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reactos/dll/win32/kernel32/client/heapmem.c
Cameron Gutman c2d0d784c7 [USB-BRINGUP-TRUNK] 
- Create a branch to do a proper merge of USB work from a trunk base instead of from cmake-bringup
- In the future, DO NOT under any circumstances branch another branch. This leads to merge problems!

svn path=/branches/usb-bringup-trunk/; revision=55018
2012-01-20 20:58:46 +00:00

1840 lines
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/*
* PROJECT: ReactOS Win32 Base API
* LICENSE: GPL - See COPYING in the top level directory
* FILE: dll/win32/kernel32/mem/heap.c
* PURPOSE: Heap Memory APIs (wrappers for RtlHeap*)
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
/* INCLUDES *******************************************************************/
#include <k32.h>
#define NDEBUG
#include <debug.h>
/* GLOBALS ********************************************************************/
RTL_HANDLE_TABLE BaseHeapHandleTable;
HANDLE BaseHeap;
ULONG_PTR SystemRangeStart;
/* PRIVATE FUNCTIONS **********************************************************/
VOID
NTAPI
BaseDllInitializeMemoryManager(VOID)
{
BaseHeap = RtlGetProcessHeap();
RtlInitializeHandleTable(0xFFFF,
sizeof(BASE_HEAP_HANDLE_ENTRY),
&BaseHeapHandleTable);
NtQuerySystemInformation(SystemRangeStartInformation,
&SystemRangeStart,
sizeof(SystemRangeStart),
NULL);
}
/* PUBLIC FUNCTIONS ***********************************************************/
/*
* @implemented
*/
HANDLE
WINAPI
HeapCreate(DWORD flOptions,
SIZE_T dwInitialSize,
SIZE_T dwMaximumSize)
{
HANDLE hRet;
ULONG Flags;
/* Remove non-Win32 flags and tag this allocation */
Flags = (flOptions & (HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE)) |
HEAP_CLASS_1;
/* Check if heap is growable and ensure max size is correct */
if (dwMaximumSize == 0)
Flags |= HEAP_GROWABLE;
else if (dwMaximumSize < BaseStaticServerData->SysInfo.PageSize &&
dwInitialSize > dwMaximumSize)
{
/* Max size is non-zero but less than page size which can't be correct.
Fix it up by bumping it to the initial size whatever it is. */
dwMaximumSize = dwInitialSize;
}
/* Call RTL Heap */
hRet = RtlCreateHeap(Flags,
NULL,
dwMaximumSize,
dwInitialSize,
NULL,
NULL);
/* Set the last error if we failed, and return the pointer */
if (!hRet) SetLastError(ERROR_NOT_ENOUGH_MEMORY);
return hRet;
}
/*
* @implemented
*/
BOOL
WINAPI
HeapDestroy(HANDLE hHeap)
{
/* Return TRUE if the heap was destroyed */
if (!RtlDestroyHeap(hHeap)) return TRUE;
/* Otherwise, we got the handle back, so fail */
SetLastError(ERROR_INVALID_HANDLE);
return FALSE;
}
/*
* @implemented
*/
HANDLE
WINAPI
GetProcessHeap(VOID)
{
/* Call the RTL API */
return RtlGetProcessHeap();
}
/*
* @implemented
*/
DWORD
WINAPI
GetProcessHeaps(DWORD NumberOfHeaps,
PHANDLE ProcessHeaps)
{
/* Call the RTL API */
return RtlGetProcessHeaps(NumberOfHeaps, ProcessHeaps);
}
/*
* @implemented
*/
BOOL
WINAPI
HeapLock(HANDLE hHeap)
{
/* Call the RTL API */
return RtlLockHeap(hHeap);
}
/*
* @implemented
*/
BOOL
WINAPI
HeapUnlock(HANDLE hHeap)
{
/* Call the RTL API */
return RtlUnlockHeap(hHeap);
}
/*
* @implemented
*/
SIZE_T
WINAPI
HeapCompact(HANDLE hHeap, DWORD dwFlags)
{
/* Call the RTL API */
return RtlCompactHeap(hHeap, dwFlags);
}
/*
* @implemented
*/
BOOL
WINAPI
HeapValidate(HANDLE hHeap,
DWORD dwFlags,
LPCVOID lpMem)
{
/* Call the RTL API */
return RtlValidateHeap(hHeap, dwFlags, (PVOID)lpMem);
}
/*
* @implemented
*/
DWORD
WINAPI
HeapCreateTagsW(HANDLE hHeap,
DWORD dwFlags,
PWSTR lpTagName,
PWSTR lpTagSubName)
{
/* Call the RTL API */
return RtlCreateTagHeap(hHeap,
dwFlags,
lpTagName,
lpTagSubName);
}
/*
* @implemented
*/
DWORD
WINAPI
HeapExtend(HANDLE hHeap,
DWORD dwFlags,
PVOID BaseAddress,
DWORD dwBytes)
{
NTSTATUS Status;
/* Call the RTL API. Gone in Vista, so commented out. */
Status = STATUS_NOT_IMPLEMENTED; //RtlExtendHeap(hHeap, dwFlags, BaseAddress, dwBytes);
if (!NT_SUCCESS(Status))
{
/* We failed */
BaseSetLastNTError(Status);
return FALSE;
}
/* Return success */
return TRUE;
}
/*
* @implemented
*/
PWSTR
WINAPI
HeapQueryTagW(HANDLE hHeap,
DWORD dwFlags,
WORD wTagIndex,
BOOL bResetCounters,
PVOID lpTagInfo)
{
/* Call the RTL API */
return RtlQueryTagHeap(hHeap,
dwFlags,
wTagIndex,
(BOOLEAN)bResetCounters,
lpTagInfo);
}
/*
* @implemented
*/
BOOL
WINAPI
HeapSummary(HANDLE hHeap,
DWORD dwFlags,
PVOID Summary)
{
NTSTATUS Status;
RTL_HEAP_USAGE Usage;
/* Fill in the length information */
Usage.Length = sizeof(Usage);
/* Call RTL. Gone in Vista, so commented out */
Status = STATUS_NOT_IMPLEMENTED; //RtlUsageHeap(hHeap, dwFlags, &Usage);
