1 2 #include <petsc/private/tsimpl.h> /*I "petscts.h" I*/ 3 4 const char *const TSConvergedReasons_Shifted[] = { 5 "DIVERGED_STEP_REJECTED", 6 "DIVERGED_NONLINEAR_SOLVE", 7 "CONVERGED_ITERATING", 8 "CONVERGED_TIME", 9 "CONVERGED_ITS", 10 "CONVERGED_USER", 11 "CONVERGED_EVENT", 12 "CONVERGED_PSEUDO_FATOL", 13 "CONVERGED_PSEUDO_FATOL", 14 "TSConvergedReason","TS_",0}; 15 const char *const*TSConvergedReasons = TSConvergedReasons_Shifted + 2; 16 17 /*@C 18 TSCreate - This function creates an empty timestepper. The problem type can then be set with TSSetProblemType() and the 19 type of solver can then be set with TSSetType(). 20 21 Collective on MPI_Comm 22 23 Input Parameter: 24 . comm - The communicator 25 26 Output Parameter: 27 . ts - The TS 28 29 Level: beginner 30 31 .keywords: TS, create 32 .seealso: TSSetType(), TSSetUp(), TSDestroy(), TSSetProblemType() 33 @*/ 34 PetscErrorCode TSCreate(MPI_Comm comm, TS *ts) 35 { 36 TS t; 37 PetscErrorCode ierr; 38 39 PetscFunctionBegin; 40 PetscValidPointer(ts,1); 41 *ts = NULL; 42 ierr = TSInitializePackage();CHKERRQ(ierr); 43 44 ierr = PetscHeaderCreate(t, TS_CLASSID, "TS", "Time stepping", "TS", comm, TSDestroy, TSView);CHKERRQ(ierr); 45 46 /* General TS description */ 47 t->problem_type = TS_NONLINEAR; 48 t->vec_sol = NULL; 49 t->numbermonitors = 0; 50 t->snes = NULL; 51 t->setupcalled = 0; 52 t->data = NULL; 53 t->user = NULL; 54 t->ptime = 0.0; 55 t->time_step = 0.1; 56 t->max_time = 5.0; 57 t->steprollback = PETSC_FALSE; 58 t->steprestart = PETSC_FALSE; 59 t->steps = 0; 60 t->max_steps = 5000; 61 t->ksp_its = 0; 62 t->snes_its = 0; 63 t->work = NULL; 64 t->nwork = 0; 65 t->max_snes_failures = 1; 66 t->max_reject = 10; 67 t->errorifstepfailed = PETSC_TRUE; 68 t->rhsjacobian.time = -1e20; 69 t->rhsjacobian.scale = 1.; 70 t->ijacobian.shift = 1.; 71 t->equation_type = TS_EQ_UNSPECIFIED; 72 73 t->atol = 1e-4; 74 t->rtol = 1e-4; 75 t->cfltime = PETSC_MAX_REAL; 76 t->cfltime_local = PETSC_MAX_REAL; 77 t->exact_final_time = TS_EXACTFINALTIME_UNSPECIFIED; 78 t->vec_costintegral = NULL; 79 t->trajectory = NULL; 80 81 /* All methods that do adaptivity should specify 82 * its preferred adapt type in their constructor */ 83 t->default_adapt_type = TSADAPTNONE; 84 85 *ts = t; 86 PetscFunctionReturn(0); 87 } 88