ACKSession allocACK(ushort session_id, int size)
{
MMU_Tab mmu = null;
if (session_id > 0 && session_id < 32)
{
if (ACKSessionTab[session_id - 1].mmu != null)
{
freeACK(ACKSessionTab[session_id - 1]);
}
mmu = allocMemory(size);
if (mmu == null)
{
API_LOG(serialDevice, ERROR_LOG, "there is not enough memory");
return(null);
}
else
{
ACKSessionTab[session_id - 1].mmu = mmu;
return(ACKSessionTab[session_id - 1]);
}
}
API_LOG(serialDevice, ERROR_LOG, "wrong Ack session ID: 0x{0:X}", session_id);
return(null);
}
void freeMemory(MMU_Tab mmu_tab)
{
if (mmu_tab == null)
{
return;
}
if (mmu_tab.tabIndex == 0 || mmu_tab.tabIndex == (MMU_TABLE_NUM - 1))
{
return;
}
mmu_tab.usageFlag = false;
}
/*! @note Alloc a cmd session for sending cmd data
* when arg session_id = 0/1, it means select session 0/1 to send cmd
* otherwise set arg session_id = CMD_SESSION_AUTO (32), which means auto
* select a idle session id is between 2~31.
*/
CMDSession allocSession(ushort session_id,
int size)
{
uint i;
API_LOG(serialDevice, DEBUG_LOG, "Allocation size {0}", size);
MMU_Tab mmu = null;
if (session_id == 0 || session_id == 1)
{
if (CMDSessionTab[session_id].usageFlag == false)
{
i = session_id;
}
else
{
/* session is busy */
API_LOG(serialDevice, ERROR_LOG, "session {0} is busy", session_id);
return(null);
}
}
else
{
for (i = 2; i < SESSION_TABLE_NUM; i++)
{
if (CMDSessionTab[i].usageFlag == false)
{
break;
}
}
}
if (i < 32 && CMDSessionTab[i].usageFlag == false)
{
CMDSessionTab[i].usageFlag = true;
mmu = allocMemory(size);
if (mmu == null)
{
CMDSessionTab[i].usageFlag = false;
}
else
{
CMDSessionTab[i].mmu = mmu;
return(CMDSessionTab[i]);
}
}
return(null);
}
void setupMMU()
{
for (int i = 0; i < MMU.Length; i++)
{
MMU[i] = new MMU_Tab();
}
MMU[0].tabIndex = 0;
MMU[0].usageFlag = true;
MMU[0].pmem = (Ptr)memory;
MMU[0].memSize = 0;
for (var i = 1; i < (MMU_TABLE_NUM - 1); i++)
{
MMU[i].tabIndex = i;
MMU[i].usageFlag = false;
}
MMU[MMU_TABLE_NUM - 1].tabIndex = MMU_TABLE_NUM - 1;
MMU[MMU_TABLE_NUM - 1].usageFlag = true;
MMU[MMU_TABLE_NUM - 1].pmem = (Ptr)memory + MEMORY_SIZE;
MMU[MMU_TABLE_NUM - 1].memSize = 0;
}
