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/* ---------------------------------------------------------------------
*
* -- PBLAS auxiliary routine (version 2.0) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* April 1, 1998
*
* ---------------------------------------------------------------------
*/
/*
* Include files
*/
#include "../pblas.h"
#include "../PBpblas.h"
#include "../PBtools.h"
#include "../PBblacs.h"
#include "../PBblas.h"
#ifdef __STDC__
char * PB_Cgetbuf( char * MESS, int LENGTH )
#else
char * PB_Cgetbuf( MESS, LENGTH )
/*
* .. Scalar Arguments ..
*/
int LENGTH;
/*
* .. Array Arguments ..
*/
char * MESS;
#endif
{
/*
* Purpose
* =======
*
* PB_Cgetbuf allocates a dynamic memory buffer. The routine checks the
* size of the already allocated buffer against the value of the formal
* parameter LENGTH. If the current buffer is large enough, this a poin-
* ter to it is returned. Otherwise, this function tries to allocate it.
* In case of failure, the program is stopped by calling Cblacs_abort.
* When LENGTH is zero, this function returns a NULL pointer. If the va-
* lue of LENGTH is strictly less than zero, the buffer is released.
*
* Arguments
* =========
*
* MESS (local input) pointer to CHAR
* On entry, MESS is a string containing a message to be printed
* in case of allocation failure.
*
* LENGTH (local input) INTEGER
* On entry, LENGTH specifies the length in bytes of the buffer
* to be allocated. If LENGTH is less or equal than zero, this
* function returns NULL.
*
* -- Written on April 1, 1998 by
* Antoine Petitet, University of Tennessee, Knoxville 37996, USA.
*
* ---------------------------------------------------------------------
*/
/*
* .. Local Scalars ..
*/
static char * pblasbuf = NULL;
static int pbbuflen = 0;
/* ..
* .. Executable Statements ..
*
*/
if( LENGTH >= 0 )
{
if( LENGTH > pbbuflen )
{
if( pblasbuf ) free( pblasbuf );
pblasbuf = (char *) malloc( (unsigned) LENGTH );
if( !pblasbuf )
{
(void) fprintf( stderr, "ERROR: Memory allocation failed\n%s\n",
MESS );
Cblacs_abort( -1, -1 );
}
pbbuflen = LENGTH;
}
}
else if( pblasbuf )
{
free( pblasbuf );
pblasbuf = NULL;
pbbuflen = 0;
}
return( pblasbuf );
/*
* End of PB_Cgetbuf
*/
}
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