Date: 2016-03-29T14:56:37+00:00

Actual source code: slepcinit.c
slepc-3.6.3 2016-03-29
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-2015, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.

      8:    SLEPc is free software: you can redistribute it and/or modify it under  the
      9:    terms of version 3 of the GNU Lesser General Public License as published by
     10:    the Free Software Foundation.

     12:    SLEPc  is  distributed in the hope that it will be useful, but WITHOUT  ANY
     13:    WARRANTY;  without even the implied warranty of MERCHANTABILITY or  FITNESS
     14:    FOR  A  PARTICULAR PURPOSE. See the GNU Lesser General Public  License  for
     15:    more details.

     17:    You  should have received a copy of the GNU Lesser General  Public  License
     18:    along with SLEPc. If not, see <http://www.gnu.org/licenses/>.
     19:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     20: */

     22: #include <slepc/private/slepcimpl.h>           /*I "slepcsys.h" I*/
     23: #include <slepc/private/vecimplslepc.h>

     27: /*@C
     28:     SlepcGetVersion - Gets the SLEPc version information in a string.

     30:     Input Parameter:
     31: .   len - length of the string

     33:     Output Parameter:
     34: .   version - version string

     36:     Fortran Note:
     37:     This routine is not supported in Fortran.

     39:     Level: intermediate
     40: @*/
     41: PetscErrorCode SlepcGetVersion(char version[],size_t len)
     42: {

     46: #if (SLEPC_VERSION_RELEASE == 1)
     47:   PetscSNPrintf(version,len,"SLEPc Release Version %d.%d.%d, %s",SLEPC_VERSION_MAJOR,SLEPC_VERSION_MINOR,SLEPC_VERSION_SUBMINOR,SLEPC_VERSION_DATE);
     48: #else
     49:   PetscSNPrintf(version,len,"SLEPc Development GIT revision: %d  GIT Date: %s",SLEPC_VERSION_GIT,SLEPC_VERSION_DATE_GIT);
     50: #endif
     51:   return(0);
     52: }

     56: /*
     57:    SlepcPrintVersion - Prints SLEPc version info.

     59:    Collective on MPI_Comm
     60: */
     61: static PetscErrorCode SlepcPrintVersion(MPI_Comm comm)
     62: {
     64:   char           version[256];

     67:   SlepcGetVersion(version,256);
     68:   (*PetscHelpPrintf)(comm,"--------------------------------------------------------------------------\n");
     69:   (*PetscHelpPrintf)(comm,"%s\n",version);
     70:   (*PetscHelpPrintf)(comm,SLEPC_AUTHOR_INFO);
     71:   (*PetscHelpPrintf)(comm,"See docs/manual.html for help.\n");
     72:   (*PetscHelpPrintf)(comm,"SLEPc libraries linked from %s\n",SLEPC_LIB_DIR);
     73:   return(0);
     74: }

     78: /*
     79:    SlepcPrintHelpIntro - Prints introductory SLEPc help info.

     81:    Collective on MPI_Comm
     82: */
     83: static PetscErrorCode SlepcPrintHelpIntro(MPI_Comm comm)
     84: {
     85:   PetscErrorCode  ierr;

     88:   (*PetscHelpPrintf)(comm,"SLEPc help information includes that for the PETSc libraries, which provide\n");
     89:   (*PetscHelpPrintf)(comm,"low-level system infrastructure and linear algebra tools.\n");
     90:   (*PetscHelpPrintf)(comm,"--------------------------------------------------------------------------\n");
     91:   return(0);
     92: }

     94: /* ------------------------Nasty global variables -------------------------------*/
     95: /*
     96:    Indicates whether SLEPc started PETSc, or whether it was
     97:    already started before SLEPc was initialized.
     98: */
     99: PetscBool SlepcBeganPetsc = PETSC_FALSE;
    100: PetscBool SlepcInitializeCalled = PETSC_FALSE;

    102: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES)

    106: static PetscErrorCode SlepcLoadDynamicLibrary(const char *name,PetscBool *found)
    107: {
    108:   char           libs[PETSC_MAX_PATH_LEN],dlib[PETSC_MAX_PATH_LEN];

    112:   PetscStrcpy(libs,SLEPC_LIB_DIR);
    113:   PetscStrcat(libs,"/libslepc");
    114:   PetscStrcat(libs,name);
    115:   PetscDLLibraryRetrieve(PETSC_COMM_WORLD,libs,dlib,1024,found);
    116:   if (*found) {
    117:     PetscDLLibraryAppend(PETSC_COMM_WORLD,&PetscDLLibrariesLoaded,dlib);
    118:   }
    119:   return(0);
    120: }

    124: /*
    125:     SlepcInitialize_DynamicLibraries - Adds the default dynamic link libraries to the
    126:     search path.
    127: */
    128: PetscErrorCode SlepcInitialize_DynamicLibraries(void)
    129: {
    131:   PetscBool      found;
    132:   PetscBool      preload;

    135:   preload = PETSC_FALSE;
    136:   PetscOptionsGetBool(NULL,"-dynamic_library_preload",&preload,NULL);
    137:   if (preload) {
    138: #if defined(PETSC_USE_SINGLE_LIBRARY)
    139:     SlepcLoadDynamicLibrary("",&found);
    140:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to locate SLEPc dynamic library\nYou cannot move the dynamic libraries!");
    141: #else
    142:     SlepcLoadDynamicLibrary("sys",&found);
    143:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to locate SLEPc dynamic library\nYou cannot move the dynamic libraries!");
    144:     SlepcLoadDynamicLibrary("eps",&found);
    145:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to locate SLEPc dynamic library\nYou cannot move the dynamic libraries!");
    146:     SlepcLoadDynamicLibrary("pep",&found);
    147:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to locate SLEPc dynamic library\nYou cannot move the dynamic libraries!");
    148:     SlepcLoadDynamicLibrary("nep",&found);
    149:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to locate SLEPc dynamic library\nYou cannot move the dynamic libraries!");
    150:     SlepcLoadDynamicLibrary("svd",&found);
    151:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to locate SLEPc dynamic library\nYou cannot move the dynamic libraries!");
    152:     SlepcLoadDynamicLibrary("mfn",&found);
    153:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to locate SLEPc dynamic library\nYou cannot move the dynamic libraries!");
    154: #endif
    155:   }

    157: #if defined(PETSC_HAVE_THREADSAFETY)
    158:   STInitializePackage();
    159:   DSInitializePackage();
    160:   FNInitializePackage();
    161:   BVInitializePackage();
    162:   RGInitializePackage();
    163:   EPSInitializePackage();
    164:   SVDInitializePackage();
    165:   PEPInitializePackage();
    166:   NEPInitializePackage();
    167:   MFNInitializePackage();
    168: #endif
    169:   return(0);
    170: }
    171: #endif

    175: PetscErrorCode SlepcCitationsInitialize()
    176: {

    180:   PetscCitationsRegister("@Article{slepc-toms,\n"
    181:     "   author = \"Vicente Hernandez and Jose E. Roman and Vicente Vidal\",\n"
    182:     "   title = \"{SLEPc}: A Scalable and Flexible Toolkit for the Solution of Eigenvalue Problems\",\n"
    183:     "   journal = \"{ACM} Trans. Math. Software\",\n"
    184:     "   volume = \"31\",\n"
    185:     "   number = \"3\",\n"
    186:     "   pages = \"351--362\",\n"
    187:     "   year = \"2005\"\n"
    188:     "}\n",NULL);
    189:   PetscCitationsRegister("@TechReport{slepc-manual,\n"
    190:     "   author = \"J. E. Roman and C. Campos and E. Romero and A. Tomas\",\n"
    191:     "   title = \"{SLEPc} Users Manual\",\n"
    192:     "   number = \"DSIC-II/24/02 - Revision 3.6\",\n"
    193:     "   institution = \"D. Sistemes Inform\\`atics i Computaci\\'o, Universitat Polit\\`ecnica de Val\\`encia\",\n"
    194:     "   year = \"2015\"\n"
    195:     "}\n",NULL);
    196:   return(0);
    197: }

    201: /*@C
    202:    SlepcInitialize - Initializes the SLEPc library. SlepcInitialize() calls
    203:    PetscInitialize() if that has not been called yet, so this routine should
    204:    always be called near the beginning of your program.

    206:    Collective on MPI_COMM_WORLD or PETSC_COMM_WORLD if it has been set

    208:    Input Parameters:
    209: +  argc - count of number of command line arguments
    210: .  args - the command line arguments
    211: .  file - [optional] PETSc database file, defaults to ~username/.petscrc
    212:           (use NULL for default)
    213: -  help - [optional] Help message to print, use NULL for no message

    215:    Fortran Note:
    216:    Fortran syntax is very similar to that of PetscInitialize()

    218:    Level: beginner

    220: .seealso: SlepcFinalize(), PetscInitialize()
    221: @*/
    222: PetscErrorCode SlepcInitialize(int *argc,char ***args,const char file[],const char help[])
    223: {
    225:   PetscBool      flg;

    228:   if (SlepcInitializeCalled) return(0);
    229:   PetscSetHelpVersionFunctions(SlepcPrintHelpIntro,SlepcPrintVersion);
    230:   PetscInitialized(&flg);
    231:   if (!flg) {
    232:     PetscInitialize(argc,args,file,help);
    233:     SlepcBeganPetsc = PETSC_TRUE;
    234:   }

    236:   SlepcCitationsInitialize();

    238: #if defined(PETSC_HAVE_DYNAMIC_LIBRARIES)
    239:   SlepcInitialize_DynamicLibraries();
    240: #endif

    242: #if defined(PETSC_HAVE_DRAND48)
    243:   /* work-around for Cygwin drand48() initialization bug */
    244:   srand48(0);
    245: #endif

    247:   SlepcInitializeCalled = PETSC_TRUE;
    248:   PetscInfo(0,"SLEPc successfully started\n");
    249:   return(0);
    250: }

    254: /*@
    255:    SlepcFinalize - Checks for options to be called at the conclusion
    256:    of the SLEPc program and calls PetscFinalize().

    258:    Collective on PETSC_COMM_WORLD

    260:    Level: beginner

    262: .seealso: SlepcInitialize(), PetscFinalize()
    263: @*/
    264: PetscErrorCode SlepcFinalize(void)
    265: {

    269:   PetscInfo(0,"SlepcFinalize() called\n");
    270:   if (SlepcBeganPetsc) {
    271:     PetscFinalize();
    272:   }
    273:   SlepcInitializeCalled = PETSC_FALSE;
    274:   return(0);
    275: }

    279: /*@C
    280:    SlepcInitializeNoArguments - Calls SlepcInitialize() from C/C++ without
    281:    the command line arguments.

    283:    Collective

    285:    Level: advanced

    287: .seealso: SlepcInitialize(), SlepcInitializeFortran()
    288: @*/
    289: PetscErrorCode SlepcInitializeNoArguments(void)
    290: {
    292:   int            argc = 0;
    293:   char           **args = 0;

    296:   SlepcInitialize(&argc,&args,NULL,NULL);
    297:   PetscFunctionReturn(ierr);
    298: }

    302: /*@
    303:    SlepcInitialized - Determine whether SLEPc is initialized.

    305:    Level: beginner

    307: .seealso: SlepcInitialize(), SlepcInitializeFortran()
    308: @*/
    309: PetscErrorCode SlepcInitialized(PetscBool *isInitialized)
    310: {
    313:   *isInitialized = SlepcInitializeCalled;
    314:   return(0);
    315: }

    317: PETSC_EXTERN PetscBool PetscBeganMPI;

    321: /*
    322:    SlepcInitializeNoPointers - Calls SlepcInitialize() from C/C++ without the pointers
    323:    to argc and args (analogue to PetscInitializeNoPointers).

    325:    Collective

    327:    Level: advanced

    329: .seealso: SlepcInitialize()
    330: */
    331: PetscErrorCode SlepcInitializeNoPointers(int argc,char **args,const char *filename,const char *help)
    332: {
    334:   int            myargc = argc;
    335:   char           **myargs = args;

    338:   SlepcInitialize(&myargc,&myargs,filename,help);
    339:   PetscPopSignalHandler();
    340:   PetscBeganMPI = PETSC_FALSE;
    341:   PetscFunctionReturn(ierr);
    342: }