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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_
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