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Fix #1514, Use XOR to swap between ping-pong buffers (style change only) #2351

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Fix #1514, Use XOR to swap between ping-pong buffers (style change only) #2351

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4 changes: 2 additions & 2 deletions modules/tbl/fsw/src/cfe_tbl_api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -867,12 +867,12 @@
{
/* Call the Application's Validation function for the Inactive Buffer */
Status =
(RegRecPtr->ValidationFuncPtr)(RegRecPtr->Buffers[(1U - RegRecPtr->ActiveBufferIndex)].BufferPtr);
(RegRecPtr->ValidationFuncPtr)(RegRecPtr->Buffers[(RegRecPtr->ActiveBufferIndex ^ 1)].BufferPtr);

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Code scanning / CodeQL-coding-standard

Use of non-constant function pointer Note

This call does not go through a const function pointer.

/* Allow buffer to be activated after passing validation */
if (Status == CFE_SUCCESS)
{
RegRecPtr->Buffers[(1U - RegRecPtr->ActiveBufferIndex)].Validated = true;
RegRecPtr->Buffers[(RegRecPtr->ActiveBufferIndex ^ 1)].Validated = true;
}
}
else
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2 changes: 1 addition & 1 deletion modules/tbl/fsw/src/cfe_tbl_internal.c
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Original file line number Diff line number Diff line change
Expand Up @@ -344,7 +344,7 @@ int32 CFE_TBL_GetWorkingBuffer(CFE_TBL_LoadBuff_t **WorkingBufferPtr, CFE_TBL_Re
{
if (RegRecPtr->DoubleBuffered)
{
*WorkingBufferPtr = &RegRecPtr->Buffers[(1U - RegRecPtr->ActiveBufferIndex)];
*WorkingBufferPtr = &RegRecPtr->Buffers[(RegRecPtr->ActiveBufferIndex ^ 1)];
}
else
{
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8 changes: 4 additions & 4 deletions modules/tbl/fsw/src/cfe_tbl_task_cmds.c
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Original file line number Diff line number Diff line change
Expand Up @@ -264,7 +264,7 @@ void CFE_TBL_GetTblRegData(void)
{
/* For a double buffered table, the inactive is the other allocated buffer */
CFE_TBL_Global.TblRegPacket.Payload.InactiveBufferAddr =
CFE_ES_MEMADDRESS_C(RegRecPtr->Buffers[(1U - RegRecPtr->ActiveBufferIndex)].BufferPtr);
CFE_ES_MEMADDRESS_C(RegRecPtr->Buffers[(RegRecPtr->ActiveBufferIndex ^ 1)].BufferPtr);
}
else
{
Expand Down Expand Up @@ -565,7 +565,7 @@ int32 CFE_TBL_DumpCmd(const CFE_TBL_DumpCmd_t *data)
/* If this is a double buffered table, locating the inactive buffer is trivial */
if (RegRecPtr->DoubleBuffered)
{
DumpDataAddr = RegRecPtr->Buffers[(1U - RegRecPtr->ActiveBufferIndex)].BufferPtr;
DumpDataAddr = RegRecPtr->Buffers[(RegRecPtr->ActiveBufferIndex ^ 1)].BufferPtr;
}
else
{
Expand Down Expand Up @@ -827,7 +827,7 @@ int32 CFE_TBL_ValidateCmd(const CFE_TBL_ValidateCmd_t *data)
/* If this is a double buffered table, locating the inactive buffer is trivial */
if (RegRecPtr->DoubleBuffered)
{
ValidationDataPtr = RegRecPtr->Buffers[(1U - RegRecPtr->ActiveBufferIndex)].BufferPtr;
ValidationDataPtr = RegRecPtr->Buffers[(RegRecPtr->ActiveBufferIndex ^ 1)].BufferPtr;
}
else
{
Expand Down Expand Up @@ -966,7 +966,7 @@ int32 CFE_TBL_ActivateCmd(const CFE_TBL_ActivateCmd_t *data)
/* Determine if the inactive buffer has been successfully validated or not */
if (RegRecPtr->DoubleBuffered)
{
ValidationStatus = RegRecPtr->Buffers[(1U - RegRecPtr->ActiveBufferIndex)].Validated;
ValidationStatus = RegRecPtr->Buffers[(RegRecPtr->ActiveBufferIndex ^ 1)].Validated;
}
else
{
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4 changes: 2 additions & 2 deletions modules/tbl/ut-coverage/tbl_UT.c
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Original file line number Diff line number Diff line change
Expand Up @@ -726,7 +726,7 @@
UT_InitData();
ValidateCmd.Payload.ActiveTableFlag = CFE_TBL_BufferSelect_INACTIVE;
CFE_TBL_Global.Registry[0].DoubleBuffered = true;
CFE_TBL_Global.Registry[0].Buffers[1 - CFE_TBL_Global.Registry[0].ActiveBufferIndex].BufferPtr = BuffPtr;
CFE_TBL_Global.Registry[0].Buffers[CFE_TBL_Global.Registry[0].ActiveBufferIndex ^ 1].BufferPtr = BuffPtr;

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CFE_TBL_Global.ValidationResults[0].State = CFE_TBL_VALIDATION_FREE;
CFE_TBL_Global.Registry[0].ValidationFuncPtr = ValFuncPtr;
UtAssert_INT32_EQ(CFE_TBL_ValidateCmd(&ValidateCmd), CFE_TBL_INC_CMD_CTR);
Expand Down Expand Up @@ -1111,7 +1111,7 @@
UT_InitData();
DumpCmd.Payload.ActiveTableFlag = CFE_TBL_BufferSelect_INACTIVE;
CFE_TBL_Global.Registry[2].DoubleBuffered = true;
CFE_TBL_Global.Registry[2].Buffers[(1 - CFE_TBL_Global.Registry[2].ActiveBufferIndex)].BufferPtr = BuffPtr;
CFE_TBL_Global.Registry[2].Buffers[(CFE_TBL_Global.Registry[2].ActiveBufferIndex ^ 1)].BufferPtr = BuffPtr;

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A stack address (
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) may be assigned to a non-local variable.
CFE_TBL_Global.Registry[2].DumpControlIndex = CFE_TBL_NO_DUMP_PENDING + 1;
UtAssert_INT32_EQ(CFE_TBL_DumpCmd(&DumpCmd), CFE_TBL_INC_ERR_CTR);

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