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//------------------------------------------------------------------------------
// GB_mx_cover.c: utilities for test coverage
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
// These functions are compiled along with the GraphBLAS mexFunctions, to
// allow them to copy the statement coverage counts to and from the
// global workspace.
#include "GB_mex.h"
//------------------------------------------------------------------------------
// GB_cover_get: copy coverage counts from the workspace
//------------------------------------------------------------------------------
// This function is called when a GraphBLAS mexFunction starts.
// GraphBLAS_grbcov is an int64 built-in array in the global workspace.
// Its size is GBCOVER_MAX. If the array is empty in the MATLAB workspace, or
// if it doesn't exist, it is created with the correct size. Then the internal
// GB_cov array is copied into it.
void GB_cover_get (bool cover)
{
#ifdef GBCOVER
if (cover)
{
// get GraphBLAS_grbcov from global workspace
mxArray *GB_cov_mx = NULL ;
GB_cov_mx = (mxArray *) mexGetVariablePtr ("global",
"GraphBLAS_grbcov") ;
if (GB_cov_mx == NULL || mxIsEmpty (GB_cov_mx))
{
// doesn't exist; create it and set it to zero
GB_cov_mx = mxCreateNumericMatrix (1, GBCOVER_MAX,
mxINT64_CLASS, mxREAL) ;
// copy it back to the global workspace
mexPutVariable ("global", "GraphBLAS_grbcov", GB_cov_mx) ;
}
// it should exist now, but double-check
if (GB_cov_mx == NULL || mxIsEmpty (GB_cov_mx))
{
mexErrMsgTxt ("GB_cov_mx still null!") ;
}
// get a pointer to the content of the GraphBLAS_grbcov array in the
// workspace
int64_t *g = (int64_t *) mxGetData (GB_cov_mx) ;
// getting paranoid here; this should never happen
if (g == NULL) mexErrMsgTxt ("g null!") ;
// copy the count from the GraphBLAS_grbcov into GB_cov
memcpy (GB_cov, g, GBCOVER_MAX * sizeof (int64_t)) ;
}
#endif
}
//------------------------------------------------------------------------------
// GB_cover_put: copy coverage counts back to the workspace
//------------------------------------------------------------------------------
// This function is called when a GraphBLAS mexFunction finishes. It copies
// the updated statement coverage counters in the GB_cov array back to the
// GraphBLAS_grbcov array in the global workspace where it can be
// analyzed.
void GB_cover_put (bool cover)
{
#ifdef GBCOVER
if (cover)
{
// create a built-in array with the right size
mxArray * GB_cov_mx = mxCreateNumericMatrix (1, GBCOVER_MAX,
mxINT64_CLASS, mxREAL) ;
// copy the updated GB_cov counter array into the built-in array
int64_t *g = (int64_t *) mxGetData (GB_cov_mx) ;
memcpy (g, GB_cov, GBCOVER_MAX * sizeof (int64_t)) ;
// put the built-in array into the global workspace, overwriting the
// version that was already there
mexPutVariable ("global", "GraphBLAS_grbcov", GB_cov_mx) ;
}
#endif
}
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