You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
2.3 KiB
96 lines
2.3 KiB
/***
|
|
*heapprm.c - Set/report heap parameters
|
|
*
|
|
* Copyright (c) 1991-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* Set or report the values of certain parameters in the heap.
|
|
*
|
|
*Revision History:
|
|
* 03-04-91 GJF Module created.
|
|
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
|
|
* 04-30-95 GJF Made conditional on WINHEAP.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
|
|
#ifndef WINHEAP
|
|
|
|
|
|
#include <cruntime.h>
|
|
#include <heap.h>
|
|
#include <malloc.h>
|
|
#include <mtdll.h>
|
|
|
|
/***
|
|
*_heap_param(int flag, int param_id, void *pparam) - set or report the values
|
|
* of the specified heap parameter.
|
|
*
|
|
*Purpose:
|
|
* Get or set certain parameters which affect the behavior of the heap.
|
|
* The supported parameters vary implementation to implementation and
|
|
* version to version. See description of entry conditions for the
|
|
* currently supported parameters.
|
|
*
|
|
*Entry:
|
|
* int flag - _HP_GETPARAM, to get a parameter value, or _HP_SETPARAM,
|
|
* to set a parameter value
|
|
*
|
|
* int param_id - identifier for the heap parameter. values supported in
|
|
* this release are:
|
|
*
|
|
* _HP_AMBLKSIZ - _amblksiz (aka _heap_growsize) parameter
|
|
* _HP_GROWSIZE - same as _HP_AMBLKSIZ
|
|
* _HP_RESETSIZE - _heap_resetsize parameter
|
|
*
|
|
* void *pparam - pointer to variable of appropriate type for the heap
|
|
* parameter to be fetched/set
|
|
*
|
|
*Exit:
|
|
* 0 = no error has occurred
|
|
* -1 = an error has occurred (errno is set)
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
int __cdecl _heap_param (
|
|
int flag,
|
|
int param_id,
|
|
void *pparam
|
|
)
|
|
{
|
|
|
|
switch ( param_id ) {
|
|
|
|
case _HP_RESETSIZE:
|
|
if ( flag == _HP_SETPARAM ) {
|
|
_mlock(_HEAP_LOCK);
|
|
_heap_resetsize = *(unsigned *)pparam;
|
|
_munlock(_HEAP_LOCK);
|
|
}
|
|
else
|
|
*(unsigned *)pparam = _heap_resetsize;
|
|
break;
|
|
|
|
case _HP_AMBLKSIZ:
|
|
if ( flag == _HP_SETPARAM )
|
|
/*
|
|
* the only references to _amblksiz (aka
|
|
* _heap_growsize) are atomic. therefore, the
|
|
* heap does not need to be locked.
|
|
*/
|
|
_amblksiz = *(unsigned *)pparam;
|
|
else
|
|
*(unsigned *)pparam = _amblksiz;
|
|
break;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
#endif /* WINHEAP */
|