feat:replace boost library with C++11 std library

third_party/apr/apr-1.6.5/locks/beos/proc_mutex.c

@@ -0,0 +1,206 @@
+/* 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.
+ */
+
+/*Read/Write locking implementation based on the MultiLock code from
+ * Stephen Beaulieu <hippo@be.com>
+ */
+ 
+#include "apr_arch_proc_mutex.h"
+#include "apr_strings.h"
+#include "apr_portable.h"
+
+static apr_status_t _proc_mutex_cleanup(void * data)
+{
+    apr_proc_mutex_t *lock = (apr_proc_mutex_t*)data;
+    if (lock->LockCount != 0) {
+        /* we're still locked... */
+    	while (atomic_add(&lock->LockCount , -1) > 1){
+    	    /* OK we had more than one person waiting on the lock so 
+    	     * the sem is also locked. Release it until we have no more
+    	     * locks left.
+    	     */
+            release_sem (lock->Lock);
+    	}
+    }
+    delete_sem(lock->Lock);
+    return APR_SUCCESS;
+}    
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_create(apr_proc_mutex_t **mutex,
+                                                const char *fname,
+                                                apr_lockmech_e mech,
+                                                apr_pool_t *pool)
+{
+    apr_proc_mutex_t *new;
+    apr_status_t stat = APR_SUCCESS;
+  
+    if (mech != APR_LOCK_DEFAULT) {
+        return APR_ENOTIMPL;
+    }
+
+    new = (apr_proc_mutex_t *)apr_pcalloc(pool, sizeof(apr_proc_mutex_t));
+    if (new == NULL){
+        return APR_ENOMEM;
+    }
+    
+    if ((stat = create_sem(0, "APR_Lock")) < B_NO_ERROR) {
+        _proc_mutex_cleanup(new);
+        return stat;
+    }
+    new->LockCount = 0;
+    new->Lock = stat;  
+    new->pool  = pool;
+
+    apr_pool_cleanup_register(new->pool, (void *)new, _proc_mutex_cleanup,
+                              apr_pool_cleanup_null);
+
+    (*mutex) = new;
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_child_init(apr_proc_mutex_t **mutex,
+                                                    const char *fname,
+                                                    apr_pool_t *pool)
+{
+    return APR_SUCCESS;
+}
+    
+APR_DECLARE(apr_status_t) apr_proc_mutex_lock(apr_proc_mutex_t *mutex)
+{
+    int32 stat;
+    
+	if (atomic_add(&mutex->LockCount, 1) > 0) {
+		if ((stat = acquire_sem(mutex->Lock)) < B_NO_ERROR) {
+		    atomic_add(&mutex->LockCount, -1);
+		    return stat;
+		}
+	}
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_trylock(apr_proc_mutex_t *mutex)
+{
+    return APR_ENOTIMPL;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_unlock(apr_proc_mutex_t *mutex)
+{
+    int32 stat;
+    
+	if (atomic_add(&mutex->LockCount, -1) > 1) {
+        if ((stat = release_sem(mutex->Lock)) < B_NO_ERROR) {
+            atomic_add(&mutex->LockCount, 1);
+            return stat;
+        }
+    }
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_destroy(apr_proc_mutex_t *mutex)
+{
+    apr_status_t stat;
+    if ((stat = _proc_mutex_cleanup(mutex)) == APR_SUCCESS) {
+        apr_pool_cleanup_kill(mutex->pool, mutex, _proc_mutex_cleanup);
+        return APR_SUCCESS;
+    }
+    return stat;
+}
+
+APR_DECLARE(apr_status_t) apr_proc_mutex_cleanup(void *mutex)
+{
+    return _proc_mutex_cleanup(mutex);
+}
+
+
+APR_DECLARE(const char *) apr_proc_mutex_lockfile(apr_proc_mutex_t *mutex)
+{
+    return NULL;
+}
+
+APR_DECLARE(apr_lockmech_e) apr_proc_mutex_mech(apr_proc_mutex_t *mutex)
+{
+    return APR_LOCK_DEFAULT;
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_name(apr_proc_mutex_t *mutex)
+{
+    return "beossem";
+}
+
+APR_DECLARE(const char *) apr_proc_mutex_defname(void)
+{
+    return "beossem";
+}
+
+APR_PERMS_SET_ENOTIMPL(proc_mutex)
+
+APR_POOL_IMPLEMENT_ACCESSOR(proc_mutex)
+
+/* Implement OS-specific accessors defined in apr_portable.h */
