1 files changed, 165 insertions, 0 deletions
diff --git a/cpp/src/sys/Mutex.h b/cpp/src/sys/Mutex.h
new file mode 100644
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+++ b/cpp/src/sys/Mutex.h
@@ -0,0 +1,165 @@
+#ifndef _sys_Mutex_h
+#define _sys_Mutex_h
+
+/*
+ *
+ * Copyright (c) 2006 The Apache Software Foundation
+ *
+ * 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.
+ *
+ */
+
+#ifdef USE_APR
+#include <apr_thread_mutex.h>
+#include "apr/APRBase.h"
+#include "apr/APRPool.h"
+#else
+#include <pthread.h>
+#include "posix/check.h"
+#endif
+#include <boost/noncopyable.hpp>
+
+namespace qpid {
+namespace sys {
+
+class Condition;
+
+/**
+ * Scoped lock template: calls lock() in ctor, unlock() in dtor.
+ * L can be any class with lock() and unlock() functions.
+ */
+template <class L>
+class ScopedLock
+{
+  public:
+    ScopedLock(L& l) : mutex(l) { l.lock(); }
+    ~ScopedLock() { mutex.unlock(); }
+  private:
+    L& mutex;
+};
+
+template <class L>
+class ScopedUnlock
+{
+  public:
+    ScopedUnlock(L& l) : mutex(l) { l.unlock(); }
+    ~ScopedUnlock() { mutex.lock(); }
+  private:
+    L& mutex;
+};
+    
+/**
+ * Mutex lock.
+ */
+class Mutex : private boost::noncopyable {
+  public:
+    typedef ScopedLock<Mutex> ScopedLock;
+    typedef ScopedUnlock<Mutex> ScopedUnlock;
+    
+    inline Mutex();
+    inline ~Mutex();
+    inline void lock();
+    inline void unlock();
+    inline void trylock();
+
+  protected:
+#ifdef USE_APR
+    apr_thread_mutex_t* mutex;
+#else
+    pthread_mutex_t mutex;
+#endif
+  friend class Condition;
+};
+
+#ifdef USE_APR
+// APR ================================================================
+
+Mutex::Mutex() {
+    CHECK_APR_SUCCESS(apr_thread_mutex_create(&mutex, APR_THREAD_MUTEX_NESTED, APRPool::get()));
+}
+
+Mutex::~Mutex(){
+    CHECK_APR_SUCCESS(apr_thread_mutex_destroy(mutex));
+}
+
+void Mutex::lock() {
+    CHECK_APR_SUCCESS(apr_thread_mutex_lock(mutex));
+}
+void Mutex::unlock() {
+    CHECK_APR_SUCCESS(apr_thread_mutex_unlock(mutex));
+}
+
+void Mutex::trylock() {
+    CHECK_APR_SUCCESS(apr_thread_mutex_trylock(mutex));
+}
+
+#else
+// POSIX ================================================================
+
+/**
+ * PODMutex is a POD, can be static-initialized with
+ * PODMutex m = QPID_PODMUTEX_INITIALIZER
+ */
+struct PODMutex 
+{
+    typedef ScopedLock<PODMutex> ScopedLock;
+
+    inline void lock();
+    inline void unlock();
+    inline void trylock();
+
+    // Must be public to be a POD:
+    pthread_mutex_t mutex;
+};
+
+#define QPID_MUTEX_INITIALIZER { PTHREAD_MUTEX_INITIALIZER }
+
+
+void PODMutex::lock() {
+    QPID_POSIX_THROW_IF(pthread_mutex_lock(&mutex));
+}
+void PODMutex::unlock() {
+    QPID_POSIX_THROW_IF(pthread_mutex_unlock(&mutex));
+}
+
+void PODMutex::trylock() {
+    QPID_POSIX_THROW_IF(pthread_mutex_trylock(&mutex));
+}
+
+
+Mutex::Mutex() {
+    QPID_POSIX_THROW_IF(pthread_mutex_init(&mutex, 0));
+}
+
+Mutex::~Mutex(){
+    QPID_POSIX_THROW_IF(pthread_mutex_destroy(&mutex));
+}
+
+void Mutex::lock() {
+    QPID_POSIX_THROW_IF(pthread_mutex_lock(&mutex));
+}
+void Mutex::unlock() {
+    QPID_POSIX_THROW_IF(pthread_mutex_unlock(&mutex));
+}
+
+void Mutex::trylock() {
+    QPID_POSIX_THROW_IF(pthread_mutex_trylock(&mutex));
+}
+
+#endif // USE_APR
+
+}}
+
+
+
+#endif  /*!_sys_Mutex_h*/