if (!NT_SUCCESS(Status))
{
/* We failed */
BaseSetLastNTError(Status);
return FALSE;
}
/* FIXME: Summary == Usage?! */
RtlCopyMemory(Summary, &Usage, sizeof(Usage));
return TRUE;
}
/*
* @implemented
*/
BOOL
WINAPI
HeapUsage(HANDLE hHeap,
DWORD dwFlags,
DWORD Unknown,
DWORD Unknown2,
IN PVOID Usage)
{
NTSTATUS Status;
/* Call RTL. Gone in Vista, so commented out */
Status = STATUS_NOT_IMPLEMENTED; //RtlUsageHeap(hHeap, dwFlags, &Usage);
if (!NT_SUCCESS(Status))
{
/* We failed */
BaseSetLastNTError(Status);
return FALSE;
}
else if (Status == STATUS_MORE_ENTRIES)
{
/* There are still more entries to parse */
return TRUE;
}
/* Otherwise, we're completely done, so we return FALSE, but NO_ERROR */
SetLastError(NO_ERROR);
return FALSE;
}
/*
* @implemented
*/
BOOL
WINAPI
HeapWalk(HANDLE hHeap,
LPPROCESS_HEAP_ENTRY lpEntry)
{
NTSTATUS Status;
DPRINT1("Warning, HeapWalk is calling RtlWalkHeap with Win32 parameters\n");
Status = RtlWalkHeap(hHeap, lpEntry);
if (!NT_SUCCESS(Status))
{
SetLastError(RtlNtStatusToDosError(Status));
return FALSE;
}
return TRUE;
}
/*
* @implemented
*/
BOOL
WINAPI
HeapQueryInformation(HANDLE HeapHandle,
HEAP_INFORMATION_CLASS HeapInformationClass,
PVOID HeapInformation OPTIONAL,
SIZE_T HeapInformationLength OPTIONAL,
PSIZE_T ReturnLength OPTIONAL)
{
NTSTATUS Status;
Status = RtlQueryHeapInformation(HeapHandle,
HeapInformationClass,
HeapInformation,
HeapInformationLength,
ReturnLength);
if (!NT_SUCCESS(Status))
{
BaseSetLastNTError(Status);
return FALSE;
}
return TRUE;
}
/*
* @implemented
*/
BOOL
WINAPI
HeapSetInformation(HANDLE HeapHandle,
HEAP_INFORMATION_CLASS HeapInformationClass,
PVOID HeapInformation OPTIONAL,
SIZE_T HeapInformationLength OPTIONAL)
{
NTSTATUS Status;
Status = RtlSetHeapInformation(HeapHandle,
HeapInformationClass,
HeapInformation,
HeapInformationLength);
if (!NT_SUCCESS(Status))
{
BaseSetLastNTError(Status);
return FALSE;
}
return TRUE;
}
/*
* @implemented
*/
HGLOBAL
NTAPI
GlobalAlloc(UINT uFlags,
SIZE_T dwBytes)
{
ULONG Flags = 0;
PVOID Ptr = NULL;
HANDLE hMemory;
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
BASE_TRACE_ALLOC(dwBytes, uFlags);
ASSERT(BaseHeap);
/* Make sure the flags are valid */
if (uFlags & ~GMEM_VALID_FLAGS)
{
/* They aren't, fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_PARAMETER);
return NULL;
}
/* Convert ZEROINIT */
if (uFlags & GMEM_ZEROINIT) Flags |= HEAP_ZERO_MEMORY;
/* Check if we're not movable, which means pointer-based heap */
if (!(uFlags & GMEM_MOVEABLE))
{
/* Check if this is DDESHARE (deprecated) */
if (uFlags & GMEM_DDESHARE) Flags |= BASE_HEAP_ENTRY_FLAG_DDESHARE;
/* Allocate heap for it */
Ptr = RtlAllocateHeap(BaseHeap, Flags, dwBytes ? dwBytes : 1);
if (!Ptr) SetLastError(ERROR_NOT_ENOUGH_MEMORY);
BASE_TRACE_ALLOC2(Ptr);
return Ptr;
}
/* This is heap based, so lock it in first */
RtlLockHeap(BaseHeap);
/*
* Disable locking, enable custom flags, and write the
* movable flag (deprecated)
*/
Flags |= HEAP_NO_SERIALIZE |
HEAP_SETTABLE_USER_VALUE |
BASE_HEAP_FLAG_MOVABLE;
/* Allocate the handle */
HandleEntry = BaseHeapAllocEntry();
if (!HandleEntry)
{
/* Fail */
hMemory = NULL;
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
BASE_TRACE_FAILURE();
}
else
{
/* Get the object and make sure we have size */
hMemory = &HandleEntry->Object;
if (dwBytes)
{
/* Allocate the actual memory for it */
Ptr = RtlAllocateHeap(BaseHeap, Flags, dwBytes);
BASE_TRACE_PTR(HandleEntry, Ptr);
if (!Ptr)
{
/* We failed, manually set the allocate flag and free the handle */
HandleEntry->Flags = RTL_HANDLE_VALID;
BaseHeapFreeEntry(HandleEntry);
/* For the cleanup case */
HandleEntry = NULL;
}
else
{
/* All worked well, save our heap entry */
RtlSetUserValueHeap(BaseHeap, HEAP_NO_SERIALIZE, Ptr, hMemory);
}
}
}
/* Cleanup! First unlock the heap */
RtlUnlockHeap(BaseHeap);
/* Check if a handle was allocated */
if (HandleEntry)
{
/* Set the pointer and allocated flag */
HandleEntry->Object = Ptr;
HandleEntry->Flags = RTL_HANDLE_VALID;
if (!Ptr)
{
/* We don't have a valid pointer, but so reuse this handle */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSE;
}
/* Check if the handle is discardable */
if (uFlags & GMEM_DISCARDABLE)
{
/* Save it in the handle entry */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSABLE;
}
/* Check if the handle is moveable */
if (uFlags & GMEM_MOVEABLE)
{
/* Save it in the handle entry */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_MOVABLE;
}
/* Check if the handle is DDE Shared */
if (uFlags & GMEM_DDESHARE)
{
/* Save it in the handle entry */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_DDESHARE;
