@note The class is used in Offline (AliRoot) context
*/
-#include <cerrno>
+// see below for class documentation
+// or
+// refer to README to build package
+// or
+// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
+
+#include <vector>
+#include "TObject.h"
#include "AliHLTLogging.h"
#include "AliHLTDataTypes.h"
-#include "AliHLTDefinitions.h"
-#include "TObject.h"
-#include "TList.h"
-
-class AliHLTComponent;
-/* @name internal data structures
- */
-
-/**
- * @struct AliHLTDataSegment
- * @brief Descriptor of a data segment within the buffer.
- * @ingroup alihlt_system
- */
-struct AliHLTDataSegment {
- AliHLTDataSegment()
- {
- //fDataType=0;
- fSegmentOffset=0;
- fSegmentSize=0;
- fSpecification=0;
- }
- AliHLTDataSegment(AliHLTUInt32_t offset, AliHLTUInt32_t size)
- {
- //fDataType=0;
- fSegmentOffset=offset;
- fSegmentSize=size;
- fSpecification=0;
- }
- /** the data type of this segment */
- AliHLTComponent_DataType fDataType;
- /** offset in byte within the data buffer */
- AliHLTUInt32_t fSegmentOffset;
- /** size of the actual content */
- AliHLTUInt32_t fSegmentSize;
- /** data specification */
- AliHLTUInt32_t fSpecification;
-};
-
-/**
- * @struct AliHLTRawBuffer
- * @brief Descriptor of the raw data buffer which can host several segments.
- * @ingroup alihlt_system
- */
-struct AliHLTRawBuffer {
- /** size of the currently occupied partition of the buffer */
- AliHLTUInt32_t fSize;
- /** total size of the buffer, including safety margin */
- AliHLTUInt32_t fTotalSize;
- /** the buffer */
- void* fPtr;
-};
-
-/**
- * @class AliHLTConsumerDescriptor
- * @brief Helper class to describe a consumer component.
- *
- * There is unfortunately no unique determination of the data type from the component
- * itself possible, thats why both component and data type have to be initialized
- * and are stored in a compound. The class is intended to make bookkeeping easier.
- *
- * @note This class is only used for the @ref alihlt_system.
- *
- * @ingroup alihlt_system
- */
-class AliHLTConsumerDescriptor : public AliHLTLogging, public TObject {
- private:
- AliHLTComponent* fpConsumer;
- vector<AliHLTDataSegment> fSegments;
-
- public:
- /** standard constructur */
- AliHLTConsumerDescriptor();
- /** constructur
- * @param pConsumer pointer to the consumer component
- */
- AliHLTConsumerDescriptor(AliHLTComponent* pConsumer);
- ~AliHLTConsumerDescriptor();
-
- /**
- * Get the component of this descriptor
- * @return pointer to the component
- */
- AliHLTComponent* GetComponent() {return fpConsumer;}
-
- /**
- * Set an active data segment
- * the pointer will be handled in a container, not allocation, copy or cleanup
- * @param offset offset of the segment in the buffer
- * @param size size of the segment in the buffer
- * @return >=0 if succeeded
- */
- int SetActiveDataSegment(AliHLTUInt32_t offset, AliHLTUInt32_t size);
-
- /**
- * check whether there is an active data segment of certain size with certain offset
- * @param offset offset of the data segment in the data buffer
- * @param size size of the data segment in the data buffer
- * @return > if existend, 0 if not
- */
- int CheckActiveDataSegment(AliHLTUInt32_t offset, AliHLTUInt32_t size);
-
- /** find an active data segment of certain size with certain offset
- * will see if this is necessary
- * @param offset offset of the data segment in the data buffer
- * @param size size of the data segment in the data buffer
- * @return offset of the data segment
- */
- //AliHLTUInt32_t FindActiveDataSegment(AliHLTUInt32_t offset, AliHLTUInt32_t size);
-
- /** get the number of active segments for this consumer
- * @return number of active segments
- */
- int GetNofActiveSegments() {return fSegments.size();};
+#include "AliHLTComponent.h"
- /**
- */
- int ReleaseActiveDataSegment(AliHLTUInt32_t offset, AliHLTUInt32_t size);
+class AliHLTConsumerDescriptor;
- //ClassDef(AliHLTConsumerDescriptor, 0)
-};
+/** list of AliHLTConsumerDescriptor pointers */
+typedef vector<AliHLTConsumerDescriptor*> AliHLTConsumerDescriptorPList;
/**
* @class AliHLTDataBuffer
* @brief Handling of data buffers for the HLT.