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_get_ex(apr_os_proc_mutex_t *ospmutex, 
+                                                   apr_proc_mutex_t *pmutex,
+                                                   apr_lockmech_e *mech)
+{
+    ospmutex->sem = pmutex->Lock;
+    ospmutex->ben = pmutex->LockCount;
+    if (mech) {
+        *mech = APR_LOCK_DEFAULT;
+    }
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_get(apr_os_proc_mutex_t *ospmutex,
+                                                apr_proc_mutex_t *pmutex)
+{
+    return apr_os_proc_mutex_get_ex(ospmutex, pmutex, NULL);
+}
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_put_ex(apr_proc_mutex_t **pmutex,
+                                                apr_os_proc_mutex_t *ospmutex,
+                                                apr_lockmech_e mech,
+                                                int register_cleanup,
+                                                apr_pool_t *pool)
+{
+    if (pool == NULL) {
+        return APR_ENOPOOL;
+    }
+    if (mech != APR_LOCK_DEFAULT) {
+        return APR_ENOTIMPL;
+    }
+
+    if ((*pmutex) == NULL) {
+        (*pmutex) = (apr_proc_mutex_t *)apr_pcalloc(pool, sizeof(apr_proc_mutex_t));
+        (*pmutex)->pool = pool;
+    }
+    (*pmutex)->Lock = ospmutex->sem;
+    (*pmutex)->LockCount = ospmutex->ben;
+
+    if (register_cleanup) {
+        apr_pool_cleanup_register(pool, *pmutex, _proc_mutex_cleanup,
+                                  apr_pool_cleanup_null);
+    }
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_os_proc_mutex_put(apr_proc_mutex_t **pmutex,
+                                                apr_os_proc_mutex_t *ospmutex,
+                                                apr_pool_t *pool)
+{
+    return apr_os_proc_mutex_put_ex(pmutex, ospmutex, APR_LOCK_DEFAULT,
+                                    0, pool);
+}
+

third_party/apr/apr-1.6.5/locks/beos/thread_cond.c

@@ -0,0 +1,186 @@
+/* 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.
+ */
+
+#include "apr_arch_thread_mutex.h"
+#include "apr_arch_thread_cond.h"
+#include "apr_strings.h"
+#include "apr_portable.h"
+
+static apr_status_t thread_cond_cleanup(void *data)
+{
+    struct waiter *w;
+    apr_thread_cond_t *cond = (apr_thread_cond_t *)data;
+
+    acquire_sem(cond->lock);
+    delete_sem(cond->lock);
+
+    return APR_SUCCESS;
+}
+
+static struct waiter_t *make_waiter(apr_pool_t *pool)
+{
+    struct waiter_t *w = (struct waiter_t*)
+                       apr_palloc(pool, sizeof(struct waiter_t));
+    if (w == NULL)
+        return NULL;
+      
+    w->sem  = create_sem(0, "apr conditional waiter");
+    if (w->sem < 0)
+        return NULL;
+
+    APR_RING_ELEM_INIT(w, link);
+    
+    return w;
+}
+  
+APR_DECLARE(apr_status_t) apr_thread_cond_create(apr_thread_cond_t **cond,
+                                                 apr_pool_t *pool)
+{
+    apr_thread_cond_t *new_cond;
+    sem_id rv;
+    int i;
+
+    new_cond = (apr_thread_cond_t *)apr_palloc(pool, sizeof(apr_thread_cond_t));
+
+    if (new_cond == NULL)
+        return APR_ENOMEM;
+
+    if ((rv = create_sem(1, "apr conditional lock")) < B_OK)
+        return rv;
+    
+    new_cond->lock = rv;
+    new_cond->pool = pool;
+    APR_RING_INIT(&new_cond->alist, waiter_t, link);
+    APR_RING_INIT(&new_cond->flist, waiter_t, link);
+        
+    for (i=0;i < 10 ;i++) {
+        struct waiter_t *nw = make_waiter(pool);
+        APR_RING_INSERT_TAIL(&new_cond->flist, nw, waiter_t, link);
+    }
+
+    apr_pool_cleanup_register(new_cond->pool,
+                              (void *)new_cond, thread_cond_cleanup,
+                              apr_pool_cleanup_null);
+