}
/* Set the pointer */
Ptr = hMemory;
}
/* Return the pointer */
return Ptr;
}
/*
* @implemented
*/
SIZE_T
NTAPI
GlobalCompact(DWORD dwMinFree)
{
/* Call the RTL Heap Manager */
return RtlCompactHeap(BaseHeap, 0);
}
/*
* @implemented
*/
VOID
NTAPI
GlobalFix(HGLOBAL hMem)
{
/* Lock the memory if it the handle is valid */
if (INVALID_HANDLE_VALUE != hMem) GlobalLock(hMem);
}
/*
* @implemented
*/
UINT
NTAPI
GlobalFlags(HGLOBAL hMem)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
HANDLE Handle = NULL;
ULONG Flags = 0;
UINT uFlags = GMEM_INVALID_HANDLE;
/* Start by locking the heap */
RtlLockHeap(BaseHeap);
_SEH2_TRY
{
/* Check if this is a simple RTL Heap Managed block */
if (!((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Then we'll query RTL Heap */
RtlGetUserInfoHeap(BaseHeap, Flags, hMem, &Handle, &Flags);
BASE_TRACE_PTR(Handle, hMem);
/*
* Check if RTL Heap didn't find a handle associated with us or
* said that this heap isn't movable, which means something we're
* really not a handle-based heap.
*/
if (!(Handle) || !(Flags & BASE_HEAP_FLAG_MOVABLE))
{
/* Then set the flags to 0 */
uFlags = 0;
}
else
{
/* Otherwise we're handle-based, so get the internal handle */
hMem = Handle;
}
}
/* Check if the handle is actually an entry in our table */
if ((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY)
{
/* Then get the entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
/* Make sure it's a valid handle */
if (BaseHeapValidateEntry(HandleEntry))
{
/* Get the lock count first */
uFlags = HandleEntry->LockCount & GMEM_LOCKCOUNT;
/* Now check if it's discardable */
if (HandleEntry->Flags & BASE_HEAP_ENTRY_FLAG_REUSABLE)
{
/* Set the Win32 Flag */
uFlags |= GMEM_DISCARDABLE;
}
/* Check if it's DDE Shared */
if (HandleEntry->Flags & BASE_HEAP_ENTRY_FLAG_DDESHARE)
{
/* Set the Win32 Flag */
uFlags |= GMEM_DDESHARE;
}
/* Now check if it's discarded */
if (HandleEntry->Flags & BASE_HEAP_ENTRY_FLAG_REUSE)
{
/* Set the Win32 Flag */
uFlags |= GMEM_DISCARDED;
}
}
}
/* Check if by now, we still haven't gotten any useful flags */
if (uFlags == GMEM_INVALID_HANDLE) SetLastError(ERROR_INVALID_HANDLE);
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Set the exception code */
BaseSetLastNTError(_SEH2_GetExceptionCode());
}
_SEH2_END;
/* All done! Unlock heap and return Win32 Flags */
RtlUnlockHeap(BaseHeap);
return uFlags;
}
/*
* @implemented
*/
HGLOBAL
NTAPI
GlobalFree(HGLOBAL hMem)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
LPVOID Ptr;
BASE_TRACE_DEALLOC(hMem);
/* Check if this was a simple allocated heap entry */
if (!((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Free it with the RTL Heap Manager */
if (RtlFreeHeap(BaseHeap, 0, hMem))
{
/* Return NULL since there's no handle */
return NULL;
}
else
{
/* Otherwise fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
return hMem;
}
}
/* It's a handle probably, so lock the heap */
RtlLockHeap(BaseHeap);
_SEH2_TRY
{
/* Make sure that this is an entry in our handle database */
if ((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY)
{
/* Get the entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
/* Make sure the handle is valid */
if (!BaseHeapValidateEntry(HandleEntry))
{
/* It's not, fail */
SetLastError(ERROR_INVALID_HANDLE);
Ptr = NULL;
}
else
{
/* It's valid, so get the pointer */
Ptr = HandleEntry->Object;
/* Free this handle */
BaseHeapFreeEntry(HandleEntry);
/* If the pointer is 0, then we don't have a handle either */
if (!Ptr) hMem = NULL;
}
}
else
{
/* Otherwise, reuse the handle as a pointer */
BASE_TRACE_FAILURE();
Ptr = hMem;
}
/* Check if we got here with a valid heap pointer */
if (Ptr)
{
/* Free it with the RTL Heap Manager */
if (RtlFreeHeap(BaseHeap, HEAP_NO_SERIALIZE, Ptr))
{
/* Everything worked */
hMem = NULL;
}
else
{
/* This wasn't a real heap handle */
SetLastError(ERROR_INVALID_HANDLE);
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Set the exception code */
BaseSetLastNTError(_SEH2_GetExceptionCode());
}
_SEH2_END;
/* We're done, so unlock the heap and return the handle */
RtlUnlockHeap(BaseHeap);
return hMem;
}
/*
* @implemented
*/
HGLOBAL
NTAPI
GlobalHandle(LPCVOID pMem)
{
HANDLE Handle = NULL;
ULONG Flags;
/* Lock the heap */
RtlLockHeap(BaseHeap);
_SEH2_TRY
{
/* Query RTL Heap */
if (!RtlGetUserInfoHeap(BaseHeap,
HEAP_NO_SERIALIZE,
(PVOID)pMem,
&Handle,
&Flags))
{
/* RTL Heap Manager does not know about this heap */
SetLastError(ERROR_INVALID_HANDLE);
}
else
{
/*
* Check if RTL Heap didn't find a handle for us or said that
* this heap isn't movable.