*
- * The class provides handling of data buffers for HLT components. Each component gets its
- * own Data Buffer instance. The buffer is grouped into different data segments according
- * to the output of the component.<br>
- * The Data Buffer keeps control over the data requests of the 'child' componets. Each
- * component can subscribe to a certain segment of the data buffer. It's state is that
- * changed from 'reserved' to 'active'. After the data processing the component has to
- * release the segment and it's state is set to 'processed'.
- * If all components have requested and released their data, the Raw Buffer is released
- * and pushed back in the list of available buffers.
+ * The class provides handling of data buffers for HLT tasks. Each task gets
+ * its own Data Buffer instance. The buffer is grouped into different data
+ * segments according to the output of the component.<br>
+ * The Data Buffer keeps control over the data requests of the 'child'
+ * components. Each component can subscribe to a certain segment of the data
+ * buffer. It's state is then changed from 'reserved' to 'active'. After the
+ * data processing, the component has to release the segment and it's state is
+ * set to 'processed'. If all components have requested and released their data,
+ * the Raw Buffer is released and pushed back in the list of available buffers.
*
* @note This class is only used for the @ref alihlt_system.
*
* @ingroup alihlt_system
*/
-class AliHLTDataBuffer : public AliHLTLogging, public TObject {
+class AliHLTDataBuffer : public TObject, public AliHLTLogging
+{
public:
- ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
- // condtructors and destructors
+ //////////////////////////////////////////////////////////////////////////////
+ // constructors and destructors
/* standard constructor
*/
AliHLTDataBuffer();
-
+ /** destructor */
virtual ~AliHLTDataBuffer();
- ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ //////////////////////////////////////////////////////////////////////////////
// initialization
/**
*/
int SetConsumer(AliHLTComponent* pConsumer);
- ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ //////////////////////////////////////////////////////////////////////////////
// component to component communication
/**
- * Determine the number of matching data blocks for the component and a consumer
- * component. <br>
- * The first approach will support only one output data type for processing components.
+ * Determine the number of matching data blocks for the component and a
+ * consumer component. <br>
+ * The first approach will support only one output data type for processing
+ * components.
* @param pConsumer the component which subscribes to the buffer
* @param tgtList (optional) the list to receive the data types
* @return: number of data blocks which match the input data types
* of the consumer, neg. error code if failed <br>
* -EINVAL invalid parameter <br>
*/
- int FindMatchingDataBlocks(const AliHLTComponent* pConsumer, vector<AliHLTComponent_DataType>* tgtList=NULL);
+ int FindMatchingDataBlocks(const AliHLTComponent* pConsumer,
+ AliHLTComponentDataTypeList* tgtList=NULL);
/**
* Subscribe to a segment of the data buffer.
- * The function prepares the block descriptor for subsequent use with the AliHLTComponent::ProcessEvent
- * method, the method can prepare several block descriptors up to the array size specified by
- * iArraySize. The return value is independent from the array size the number of block descriptors
- * which would have been prepared if there was enough space in the array<br>
+ * The function prepares the block descriptor for subsequent use with the
+ * AliHLTComponent::ProcessEvent method, the method can prepare several block
+ * descriptors up to the array size specified by iArraySize. The return value
+ * is independent from the array size the number of block descriptors which
+ * would have been prepared if there was enough space in the array<br>
* The method is used by the consumer component.
* @param pConsumer the component which subscribes to the buffer
* @param arrayBlockDesc pointer to block descriptor to be filled
* @param iArraySize size of the block descriptor array
- * @return: number of matching data blocks if success, negative error code if failed<br>
- * -EACCESS the state of the consumer can not be changed (activated)
+ * @return: number of matching data blocks, neg. error code if failed<br>
+ * -EACCESS the consumer state can't be changed (activated)
* -EBADF unresolved data segments <br>
* -ENOENT consumer component not found <br>
* -ENODATA data buffer does not have raw data <br>
* -EINVAL invalid parameter <br>
*/
- int Subscribe(const AliHLTComponent* pConsumer, AliHLTComponent_BlockData* arrayBlockDesc, int iArraySize);
+ int Subscribe(const AliHLTComponent* pConsumer,
+ AliHLTComponentBlockData* arrayBlockDesc,
+ int iArraySize);
/**
* Release an instance of the data buffer.
