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#include "Bdef.h"
#if (INTFACE == C_CALL)
void Cfree_blacs_system_handle(int ISysCtxt)
#else
void free_blacs_system_handle_(int *ISysCxt)
#endif
{
#if (INTFACE == C_CALL)
int i, j, DEF_WORLD;
MPI_Comm *tSysCtxt;
extern int BI_MaxNSysCtxt;
extern MPI_Comm *BI_SysContxts;
if ( (ISysCtxt < BI_MaxNSysCtxt) && (ISysCtxt > 0) )
{
if (BI_SysContxts[ISysCtxt] != MPI_COMM_NULL)
BI_SysContxts[ISysCtxt] = MPI_COMM_NULL;
else BI_BlacsWarn(-1, __LINE__, __FILE__,
"Trying to free non-existent system context handle %d", ISysCtxt);
}
else if (ISysCtxt == 0) return; /* never free MPI_COMM_WORLD */
else BI_BlacsWarn(-1, __LINE__, __FILE__,
"Trying to free non-existent system context handle %d", ISysCtxt);
/*
* See if we have freed enough space to decrease the size of our table
*/
for (i=j=0; i < BI_MaxNSysCtxt; i++)
if (BI_SysContxts[i] == MPI_COMM_NULL) j++;
/*
* If needed, get a smaller system context array
*/
if (j > 2*MAXNSYSCTXT)
{
j = BI_MaxNSysCtxt - MAXNSYSCTXT;
tSysCtxt = (MPI_Comm *) malloc(j * sizeof(MPI_Comm));
for (i=j=0; i < BI_MaxNSysCtxt; i++)
{
if (BI_SysContxts[i] != MPI_COMM_NULL)
tSysCtxt[j++] = BI_SysContxts[i];
}
BI_MaxNSysCtxt -= MAXNSYSCTXT;
for(; j < BI_MaxNSysCtxt; j++) tSysCtxt[j] = MPI_COMM_NULL;
free(BI_SysContxts);
BI_SysContxts = tSysCtxt;
}
#endif
}
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