*/
BASE_TRACE_PTR(Handle, pMem);
if (!(Handle) || !(Flags & BASE_HEAP_FLAG_MOVABLE))
{
/* We're actually handle-based, so the pointer is a handle */
Handle = (HANDLE)pMem;
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Set the exception code */
BaseSetLastNTError(_SEH2_GetExceptionCode());
}
_SEH2_END;
/* All done, unlock the heap and return the handle */
RtlUnlockHeap(BaseHeap);
return Handle;
}
/*
* @implemented
*/
LPVOID
NTAPI
GlobalLock(HGLOBAL hMem)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
LPVOID Ptr;
/* Check if this was a simple allocated heap entry */
if (!((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Make sure it's not a kernel or invalid address */
if ((hMem >= (HGLOBAL)SystemRangeStart) || (IsBadReadPtr(hMem, 1)))
{
/* Signal an error */
SetLastError(ERROR_INVALID_HANDLE);
return NULL;
}
/* It's all good */
return hMem;
}
/* Otherwise, lock the heap */
RtlLockHeap(BaseHeap);
_SEH2_TRY
{
/* Get the handle entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
/* Make sure it's valid */
if (!BaseHeapValidateEntry(HandleEntry))
{
/* It's not, fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
Ptr = NULL;
}
else
{
/* Otherwise, get the pointer */
Ptr = HandleEntry->Object;
if (Ptr)
{
/* Increase the lock count, unless we've went too far */
if (HandleEntry->LockCount++ == GMEM_LOCKCOUNT)
{
/* In which case we simply unlock once */
HandleEntry->LockCount--;
}
}
else
{
/* The handle is still there but the memory was already freed */
SetLastError(ERROR_DISCARDED);
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
SetLastError(ERROR_INVALID_HANDLE);
Ptr = NULL;
}
_SEH2_END;
/* All done. Unlock the heap and return the pointer */
RtlUnlockHeap(BaseHeap);
return Ptr;
}
HGLOBAL
NTAPI
GlobalReAlloc(HGLOBAL hMem,
SIZE_T dwBytes,
UINT uFlags)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
HANDLE Handle;
LPVOID Ptr;
ULONG Flags = 0;
/* Throw out invalid flags */
if (uFlags & ~(GMEM_VALID_FLAGS | GMEM_MODIFY))
{
SetLastError(ERROR_INVALID_PARAMETER);
return NULL;
}
/* Throw out invalid combo */
if ((uFlags & GMEM_DISCARDABLE) && !(uFlags & GMEM_MODIFY))
{
SetLastError(ERROR_INVALID_PARAMETER);
return NULL;
}
/* Convert ZEROINIT */
if (uFlags & GMEM_ZEROINIT) Flags |= HEAP_ZERO_MEMORY;
/* If this wasn't a movable heap, then we MUST re-alloc in place */
if (!(uFlags & GMEM_MOVEABLE)) Flags |= HEAP_REALLOC_IN_PLACE_ONLY;
/* Lock the heap and disable built-in locking in the RTL Heap funcitons */
RtlLockHeap(BaseHeap);
Flags |= HEAP_NO_SERIALIZE;
/* Check if this is a simple handle-based block */
if (((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Get the entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
/* Make sure the handle is valid */
if (!BaseHeapValidateEntry(HandleEntry))
{
/* Fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
hMem = NULL;
}
else if (uFlags & GMEM_MODIFY)
{
/* User is changing flags... check if the memory was discardable */
if (uFlags & GMEM_DISCARDABLE)
{
/* Then set the flag */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSABLE;
}
else
{
/* Otherwise, remove the flag */
HandleEntry->Flags &= ~BASE_HEAP_ENTRY_FLAG_REUSABLE;
}
}
else
{
/* Otherwise, get the object and check if we have no size */
Ptr = HandleEntry->Object;
if (!dwBytes)
{
/* Clear the handle and check for a pointer */
hMem = NULL;
if (Ptr)
{
/* Make sure the handle isn't locked */
if ((uFlags & GMEM_MOVEABLE) && !(HandleEntry->LockCount))
{
/* Free the current heap */
if (RtlFreeHeap(BaseHeap, Flags, Ptr))
{
/* Free the handle */
HandleEntry->Object = NULL;
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSE;
/* Get the object pointer */
hMem = &HandleEntry->Object;
}
}
}
else
{
/* Otherwise just return the object pointer */
hMem = &HandleEntry->Object;
}
}
else
{
/* Otherwise, we're allocating, so set the new flags needed */
Flags |= HEAP_SETTABLE_USER_VALUE | BASE_HEAP_FLAG_MOVABLE;
if (!Ptr)
{
/* We don't have a base, so allocate one */
Ptr = RtlAllocateHeap(BaseHeap, Flags, dwBytes);
BASE_TRACE_ALLOC2(Ptr);
if (Ptr)
{
/* Allocation succeeded, so save our entry */
RtlSetUserValueHeap(BaseHeap,
HEAP_NO_SERIALIZE,
Ptr,
hMem);
}
}
else
{
/*
* If it's not movable or currently locked, we MUST allocate
* in-place!
