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f3e711e2b8
re: https://github.com/Unidata/netcdf-c/issues/2177 re: https://github.com/Unidata/netcdf-c/pull/2178 Provide get/set functions to store global data alignment information and apply it when a file is created. The api is as follows: ```` int nc_set_alignment(int threshold, int alignment); int nc_get_alignment(int* thresholdp, int* alignmentp); ```` If defined, then for every file created opened after the call to nc_set_alignment, for every new variable added to the file, the most recently set threshold and alignment values will be applied to that variable. The nc_get_alignment function return the last values set by nc_set_alignment. If nc_set_alignment has not been called, then it returns the value 0 for both threshold and alignment. The alignment parameters are stored in the NCglobalstate object (see below) for use as needed. Repeated calls to nc_set_alignment will overwrite any existing values in NCglobalstate. The alignment parameters are applied in libhdf5/hdf5create.c and libhdf5/hdf5open.c The set/get alignment functions are defined in libsrc4/nc4internal.c. A test program was added as nc_test4/tst_alignment.c. ## Misc. Changes Unrelated to Alignment * The NCRCglobalstate type was renamed to NCglobalstate to indicate that it represented more general global state than just .rc data. It was also moved to nc4internal.h. This led to a large number of small changes: mostly renaming. The global state management functions were moved to nc4internal.c. * The global chunk cache variables have been moved into NCglobalstate. As warranted, other global state will be moved as well. * Some misc. problems with the nczarr performance tests were corrected.
135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
/*
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Copyright (c) 1998-2018 University Corporation for Atmospheric Research/Unidata
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See LICENSE.txt for license information.
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*/
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#include "config.h"
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#include "ncdispatch.h"
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#include "ncuri.h"
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#include "nclog.h"
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#include "ncbytes.h"
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#include "ncrc.h"
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#include "ncoffsets.h"
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#include "ncpathmgr.h"
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#include "ncxml.h"
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#include "nc4internal.h"
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/* Required for getcwd, other functions. */
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/* Required for getcwd, other functions. */
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#ifdef _WIN32
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#include <direct.h>
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#endif
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#if defined(ENABLE_BYTERANGE) || defined(ENABLE_DAP) || defined(ENABLE_DAP4)
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#include <curl/curl.h>
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#endif
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#ifdef ENABLE_S3_SDK
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#include "ncs3sdk.h"
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#endif
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/* Define vectors of zeros and ones for use with various nc_get_varX functions */
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/* Note, this form of initialization fails under Cygwin */
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size_t NC_coord_zero[NC_MAX_VAR_DIMS] = {0};
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size_t NC_coord_one[NC_MAX_VAR_DIMS] = {1};
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ptrdiff_t NC_stride_one[NC_MAX_VAR_DIMS] = {1};
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/*
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static nc_type longtype = (sizeof(long) == sizeof(int)?NC_INT:NC_INT64);
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static nc_type ulongtype = (sizeof(unsigned long) == sizeof(unsigned int)?NC_UINT:NC_UINT64);
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*/
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/* Allow dispatch to do general initialization and finalization */
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int
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NCDISPATCH_initialize(void)
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{
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int status = NC_NOERR;
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int i;
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NCglobalstate* globalstate = NULL;
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for(i=0;i<NC_MAX_VAR_DIMS;i++) {
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NC_coord_zero[i] = 0;
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NC_coord_one[i] = 1;
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NC_stride_one[i] = 1;
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}
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globalstate = NC_getglobalstate(); /* will allocate and clear */
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/* Capture temp dir*/
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{
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char* tempdir = NULL;
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#if defined _WIN32 || defined __MSYS__ || defined __CYGWIN__
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tempdir = getenv("TEMP");
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#else
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tempdir = "/tmp";
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#endif
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if(tempdir == NULL) {
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fprintf(stderr,"Cannot find a temp dir; using ./\n");
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tempdir = ".";
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}
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globalstate->tempdir= strdup(tempdir);
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}
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/* Capture $HOME */
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{
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char* home = getenv("HOME");
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if(home == NULL) {
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/* use tempdir */
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home = globalstate->tempdir;
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}
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globalstate->home = strdup(home);
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}
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/* Capture $CWD */
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{
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char cwdbuf[4096];
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cwdbuf[0] = '\0';
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(void)NCgetcwd(cwdbuf,sizeof(cwdbuf));
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if(strlen(cwdbuf) == 0) {
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/* use tempdir */
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strcpy(cwdbuf, globalstate->tempdir);
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}
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globalstate->cwd = strdup(cwdbuf);
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}
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ncloginit();
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/* Now load RC Files */
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ncrc_initialize();
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/* Compute type alignments */
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NC_compute_alignments();
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#if defined(ENABLE_BYTERANGE) || defined(ENABLE_DAP) || defined(ENABLE_DAP4)
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/* Initialize curl if it is being used */
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{
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CURLcode cstat = curl_global_init(CURL_GLOBAL_ALL);
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if(cstat != CURLE_OK)
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status = NC_ECURL;
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}
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#endif
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return status;
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}
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int
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NCDISPATCH_finalize(void)
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{
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int status = NC_NOERR;
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NC_freeglobalstate();
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#if defined(ENABLE_BYTERANGE) || defined(ENABLE_DAP) || defined(ENABLE_DAP4)
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curl_global_cleanup();
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#endif
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#if defined(ENABLE_DAP4)
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ncxml_finalize();
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#endif
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return status;
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}
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