windows-nt/Source/XPSP1/NT/net/snmp/newagent/exe/mem.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1992-1997 Microsoft Corporation
Module Name:
mem.c
Abstract:
Contains memory allocation routines for SNMP master agent.
Environment:
User Mode - Win32
Revision History:
10-Feb-1997 DonRyan
Rewrote to implement SNMPv2 support.
--*/
///////////////////////////////////////////////////////////////////////////////
// //
// Include files //
// //
///////////////////////////////////////////////////////////////////////////////
#include "globals.h"
#include "mem.h"
///////////////////////////////////////////////////////////////////////////////
// //
// Private definitions //
// //
///////////////////////////////////////////////////////////////////////////////
#define AGENT_HEAP_FLAGS 0
#define AGENT_HEAP_INITIAL_SIZE 0xffff
#define AGENT_HEAP_MAXIMUM_SIZE 0
///////////////////////////////////////////////////////////////////////////////
// //
// Global variables //
// //
///////////////////////////////////////////////////////////////////////////////
HANDLE g_hAgentHeap = NULL;
///////////////////////////////////////////////////////////////////////////////
// //
// Public procudures //
// //
///////////////////////////////////////////////////////////////////////////////
BOOL
AgentHeapCreate(
)
/*++
Routine Description:
Creates private heap for master agent private structures.
Arguments:
None.
Return Values:
Returns true if successful.
--*/
{
// create master agent heap
g_hAgentHeap = HeapCreate(
AGENT_HEAP_FLAGS,
AGENT_HEAP_INITIAL_SIZE,
AGENT_HEAP_MAXIMUM_SIZE
);
// validate heap handle
if (g_hAgentHeap == NULL) {
SNMPDBG((
SNMP_LOG_ERROR,
"SNMP: SVC: error %d creating agent heap.\n",
GetLastError()
));
}
// return success if created
return (g_hAgentHeap != NULL);
}
BOOL
AgentHeapDestroy(
)
/*++
Routine Description:
Destroys private heap for master agent private structures.
Arguments:
None.
Return Values:
Returns true if successful.
--*/
{
// validate handle
if (g_hAgentHeap != NULL) {
// release heap handle
HeapDestroy(g_hAgentHeap);
// re-initialize
g_hAgentHeap = NULL;
}
return TRUE;
}
LPVOID
AgentMemAlloc(
UINT nBytes
)
/*++
Routine Description:
Allocates memory from master agent's private heap.
Arguments:
None.
Return Values:
Returns true if successful.
--*/
{
// allocate memory from private heap (and initialize)
return HeapAlloc(g_hAgentHeap, HEAP_ZERO_MEMORY, nBytes);
}
VOID
AgentMemFree(
LPVOID pMem
)
/*++
Routine Description:
Frees memory from master agent's private heap.
Arguments:
pMem - pointer to memory block to release.
Return Values:
Returns true if successful.
--*/
{
// validate pointer
if (pMem != NULL) {
// release agent memory
HeapFree(g_hAgentHeap, 0, pMem);
}
}