*/
if (!(uFlags & GMEM_MOVEABLE) && (HandleEntry->LockCount))
{
/* Set the flag */
Flags |= HEAP_REALLOC_IN_PLACE_ONLY;
}
else
{
/* Otherwise clear the flag if we set it previously */
Flags &= ~HEAP_REALLOC_IN_PLACE_ONLY;
}
/* Do the re-allocation. No need to save the entry again */
Ptr = RtlReAllocateHeap(BaseHeap, Flags, Ptr, dwBytes);
}
/* Make sure we have a pointer by now */
if (Ptr)
{
/* Write it in the handle entry and mark it in use */
HandleEntry->Object = Ptr;
HandleEntry->Flags &= ~BASE_HEAP_ENTRY_FLAG_REUSE;
}
else
{
/* Otherwise we failed */
hMem = NULL;
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
}
}
}
}
else if (uFlags & GMEM_MODIFY)
{
/* This is not a handle-based heap and the caller wants it to be one */
if (uFlags & GMEM_MOVEABLE)
{
/* Get information on its current state */
Handle = hMem;
if (RtlGetUserInfoHeap(BaseHeap,
HEAP_NO_SERIALIZE,
hMem,
&Handle,
NULL))
{
/*
* Check if the handle matches the pointer or the moveable flag
* isn't there, which is what we expect since it currenly isn't.
*/
if ((Handle == hMem) || !(Flags & BASE_HEAP_FLAG_MOVABLE))
{
/* Allocate a handle for it */
HandleEntry = BaseHeapAllocEntry();
if (!HandleEntry)
{
/* No entry could be allocated */
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
RtlUnlockHeap(BaseHeap);
return NULL;
}
/* Calculate the size of the current heap */
dwBytes = RtlSizeHeap(BaseHeap, HEAP_NO_SERIALIZE, hMem);
/* Set the movable flag */
Flags |= HEAP_SETTABLE_USER_VALUE | BASE_HEAP_FLAG_MOVABLE;
/* Now allocate the actual heap for it */
HandleEntry->Object = RtlAllocateHeap(BaseHeap,
Flags,
dwBytes);
BASE_TRACE_PTR(HandleEntry->Object, HandleEntry);
if (!HandleEntry->Object)
{
/*
* We failed, manually set the allocate flag and
* free the handle
*/
HandleEntry->Flags = RTL_HANDLE_VALID;
BaseHeapFreeEntry(HandleEntry);
/* For the cleanup case */
BASE_TRACE_FAILURE();
HandleEntry = NULL;
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
}
else
{
/* Otherwise, copy the new heap and free the old one */
RtlMoveMemory(HandleEntry->Object, hMem, dwBytes);
RtlFreeHeap(BaseHeap, HEAP_NO_SERIALIZE, hMem);
/* Select the heap pointer */
hMem = (HANDLE)&HandleEntry->Object;
/* Initialize the count and default flags */
HandleEntry->LockCount = 0;
HandleEntry->Flags = RTL_HANDLE_VALID |
BASE_HEAP_ENTRY_FLAG_MOVABLE;
/* Check if it's also discardable */
if (uFlags & GMEM_DISCARDABLE)
{
/* Set the internal flag */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSABLE;
}
/* Check if it's also DDE Shared */
if (uFlags & GMEM_DDESHARE)
{
/* Set the internal flag */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_DDESHARE;
}
/* Allocation succeeded, so save our entry */
RtlSetUserValueHeap(BaseHeap,
HEAP_NO_SERIALIZE,
HandleEntry->Object,
hMem);
}
}
}
}
}
else
{
/* Otherwise, this is a simple RTL Managed Heap, so just call it */
hMem = RtlReAllocateHeap(BaseHeap,
Flags | HEAP_NO_SERIALIZE,
hMem,
dwBytes);
if (!hMem)
{
/* Fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
}
}
/* All done, unlock the heap and return the pointer */
RtlUnlockHeap(BaseHeap);
return hMem;
}
/*
* @implemented
*/
SIZE_T
NTAPI
GlobalSize(HGLOBAL hMem)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
PVOID Handle = NULL;
ULONG Flags = 0;
SIZE_T dwSize = MAXULONG_PTR;
/* Lock the heap */
RtlLockHeap(BaseHeap);
_SEH2_TRY
{
/* Check if this is a simple RTL Heap Managed block */
if (!((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Then we'll query RTL Heap */
if (RtlGetUserInfoHeap(BaseHeap, Flags, hMem, &Handle, &Flags))
{
BASE_TRACE_PTR(Handle, hMem);
/*
* Check if RTL Heap didn't give us a handle or said that this
* heap isn't movable.
