1 // Copyright (c) 2017, Lawrence Livermore National Security, LLC. Produced at 2 // the Lawrence Livermore National Laboratory. LLNL-CODE-734707. All Rights 3 // reserved. See files LICENSE and NOTICE for details. 4 // 5 // This file is part of CEED, a collection of benchmarks, miniapps, software 6 // libraries and APIs for efficient high-order finite element and spectral 7 // element discretizations for exascale applications. For more information and 8 // source code availability see http://github.com/ceed. 9 // 10 // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC, 11 // a collaborative effort of two U.S. Department of Energy organizations (Office 12 // of Science and the National Nuclear Security Administration) responsible for 13 // the planning and preparation of a capable exascale ecosystem, including 14 // software, applications, hardware, advanced system engineering and early 15 // testbed platforms, in support of the nation's exascale computing imperative. 16 17 /// @file 18 /// Public header for libCEED 19 #ifndef _ceed_h 20 #define _ceed_h 21 22 /** 23 CEED_EXTERN is used in this header to denote all publicly visible symbols. 24 25 No other file should declare publicly visible symbols, thus it should never be 26 used outside ceed.h. 27 */ 28 #ifdef __cplusplus 29 # define CEED_EXTERN extern "C" 30 #else 31 # define CEED_EXTERN extern 32 #endif 33 34 #include <assert.h> 35 #include <stdint.h> 36 #include <stddef.h> 37 #include <stdarg.h> 38 #include <stdio.h> 39 40 // We can discuss ways to avoid forcing these to be compile-time decisions, but let's leave that for later. 41 /// Integer type, used for indexing 42 /// @ingroup Ceed 43 typedef int32_t CeedInt; 44 /// Scalar (floating point) type 45 /// @ingroup Ceed 46 typedef double CeedScalar; 47 48 /// Library context created by CeedInit() 49 /// @ingroup Ceed 50 typedef struct Ceed_private *Ceed; 51 /// Non-blocking Ceed interfaces return a CeedRequest. 52 /// To perform an operation immediately, pass \ref CEED_REQUEST_IMMEDIATE instead. 53 /// @ingroup Ceed 54 typedef struct CeedRequest_private *CeedRequest; 55 /// Handle for vectors over the field \ref CeedScalar 56 /// @ingroup CeedVector 57 typedef struct CeedVector_private *CeedVector; 58 /// Handle for object describing restriction to elements 59 /// @ingroup CeedElemRestriction 60 typedef struct CeedElemRestriction_private *CeedElemRestriction; 61 /// Handle for object describing discrete finite element evaluations 62 /// @ingroup CeedBasis 63 typedef struct CeedBasis_private *CeedBasis; 64 /// Handle for object describing functions evaluated independently at quadrature points 65 /// @ingroup CeedQFunction 66 typedef struct CeedQFunction_private *CeedQFunction; 67 /// Handle for object describing FE-type operators acting on vectors 68 /// 69 /// Given an element restriction \f$E\f$, basis evaluator \f$B\f$, and quadrature function 70 /// \f$f\f$, a CeedOperator expresses operations of the form 71 /// $$ E^T B^T f(B E u) $$ 72 /// acting on the vector \f$u\f$. 73 typedef struct CeedOperator_private *CeedOperator; 74 75 CEED_EXTERN int CeedRegister(const char *prefix, 76 int (*init)(const char *, Ceed), unsigned int priority); 77 78 CEED_EXTERN int CeedInit(const char *resource, Ceed *ceed); 79 CEED_EXTERN int CeedErrorReturn(Ceed, const char *, int, const char *, int, 80 const char *, va_list); 81 CEED_EXTERN int CeedErrorAbort(Ceed, const char *, int, const char *, int, 82 const char *, va_list); 83 CEED_EXTERN int CeedSetErrorHandler(Ceed ceed, 84 int (eh)(Ceed, const char *, int, const char *, 85 int, const char *, va_list)); 86 CEED_EXTERN int CeedErrorImpl(Ceed, const char *, int, const char *, int, 87 const char *, ...); 88 /// Raise an error on ceed object 89 /// 90 /// @param ceed Ceed library context or NULL 91 /// @param ecode Error code (int) 92 /// @param ... printf-style format string followed by arguments as needed 93 /// 94 /// @ingroup Ceed 95 /// @sa CeedSetErrorHandler() 96 #define CeedError(ceed, ecode, ...) \ 97 CeedErrorImpl((ceed), __FILE__, __LINE__, __func__, (ecode), __VA_ARGS__) 98 CEED_EXTERN int CeedDestroy(Ceed *ceed); 99 100 /// Specify memory type 101 /// 102 /// Many Ceed interfaces take or return pointers to memory. This enum is used to 103 /// specify where the memory being provided or requested must reside. 