* @param pBlockDesc descriptor of the data segment
* @param pConsumer the component which subscribes to the buffer
* @return: >0 if success, negative error code if failed <br>
- * -EACCESS the state of the consumer can not be changed (de-activated)
- * -ENOENT consumer component has not subscribed to the buffer <br>
+ * -EACCESS the consumer state can not be changed (de-activated)
+ * -ENOENT consumer has not subscribed to the buffer <br>
* -EINVAL invalid parameter <br>
*/
- int Release(AliHLTComponent_BlockData* pBlockDesc, const AliHLTComponent* pConsumer);
+ int Release(AliHLTComponentBlockData* pBlockDesc, const AliHLTComponent* pConsumer);
/**
* Get a target buffer of minimum size iMinSize.
* This is usually done after the component has written the data to the buffer,
* which was requested by the @ref GetTargetBuffer method. The component might
* produce different types of data, for each type a segment has to be defined
- * which describes the data inside the bauffer.<br>
- * The @ref AliHLTComponent_BlockData segment descriptor comes directly from the
- * @ref AliHLTComponent::ProcessEvent method.
+ * which describes the data inside the buffer.<br>
+ * The @ref AliHLTComponentBlockData segment descriptor comes directly from
+ * the @ref AliHLTComponent::ProcessEvent method.
* @param pTgt the target buffer which the segments refer to
* @param arraySegments the output block descriptors of the component
* @param iSize size of the array
*/
- int SetSegments(AliHLTUInt8_t* pTgt, AliHLTComponent_BlockData* arraySegments, int iSize);
+ int SetSegments(AliHLTUInt8_t* pTgt, AliHLTComponentBlockData* arraySegments, int iSize);
/**
* Check if the data buffer is empty.
int GetNofSegments();
/**
- * Get the number of consumers
+ * Get the total number of consumers.
+ * This gives the number of consumers regardless of their state.
* @return number of consumers
*/
int GetNofConsumers();
/**
- * Get the number of active consumers
+ * Get the number of consumers which still need to be processed during
+ * the current event.
+ * @return number of consumers
+ */
+ int GetNofPendingConsumers();
+
+ /**
+ * Get the number of consumers currently under processing.
* @return number of active consumers
*/
int GetNofActiveConsumers();
+ /**
+ * Check if a consumer is already in the list
+ * @param pConsumer pointer to consumer component
+ * @param bAllLists search in all lists if 1
+ * search only in fConsumer list if 0
+ * @return 1 if found, 0 if not
+ */
+ int FindConsumer(AliHLTComponent* pConsumer, int bAllLists=1);
+
+ /**
+ * Public method to reset the buffer.
+ * Eventually with some additional checks. In normal operation,
+ * an external reset should not be necessary.
+ */
+ int Reset();
+
+ /**
+ * @class AliHLTDataSegment
+ * @brief Descriptor of a data segment within the buffer.
+ */
+ class AliHLTDataSegment {
+ friend class AliHLTDataBuffer;
+ friend class AliHLTConsumerDescriptor;
+ public:
+ AliHLTDataSegment()
+ :
+ fDataType(),
+ fSegmentOffset(0),
+ fSegmentSize(0),
+ fSpecification(0)
+ {
+ memset(&fDataType, 0, sizeof(AliHLTComponentDataType));
+ }
+ AliHLTDataSegment(AliHLTUInt32_t offset, AliHLTUInt32_t size)
+ :
+ fDataType(),
+ fSegmentOffset(offset),
+ fSegmentSize(size),
+ fSpecification(0)
+ {
+ memset(&fDataType, 0, sizeof(AliHLTComponentDataType));
+ }
+
+ private:
+ /** the data type of this segment */
+ AliHLTComponentDataType fDataType; // see above
+ /** offset in byte within the data buffer */
+ AliHLTUInt32_t fSegmentOffset; // see above
+ /** size of the actual content */
+ AliHLTUInt32_t fSegmentSize; // see above
+ /** data specification */
+ AliHLTUInt32_t fSpecification; // see above
+ };
+
+ /**
+ * @class AliHLTRawBuffer
+ * @brief Descriptor of the raw data buffer which can host several segments.