+    *cond = new_cond;
+    return APR_SUCCESS;
+}
+
+
+static apr_status_t do_wait(apr_thread_cond_t *cond, apr_thread_mutex_t *mutex,
+                            int timeout)
+{
+    struct waiter_t *wait;
+    thread_id cth = find_thread(NULL);
+    apr_status_t rv;
+    int flags = B_RELATIVE_TIMEOUT;
+    
+    /* We must be the owner of the mutex or we can't do this... */    
+    if (mutex->owner != cth) {
+        /* What should we return??? */
+        return APR_EINVAL;
+    }
+
+    acquire_sem(cond->lock);
+    wait = APR_RING_FIRST(&cond->flist);
+    if (wait)
+        APR_RING_REMOVE(wait, link);
+    else
+        wait = make_waiter(cond->pool);   
+    APR_RING_INSERT_TAIL(&cond->alist, wait, waiter_t, link);
+    cond->condlock = mutex;
+    release_sem(cond->lock);
+       
+    apr_thread_mutex_unlock(cond->condlock);
+
+    if (timeout == 0)
+        flags = 0;
+        
+    rv = acquire_sem_etc(wait->sem, 1, flags, timeout);
+
+    apr_thread_mutex_lock(cond->condlock);
+    
+    if (rv != B_OK) {
+        if (rv == B_TIMED_OUT)
+            return APR_TIMEUP;
+        return rv;       
+    }
+
+    acquire_sem(cond->lock);
+    APR_RING_REMOVE(wait, link);
+    APR_RING_INSERT_TAIL(&cond->flist, wait, waiter_t, link);
+    release_sem(cond->lock);
+    
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_wait(apr_thread_cond_t *cond,
+                                               apr_thread_mutex_t *mutex)
+{
+    return do_wait(cond, mutex, 0);
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_timedwait(apr_thread_cond_t *cond,
+                                                    apr_thread_mutex_t *mutex,
+                                                    apr_interval_time_t timeout)
+{
+    return do_wait(cond, mutex, timeout);
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_signal(apr_thread_cond_t *cond)
+{
+    struct waiter_t *wake;
+
+    acquire_sem(cond->lock);    
+    if (!APR_RING_EMPTY(&cond->alist, waiter_t, link)) {
+        wake = APR_RING_FIRST(&cond->alist);
+        APR_RING_REMOVE(wake, link);
+        release_sem(wake->sem);
+        APR_RING_INSERT_TAIL(&cond->flist, wake, waiter_t, link);
+    }
+    release_sem(cond->lock);
+    
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_broadcast(apr_thread_cond_t *cond)
+{
+    struct waiter_t *wake;
+    
+    acquire_sem(cond->lock);
+    while (! APR_RING_EMPTY(&cond->alist, waiter_t, link)) {
+        wake = APR_RING_FIRST(&cond->alist);
+        APR_RING_REMOVE(wake, link);
+        release_sem(wake->sem);
+        APR_RING_INSERT_TAIL(&cond->flist, wake, waiter_t, link);
+    }
+    release_sem(cond->lock);
+    
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_destroy(apr_thread_cond_t *cond)
+{
+    apr_status_t stat;
+    if ((stat = thread_cond_cleanup(cond)) == APR_SUCCESS) {
+        apr_pool_cleanup_kill(cond->pool, cond, thread_cond_cleanup);
+        return APR_SUCCESS;
+    }
+    return stat;
+}
+
+APR_POOL_IMPLEMENT_ACCESSOR(thread_cond)
+

third_party/apr/apr-1.6.5/locks/beos/thread_mutex.c

@@ -0,0 +1,147 @@
+/* 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.
+ */
+
+/*Read/Write locking implementation based on the MultiLock code from
+ * Stephen Beaulieu <hippo@be.com>
+ */
+ 
+#include "apr_arch_thread_mutex.h"
+#include "apr_strings.h"
+#include "apr_portable.h"
+
+static apr_status_t _thread_mutex_cleanup(void * data)
+{
+    apr_thread_mutex_t *lock = (apr_thread_mutex_t*)data;
+    if (lock->LockCount != 0) {
+        /* we're still locked... */
+    	while (atomic_add(&lock->LockCount , -1) > 1){
+    	    /* OK we had more than one person waiting on the lock so 
+    	     * the sem is also locked. Release it until we have no more
+    	     * locks left.
