drivers/staging/epl/SharedBuff.h

/****************************************************************************

  (c) SYSTEC electronic GmbH, D-07973 Greiz, August-Bebel-Str. 29
      www.systec-electronic.com

  Project:      Project independend shared buffer (linear + circular)

  Description:  Declaration of platform independend part for the
                shared buffer

  License:

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:

    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.

    2. 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.

    3. Neither the name of SYSTEC electronic GmbH nor the names of its
       contributors may be used to endorse or promote products derived
       from this software without prior written permission. For written
       permission, please contact info@systec-electronic.com.

    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 HOLDERS 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.

    Severability Clause:

        If a provision of this License is or becomes illegal, invalid or
        unenforceable in any jurisdiction, that shall not affect:
        1. the validity or enforceability in that jurisdiction of any other
           provision of this License; or
        2. the validity or enforceability in other jurisdictions of that or
           any other provision of this License.

  -------------------------------------------------------------------------

  2006/06/27 -rs:   V 1.00 (initial version)

****************************************************************************/

#ifndef _SHAREDBUFF_H_
#define _SHAREDBUFF_H_

//---------------------------------------------------------------------------
//  Type definitions
//---------------------------------------------------------------------------

typedef enum {
	kShbOk = 0,
	kShbNoReadableData = 1,
	kShbDataTruncated = 2,
	kShbBufferFull = 3,
	kShbDataOutsideBufferArea = 4,
	kShbBufferAlreadyCompleted = 5,
	kShbMemUsedByOtherProcs = 6,
	kShbOpenMismatch = 7,
	kShbInvalidBufferType = 8,
	kShbInvalidArg = 9,
	kShbBufferInvalid = 10,
	kShbOutOfMem = 11,
	kShbAlreadyReseting = 12,
	kShbAlreadySignaling = 13,
	kShbExceedDataSizeLimit = 14,

} tShbError;

// 2006/08/24 d.k.: Priority for threads (new data, job signaling)
typedef enum {
	kShbPriorityLow = 0,
	kShbPriorityNormal = 1,
	kshbPriorityHigh = 2
} tShbPriority;

typedef struct {
	unsigned int m_uiFullBlockSize;	// real size of allocated block (incl. alignment fill bytes)
	unsigned long m_ulAvailableSize;	// still available size for data
	unsigned long m_ulWrIndex;	// current write index
	unsigned int m_fBufferCompleted;	// TRUE if allocated block is complete filled with data

} tShbCirChunk;

typedef void *tShbInstance;

typedef void (*tShbCirSigHndlrNewData) (tShbInstance pShbInstance_p,
					unsigned long ulDataBlockSize_p);
typedef void (*tShbCirSigHndlrReset) (tShbInstance pShbInstance_p,
				      unsigned int fTimeOut_p);

//---------------------------------------------------------------------------
//  Prototypes
//---------------------------------------------------------------------------

#ifdef __cplusplus
extern "C" {
#endif

/*#if defined(INLINE_FUNCTION_DEF)
    #undef  INLINE_FUNCTION
    #define INLINE_FUNCTION     INLINE_FUNCTION_DEF
    #define INLINE_ENABLED      TRUE
    #define SHAREDBUFF_INLINED
    #include "SharedBuff.c"
#endif
*/

	tShbError ShbInit(void);
	tShbError ShbExit(void);

// Circular Shared Buffer
	tShbError ShbCirAllocBuffer(unsigned long ulBufferSize_p,
				    const char *pszBufferID_p,
				    tShbInstance * ppShbInstance_p,
				    unsigned int *pfShbNewCreated_p);
	tShbError ShbCirReleaseBuffer(tShbInstance pShbInstance_p);

#if !defined(INLINE_ENABLED)

	tShbError ShbCirResetBuffer(tShbInstance pShbInstance_p,
				    unsigned long ulTimeOut_p,
				    tShbCirSigHndlrReset
				    pfnSignalHandlerReset_p);
	tShbError ShbCirWriteDataBlock(tShbInstance pShbInstance_p,
				       const void *pSrcDataBlock_p,
				       unsigned long ulDataBlockSize_p);
	tShbError ShbCirAllocDataBlock(tShbInstance pShbInstance_p,
				       tShbCirChunk * pShbCirChunk_p,
				       unsigned long ulDataBufferSize_p);
	tShbError ShbCirWriteDataChunk(tShbInstance pShbInstance_p,
				       tShbCirChunk * pShbCirChunk_p,
				       const void *pSrcDataChunk_p,
				       unsigned long ulDataChunkSize_p,
				       unsigned int *pfBufferCompleted_p);
	tShbError ShbCirReadDataBlock(tShbInstance pShbInstance_p,
				      void *pDstDataBlock_p,
				      unsigned long ulRdBuffSize_p,
				      unsigned long *pulDataBlockSize_p);
	tShbError ShbCirGetReadDataSize(tShbInstance pShbInstance_p,
					unsigned long *pulDataBlockSize_p);
	tShbError ShbCirGetReadBlockCount(tShbInstance pShbInstance_p,
					  unsigned long *pulDataBlockCount_p);
	tShbError ShbCirSetSignalHandlerNewData(tShbInstance pShbInstance_p,
						tShbCirSigHndlrNewData
						pfnShbSignalHandlerNewData_p,
						tShbPriority ShbPriority_p);

#endif

// Linear Shared Buffer
	tShbError ShbLinAllocBuffer(unsigned long ulBufferSize_p,
				    const char *pszBufferID_p,
				    tShbInstance * ppShbInstance_p,
				    unsigned int *pfShbNewCreated_p);
	tShbError ShbLinReleaseBuffer(tShbInstance pShbInstance_p);

#if !defined(INLINE_ENABLED)

	tShbError ShbLinWriteDataBlock(tShbInstance pShbInstance_p,
				       unsigned long ulDstBufferOffs_p,
				       const void *pSrcDataBlock_p,
				       unsigned long ulDataBlockSize_p);
	tShbError ShbLinReadDataBlock(tShbInstance pShbInstance_p,
				      void *pDstDataBlock_p,
				      unsigned long ulSrcBufferOffs_p,
				      unsigned long ulDataBlockSize_p);

#endif

#ifndef NDEBUG
	tShbError ShbCirTraceBuffer(tShbInstance pShbInstance_p);
	tShbError ShbLinTraceBuffer(tShbInstance pShbInstance_p);
	tShbError ShbTraceDump(const unsigned char *pabStartAddr_p,
			       unsigned long ulDataSize_p,
			       unsigned long ulAddrOffset_p,
			       const char *pszInfoText_p);
#else
#define ShbCirTraceBuffer(p0)
#define ShbLinTraceBuffer(p0)
#define ShbTraceDump(p0, p1, p2, p3)
#endif

#undef  INLINE_ENABLED		// disable actual inlining of functions
#undef  INLINE_FUNCTION
#define INLINE_FUNCTION		// define INLINE_FUNCTION to nothing

#ifdef __cplusplus
}
#endif
#endif				// #ifndef _SHAREDBUFF_H_