+ */
+ class AliHLTRawBuffer {
+ public:
+ /** standard constructor */
+ AliHLTRawBuffer() : fSize(0), fTotalSize(0), fPtr(NULL) {}
+ /** constructor */
+ AliHLTRawBuffer(AliHLTUInt32_t size);
+ /** destructor */
+ virtual ~AliHLTRawBuffer();
+
+ /**
+ * Use a fraction of the buffer.
+ * @param size size in bytes to be used
+ * @return pointer to buffer
+ */
+ AliHLTUInt8_t* UseBuffer(AliHLTUInt32_t size);
+
+ /**
+ * Check whether buffer fits for a request.
+ * @param size size of the request in bytes
+ * @return 1 if buffer is big enough, 0 if not
+ */
+ int CheckSize(AliHLTUInt32_t size) const;
+
+ /**
+ * Get used size of the buffer
+ */
+ AliHLTUInt32_t GetUsedSize() const {return fSize;}
+
+ /**
+ * Get total size of the buffer
+ */
+ AliHLTUInt32_t GetTotalSize() const {return fTotalSize;}
+
+ /**
+ * Get pointer of data buffer
+ */
+ AliHLTUInt8_t* GetPointer() const {return fPtr;}
+
+ /**
+ * Write check pattern
+ */
+ int WritePattern(const char* pattern, int size);
+
+ /**
+ * Check pattern
+ */
+ int CheckPattern(const char* pattern, int size) const;
+
+ /**
+ * Reset buffer.
+ * Data buffer remains allocated, used size set to 0
+ */
+ int Reset();
+
+ int operator==(void*) const;
+ int operator==(AliHLTUInt8_t* ptr) const {return fPtr==ptr;}
+ int operator<=(void*) const;
+ int operator>(void*) const;
+ int operator-(void*) const;
+
+ operator void*() const {return fPtr;}
+ operator AliHLTUInt8_t*() const {return fPtr;}
+
+ private:
+ /** copy constructor prohibited */
+ AliHLTRawBuffer(const AliHLTRawBuffer&);
+ /** assignment operator prohibited */
+ AliHLTRawBuffer& operator=(const AliHLTRawBuffer&);
+
+ /** size of the currently occupied partition of the buffer */
+ AliHLTUInt32_t fSize; // see above
+ /** total size of the buffer, including safety margin */
+ AliHLTUInt32_t fTotalSize; // see above
+ /** the buffer */
+ AliHLTUInt8_t* fPtr; //! transient
+ };
+
private:
+ /** copy constructor prohibited */
+ AliHLTDataBuffer(const AliHLTDataBuffer&);
+ /** assignment operator prohibited */
+ AliHLTDataBuffer& operator=(const AliHLTDataBuffer&);
+
/* lets see if this is needed
- AliHLTDataSegment* FindDataSegment(AliHLTComponent_DataType datatype);
+ AliHLTDataSegment* FindDataSegment(AliHLTComponentDataType datatype);
*/
/**
* of the consumer, neg. error code if failed <br>
* -EINVAL invalid parameter <br>
*/
- int FindMatchingDataSegments(const AliHLTComponent* pConsumer, vector<AliHLTDataSegment>& tgtList);
+ int FindMatchingDataSegments(const AliHLTComponent* pConsumer,
+ vector<AliHLTDataBuffer::AliHLTDataSegment>& tgtList);
/**
* Reset the data buffer.
- * Removes all consumers back to the @ref fConsumers list
- * and releases the Raw Buffer.
+ * Removes all consumers back to the @ref fConsumers list, deletes
+ * segments and releases the Raw Buffer.
*/
int ResetDataBuffer();
+ //////////////////////////////////////////////////////////////////////////////
- ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// the data description
// the data segments within this buffer
- vector<AliHLTDataSegment> fSegments;
+ vector<AliHLTDataSegment> fSegments; // see above
// the list of all consumers which are going to subscribe to the buffer
- vector<AliHLTConsumerDescriptor*> fConsumers;
+ AliHLTConsumerDescriptorPList fConsumers; // see above
// the list of all consumers which are currently subscribed to the buffer
- vector<AliHLTConsumerDescriptor*> fActiveConsumers;
+ AliHLTConsumerDescriptorPList fActiveConsumers; // see above
// the list of all consumers which are already released for the current event
- vector<AliHLTConsumerDescriptor*> fReleasedConsumers;
+ AliHLTConsumerDescriptorPList fReleasedConsumers; // see above
// the buffer instance
- AliHLTRawBuffer* fpBuffer;
+ AliHLTRawBuffer* fpBuffer; //! transient
// flags indicating the state of the buffer
- AliHLTUInt32_t fFlags;
+ AliHLTUInt32_t fFlags; // see above
- ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ //////////////////////////////////////////////////////////////////////////////
// global buffer handling, internal use only
/**
* Create a raw buffer of a certain size.