*/
if (!(Handle) || !(Flags & BASE_HEAP_FLAG_MOVABLE))
{
/* We're not a handle heap, so use the generic call */
dwSize = RtlSizeHeap(BaseHeap, HEAP_NO_SERIALIZE, hMem);
}
else
{
/* We're a handle heap so get the internal handle */
hMem = Handle;
}
}
}
/* Make sure that this is an entry in our handle database */
if ((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY)
{
/* Get the entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
/* Make sure the handle is valid */
if (!BaseHeapValidateEntry(HandleEntry))
{
/* Fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
}
else if (HandleEntry->Flags & BASE_HEAP_ENTRY_FLAG_REUSE)
{
/* We've reused this block, but we've saved the size for you */
dwSize = HandleEntry->OldSize;
}
else
{
/* Otherwise, query RTL about it */
dwSize = RtlSizeHeap(BaseHeap,
HEAP_NO_SERIALIZE,
HandleEntry->Object);
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Set failure for later */
dwSize = MAXULONG_PTR;
}
_SEH2_END;
/* Check if by now, we still haven't gotten any useful size */
if (dwSize == MAXULONG_PTR)
{
/* Fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
dwSize = 0;
}
/* All done! Unlock heap and return the size */
RtlUnlockHeap(BaseHeap);
return dwSize;
}
/*
* @implemented
*/
VOID
NTAPI
GlobalUnfix(HGLOBAL hMem)
{
/* If the handle is valid, unlock it */
if (hMem != INVALID_HANDLE_VALUE) GlobalUnlock(hMem);
}
/*
* @implemented
*/
BOOL
NTAPI
GlobalUnlock(HGLOBAL hMem)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
BOOL RetVal = TRUE;
/* Check if this was a simple allocated heap entry */
if (!((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY)) return RetVal;
/* Otherwise, lock the heap */
RtlLockHeap(BaseHeap);
/* Get the handle entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
_SEH2_TRY
{
/* Make sure it's valid */
if (!BaseHeapValidateEntry(HandleEntry))
{
/* It's not, fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
RetVal = FALSE;
}
else
{
/* Otherwise, decrement lock count, unless we're already at 0*/
if (!HandleEntry->LockCount--)
{
/* In which case we simply lock it back and fail */
HandleEntry->LockCount++;
SetLastError(ERROR_NOT_LOCKED);
RetVal = FALSE;
}
else if (!HandleEntry->LockCount)
{
/* Nothing to unlock */
SetLastError(NO_ERROR);
RetVal = FALSE;
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
SetLastError(ERROR_INVALID_PARAMETER);
RetVal = FALSE;
}
_SEH2_END;
/* All done. Unlock the heap and return the pointer */
RtlUnlockHeap(BaseHeap);
return RetVal;
}
/*
* @implemented
*/
BOOL
NTAPI
GlobalUnWire(HGLOBAL hMem)
{
/* This is simply an unlock */
return GlobalUnlock(hMem);
}
/*
* @implemented
*/
LPVOID
NTAPI
GlobalWire(HGLOBAL hMem)
{
/* This is just a lock */
return GlobalLock(hMem);
}
/*
* @implemented
*/
BOOL
NTAPI
GlobalMemoryStatusEx(LPMEMORYSTATUSEX lpBuffer)
{
SYSTEM_PERFORMANCE_INFORMATION PerformanceInfo;
VM_COUNTERS VmCounters;
QUOTA_LIMITS QuotaLimits;
ULONGLONG PageFile, PhysicalMemory;
/* Query performance information */
NtQuerySystemInformation(SystemPerformanceInformation,
&PerformanceInfo,
sizeof(PerformanceInfo),
NULL);
/* Calculate memory load */
lpBuffer->dwMemoryLoad = ((DWORD)(BaseStaticServerData->SysInfo.NumberOfPhysicalPages -
PerformanceInfo.AvailablePages) * 100) /
BaseStaticServerData->SysInfo.NumberOfPhysicalPages;
/* Save physical memory */
PhysicalMemory = BaseStaticServerData->SysInfo.NumberOfPhysicalPages *
BaseStaticServerData->SysInfo.PageSize;
lpBuffer->ullTotalPhys = PhysicalMemory;
/* Now save available physical memory */
PhysicalMemory = PerformanceInfo.AvailablePages *
BaseStaticServerData->SysInfo.PageSize;
lpBuffer->ullAvailPhys = PhysicalMemory;
/* Query VM and Quota Limits */
NtQueryInformationProcess(NtCurrentProcess(),
ProcessQuotaLimits,
&QuotaLimits,
sizeof(QUOTA_LIMITS),
NULL);
NtQueryInformationProcess(NtCurrentProcess(),
ProcessVmCounters,
&VmCounters,
sizeof(VM_COUNTERS),
NULL);
/* Save the commit limit */
lpBuffer->ullTotalPageFile = min(QuotaLimits.PagefileLimit,
PerformanceInfo.CommitLimit);
/* Calculate how many pages are left */
PageFile = PerformanceInfo.CommitLimit - PerformanceInfo.CommittedPages;
/* Save the total */
lpBuffer->ullAvailPageFile = min(PageFile,
QuotaLimits.PagefileLimit -
VmCounters.PagefileUsage);
lpBuffer->ullAvailPageFile *= BaseStaticServerData->SysInfo.PageSize;
/* Now calculate the total virtual space */
lpBuffer->ullTotalVirtual = (BaseStaticServerData->SysInfo.MaximumUserModeAddress -
BaseStaticServerData->SysInfo.MinimumUserModeAddress) + 1;
/* And finally the avilable virtual space */
lpBuffer->ullAvailVirtual = lpBuffer->ullTotalVirtual -
VmCounters.VirtualSize;
lpBuffer->ullAvailExtendedVirtual = 0;
return TRUE;
}
/*
* @implemented
*/
VOID
NTAPI
GlobalMemoryStatus(LPMEMORYSTATUS lpBuffer)
{
MEMORYSTATUSEX lpBufferEx;
/* Call the extended function */
lpBufferEx.dwLength = sizeof(MEMORYSTATUSEX);
if (GlobalMemoryStatusEx(&lpBufferEx))
{
/* Reset the right size and fill out the information */