104 /// @ingroup Ceed 105 typedef enum { 106 /// Memory resides on the host 107 CEED_MEM_HOST, 108 /// Memory resides on a device (corresponding to \ref Ceed resource) 109 CEED_MEM_DEVICE, 110 } CeedMemType; 111 112 /// Conveys ownership status of arrays passed to Ceed interfaces. 113 /// @ingroup Ceed 114 typedef enum { 115 /// Implementation will copy the values and not store the passed pointer. 116 CEED_COPY_VALUES, 117 /// Implementation can use and modify the data provided by the user, but does 118 /// not take ownership. 119 CEED_USE_POINTER, 120 /// Implementation takes ownership of the pointer and will free using 121 /// CeedFree() when done using it. The user should not assume that the 122 /// pointer remains valid after ownership has been transferred. Note that 123 /// arrays allocated using C++ operator new or other allocators cannot 124 /// generally be freed using CeedFree(). CeedFree() is capable of freeing any 125 /// memory that can be freed using free(3). 126 CEED_OWN_POINTER, 127 } CeedCopyMode; 128 129 CEED_EXTERN int CeedVectorCreate(Ceed ceed, CeedInt len, CeedVector *vec); 130 CEED_EXTERN int CeedVectorSetArray(CeedVector vec, CeedMemType mtype, 131 CeedCopyMode cmode, CeedScalar *array); 132 CEED_EXTERN int CeedVectorGetArray(CeedVector vec, CeedMemType mtype, 133 CeedScalar **array); 134 CEED_EXTERN int CeedVectorGetArrayRead(CeedVector vec, CeedMemType mtype, 135 const CeedScalar **array); 136 CEED_EXTERN int CeedVectorRestoreArray(CeedVector vec, CeedScalar **array); 137 CEED_EXTERN int CeedVectorRestoreArrayRead(CeedVector vec, 138 const CeedScalar **array); 139 CEED_EXTERN int CeedVectorView(CeedVector vec, const char *fpfmt, FILE *stream); 140 CEED_EXTERN int CeedVectorDestroy(CeedVector *vec); 141 142 CEED_EXTERN CeedRequest *const CEED_REQUEST_IMMEDIATE; 143 CEED_EXTERN CeedRequest *const CEED_REQUEST_ORDERED; 144 CEED_EXTERN int CeedRequestWait(CeedRequest *req); 145 146 CEED_EXTERN CeedElemRestriction CEED_RESTRICTION_IDENTITY; 147 CEED_EXTERN CeedBasis CEED_BASIS_COLOCATED; 148 CEED_EXTERN CeedVector CEED_VECTOR_ACTIVE; 149 CEED_EXTERN CeedVector CEED_VECTOR_NONE; 150 151 /// Denotes whether a linear transformation or its transpose should be applied 152 typedef enum { 153 /// Apply the linear transformation 154 CEED_NOTRANSPOSE, 155 /// Apply the transpose 156 CEED_TRANSPOSE 157 } CeedTransposeMode; 158 159 CEED_EXTERN int CeedElemRestrictionCreate(Ceed ceed, CeedInt nelements, 160 CeedInt esize, CeedInt ndof, CeedInt ncomp, CeedMemType mtype, CeedCopyMode cmode, 161 const CeedInt *indices, CeedElemRestriction *r); 162 163 CEED_EXTERN int CeedElemRestrictionCreateBlocked(Ceed ceed, CeedInt nelements, 164 CeedInt esize, CeedInt blocksize, CeedMemType mtype, CeedCopyMode cmode, 165 CeedInt *blkindices, CeedElemRestriction *r); 166 CEED_EXTERN int CeedElemRestrictionCreateVector(CeedElemRestriction r, 167 CeedVector *lvec, 168 CeedVector *evec); 169 CEED_EXTERN int CeedElemRestrictionGetNumElements(CeedElemRestriction r, 170 CeedInt *numelements); 171 CEED_EXTERN int CeedElemRestrictionApply(CeedElemRestriction r, 172 CeedTransposeMode tmode, CeedTransposeMode lmode, CeedVector u, 173 CeedVector ru, CeedRequest *request); 174 CEED_EXTERN int CeedElemRestrictionDestroy(CeedElemRestriction *r); 175 176 // The formalism here is that we have the structure 177 // \int_\Omega v^T f_0(u, \nabla u, qdata) + (\nabla v)^T f_1(u, \nabla u, qdata) 178 // where gradients are with respect to the reference element. 