2: #ifndef __CHARACTERISTICIMPL_H

  5:  #include <petsccharacteristic.h>
  6:  #include <petsc/private/petscimpl.h>

  8: /* Logging support */
  9: PETSC_EXTERN PetscClassId CHARACTERISTIC_CLASSID;
 10: PETSC_EXTERN PetscBool        CharacteristicRegisterAllCalled;
 11: PETSC_EXTERN PetscErrorCode   CharacteristicRegisterAll(void);
 12: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_SetUp;
 13: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_Solve;
 14: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_QueueSetup;
 15: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_DAUpdate;
 16: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_HalfTimeLocal;
 17: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_HalfTimeRemote;
 18: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_HalfTimeExchange;
 19: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_FullTimeLocal;
 20: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_FullTimeRemote;
 21: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_FullTimeExchange;

 23: #define MAX_COMPONENTS 10

 25: typedef struct _p_Item {
 26:   int           proc; /* Relative processor from which data is required (mapped to absolute by neighbors) */
 27:   int           i, j; /* The vertex for which we need field values */
 28:   PetscScalar   x, y; /* Coordinates of a point on the characteristic */
 29:   PetscScalar   u, v; /* Velocity of a point on the characteristic */
 30:   PetscScalar   field[MAX_COMPONENTS]; /* Field being advected */
 31: } CharacteristicPointDA2D;

 33: typedef CharacteristicPointDA2D *Queue;

 35: struct _CharacteristicOps {
 36:   PetscErrorCode (*view)(Characteristic, PetscViewer);
 37:   PetscErrorCode (*destroy)(Characteristic);
 38:   PetscErrorCode (*setup)(Characteristic);
 39: };

 41: struct _p_Characteristic {
 42:   PETSCHEADER(struct _CharacteristicOps);
 43:   PetscInt     setupcalled;
 44:   PetscBool    structured;      /* Flag for mesh type */
 45:   PetscInt     numIds;          /* Number of integers necessary to identify a mesh element */
 46:   /* Velocity interpolation structures */
 47:   DM           velocityDA;      /* DM for the velocity field */
 48:   Vec          velocity;        /* Velocity field at t_n */
 49:   Vec          velocityOld;     /* Velocity field at t_n-1 */
 50:   PetscInt     numVelocityComp; /* Number of velocity components (should be the mesh dimension) */
 51:   PetscInt    *velocityComp;    /* Components of the velocity in the DM */
 52:   PetscErrorCode (*velocityInterp)(Vec, PetscReal [], PetscInt, PetscInt [], PetscScalar [], void *);
 53:   PetscErrorCode (*velocityInterpLocal)(void *, PetscReal [], PetscInt, PetscInt [], PetscScalar [], void *);
 54:   void        *velocityCtx;     /* User context for velocity inteprolation */
 55:   /* Field interpolation structures */
 56:   DM           fieldDA;         /* DM for the field field */
 57:   Vec          field;           /* Field field at t_n */
 58:   Vec          fieldOld;        /* Field field at t_n-1 */
 59:   PetscInt     numFieldComp;    /* Number of field components (should be the mesh dimension) */
 60:   PetscInt    *fieldComp;       /* Components of the field in the DM */
 61:   PetscErrorCode (*fieldInterp)(Vec, PetscReal [], PetscInt, PetscInt [], PetscScalar [], void *);
 62:   PetscErrorCode (*fieldInterpLocal)(void *, PetscReal [], PetscInt, PetscInt [], PetscScalar [], void *);
 63:   void        *fieldCtx;        /* User context for field inteprolation */
 64:   /* Communication structures*/
 65:   MPI_Datatype itemType;        /* Type corresponding to the item struct */
 66:   Queue        queue;
 67:   PetscInt     queueSize;
 68:   PetscInt     queueMax;
 69:   Queue        queueLocal;      /* Queue of Items to receive from other processes */
 70:   PetscInt     queueLocalSize;
 71:   PetscInt     queueLocalMax;
 72:   Queue        queueRemote;     /* Queue of Items to send to other processes */
 73:   PetscInt     queueRemoteSize;
 74:   PetscInt     queueRemoteMax;
 75:   PetscInt     numNeighbors;    /* Number of neighboring processes */
 76:   PetscMPIInt *neighbors;       /* Ranks of neighbors */
 77:   PetscInt    *needCount;       /* Number of Items requested from other processes */
 78:   PetscInt    *localOffsets;    /* Offset into queue for each process (Prefix sums of need_count) */
 79:   PetscInt    *fillCount;       /* Number of Items requested by other processes */
 80:   PetscInt    *remoteOffsets;   /* Offset into remote queue for each process (Prefix sums of fill_count) */
 81:   MPI_Request *request;         /* Requests for sizes/velocities/fields from other processes */
 82:   MPI_Status  *status;          /* Status structues for the persistent requests */
 83:   void        *data;            /* Holder for implementation class */
 84: };

 86: PETSC_EXTERN PetscErrorCode CharacteristicSetNeighbors(Characteristic, PetscInt, PetscMPIInt []);
 87: PETSC_EXTERN PetscErrorCode CharacteristicAddPoint(Characteristic, CharacteristicPointDA2D *);
 88: PETSC_EXTERN PetscErrorCode CharacteristicSendCoordinatesBegin(Characteristic);
 89: PETSC_EXTERN PetscErrorCode CharacteristicSendCoordinatesEnd(Characteristic);
 90: PETSC_EXTERN PetscErrorCode CharacteristicGetValuesBegin(Characteristic);
 91: PETSC_EXTERN PetscErrorCode CharacteristicGetValuesEnd(Characteristic);

 93: #endif /*__CHARACTERISTICIMPL_H*/