From a48c9eddce4cbc56521fca7fd64582d9dafe1d40 Mon Sep 17 00:00:00 2001
From: "Carl C. Trieloff" <cctrieloff@apache.org>
Date: Thu, 5 Jul 2007 16:19:05 +0000
Subject: - Added RW lock - Updated all exchanges to us RW lock - Updated all
 registries to us RW lock - Still need to do (client, channel, message and
 queues)

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@553549 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/src/qpid/sys/Mutex.h       | 20 ++++++++++
 cpp/src/qpid/sys/posix/Mutex.h | 84 +++++++++++++++++++++++++++++++++++++++---
 2 files changed, 99 insertions(+), 5 deletions(-)

(limited to 'cpp/src/qpid/sys')

diff --git a/cpp/src/qpid/sys/Mutex.h b/cpp/src/qpid/sys/Mutex.h
index 4eff6078ae..b8545d4449 100644
--- a/cpp/src/qpid/sys/Mutex.h
+++ b/cpp/src/qpid/sys/Mutex.h
@@ -46,6 +46,26 @@ class ScopedUnlock
     L& mutex;
 };
 
+template <class L>
+class ScopedRlock
+{
+  public:
+    ScopedRlock(L& l) : mutex(l) { l.rlock(); }
+    ~ScopedRlock() { mutex.unlock(); }
+  private:
+    L& mutex;
+};
+
+template <class L>
+class ScopedWlock
+{
+  public:
+    ScopedWlock(L& l) : mutex(l) { l.wlock(); }
+    ~ScopedWlock() { mutex.unlock(); }
+  private:
+    L& mutex;
+};
+
 }}
     
 #ifdef USE_APR_PLATFORM
diff --git a/cpp/src/qpid/sys/posix/Mutex.h b/cpp/src/qpid/sys/posix/Mutex.h
index b278c6b14a..b29219235d 100644
--- a/cpp/src/qpid/sys/posix/Mutex.h
+++ b/cpp/src/qpid/sys/posix/Mutex.h
@@ -38,29 +38,58 @@ class Mutex : private boost::noncopyable {
 public:
     typedef ScopedLock<Mutex> ScopedLock;
     typedef ScopedUnlock<Mutex> ScopedUnlock;
-    
+     
     inline Mutex();
     inline ~Mutex();
-    inline void lock();
+    inline void lock();  
     inline void unlock();
-    inline void trylock();
+    inline void trylock();  
+
 
 protected:
     pthread_mutex_t mutex;
 };
 
+/**
+ * RW lock.
+ */
+class RWlock : private boost::noncopyable {
+    friend class Condition;
+
+public:
+    typedef ScopedRlock<RWlock> ScopedRlock;
+    typedef ScopedWlock<RWlock> ScopedWlock;
+    
+    inline RWlock();
+    inline ~RWlock();
+    inline void wlock();  // will write-lock
+    inline void rlock();  // will read-lock
+    inline void unlock();
+    inline void trywlock();  // will write-try
+    inline void tryrlock();  // will read-try
+
+protected:
+    pthread_rwlock_t rwlock;
+};
+
+
 /**
  * Initialise a recursive mutex attr for use in creating mutexes later
  * (we use pthread_once to make sure it is initialised exactly once)
  */
 namespace {
 	pthread_once_t  onceControl = PTHREAD_ONCE_INIT;
+	pthread_rwlockattr_t rwlockattr;
 	pthread_mutexattr_t mutexattr;
 	
 	void initMutexattr()  {
 		pthread_mutexattr_init(&mutexattr);
 		pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_RECURSIVE);
 	}
+
+	void initRWlockattr()  {
+		pthread_rwlockattr_init(&rwlockattr);
+	}
 	
 	struct RecursiveMutexattr {
 		RecursiveMutexattr() {
@@ -71,8 +100,21 @@ namespace {
 			return &mutexattr;
 		}
 	};
+	struct RecursiveRWlockattr {
+		RecursiveRWlockattr() {
+			pthread_once(&onceControl, initRWlockattr);
+		}
+		
+		operator const pthread_rwlockattr_t*() const {
+			return &rwlockattr;
+		}
+	};
 	
 	RecursiveMutexattr recursiveMutexattr;
+	RecursiveRWlockattr recursiveRWlockattr;
+	
+	
+	
 }
 
 /**
@@ -83,9 +125,9 @@ struct PODMutex
 {
     typedef ScopedLock<PODMutex> ScopedLock;
 
-    inline void lock();
+    inline void lock();  
     inline void unlock();
-    inline void trylock();
+    inline void trylock();  
 
     // Must be public to be a POD:
     pthread_mutex_t mutex;
@@ -96,6 +138,7 @@ struct PODMutex
 void PODMutex::lock() {
     QPID_POSIX_THROW_IF(pthread_mutex_lock(&mutex));
 }
+
 void PODMutex::unlock() {
     QPID_POSIX_THROW_IF(pthread_mutex_unlock(&mutex));
 }
@@ -115,6 +158,7 @@ Mutex::~Mutex(){
 void Mutex::lock() {
     QPID_POSIX_THROW_IF(pthread_mutex_lock(&mutex));
 }
+
 void Mutex::unlock() {
     QPID_POSIX_THROW_IF(pthread_mutex_unlock(&mutex));
 }
@@ -123,5 +167,35 @@ void Mutex::trylock() {
     QPID_POSIX_THROW_IF(pthread_mutex_trylock(&mutex));
 }
 
+
+RWlock::RWlock() {
+    QPID_POSIX_THROW_IF(pthread_rwlock_init(&rwlock, recursiveRWlockattr));
+}
+
+RWlock::~RWlock(){
+    QPID_POSIX_THROW_IF(pthread_rwlock_destroy(&rwlock));
+}
+
+void RWlock::wlock() {
+    QPID_POSIX_THROW_IF(pthread_rwlock_wrlock(&rwlock));
+}
+
+void RWlock::rlock() {
+    QPID_POSIX_THROW_IF(pthread_rwlock_rdlock(&rwlock));
+}
+
+void RWlock::unlock() {
+    QPID_POSIX_THROW_IF(pthread_rwlock_unlock(&rwlock));
+}
+
+void RWlock::trywlock() {
+    QPID_POSIX_THROW_IF(pthread_rwlock_trywrlock(&rwlock));
+}
+
+void RWlock::tryrlock() {
+    QPID_POSIX_THROW_IF(pthread_rwlock_tryrdlock(&rwlock));
+}
+
+
 }}
 #endif  /*!_sys_posix_Mutex_h*/
-- 
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