+/** Unlock an apr_anylock_t structure */
+#define APR_ANYLOCK_UNLOCK(lck)              \
+    (((lck)->type == apr_anylock_none)         \
+      ? APR_SUCCESS                              \
+      : (((lck)->type == apr_anylock_threadmutex)  \
+          ? apr_thread_mutex_unlock((lck)->lock.tm)  \
+          : (((lck)->type == apr_anylock_procmutex)    \
+              ? apr_proc_mutex_unlock((lck)->lock.pm)    \
+              : ((((lck)->type == apr_anylock_readlock) || \
+                  ((lck)->type == apr_anylock_writelock))    \
+                  ? apr_thread_rwlock_unlock((lck)->lock.rw)   \
+                      : APR_EINVAL))))
+
+#else /* APR_HAS_THREADS */
+
+#define APR_ANYLOCK_UNLOCK(lck)              \
+    (((lck)->type == apr_anylock_none)         \
+      ? APR_SUCCESS                              \
+          : (((lck)->type == apr_anylock_procmutex)    \
+              ? apr_proc_mutex_unlock((lck)->lock.pm)    \
+                      : APR_EINVAL))
+
+#endif /* APR_HAS_THREADS */
+
+#endif /* !APR_ANYLOCK_H */