mirror of
https://github.com/reactos/reactos.git
synced 2024-11-01 04:11:30 +00:00
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
#pragma once
|
|
|
|
typedef struct _WIN32HEAP WIN32HEAP, *PWIN32HEAP;
|
|
|
|
/*
|
|
typedef struct _W32HEAP_USER_MAPPING
|
|
{
|
|
struct _W32HEAP_USER_MAPPING* Next;
|
|
PVOID KernelMapping;
|
|
PVOID UserMapping;
|
|
ULONG_PTR Limit;
|
|
ULONG Count;
|
|
} W32HEAP_USER_MAPPING, *PW32HEAP_USER_MAPPING;
|
|
*/
|
|
|
|
/* User heap */
|
|
extern HANDLE GlobalUserHeap;
|
|
extern PVOID GlobalUserHeapSection;
|
|
|
|
PWIN32HEAP
|
|
UserCreateHeap(OUT PVOID *SectionObject,
|
|
IN OUT PVOID *SystemBase,
|
|
IN SIZE_T HeapSize);
|
|
|
|
NTSTATUS
|
|
UnmapGlobalUserHeap(IN PEPROCESS Process);
|
|
|
|
NTSTATUS
|
|
MapGlobalUserHeap(IN PEPROCESS Process,
|
|
OUT PVOID* KernelMapping,
|
|
OUT PVOID* UserMapping);
|
|
|
|
static __inline PVOID
|
|
UserHeapAlloc(SIZE_T Bytes)
|
|
{
|
|
/* User heap has no lock, using global user lock instead. */
|
|
ASSERT(UserIsEnteredExclusive());
|
|
return RtlAllocateHeap(GlobalUserHeap,
|
|
HEAP_NO_SERIALIZE,
|
|
Bytes);
|
|
}
|
|
|
|
static __inline BOOL
|
|
UserHeapFree(PVOID lpMem)
|
|
{
|
|
/* User heap has no lock, using global user lock instead. */
|
|
ASSERT(UserIsEnteredExclusive());
|
|
return RtlFreeHeap(GlobalUserHeap,
|
|
HEAP_NO_SERIALIZE,
|
|
lpMem);
|
|
}
|
|
|
|
static __inline PVOID
|
|
UserHeapReAlloc(PVOID lpMem,
|
|
SIZE_T Bytes)
|
|
{
|
|
#if 0
|
|
/* NOTE: ntoskrnl doesn't export RtlReAllocateHeap... */
|
|
return RtlReAllocateHeap(GlobalUserHeap,
|
|
HEAP_NO_SERIALIZE,
|
|
lpMem,
|
|
Bytes);
|
|
#else
|
|
SIZE_T PrevSize;
|
|
PVOID pNew;
|
|
|
|
/* User heap has no lock, using global user lock instead. */
|
|
ASSERT(UserIsEnteredExclusive());
|
|
|
|
PrevSize = RtlSizeHeap(GlobalUserHeap,
|
|
HEAP_NO_SERIALIZE,
|
|
lpMem);
|
|
|
|
if (PrevSize == Bytes)
|
|
return lpMem;
|
|
|
|
pNew = RtlAllocateHeap(GlobalUserHeap,
|
|
HEAP_NO_SERIALIZE,
|
|
Bytes);
|
|
if (pNew != NULL)
|
|
{
|
|
if (PrevSize < Bytes)
|
|
Bytes = PrevSize;
|
|
|
|
RtlCopyMemory(pNew,
|
|
lpMem,
|
|
Bytes);
|
|
|
|
RtlFreeHeap(GlobalUserHeap,
|
|
HEAP_NO_SERIALIZE,
|
|
lpMem);
|
|
}
|
|
|
|
return pNew;
|
|
#endif
|
|
}
|
|
|
|
static __inline PVOID
|
|
UserHeapAddressToUser(PVOID lpMem)
|
|
{
|
|
PPROCESSINFO W32Process = PsGetCurrentProcessWin32Process();
|
|
|
|
/* The first mapping entry is the global user heap mapping */
|
|
return (PVOID)(((ULONG_PTR)lpMem - (ULONG_PTR)GlobalUserHeap) +
|
|
(ULONG_PTR)W32Process->HeapMappings.UserMapping);
|
|
}
|
|
|
|
/* EOF */
|