VOID
CmpLockRegistry(
VOID
)
/*++
Routine Description:
Lock the registry for shared (read-only) access
Arguments:
None.
Return Value:
None, the registry lock will be held for shared access upon return.
--*/
{
#if DBG
PVOID Caller;
PVOID CallerCaller;
#endif
KeEnterCriticalRegion();
ExAcquireResourceShared(&CmpRegistryLock, TRUE);
#if DBG
RtlGetCallersAddress(&Caller, &CallerCaller);
CMLOG(CML_FLOW, CMS_LOCKING) {
KdPrint(("CmpLockRegistry: c, cc: %08lx %08lx\n", Caller, CallerCaller));
}
PVOID
CmpAllocate(
ULONG Size,
BOOLEAN UseForIo,
ULONG Tag
)
/*++
Routine Description:
This routine makes more memory available to a hive.
It is environment specific.
Arguments:
Size - amount of space caller wants
UseForIo - TRUE if object allocated will be target of I/O,
FALSE if not.
Return Value:
NULL if failure, address of allocated block if not.
--*/
{
PVOID result;
ULONG pooltype;
#if DBG
PVOID Caller;
PVOID CallerCaller;
RtlGetCallersAddress(&Caller, &CallerCaller);
#endif
if (CmpClaimGlobalQuota(Size) == FALSE) {
return NULL;
}
pooltype = (UseForIo) ? PagedPoolCacheAligned : PagedPool;
result = ExAllocatePoolWithTag(
pooltype,
Size,
Tag
);
CmKdPrintEx((DPFLTR_CONFIG_ID,CML_POOL,"**CmpAllocate: allocate:%08lx, ", Size));
CmKdPrintEx((DPFLTR_CONFIG_ID,CML_POOL,"type:%d, at:%08lx ", PagedPool, result));
CmKdPrintEx((DPFLTR_CONFIG_ID,CML_POOL,"c:%p cc:%p\n", Caller, CallerCaller));
if (result == NULL) {
CmpReleaseGlobalQuota(Size);
}
return result;
}
VOID
CmpFree(
PVOID MemoryBlock,
ULONG GlobalQuotaSize
)
/*++
Routine Description:
This routine frees memory that has been allocated by the registry.
It is environment specific
Arguments:
MemoryBlock - supplies address of memory object to free
GlobalQuotaSize - amount of global quota to release
Return Value:
NONE
--*/
{
#if DBG
PVOID Caller;
PVOID CallerCaller;
RtlGetCallersAddress(&Caller, &CallerCaller);
CmKdPrintEx((DPFLTR_CONFIG_ID,CML_POOL,"**FREEING:%08lx c,cc:%p,%p\n", MemoryBlock, Caller, CallerCaller));
#endif
ASSERT(GlobalQuotaSize > 0);
CmpReleaseGlobalQuota(GlobalQuotaSize);
ExFreePool(MemoryBlock);
return;
}
