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, CHARACTERISTIC_Solve, CHARACTERISTIC_QueueSetup, CHARACTERISTIC_DAUpdate;
 13: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_HalfTimeLocal, CHARACTERISTIC_HalfTimeRemote, CHARACTERISTIC_HalfTimeExchange;
 14: PETSC_EXTERN PetscLogEvent CHARACTERISTIC_FullTimeLocal, CHARACTERISTIC_FullTimeRemote, CHARACTERISTIC_FullTimeExchange;

 16: #define MAX_COMPONENTS 10

 18: typedef struct _p_Item {
 19:   int           proc; /* Relative processor from which data is required (mapped to absolute by neighbors) */
 20:   int           i, j; /* The vertex for which we need field values */
 21:   PetscScalar   x, y; /* Coordinates of a point on the characteristic */
 22:   PetscScalar   u, v; /* Velocity of a point on the characteristic */
 23:   PetscScalar   field[MAX_COMPONENTS]; /* Field being advected */
 24: } CharacteristicPointDA2D;

 26: typedef CharacteristicPointDA2D *Queue;

 28: struct _CharacteristicOps {
 29:   PetscErrorCode (*view)(Characteristic, PetscViewer);
 30:   PetscErrorCode (*destroy)(Characteristic);
 31:   PetscErrorCode (*setup)(Characteristic);
 32: };

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

 79: PETSC_EXTERN PetscErrorCode CharacteristicSetNeighbors(Characteristic, PetscInt, PetscMPIInt []);
 80: PETSC_EXTERN PetscErrorCode CharacteristicAddPoint(Characteristic, CharacteristicPointDA2D *);
 81: PETSC_EXTERN PetscErrorCode CharacteristicSendCoordinatesBegin(Characteristic);
 82: PETSC_EXTERN PetscErrorCode CharacteristicSendCoordinatesEnd(Characteristic);
 83: PETSC_EXTERN PetscErrorCode CharacteristicGetValuesBegin(Characteristic);
 84: PETSC_EXTERN PetscErrorCode CharacteristicGetValuesEnd(Characteristic);

 86: #endif /*__CHARACTERISTICIMPL_H*/