Sweden-Number/memory/heap.c

263 lines
7.3 KiB
C

/*
* Win32 heap functions
*
* Copyright 1996 Alexandre Julliard
* Copyright 1998 Ulrich Weigand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "winbase.h"
#include "winerror.h"
#include "winnt.h"
#include "winternl.h"
#include "wine/unicode.h"
#include "thread.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(heap);
/* address where we try to map the system heap */
#define SYSTEM_HEAP_BASE ((void*)0x65430000)
#define SYSTEM_HEAP_SIZE 0x100000 /* Default heap size = 1Mb */
static HANDLE systemHeap; /* globally shared heap */
/***********************************************************************
* HEAP_CreateSystemHeap
*
* Create the system heap.
*/
inline static HANDLE HEAP_CreateSystemHeap(void)
{
int created;
void *base;
HANDLE map, event;
UNICODE_STRING event_name;
OBJECT_ATTRIBUTES event_attr;
if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
0, SYSTEM_HEAP_SIZE, "__SystemHeap" ))) return 0;
created = (GetLastError() != ERROR_ALREADY_EXISTS);
if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
{
/* pre-defined address not available */
ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
return 0;
}
/* create the system heap event */
RtlCreateUnicodeStringFromAsciiz( &event_name, "__SystemHeapEvent" );
event_attr.Length = sizeof(event_attr);
event_attr.RootDirectory = 0;
event_attr.ObjectName = &event_name;
event_attr.Attributes = 0;
event_attr.SecurityDescriptor = NULL;
event_attr.SecurityQualityOfService = NULL;
NtCreateEvent( &event, EVENT_ALL_ACCESS, &event_attr, TRUE, FALSE );
if (created) /* newly created heap */
{
systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
SYSTEM_HEAP_SIZE, NULL, NULL );
NtSetEvent( event, NULL );
}
else
{
/* wait for the heap to be initialized */
WaitForSingleObject( event, INFINITE );
systemHeap = (HANDLE)base;
}
CloseHandle( map );
return systemHeap;
}
/***********************************************************************
* HeapCreate (KERNEL32.@)
* RETURNS
* Handle of heap: Success
* NULL: Failure
*/
HANDLE WINAPI HeapCreate(
DWORD flags, /* [in] Heap allocation flag */
SIZE_T initialSize, /* [in] Initial heap size */
SIZE_T maxSize /* [in] Maximum heap size */
) {
HANDLE ret;
if ( flags & HEAP_SHARED )
{
if (!systemHeap) HEAP_CreateSystemHeap();
else WARN( "Shared Heap requested, returning system heap.\n" );
ret = systemHeap;
}
else
{
ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
}
return ret;
}
/***********************************************************************
* HeapDestroy (KERNEL32.@)
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
{
if (heap == systemHeap)
{
WARN( "attempt to destroy system heap, returning TRUE!\n" );
return TRUE;
}
if (!RtlDestroyHeap( heap )) return TRUE;
SetLastError( ERROR_INVALID_HANDLE );
return FALSE;
}
/***********************************************************************
* HeapCompact (KERNEL32.@)
*/
SIZE_T WINAPI HeapCompact( HANDLE heap, DWORD flags )
{
return RtlCompactHeap( heap, flags );
}
/***********************************************************************
* HeapLock (KERNEL32.@)
* Attempts to acquire the critical section object for a specified heap.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapLock(
HANDLE heap /* [in] Handle of heap to lock for exclusive access */
) {
return RtlLockHeap( heap );
}
/***********************************************************************
* HeapUnlock (KERNEL32.@)
* Releases ownership of the critical section object.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapUnlock(
HANDLE heap /* [in] Handle to the heap to unlock */
) {
return RtlUnlockHeap( heap );
}
/***********************************************************************
* HeapValidate (KERNEL32.@)
* Validates a specified heap.
*
* NOTES
* Flags is ignored.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapValidate(
HANDLE heap, /* [in] Handle to the heap */
DWORD flags, /* [in] Bit flags that control access during operation */
LPCVOID block /* [in] Optional pointer to memory block to validate */
) {
return RtlValidateHeap( heap, flags, block );
}
/***********************************************************************
* HeapWalk (KERNEL32.@)
* Enumerates the memory blocks in a specified heap.
*
* TODO
* - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
* PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapWalk(
HANDLE heap, /* [in] Handle to heap to enumerate */
LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
) {
NTSTATUS ret = RtlWalkHeap( heap, entry );
if (ret) SetLastError( RtlNtStatusToDosError(ret) );
return !ret;
}
/***********************************************************************
* GetProcessHeap (KERNEL32.@)
*/
HANDLE WINAPI GetProcessHeap(void)
{
return NtCurrentTeb()->Peb->ProcessHeap;
}
/***********************************************************************
* GetProcessHeaps (KERNEL32.@)
*/
DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
{
return RtlGetProcessHeaps( count, heaps );
}
/* FIXME: these functions are needed for dlls that aren't properly separated yet */
LPVOID WINAPI HeapAlloc( HANDLE heap, DWORD flags, SIZE_T size )
{
return RtlAllocateHeap( heap, flags, size );
}
BOOL WINAPI HeapFree( HANDLE heap, DWORD flags, LPVOID ptr )
{
return RtlFreeHeap( heap, flags, ptr );
}
LPVOID WINAPI HeapReAlloc( HANDLE heap, DWORD flags, LPVOID ptr, SIZE_T size )
{
return RtlReAllocateHeap( heap, flags, ptr, size );
}
SIZE_T WINAPI HeapSize( HANDLE heap, DWORD flags, LPVOID ptr )
{
return RtlSizeHeap( heap, flags, ptr );
}