| 1 | /*
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| 2 | * Self-defined petsc.h header for provesa examples: ex2a.c, ex2b.c,ex2c.c,ex2d.c.
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| 3 | * https://repo.anl-external.org/repos/provesa/codes/mxm/
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| 4 | * Full example from PETSc website: http://www.mcs.anl.gov/petsc/petsc-current/src/snes/examples/tutorials/ex5.c.html
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| 5 | */
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| 6 |
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| 7 | #ifndef _PETSC_
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| 8 | #define _PETSC_
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| 9 |
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| 10 | #include <math.h>
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| 11 | #define PetscExpScalar(x) exp(x)
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| 12 |
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| 13 | /* -------Types------- */
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| 14 |
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| 15 | /* PetscErrorCode - datatype used for return error code from almost all PETSc functions */
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| 16 | typedef int PetscErrorCode;
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| 17 |
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| 18 | /* PETSc type that represents a PetscReal.
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| 19 | * This is the same as a PetscReal except in code that is automatically differentiated it
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| 20 | * is treated as a constant (not an indendent or dependent variable)
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| 21 | */
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| 22 | typedef double PassiveReal;
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| 23 |
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| 24 | /* PETSc type that represents integer - used primarily to represent size of arrays and indexing
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| 25 | * into arrays. Its size can be * configured with the option-with-64-bit-indices - to be either
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| 26 | * 32bit or 64bit [default 32 bit ints]
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| 27 | */
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| 28 | typedef int PetscInt;
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| 29 |
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| 30 | /* PetscReal - PETSc type that represents a real number version of PetscScalar */
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| 31 | typedef double PetscReal;
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| 32 |
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| 33 | /* PetscScalar - PETSc type that represents either a double precision real number, a double precision
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| 34 | * complex number, a single precision real number, a long double or an int - if the code is configured
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| 35 | * with --with-scalar-type=real, complex --with-precision=single,double,__float128
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| 36 | */
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| 37 | typedef double PetscScalar;
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| 38 |
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| 39 | /* C struct that contains information about a structured grid and a processors logical location in it. */
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| 40 | typedef struct DMDALocalInfo { /* using distributed arrays */
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| 41 | PetscInt dim,dof,sw;
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| 42 | PetscInt mx,my,mz; /* global number of grid points in each direction */
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| 43 | PetscInt xs,ys,zs; /* starting point of this processor, excluding ghosts */
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| 44 | PetscInt xm,ym,zm; /* number of grid points on this processor, excluding ghosts */
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| 45 | PetscInt gxs,gys,gzs; /* starting point of this processor including ghosts */
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| 46 | PetscInt gxm,gym,gzm; /* number of grid points on this processor including ghosts */
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| 47 | } DMDALocalInfo;
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| 48 |
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| 49 | /* ----------Functions---------- */
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| 50 |
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| 51 | /* First executable line of each PETSc function, used for error handling. Final line of PETSc
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| 52 | * functions should be PetscFunctionReturn(0);
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| 53 | */
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| 54 | #define PetscFunctionBegin
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| 55 |
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| 56 | /* Last executable line of each PETSc function used for error handling. Replaces return() */
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| 57 | //void PetscFunctionReturn(0);
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| 58 | #define PetscFunctionReturn(x) return(x)
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| 59 |
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| 60 | /* Adds floating point operations to the global counter. */
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| 61 | PetscErrorCode PetscLogFlops(double ); //{return 0;}
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| 62 |
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| 63 | /* Checks error code, if non-zero it calls the error handler and then returns */
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| 64 | PetscErrorCode CHKERRQ(PetscErrorCode ); // {return 0;}
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| 65 |
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| 66 | /*
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| 67 | #undef __FUNCT__
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| 68 | #define __FUNCT__ "PetscLogFlops"
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| 69 | PETSC_STATIC_INLINE PetscErrorCode PetscLogFlops(PetscLogDouble n)
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| 70 | {
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| 71 | PetscFunctionBegin;
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| 72 | #if defined(PETSC_USE_DEBUG)
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| 73 | if (n < 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Cannot log negative flops");
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| 74 | #endif
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| 75 | petsc_TotalFlops += PETSC_FLOPS_PER_OP*n;
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| 76 | PetscFunctionReturn(0);
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| 77 | }
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| 78 | */
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| 79 |
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| 80 | #endif
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| 81 |
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| 82 | /******************************************************************************************/
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| 83 | /* about SFI Bratu equation */
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| 84 | /* petsc-2.0.28/src/snes/examples/tutorial/ex5f.F
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| 85 | *
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| 86 | * command: mpirun -np <procs> ex5f [-help] [all PETSc options]
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| 87 | * -par <param>： SFI parameter lambda ：0 <= lambda <= 6.81；
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| 88 | -mx <xg>
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| 89 | -my <yg>
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| 90 | -Nx <npx>
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| 91 | -Ny <npy>
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| 92 | */
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| 93 |
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| 94 | /* static char help[] = "Bratu nonlinear PDE in 2d.\n \
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| 95 | * We solve the Bratu (SFI - solid fuel ignition) problem in a 2D rectangular\n \
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| 96 | * domain, using distributed arrays (DMDAs) to partition the parallel grid.\n \
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| 97 | * The command line options include:\n \
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| 98 | * -par <parameter>, where <parameter> indicates the problem's nonlinearity\n\
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| 99 | * problem SFI: <parameter> = Bratu parameter (0 <= par <= 6.81)\n\n \
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| 100 | * -m_par/n_par <parameter>, where <parameter> indicates an integer\n \
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| 101 | * that MMS3 will be evaluated with 2^m_par, 2^n_par";
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| 102 | */
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