179 180 /// Basis evaluation mode 181 /// 182 /// Modes can be bitwise ORed when passing to most functions. 183 /// @ingroup CeedBasis 184 typedef enum { 185 /// Perform no evaluation (either because there is no data or it is already at 186 /// quadrature points) 187 CEED_EVAL_NONE = 0, 188 /// Interpolate from nodes to quadrature points 189 CEED_EVAL_INTERP = 1, 190 /// Evaluate gradients at quadrature points from input in a nodal basis 191 CEED_EVAL_GRAD = 2, 192 /// Evaluate divergence at quadrature points from input in a nodal basis 193 CEED_EVAL_DIV = 4, 194 /// Evaluate curl at quadrature points from input in a nodal basis 195 CEED_EVAL_CURL = 8, 196 /// Using no input, evaluate quadrature weights on the reference element 197 CEED_EVAL_WEIGHT = 16, 198 } CeedEvalMode; 199 200 /// Type of quadrature; also used for location of nodes 201 /// @ingroup CeedBasis 202 typedef enum { 203 /// Gauss-Legendre quadrature 204 CEED_GAUSS = 0, 205 /// Gauss-Legendre-Lobatto quadrature 206 CEED_GAUSS_LOBATTO = 1, 207 } CeedQuadMode; 208 209 CEED_EXTERN int CeedBasisCreateTensorH1Lagrange(Ceed ceed, CeedInt dim, 210 CeedInt ndof, CeedInt P, CeedInt Q, CeedQuadMode qmode, CeedBasis *basis); 211 CEED_EXTERN int CeedBasisCreateTensorH1(Ceed ceed, CeedInt dim, CeedInt ndof, 212 CeedInt P1d, CeedInt Q1d, const CeedScalar *interp1d, const CeedScalar *grad1d, 213 const CeedScalar *qref1d, const CeedScalar *qweight1d, CeedBasis *basis); 214 CEED_EXTERN int CeedBasisView(CeedBasis basis, FILE *stream); 215 CEED_EXTERN int CeedQRFactorization(CeedScalar *mat, CeedScalar *tau, CeedInt m, CeedInt n); 216 CEED_EXTERN int CeedBasisGetColocatedGrad(CeedBasis basis, CeedScalar *colograd1d); 217 CEED_EXTERN int CeedBasisApply(CeedBasis basis, CeedTransposeMode tmode, 218 CeedEvalMode emode, const CeedScalar *u, CeedScalar *v); 219 CEED_EXTERN int CeedBasisGetNumNodes(CeedBasis basis, CeedInt *P); 220 CEED_EXTERN int CeedBasisGetNumQuadraturePoints(CeedBasis basis, CeedInt *Q); 221 CEED_EXTERN int CeedBasisDestroy(CeedBasis *basis); 222 223 CEED_EXTERN int CeedGaussQuadrature(CeedInt Q, CeedScalar *qref1d, 224 CeedScalar *qweight1d); 225 CEED_EXTERN int CeedLobattoQuadrature(CeedInt Q, CeedScalar *qref1d, 226 CeedScalar *qweight1d); 227 228 CEED_EXTERN int CeedQFunctionCreateInterior(Ceed ceed, CeedInt vlength, 229 int (*f)(void *ctx, CeedInt nq, const CeedScalar *const *u, 230 CeedScalar *const *v), const char *focca, CeedQFunction *qf); 231 CEED_EXTERN int CeedQFunctionAddInput(CeedQFunction qf, const char *fieldname, 232 CeedInt ncomp, CeedEvalMode emode); 233 CEED_EXTERN int CeedQFunctionAddOutput(CeedQFunction qf, const char *fieldname, 234 CeedInt ncomp, CeedEvalMode emode); 235 CEED_EXTERN int CeedQFunctionGetNumArgs(CeedQFunction qf, CeedInt *numinput, 236 CeedInt *numoutput); 237 CEED_EXTERN int CeedQFunctionSetContext(CeedQFunction qf, void *ctx, 238 size_t ctxsize); 239 CEED_EXTERN int CeedQFunctionApply(CeedQFunction qf, CeedInt Q, 240 const CeedScalar *const *u, 241 CeedScalar *const *v); 242 CEED_EXTERN int CeedQFunctionDestroy(CeedQFunction *qf); 243 244 CEED_EXTERN int CeedOperatorCreate(Ceed ceed, CeedQFunction qf, 245 CeedQFunction dqf, CeedQFunction dqfT, 246 CeedOperator *op); 247 CEED_EXTERN int CeedOperatorSetField(CeedOperator op, const char *fieldname, 248 CeedElemRestriction r, CeedBasis b, 249 CeedVector v); 250 CEED_EXTERN int CeedOperatorApply(CeedOperator op, CeedVector in, 251 CeedVector out, CeedRequest *request); 252 CEED_EXTERN int CeedOperatorDestroy(CeedOperator *op); 253 254 static inline CeedInt CeedPowInt(CeedInt base, CeedInt power) { 255 CeedInt result = 1; 256 while (power) { 257 if (power & 1) result *= base; 258 power >>= 1; 259 base *= base; 260 } 261 return result; 262 } 263 264 #endif 265