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//------------------------------------------------------------------------------
// GB_hyper.h: definitions for hypersparse matrices and related methods
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//------------------------------------------------------------------------------
#ifndef GB_HYPER_H
#define GB_HYPER_H
int64_t GB_nvec_nonempty // return # of non-empty vectors
(
const GrB_Matrix A // input matrix to examine
) ;
static inline int64_t GB_nvec_nonempty_get
(
GrB_Matrix A
)
{
int64_t nvec_nonempty = 0 ;
if (A != NULL)
{
GB_ATOMIC_READ
nvec_nonempty = A->nvec_nonempty ;
}
return (nvec_nonempty) ;
}
static inline void GB_nvec_nonempty_set
(
GrB_Matrix A,
int64_t nvec_nonempty
)
{
if (A != NULL)
{
GB_ATOMIC_WRITE
A->nvec_nonempty = nvec_nonempty ;
}
}
static inline int64_t GB_nvec_nonempty_update
(
GrB_Matrix A
)
{
int64_t nvec_nonempty = 0 ;
if (A != NULL)
{
// get the current value of A->nvec_nonempty
nvec_nonempty = GB_nvec_nonempty_get (A) ;
if (nvec_nonempty < 0)
{
// compute A->nvec_nonempty and then update it atomically
nvec_nonempty = GB_nvec_nonempty (A) ;
GB_nvec_nonempty_set (A, nvec_nonempty) ;
}
}
return (nvec_nonempty) ;
}
GrB_Info GB_hyper_realloc
(
GrB_Matrix A, // matrix with hyperlist to reallocate
int64_t plen_new, // new size of A->p and A->h
GB_Werk Werk
) ;
GrB_Info GB_hyper_prune
(
GrB_Matrix A, // matrix to prune
GB_Werk Werk
) ;
bool GB_hyper_hash_need // return true if A needs a hyper hash
(
GrB_Matrix A
) ;
GrB_Matrix GB_hyper_shallow // return C
(
GrB_Matrix C, // output matrix
const GrB_Matrix A // input matrix
) ;
#endif
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