Actual source code: taolinesearchimpl.h
petsc-3.7.7 2017-09-25
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      1: #ifndef __TAOLINESEARCH_IMPL_H
      3: #include <petscvec.h>
      4: #include <petsc/private/petscimpl.h>
      5: #include <petsctaolinesearch.h>

      7: typedef struct _TaoLineSearchOps *TaoLineSearchOps;
      8: struct _TaoLineSearchOps {
      9:     PetscErrorCode (*computeobjective)(TaoLineSearch, Vec, PetscReal*, void*);
     10:     PetscErrorCode (*computegradient)(TaoLineSearch, Vec, Vec, void*);
     11:     PetscErrorCode (*computeobjectiveandgradient)(TaoLineSearch, Vec, PetscReal *, Vec, void*);
     12:     PetscErrorCode (*computeobjectiveandgts)(TaoLineSearch, Vec, Vec, PetscReal*, PetscReal*,void*);
     13:     PetscErrorCode (*setup)(TaoLineSearch);
     14:     PetscErrorCode (*apply)(TaoLineSearch,Vec,PetscReal*,Vec,Vec);
     15:     PetscErrorCode (*view)(TaoLineSearch,PetscViewer);
     16:     PetscErrorCode (*setfromoptions)(PetscOptionItems*,TaoLineSearch);
     17:     PetscErrorCode (*reset)(TaoLineSearch);
     18:     PetscErrorCode (*destroy)(TaoLineSearch);
     19: };

     21: struct _p_TaoLineSearch {
     22:     PETSCHEADER(struct _TaoLineSearchOps);
     23:     void *userctx_func;
     24:     void *userctx_grad;
     25:     void *userctx_funcgrad;
     26:     void *userctx_funcgts;

     28:     PetscBool setupcalled;
     29:     PetscBool usegts;
     30:     PetscBool usetaoroutines;
     31:     PetscBool hasobjective;
     32:     PetscBool hasgradient;
     33:     PetscBool hasobjectiveandgradient;
     34:     void *data;

     36:     /* bounds used for some line searches */
     37:     Vec lower;
     38:     Vec upper;
     39:     PetscInt bounded;

     41:     Vec start_x;
     42:     Vec stepdirection;
     43:     PetscReal f_fullstep;
     44:     PetscReal new_f;
     45:     Vec new_x;
     46:     Vec new_g;

     48:     PetscReal step;
     49:     PetscReal initstep;

     51:     PetscInt max_funcs;
     52:     PetscInt nfeval;
     53:     PetscInt ngeval;
     54:     PetscInt nfgeval;
     55:     TaoLineSearchConvergedReason reason;

     57:     PetscReal rtol;      /* relative tol for acceptable step (rtol>0) */
     58:     PetscReal ftol;      /* tol for sufficient decr. condition (ftol>0) */
     59:     PetscReal gtol;      /* tol for curvature condition (gtol>0)*/
     60:     PetscReal stepmin;   /* lower bound for step */
     61:     PetscReal stepmax;   /* upper bound for step */

     63:     Tao tao;
     64: };

     66: extern PetscLogEvent TaoLineSearch_ApplyEvent, TaoLineSearch_EvalEvent;
     67: #endif