lpBuffer->dwLength = sizeof(MEMORYSTATUS);
lpBuffer->dwMemoryLoad = lpBufferEx.dwMemoryLoad;
lpBuffer->dwTotalPhys = (SIZE_T)lpBufferEx.ullTotalPhys;
lpBuffer->dwAvailPhys = (SIZE_T)lpBufferEx.ullAvailPhys;
lpBuffer->dwTotalPageFile = (SIZE_T)lpBufferEx.ullTotalPageFile;
lpBuffer->dwAvailPageFile = (SIZE_T)lpBufferEx.ullAvailPageFile;
lpBuffer->dwTotalVirtual = (SIZE_T)lpBufferEx.ullTotalVirtual;
lpBuffer->dwAvailVirtual = (SIZE_T)lpBufferEx.ullAvailVirtual;
}
}
/*
* @implemented
*/
HLOCAL
NTAPI
LocalAlloc(UINT uFlags,
SIZE_T dwBytes)
{
ULONG Flags = 0;
PVOID Ptr = NULL;
HANDLE hMemory;
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
BASE_TRACE_ALLOC(dwBytes, uFlags);
ASSERT(BaseHeap);
/* Make sure the flags are valid */
if (uFlags & ~LMEM_VALID_FLAGS)
{
/* They aren't, fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_PARAMETER);
return NULL;
}
/* Convert ZEROINIT */
if (uFlags & LMEM_ZEROINIT) Flags |= HEAP_ZERO_MEMORY;
/* Check if we're not movable, which means pointer-based heap */
if (!(uFlags & LMEM_MOVEABLE))
{
/* Allocate heap for it */
Ptr = RtlAllocateHeap(BaseHeap, Flags, dwBytes);
BASE_TRACE_ALLOC2(Ptr);
return Ptr;
}
/* This is heap based, so lock it in first */
RtlLockHeap(BaseHeap);
/*
* Disable locking, enable custom flags, and write the
* movable flag (deprecated)
*/
Flags |= HEAP_NO_SERIALIZE |
HEAP_SETTABLE_USER_VALUE |
BASE_HEAP_FLAG_MOVABLE;
/* Allocate the handle */
HandleEntry = BaseHeapAllocEntry();
if (!HandleEntry)
{
/* Fail */
hMemory = NULL;
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
BASE_TRACE_FAILURE();
goto Quickie;
}
/* Get the object and make sure we have size */
hMemory = &HandleEntry->Object;
if (dwBytes)
{
/* Allocate the actual memory for it */
Ptr = RtlAllocateHeap(BaseHeap, Flags, dwBytes);
BASE_TRACE_PTR(HandleEntry, Ptr);
if (!Ptr)
{
/* We failed, manually set the allocate flag and free the handle */
HandleEntry->Flags = RTL_HANDLE_VALID;
BaseHeapFreeEntry(HandleEntry);
/* For the cleanup case */
HandleEntry = NULL;
}
else
{
/* All worked well, save our heap entry */
RtlSetUserValueHeap(BaseHeap, HEAP_NO_SERIALIZE, Ptr, hMemory);
}
}
Quickie:
/* Cleanup! First unlock the heap */
RtlUnlockHeap(BaseHeap);
/* Check if a handle was allocated */
if (HandleEntry)
{
/* Set the pointer and allocated flag */
HandleEntry->Object = Ptr;
HandleEntry->Flags = RTL_HANDLE_VALID;
if (!Ptr)
{
/* We don't have a valid pointer, but so reuse this handle */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSE;
}
/* Check if the handle is discardable */
if (uFlags & GMEM_DISCARDABLE)
{
/* Save it in the handle entry */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSABLE;
}
/* Check if the handle is moveable */
if (uFlags & GMEM_MOVEABLE)
{
/* Save it in the handle entry */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_MOVABLE;
}
/* Set the pointer */
Ptr = hMemory;
}
/* Return the pointer */
return Ptr;
}
/*
* @implemented
*/
SIZE_T
NTAPI
LocalCompact(UINT dwMinFree)
{
/* Call the RTL Heap Manager */
return RtlCompactHeap(BaseHeap, 0);
}
/*
* @implemented
*/
UINT
NTAPI
LocalFlags(HLOCAL hMem)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
HANDLE Handle = NULL;
ULONG Flags = 0;
UINT uFlags = LMEM_INVALID_HANDLE;
/* Start by locking the heap */
RtlLockHeap(BaseHeap);
/* Check if this is a simple RTL Heap Managed block */
if (!((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Then we'll query RTL Heap */
RtlGetUserInfoHeap(BaseHeap, Flags, hMem, &Handle, &Flags);
BASE_TRACE_PTR(Handle, hMem);
/*
* Check if RTL Heap didn't find a handle associated with us or
* said that this heap isn't movable, which means something we're
* really not a handle-based heap.
*/
if (!(Handle) || !(Flags & BASE_HEAP_FLAG_MOVABLE))
{
/* Then set the flags to 0 */
uFlags = 0;
}
else
{
/* Otherwise we're handle-based, so get the internal handle */
hMem = Handle;
}
}
/* Check if the handle is actually an entry in our table */
if ((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY)
{
/* Then get the entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
/* Make sure it's a valid handle */
if (BaseHeapValidateEntry(HandleEntry))
{
/* Get the lock count first */
uFlags = HandleEntry->LockCount & LMEM_LOCKCOUNT;
/* Now check if it's discardable */
if (HandleEntry->Flags & BASE_HEAP_ENTRY_FLAG_REUSABLE)
{
/* Set the Win32 Flag */
uFlags |= LMEM_DISCARDABLE;
}
/* Now check if it's discarded */
if (HandleEntry->Flags & BASE_HEAP_ENTRY_FLAG_REUSE)
/* Set the Win32 Flag */
uFlags |= LMEM_DISCARDED;
}
}
/* Check if by now, we still haven't gotten any useful flags */
if (uFlags == LMEM_INVALID_HANDLE) SetLastError(ERROR_INVALID_HANDLE);
/* All done! Unlock heap and return Win32 Flags */
RtlUnlockHeap(BaseHeap);
return uFlags;
}
/*
* @implemented
*/
HLOCAL
NTAPI
LocalFree(HLOCAL hMem)
{
/* This is identical to a Global Free */
return GlobalFree(hMem);
}
/*
* @implemented
*/
HLOCAL
NTAPI
LocalHandle(LPCVOID pMem)
{
