PxSysInfoGetMCInfo()

Function to get memory class info.

APPLIES TO

8.2.0

SYNOPSIS
PxError_t PxSysInfoGetMCInfo (PxInfoMC_t *MCInfo, PxMc_t McId);
ARGUMENTS






MCInfo




Pointer to data area to store memory class information to


















McId




Id of memory class object

















RETURN VALUES






    

  • 

    PXROS error code
    

    • 







ERROR CODES















PXERR_MC_ILLMC




The given object is not a memory class object








PXERR_PROT_PERMISSION




The task has no write permission on the MCInfo object








PXERR_SERVICE_NOT_CONFIGURED




MONITOR_OBJECTS is not configured








PXERR_GLOBAL_ILLEGAL_CORE




The requested object pool is not on the same core









DESCRIPTION










PxSysInfoGetMCInfo stores the memory class type (fix/var), the free memory and the lowest capacity of the memory class McId into the info structure MCInfo. In fixsized memory classes PxInfoMC_FreeMem and PxInfoMC_MinCapacity represent the number of blocks, in varsized memory classes the number of bytes.














The structure MCInfo has the following format:
















typedef struct
{
	PxInfoMCType_t PxInfoMC_Type; // memory class type
	PxUChar_t *PxInfoMC_FirstBlock; // first memory block in memory class
	PxULong_t PxInfoMC_FreeMem; // free memory in memory class
	PxULong_t PxInfoMC_MinCapacity; // minimal capacity of memory class
	PxTask_t PxInfoMC_RequestingTask; // task, which requested the memory class
} PxInfoMC_t;
















The memory class McId may have one of the following types:
















typedef enum
{
	MCType_FixSized,
	MCType_VarSized
} PxInfoMCType_t;
















There is a union available containing all sysinfo types:
















typedef union
{
	PxInfoMC_t  McInfo; // memory class information struct
	PxInfoOpool_t  OpoolInfo; // Opool information struct
	PxInfoMsg_t  MsgInfo; // message information struct
	PxInfoMbx_t  MbxInfo; // mailbox information struct
	PxInfoDelay_t  DelayInfo; // delay object information struct
	PxInfoPe_t  PeInfo; // periodic event information struct
	PxInfoTo_t  ToInfo; // timeout object information struct
	PxInfoInterrupt_t  InterruptInfo; // interrupt object information struct
} PxObjInfo_T;
























IMPLEMENTATION GUIDELINES
















Before call






    

  • 

    MCInfo must be a pointer to a valid data area.
    

    • 

  • 

    McId must be:
    

    

      

    • 

      a valid PXROS-HR memory class object created with a PxMcRequest call (V).
      

      • 

    • 

      the symbolic value PXMcSystemdefault specifying the system memory class (V)
      

      • 

    • 

      the symbolic value PXMcTaskdefault specifying the task’s memory class (V)
      

      • 

    

    

    • 

  • 

    The validity of McId may also be checked by the PxMcIsValid macro (F).
    

    • 



















After call






    

  • 

    The function returns PXERR_NOERROR if the system information could be delivered. Any other return value describes an error, which has to be interpreted (C).
    

    • 



















Best Practice






    

  • 

    No restrictions
    

    • 






























SEE ALSO











USAGE








#include "pxdef.h"

PxError_t err = PxSysInfoGetMCInfo(&McInfo, mcId);

if (err == PXERR_NOERROR) {
    // Handle info
}
else {
    // Report error
}