1 files changed, 114 insertions, 0 deletions
diff --git a/src/core/dsp/mailbox.h b/src/core/dsp/mailbox.h
new file mode 100644
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+++ b/src/core/dsp/mailbox.h
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+/******************************************************************************
+ * Copyright (c) 2013-2014, Texas Instruments Incorporated - http://www.ti.com/
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions are met:
+ *       * Redistributions of source code must retain the above copyright
+ *         notice, this list of conditions and the following disclaimer.
+ *       * Redistributions in binary form must reproduce the above copyright
+ *         notice, this list of conditions and the following disclaimer in the
+ *         documentation and/or other materials provided with the distribution.
+ *       * Neither the name of Texas Instruments Incorporated nor the
+ *         names of its contributors may be used to endorse or promote products
+ *         derived from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ *   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ *   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ *   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ *   THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+#ifndef _MAILBOX_H_
+#define _MAILBOX_H_
+#include "u_locks_pthread.h"
+#include "driver.h"
+
+extern "C"
+{
+    #include "mpm_mailbox.h"
+}
+
+class Mailbox
+{
+  public:
+
+    int32_t create(void* mbox_handle, char *slave_node_name, 
+                   uint32_t mem_location, uint32_t direction, 
+                   mpm_mailbox_config_t *mbox_config)
+    { 
+       int32_t result = mpm_mailbox_create(mbox_handle, slave_node_name,
+                                        mem_location, direction, mbox_config);
+        return result;
+    }
+
+    int32_t open(void* mbox_handle)
+    { 
+        int32_t result = mpm_mailbox_open(mbox_handle); 
+        return result;
+    }
+
+    int32_t write (void* mbox_handle, uint8_t *buf, uint32_t size, 
+                   uint32_t trans_id)
+    { 
+        int result;
+
+        do result = mpm_mailbox_write (mbox_handle, buf, size, trans_id); 
+        while (result == MPM_MAILBOX_ERR_MAIL_BOX_FULL);
+
+        return true;
+    }
+
+    int32_t read (void* mbox_handle, uint8_t *buf, uint32_t *size, 
+                  uint32_t *trans_id)
+    { 
+        int32_t result = mpm_mailbox_read (mbox_handle, buf, size, trans_id); 
+        return result;
+    }
+
+    int32_t query (void* mbox_handle)
+    { 
+        int32_t result = mpm_mailbox_query (mbox_handle); 
+        return result;
+    }
+
+    /*-------------------------------------------------------------------------
+    * Thread safe instance function for singleton behavior
+    *------------------------------------------------------------------------*/
+    static Mailbox* instance () 
+    {
+        static Mutex Mailbox_instance_mutex;
+        Mailbox* tmp = pInstance;
+
+        __sync_synchronize();
+
+        if (tmp == 0) 
+        {
+            ScopedLock lck(Mailbox_instance_mutex);
+
+            tmp = pInstance;
+            if (tmp == 0) 
+            {
+                tmp = new Mailbox;
+                __sync_synchronize();
+                pInstance = tmp;
+            }
+        }
+        return tmp;
+    }
+
+  private:
+    static Mailbox* pInstance;
+
+    Mailbox() { }                         // ctor private
+    Mailbox(const Mailbox&);              // copy ctor disallowed
+    Mailbox& operator=(const Mailbox&);   // assignment disallowed
+};
+
+#endif // _MAILBOX_H_