/* This is identical to a Global Handle */
return GlobalHandle(pMem);
}
/*
* @implemented
*/
LPVOID
NTAPI
LocalLock(HLOCAL hMem)
{
/* This is the same as a GlobalLock, assuming these never change */
C_ASSERT(LMEM_LOCKCOUNT == GMEM_LOCKCOUNT);
return GlobalLock(hMem);
}
HLOCAL
NTAPI
LocalReAlloc(HLOCAL hMem,
SIZE_T dwBytes,
UINT uFlags)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
LPVOID Ptr;
ULONG Flags = 0;
/* Convert ZEROINIT */
if (uFlags & LMEM_ZEROINIT) Flags |= HEAP_ZERO_MEMORY;
/* If this wasn't a movable heap, then we MUST re-alloc in place */
if (!(uFlags & LMEM_MOVEABLE)) Flags |= HEAP_REALLOC_IN_PLACE_ONLY;
/* Lock the heap and disable built-in locking in the RTL Heap funcitons */
RtlLockHeap(BaseHeap);
Flags |= HEAP_NO_SERIALIZE;
/* Check if this is a simple handle-based block */
if (((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Get the entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
/* Make sure the handle is valid */
if (!BaseHeapValidateEntry(HandleEntry))
{
/* Fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
hMem = NULL;
}
else if (uFlags & LMEM_MODIFY)
{
/* User is changing flags... check if the memory was discardable */
if (uFlags & LMEM_DISCARDABLE)
{
/* Then set the flag */
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSABLE;
}
else
{
/* Otherwise, remove the flag */
HandleEntry->Flags &= ~BASE_HEAP_ENTRY_FLAG_REUSABLE;
}
}
else
{
/* Otherwise, get the object and check if we have no size */
Ptr = HandleEntry->Object;
if (!dwBytes)
{
/* Clear the handle and check for a pointer */
hMem = NULL;
if (Ptr)
{
/* Make sure the handle isn't locked */
if ((uFlags & LMEM_MOVEABLE) && !(HandleEntry->LockCount))
{
/* Free the current heap */
RtlFreeHeap(BaseHeap, Flags, Ptr);
/* Free the handle */
HandleEntry->Object = NULL;
HandleEntry->Flags |= BASE_HEAP_ENTRY_FLAG_REUSE;
/* Get the object pointer */
hMem = &HandleEntry->Object;
}
}
else
{
/* Otherwise just return the object pointer */
hMem = &HandleEntry->Object;
}
}
else
{
/* Otherwise, we're allocating, so set the new flags needed */
Flags |= HEAP_SETTABLE_USER_VALUE | BASE_HEAP_FLAG_MOVABLE;
if (!Ptr)
{
/* We don't have a base, so allocate one */
Ptr = RtlAllocateHeap(BaseHeap, Flags, dwBytes);
BASE_TRACE_ALLOC2(Ptr);
if (Ptr)
{
/* Allocation succeeded, so save our entry */
RtlSetUserValueHeap(BaseHeap,
HEAP_NO_SERIALIZE,
Ptr,
hMem);
}
}
else
{
/*
* If it's not movable or currently locked, we MUST allocate
* in-place!
*/
if (!(uFlags & LMEM_MOVEABLE) && (HandleEntry->LockCount))
{
/* Set the flag */
Flags |= HEAP_REALLOC_IN_PLACE_ONLY;
}
else
{
/* Otherwise clear the flag if we set it previously */
Flags &= ~HEAP_REALLOC_IN_PLACE_ONLY;
}
/* And do the re-allocation */
Ptr = RtlReAllocateHeap(BaseHeap, Flags, Ptr, dwBytes);
}
/* Make sure we have a pointer by now */
if (Ptr)
{
/* Write it in the handle entry and mark it in use */
HandleEntry->Object = Ptr;
HandleEntry->Flags &= ~BASE_HEAP_ENTRY_FLAG_REUSE;
}
else
{
/* Otherwise we failed */
hMem = NULL;
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
}
}
}
}
else if (!(uFlags & LMEM_MODIFY))
{
/* Otherwise, this is a simple RTL Managed Heap, so just call it */
hMem = RtlReAllocateHeap(BaseHeap,
Flags | HEAP_NO_SERIALIZE,
hMem,
dwBytes);
if (!hMem)
{
/* Fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
}
}
/* All done, unlock the heap and return the pointer */
RtlUnlockHeap(BaseHeap);
return hMem;
}
/*
* @implemented
*/
SIZE_T
WINAPI
LocalShrink(HLOCAL hMem,
UINT cbNewSize)
{
/* Call RTL */
return RtlCompactHeap(BaseHeap, 0);
}
/*
* @implemented
*/
SIZE_T
NTAPI
LocalSize(HLOCAL hMem)
{
/* This is the same as a Global Size */
return GlobalSize(hMem);
}
/*
* @implemented
*/
BOOL
NTAPI
LocalUnlock(HLOCAL hMem)
{
PBASE_HEAP_HANDLE_ENTRY HandleEntry;
BOOL RetVal = TRUE;
/* Check if this was a simple allocated heap entry */
if (!((ULONG_PTR)hMem & BASE_HEAP_IS_HANDLE_ENTRY))
{
/* Fail, because LocalUnlock is not supported on LMEM_FIXED allocations */
SetLastError(ERROR_NOT_LOCKED);
return FALSE;
}
/* Otherwise, lock the heap */
RtlLockHeap(BaseHeap);
/* Get the handle entry */
HandleEntry = BaseHeapGetEntry(hMem);
BASE_TRACE_HANDLE(HandleEntry, hMem);
_SEH2_TRY
{
/* Make sure it's valid */
if (!BaseHeapValidateEntry(HandleEntry))
{
/* It's not, fail */
BASE_TRACE_FAILURE();
SetLastError(ERROR_INVALID_HANDLE);
RetVal = FALSE;
}
else
{
/* Otherwise, decrement lock count, unless we're already at 0*/
if (!HandleEntry->LockCount--)
{
/* In which case we simply lock it back and fail */
HandleEntry->LockCount++;
SetLastError(ERROR_NOT_LOCKED);
RetVal = FALSE;
}
else if (!HandleEntry->LockCount)
{
/* Nothing to unlock */
SetLastError(NO_ERROR);
RetVal = FALSE;
}
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
SetLastError(ERROR_INVALID_PARAMETER);
RetVal = FALSE;
}
_SEH2_END;
/* All done. Unlock the heap and return the pointer */
RtlUnlockHeap(BaseHeap);
return RetVal;
}
/* EOF */
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