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[bottlenecks.git] / rubbos / app / httpd-2.0.64 / srclib / apr / locks / win32 / thread_cond.c

diff --git a/rubbos/app/httpd-2.0.64/srclib/apr/locks/win32/thread_cond.c b/rubbos/app/httpd-2.0.64/srclib/apr/locks/win32/thread_cond.c
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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.
+ */
+
+#include "apr.h"
+#include "apr_private.h"
+#include "apr_general.h"
+#include "apr_strings.h"
+#include "win32/apr_arch_thread_mutex.h"
+#include "win32/apr_arch_thread_cond.h"
+#include "apr_portable.h"
+
+static apr_status_t thread_cond_cleanup(void *data)
+{
+    apr_thread_cond_t *cond = data;
+    CloseHandle(cond->event);
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_create(apr_thread_cond_t **cond,
+                                                 apr_pool_t *pool)
+{
+    *cond = apr_palloc(pool, sizeof(**cond));
+    (*cond)->pool = pool;
+    (*cond)->event = CreateEvent(NULL, TRUE, FALSE, NULL);
+    (*cond)->signal_all = 0;
+    (*cond)->num_waiting = 0;
+    return APR_SUCCESS;
+}
+
+static APR_INLINE apr_status_t _thread_cond_timedwait(apr_thread_cond_t *cond,
+                                                      apr_thread_mutex_t *mutex,
+                                                      DWORD timeout_ms )
+{
+    DWORD res;
+
+    while (1) {
+        cond->num_waiting++;
+
+        apr_thread_mutex_unlock(mutex);
+        res = WaitForSingleObject(cond->event, timeout_ms);
+        apr_thread_mutex_lock(mutex);
+        cond->num_waiting--;
+        if (res != WAIT_OBJECT_0) {
+            apr_status_t rv = apr_get_os_error();
+            if (res == WAIT_TIMEOUT) {
+                return APR_TIMEUP;
+            }
+            return apr_get_os_error();
+        }
+        if (cond->signal_all) {
+            if (cond->num_waiting == 0) {
+                cond->signal_all = 0;
+                cond->signalled = 0;
+                ResetEvent(cond->event);
+            }
+            break;
+        }
+        else if (cond->signalled) {
+            cond->signalled = 0;
+            ResetEvent(cond->event);
+            break;
+        }
+    }
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_wait(apr_thread_cond_t *cond,
+                                               apr_thread_mutex_t *mutex)
+{
+    return _thread_cond_timedwait(cond, mutex, INFINITE);
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_timedwait(apr_thread_cond_t *cond,
+                                                    apr_thread_mutex_t *mutex,
+                                                    apr_interval_time_t timeout)
+{
+    DWORD timeout_ms = (DWORD) apr_time_as_msec(timeout);
+
+    return _thread_cond_timedwait(cond, mutex, timeout_ms);
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_signal(apr_thread_cond_t *cond)
+{
+    apr_status_t rv = APR_SUCCESS;
+    DWORD res;
+
+    cond->signalled = 1;
+    res = SetEvent(cond->event);
+    if (res == 0) {
+        rv = apr_get_os_error();
+    }
+    return rv;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_broadcast(apr_thread_cond_t *cond)
+{
+    apr_status_t rv = APR_SUCCESS;
+    DWORD res;
+
+    cond->signalled = 1;
+    cond->signal_all = 1;
+    res = SetEvent(cond->event);
+    if (res == 0) {
+        rv = apr_get_os_error();
+    }
+    return rv;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_cond_destroy(apr_thread_cond_t *cond)
+{
+    return apr_pool_cleanup_run(cond->pool, cond, thread_cond_cleanup);
+}
+
+APR_POOL_IMPLEMENT_ACCESSOR(thread_cond)
+