1 files changed, 128 insertions, 0 deletions
diff --git a/cpp/src/sys/Condition.h b/cpp/src/sys/Condition.h
new file mode 100644
index 0000000000..455b179683
--- /dev/null
+++ b/cpp/src/sys/Condition.h
@@ -0,0 +1,128 @@
+#ifndef _sys_Condition_h
+#define _sys_Condition_h
+
+/*
+ *
+ * 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 <sys/errno.h>
+#include <boost/noncopyable.hpp>
+#include "Mutex.h"
+#include "Time.h"
+
+#ifdef USE_APR
+#include <apr_thread_cond.h>
+#endif
+
+namespace qpid {
+namespace sys {
+
+/**
+ * A condition variable for thread synchronization.
+ */
+class Condition
+{
+  public:
+    inline Condition();
+    inline ~Condition();
+    inline void wait(Mutex&);
+    inline bool wait(Mutex&, const Time& absoluteTime);
+    inline void notify();
+    inline void notifyAll();
+
+  private:
+#ifdef USE_APR
+    apr_thread_cond_t* condition;
+#else
+    pthread_cond_t condition;
+#endif
+};
+
+
+// APR ================================================================
+#ifdef USE_APR
+
+Condition::Condition() {
+    CHECK_APR_SUCCESS(apr_thread_cond_create(&condition, APRPool::get()));
+}
+
+Condition::~Condition() {
+    CHECK_APR_SUCCESS(apr_thread_cond_destroy(condition));
+}
+
+void Condition::wait(Mutex& mutex) {
+    CHECK_APR_SUCCESS(apr_thread_cond_wait(condition, mutex.mutex));
+}
+
+bool Condition::wait(Mutex& mutex, const Time& absoluteTime){
+    // APR uses microseconds.
+    apr_status_t status =
+        apr_thread_cond_timedwait(
+            condition, mutex.mutex, absoluteTime/TIME_USEC);
+    if(status != APR_TIMEUP) CHECK_APR_SUCCESS(status);
+    return status == 0;
+}
+
+void Condition::notify(){
+    CHECK_APR_SUCCESS(apr_thread_cond_signal(condition));
+}
+
+void Condition::notifyAll(){
+    CHECK_APR_SUCCESS(apr_thread_cond_broadcast(condition));
+}
+
+#else
+// POSIX ================================================================
+
+Condition::Condition() {
+    QPID_POSIX_THROW_IF(pthread_cond_init(&condition, 0));
+}
+
+Condition::~Condition() {
+    QPID_POSIX_THROW_IF(pthread_cond_destroy(&condition));
+}
+
+void Condition::wait(Mutex& mutex) {
+    QPID_POSIX_THROW_IF(pthread_cond_wait(&condition, &mutex.mutex));
+}
+
+bool Condition::wait(Mutex& mutex, const Time& absoluteTime){
+    struct timespec ts;
+    toTimespec(ts, absoluteTime);
+    int status = pthread_cond_timedwait(&condition, &mutex.mutex, &ts);
+    if (status != 0) {
+        if (status == ETIMEDOUT) return false;
+        throw QPID_POSIX_ERROR(status);
+    }
+    return true;
+}
+
+void Condition::notify(){
+    QPID_POSIX_THROW_IF(pthread_cond_signal(&condition));
+}
+
+void Condition::notifyAll(){
+    QPID_POSIX_THROW_IF(pthread_cond_broadcast(&condition));
+}
+#endif  /*USE_APR*/
+
+
+}}
+#endif  /*!_sys_Condition_h*/