+    	     */
+            release_sem (lock->Lock);
+    	}
+    }
+    delete_sem(lock->Lock);
+    return APR_SUCCESS;
+}    
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_create(apr_thread_mutex_t **mutex,
+                                                  unsigned int flags,
+                                                  apr_pool_t *pool)
+{
+    apr_thread_mutex_t *new_m;
+    apr_status_t stat = APR_SUCCESS;
+  
+    new_m = (apr_thread_mutex_t *)apr_pcalloc(pool, sizeof(apr_thread_mutex_t));
+    if (new_m == NULL){
+        return APR_ENOMEM;
+    }
+    
+    if ((stat = create_sem(0, "APR_Lock")) < B_NO_ERROR) {
+        _thread_mutex_cleanup(new_m);
+        return stat;
+    }
+    new_m->LockCount = 0;
+    new_m->Lock = stat;  
+    new_m->pool  = pool;
+
+    /* Optimal default is APR_THREAD_MUTEX_UNNESTED, 
+     * no additional checks required for either flag.
+     */
+    new_m->nested = flags & APR_THREAD_MUTEX_NESTED;
+
+    apr_pool_cleanup_register(new_m->pool, (void *)new_m, _thread_mutex_cleanup,
+                              apr_pool_cleanup_null);
+
+    (*mutex) = new_m;
+    return APR_SUCCESS;
+}
+
+#if APR_HAS_CREATE_LOCKS_NP
+APR_DECLARE(apr_status_t) apr_thread_mutex_create_np(apr_thread_mutex_t **mutex,
+                                                   const char *fname,
+                                                   apr_lockmech_e_np mech,
+                                                   apr_pool_t *pool)
+{
+    return APR_ENOTIMPL;
+}       
+#endif
+  
+APR_DECLARE(apr_status_t) apr_thread_mutex_lock(apr_thread_mutex_t *mutex)
+{
+    int32 stat;
+    thread_id me = find_thread(NULL);
+    
+    if (mutex->nested && mutex->owner == me) {
+        mutex->owner_ref++;
+        return APR_SUCCESS;
+    }
+    
+	if (atomic_add(&mutex->LockCount, 1) > 0) {
+		if ((stat = acquire_sem(mutex->Lock)) < B_NO_ERROR) {
+            /* Oh dear, acquire_sem failed!!  */
+		    atomic_add(&mutex->LockCount, -1);
+		    return stat;
+		}
+	}
+
+    mutex->owner = me;
+    mutex->owner_ref = 1;
+    
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex)
+{
+    return APR_ENOTIMPL;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
+{
+    int32 stat;
+        
+    if (mutex->nested && mutex->owner == find_thread(NULL)) {
+        mutex->owner_ref--;
+        if (mutex->owner_ref > 0)
+            return APR_SUCCESS;
+    }
+    
+	if (atomic_add(&mutex->LockCount, -1) > 1) {
+        if ((stat = release_sem(mutex->Lock)) < B_NO_ERROR) {
+            atomic_add(&mutex->LockCount, 1);
+            return stat;
+        }
+    }
+
+    mutex->owner = -1;
+    mutex->owner_ref = 0;
+
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex)
+{
+    apr_status_t stat;
+    if ((stat = _thread_mutex_cleanup(mutex)) == APR_SUCCESS) {
+        apr_pool_cleanup_kill(mutex->pool, mutex, _thread_mutex_cleanup);
+        return APR_SUCCESS;
+    }
+    return stat;
+}
+
+APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex)
+

third_party/apr/apr-1.6.5/locks/beos/thread_rwlock.c

@@ -0,0 +1,190 @@
+/* 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.
+ */
+
+/*Read/Write locking implementation based on the MultiLock code from
+ * Stephen Beaulieu <hippo@be.com>
+ */
+ 
+#include "apr_arch_thread_rwlock.h"
+#include "apr_strings.h"
+#include "apr_portable.h"
+
+#define BIG_NUM 100000
+
+static apr_status_t _thread_rw_cleanup(void * data)
+{
+    apr_thread_rwlock_t *mutex = (apr_thread_rwlock_t*)data;
+
+    if (mutex->ReadCount != 0) {
+    	while (atomic_add(&mutex->ReadCount , -1) > 1){
+            release_sem (mutex->Read);
+    	}
+    }
+    if (mutex->WriteCount != 0) {
+    	while (atomic_add(&mutex->WriteCount , -1) > 1){
+            release_sem (mutex->Write);
+    	}
+    }
+    if (mutex->LockCount != 0) {
+    	while (atomic_add(&mutex->LockCount , -1) > 1){
+            release_sem (mutex->Lock);
+    	}
+    }
+    
+    delete_sem(mutex->Read);
+    delete_sem(mutex->Write);
+    delete_sem(mutex->Lock);
+    return APR_SUCCESS;
+}    
+
+APR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock,
