1 files changed, 136 insertions, 0 deletions
diff --git a/nci/jni/Mutex.cpp b/nci/jni/Mutex.cpp
new file mode 100644
index 0000000..c0b12c0
--- /dev/null
+++ b/nci/jni/Mutex.cpp
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * 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.
+ */
+
+/*
+ *  Encapsulate a mutex for thread synchronization.
+ */
+
+#include "Mutex.h"
+#include "NfcJniUtil.h"
+#include <errno.h>
+
+/*******************************************************************************
+**
+** Function:        Mutex
+**
+** Description:     Initialize member variables.
+**
+** Returns:         None.
+**
+*******************************************************************************/
+Mutex::Mutex ()
+{
+    memset (&mMutex, 0, sizeof(mMutex));
+    int res = pthread_mutex_init (&mMutex, NULL);
+    if (res != 0)
+    {
+        ALOGE ("Mutex::Mutex: fail init; error=0x%X", res);
+    }
+}
+
+
+/*******************************************************************************
+**
+** Function:        ~Mutex
+**
+** Description:     Cleanup all resources.
+**
+** Returns:         None.
+**
+*******************************************************************************/
+Mutex::~Mutex ()
+{
+    int res = pthread_mutex_destroy (&mMutex);
+    if (res != 0)
+    {
+        ALOGE ("Mutex::~Mutex: fail destroy; error=0x%X", res);
+    }
+}
+
+
+/*******************************************************************************
+**
+** Function:        lock
+**
+** Description:     Block the thread and try lock the mutex.
+**
+** Returns:         None.
+**
+*******************************************************************************/
+void Mutex::lock ()
+{
+    int res = pthread_mutex_lock (&mMutex);
+    if (res != 0)
+    {
+        ALOGE ("Mutex::lock: fail lock; error=0x%X", res);
+    }
+}
+
+
+/*******************************************************************************
+**
+** Function:        unlock
+**
+** Description:     Unlock a mutex to unblock a thread.
+**
+** Returns:         None.
+**
+*******************************************************************************/
+void Mutex::unlock ()
+{
+    int res = pthread_mutex_unlock (&mMutex);
+    if (res != 0)
+    {
+        ALOGE ("Mutex::unlock: fail unlock; error=0x%X", res);
+    }
+}
+
+
+/*******************************************************************************
+**
+** Function:        tryLock
+**
+** Description:     Try to lock the mutex.
+**
+** Returns:         True if the mutex is locked.
+**
+*******************************************************************************/
+bool Mutex::tryLock ()
+{
+    int res = pthread_mutex_trylock (&mMutex);
+    if ((res != 0) && (res != EBUSY))
+    {
+        ALOGE ("Mutex::tryLock: error=0x%X", res);
+    }
+    return res == 0;
+}
+
+
+/*******************************************************************************
+**
+** Function:        nativeHandle
+**
+** Description:     Get the handle of the mutex.
+**
+** Returns:         Handle of the mutex.
+**
+*******************************************************************************/
+pthread_mutex_t* Mutex::nativeHandle ()
+{
+    return &mMutex;
+}
+
+