* The function tries to find a buffer of the given size (or a bit bigger by a
- * certain margin @ref fMargin) from the list of free buffers.
+ * certain margin @ref fgMargin) from the list of free buffers.
* If no buffer is available, a new one is created and added to the buffer handling.
* @param size min. size of the requested buffer
* @return pointer to raw buffer
/**
* Mark a buffer as free.
- * After the Data Buffer has finnished using the raw buffer, it is released and
- * added to the list of available buffers.
+ * After the Data Buffer has finnished using the raw buffer, it is released
+ * and added to the list of available buffers.
* @param pBuffer the raw buffer to release
* @return >=0 if succeeded, neg. error code if failed
*/
/**
* Deletes all the raw buffers.
- * When the last Data Buffer object is destructed, all raw data buffers are relesed.
+ * When the last Data Buffer object is destructed, all raw data buffers are
+ * relesed.
*/
static int DeleteRawBuffers();
/**
* Number of instances of AliHLTDataBuffer.
- * The statice variable is incremented and decremented in the constructor/destructor.
- * All internal data structures are cleaned up when the last instance is exiting.
+ * The statice variable is incremented and decremented in the constructor/
+ * destructor. All internal data structures are cleaned up when the last
+ * instance is exiting.
*/
- static int fNofInstances;
+ static int fgNofInstances; // see above
/** global list of free raw buffers */
- static vector<AliHLTRawBuffer*> fFreeBuffers;
+ static vector<AliHLTRawBuffer*> fgFreeBuffers; // see above
/** global list of currently active raw buffers */
- static vector<AliHLTRawBuffer*> fActiveBuffers;
+ static vector<AliHLTRawBuffer*> fgActiveBuffers; // see above
/** determines the raw buffer size margin at buffer requests */
- static AliHLTUInt32_t fMargin;
+ static AliHLTUInt32_t fgMargin; // see above
/** global instance to HLT logging class for static methods */
- static AliHLTLogging fgLogging;
+ static AliHLTLogging fgLogging; // see above
+
+ /** size of the safety pattern */
+ static const Int_t fgkSafetyPatternSize; // see above
- ////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ /** the safety pattern */
+ static const char fgkSafetyPattern[]; //!transient
+
+ //////////////////////////////////////////////////////////////////////////////
// internal helper functions
/**
* Find the consumer descriptor for a certain component and data type in
* a list of consumers.<br>
- * <b>Note:</b> There are three lists which contain the consumers in the different states.
+ * <b>Note:</b> There are three lists which contain the consumers in the
+ * different states.
* @param pConsumer pointer to consumer component
* @param list list where to search for the consumer
*/
- AliHLTConsumerDescriptor* FindConsumer(const AliHLTComponent* pConsumer, vector<AliHLTConsumerDescriptor*> &list);
+ AliHLTConsumerDescriptor* FindConsumer(const AliHLTComponent* pConsumer,
+ AliHLTConsumerDescriptorPList &list) const;
/**
* Change the state of a consumer.
- * The state of a consumer is determined by the list it is strored in, the method moves a consumer from
- * the source to the target list.
+ * The state of a consumer is determined by the list it is strored in, the
+ * method moves a consumer from the source to the target list.
* @param pDesc pointer to consumer descriptor
* @param srcList list where the consumer is currently to be found
* @param tgtList list where to move the consumer
*/
- int ChangeConsumerState(AliHLTConsumerDescriptor* pDesc, vector<AliHLTConsumerDescriptor*> &srcList, vector<AliHLTConsumerDescriptor*> &tgtList);
+ int ChangeConsumerState(AliHLTConsumerDescriptor* pDesc,
+ AliHLTConsumerDescriptorPList &srcList,
+ AliHLTConsumerDescriptorPList &tgtList);
/**
* Cleanup a consumer list.
ClassDef(AliHLTDataBuffer, 0)
};
+
#endif // ALIHLTDATABUFFER_H
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff