[409] | 1 | /* |
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| 2 | * Copyright 1996, University Corporation for Atmospheric Research |
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| 3 | * See netcdf/COPYRIGHT file for copying and redistribution conditions. |
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| 4 | */ |
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| 5 | |
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| 6 | #include <config.h> |
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| 7 | #include <stdlib.h> |
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| 8 | |
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| 9 | #include "netcdf.h" |
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| 10 | #include "ncio.h" |
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| 11 | #include "fbits.h" |
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| 12 | |
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| 13 | /* With the advent of diskless io, we need to provide |
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| 14 | for multiple ncio packages at the same time, |
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| 15 | so we have multiple versions of ncio_create. |
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| 16 | */ |
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| 17 | |
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| 18 | /* Define known ncio packages */ |
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| 19 | extern int posixio_create(const char*,int,size_t,off_t,size_t,size_t*,ncio**,void** const); |
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| 20 | extern int posixio_open(const char*,int,off_t,size_t,size_t*,ncio**,void** const); |
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| 21 | |
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| 22 | #ifdef USE_FFIO |
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| 23 | extern int ffio_create(const char*,int,size_t,off_t,size_t,size_t*,ncio**,void** const); |
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| 24 | extern int ffio_open(const char*,int,off_t,size_t,size_t*,ncio**,void** const); |
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| 25 | #endif |
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| 26 | |
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| 27 | #ifdef USE_DISKLESS |
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| 28 | # ifdef USE_MMAP |
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| 29 | extern int mmapio_create(const char*,int,size_t,off_t,size_t,size_t*,ncio**,void** const); |
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| 30 | extern int mmapio_open(const char*,int,off_t,size_t,size_t*,ncio**,void** const); |
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| 31 | # endif |
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| 32 | extern int memio_create(const char*,int,size_t,off_t,size_t,size_t*,ncio**,void** const); |
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| 33 | extern int memio_open(const char*,int,off_t,size_t,size_t*,ncio**,void** const); |
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| 34 | #endif |
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| 35 | |
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| 36 | int |
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| 37 | ncio_create(const char *path, int ioflags, size_t initialsz, |
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| 38 | off_t igeto, size_t igetsz, size_t *sizehintp, |
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| 39 | ncio** iopp, void** const mempp) |
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| 40 | { |
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| 41 | #ifdef USE_DISKLESS |
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| 42 | if(fIsSet(ioflags,NC_DISKLESS)) { |
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| 43 | # ifdef USE_MMAP |
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| 44 | if(fIsSet(ioflags,NC_MMAP)) |
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| 45 | return mmapio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,iopp,mempp); |
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| 46 | else |
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| 47 | # endif /*USE_MMAP*/ |
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| 48 | return memio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,iopp,mempp); |
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| 49 | } |
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| 50 | #endif |
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| 51 | |
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| 52 | #ifdef USE_FFIO |
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| 53 | return ffio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,iopp,mempp); |
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| 54 | #else |
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| 55 | return posixio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,iopp,mempp); |
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| 56 | #endif |
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| 57 | } |
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| 58 | |
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| 59 | int |
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| 60 | ncio_open(const char *path, int ioflags, |
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| 61 | off_t igeto, size_t igetsz, size_t *sizehintp, |
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| 62 | ncio** iopp, void** const mempp) |
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| 63 | { |
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| 64 | /* Diskless open has the following constraints: |
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| 65 | 1. file must be classic version 1 or 2 |
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| 66 | */ |
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| 67 | #ifdef USE_DISKLESS |
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| 68 | if(fIsSet(ioflags,NC_DISKLESS)) { |
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| 69 | # ifdef USE_MMAP |
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| 70 | if(fIsSet(ioflags,NC_MMAP)) |
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| 71 | return mmapio_open(path,ioflags,igeto,igetsz,sizehintp,iopp,mempp); |
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| 72 | else |
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| 73 | # endif /*USE_MMAP*/ |
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| 74 | return memio_open(path,ioflags,igeto,igetsz,sizehintp,iopp,mempp); |
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| 75 | } |
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| 76 | #endif |
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| 77 | #ifdef USE_FFIO |
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| 78 | return ffio_open(path,ioflags,igeto,igetsz,sizehintp,iopp,mempp); |
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| 79 | #else |
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| 80 | return posixio_open(path,ioflags,igeto,igetsz,sizehintp,iopp,mempp); |
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| 81 | #endif |
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| 82 | } |
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| 83 | |
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| 84 | /**************************************************/ |
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| 85 | /* wrapper functions for the ncio dispatch table */ |
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| 86 | |
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| 87 | int |
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| 88 | ncio_rel(ncio *const nciop, off_t offset, int rflags) |
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| 89 | { |
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| 90 | return nciop->rel(nciop,offset,rflags); |
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| 91 | } |
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| 92 | |
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| 93 | int |
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| 94 | ncio_get(ncio *const nciop, off_t offset, size_t extent, |
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| 95 | int rflags, void **const vpp) |
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| 96 | { |
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| 97 | return nciop->get(nciop,offset,extent,rflags,vpp); |
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| 98 | } |
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| 99 | |
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| 100 | int |
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| 101 | ncio_move(ncio *const nciop, off_t to, off_t from, size_t nbytes, int rflags) |
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| 102 | { |
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| 103 | return nciop->move(nciop,to,from,nbytes,rflags); |
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| 104 | } |
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| 105 | |
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| 106 | int |
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| 107 | ncio_sync(ncio *const nciop) |
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| 108 | { |
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| 109 | return nciop->sync(nciop); |
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| 110 | } |
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| 111 | |
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| 112 | int |
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| 113 | ncio_filesize(ncio *nciop, off_t *filesizep) |
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| 114 | { |
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| 115 | return nciop->filesize(nciop,filesizep); |
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| 116 | } |
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| 117 | |
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| 118 | int |
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| 119 | ncio_pad_length(ncio* nciop, off_t length) |
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| 120 | { |
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| 121 | return nciop->pad_length(nciop,length); |
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| 122 | } |
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| 123 | |
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| 124 | int |
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| 125 | ncio_close(ncio *nciop, int doUnlink) |
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| 126 | { |
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| 127 | /* close and release all resources associated |
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| 128 | with nciop, including nciop |
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| 129 | */ |
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| 130 | int status = nciop->close(nciop,doUnlink); |
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| 131 | return status; |
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| 132 | } |
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