nc4cache.c

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/* Copyright 2018, University Corporation for Atmospheric
 * Research. See COPYRIGHT file for copying and redistribution
 * conditions. */
 
#include "config.h"
#include "nc4internal.h"

int
nc_set_chunk_cache(size_t size, size_t nelems, float preemption)
{
    NCglobalstate* gs = NC_getglobalstate();
    if (preemption < 0 || preemption > 1)
        return NC_EINVAL;
    gs->chunkcache.size = size;
    gs->chunkcache.nelems = nelems;
    gs->chunkcache.preemption = preemption;
    return NC_NOERR;
}

int
nc_get_chunk_cache(size_t *sizep, size_t *nelemsp, float *preemptionp)
{
    NCglobalstate* gs = NC_getglobalstate();
    if (sizep)
        *sizep = gs->chunkcache.size;
 
    if (nelemsp)
        *nelemsp = gs->chunkcache.nelems;
 
    if (preemptionp)
        *preemptionp = gs->chunkcache.preemption;
    return NC_NOERR;
}

int
nc_set_chunk_cache_ints(int size, int nelems, int preemption)
{
    NCglobalstate* gs = NC_getglobalstate();
    if (size <= 0 || nelems <= 0 || preemption < 0 || preemption > 100)
        return NC_EINVAL;
    gs->chunkcache.size = (size_t)size;
    gs->chunkcache.nelems = (size_t)nelems;
    gs->chunkcache.preemption = (float)preemption / 100;
    return NC_NOERR;
}

int
nc_get_chunk_cache_ints(int *sizep, int *nelemsp, int *preemptionp)
{
    NCglobalstate* gs = NC_getglobalstate();
    if (sizep)
        *sizep = (int)gs->chunkcache.size;
    if (nelemsp)
        *nelemsp = (int)gs->chunkcache.nelems;
    if (preemptionp)
        *preemptionp = (int)(gs->chunkcache.preemption * 100);
 
    return NC_NOERR;
}
 
#ifndef USE_HDF5
/* See definitions in libhd5/hdf5var.c */
/* Make sure they are always defined */
/* Note: if netcdf-4 is completely disabled, then the definitions in
 * libdispatch/dfile.c take effect.
 */
 
int
nc_set_var_chunk_cache_ints(int ncid, int varid, int size, int nelems,
                            int preemption)
{
    return NC_NOERR;
}
 
int
nc_def_var_chunking_ints(int ncid, int varid, int storage, int *chunksizesp)
{
    return NC_NOERR;
}
 
#endif /*USE_HDF5*/