+                                                   apr_pool_t *pool)
+{
+    apr_thread_rwlock_t *new;
+  
+    new = (apr_thread_rwlock_t *)apr_pcalloc(pool, sizeof(apr_thread_rwlock_t));
+    if (new == NULL){
+        return APR_ENOMEM;
+    }
+    
+    new->pool  = pool;
+    /* we need to make 3 locks... */
+    new->ReadCount = 0;
+    new->WriteCount = 0;
+    new->LockCount = 0;
+    new->Read  = create_sem(0, "APR_ReadLock");
+    new->Write = create_sem(0, "APR_WriteLock");
+    new->Lock  = create_sem(0, "APR_Lock");
+    
+    if (new->Lock < 0 || new->Read < 0 || new->Write < 0) {
+        _thread_rw_cleanup(new);
+        return -1;
+    }
+
+    apr_pool_cleanup_register(new->pool, (void *)new, _thread_rw_cleanup,
+                              apr_pool_cleanup_null);
+    (*rwlock) = new;
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock)
+{
+    int32 rv = APR_SUCCESS;
+
+    if (find_thread(NULL) == rwlock->writer) {
+        /* we're the writer - no problem */
+        rwlock->Nested++;
+    } else {
+        /* we're not the writer */
+        int32 r = atomic_add(&rwlock->ReadCount, 1);
+        if (r < 0) {
+            /* Oh dear, writer holds lock, wait for sem */
+            rv = acquire_sem_etc(rwlock->Read, 1, B_DO_NOT_RESCHEDULE,
+                                 B_INFINITE_TIMEOUT);
+        }
+    }
+
+    return rv;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock)
+{
+    return APR_ENOTIMPL;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock)
+{
+    int rv = APR_SUCCESS;
+
+    if (find_thread(NULL) == rwlock->writer) {
+        rwlock->Nested++;
+    } else {
+        /* we're not the writer... */
+        if (atomic_add(&rwlock->LockCount, 1) >= 1) {
+            /* we're locked - acquire the sem */
+            rv = acquire_sem_etc(rwlock->Lock, 1, B_DO_NOT_RESCHEDULE,
+                                 B_INFINITE_TIMEOUT);
+        }
+        if (rv == APR_SUCCESS) {
+            /* decrement the ReadCount to a large -ve number so that
+             * we block on new readers...
+             */
+            int32 readers = atomic_add(&rwlock->ReadCount, -BIG_NUM);
+            if (readers > 0) {
+                /* readers are holding the lock */
+                rv = acquire_sem_etc(rwlock->Write, readers, B_DO_NOT_RESCHEDULE,
+                                     B_INFINITE_TIMEOUT);
+            }
+            if (rv == APR_SUCCESS)
+                rwlock->writer = find_thread(NULL);
+        }
+    }
+    
+    return rv;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock)
+{
+    return APR_ENOTIMPL;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock)
+{
+    apr_status_t rv = APR_SUCCESS;
+    int32 readers;
+
+    /* we know we hold the lock, so don't check it :) */
+    if (find_thread(NULL) == rwlock->writer) {
+    /* we know we hold the lock, so don't check it :) */
+        if (rwlock->Nested > 1) {
+            /* we're recursively locked */
+            rwlock->Nested--;
+            return APR_SUCCESS;
+        }
+        /* OK so we need to release the sem if we have it :) */
+        readers = atomic_add(&rwlock->ReadCount, BIG_NUM) + BIG_NUM;
+        if (readers > 0) {
+            rv = release_sem_etc(rwlock->Read, readers, B_DO_NOT_RESCHEDULE);
+        }
+        if (rv == APR_SUCCESS) {
+            rwlock->writer = -1;
+            if (atomic_add(&rwlock->LockCount, -1) > 1) {
+                rv = release_sem_etc(rwlock->Lock, 1, B_DO_NOT_RESCHEDULE);
+            }
+        }
+    } else {
+       /* We weren't the Writer, so just release the ReadCount... */
+       if (atomic_add(&rwlock->ReadCount, -1) < 0) {
+            /* we have a writer waiting for the lock, so release it */
+            rv = release_sem_etc(rwlock->Write, 1, B_DO_NOT_RESCHEDULE);
+        }
+    }
+
+    return rv;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock)
+{
+    apr_status_t stat;
+    if ((stat = _thread_rw_cleanup(rwlock)) == APR_SUCCESS) {
+        apr_pool_cleanup_kill(rwlock->pool, rwlock, _thread_rw_cleanup);
+        return APR_SUCCESS;
+    }
+    return stat;
+}
+
+APR_POOL_IMPLEMENT_ACCESSOR(thread_rwlock)
+