173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/**
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* WinPR: Windows Portable Runtime
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* Handle Management
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*
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* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <winpr/crt.h>
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#include <winpr/handle.h>
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#ifndef _WIN32
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typedef struct _HANDLE_TABLE_ENTRY
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{
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ULONG Type;
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PVOID Object;
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} HANDLE_TABLE_ENTRY, *PHANDLE_TABLE_ENTRY;
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typedef struct _HANDLE_TABLE
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{
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LONG Count;
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LONG MaxCount;
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PHANDLE_TABLE_ENTRY Entries;
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} HANDLE_TABLE, *PHANDLE_TABLE;
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static HANDLE_TABLE HandleTable = { 0, 0, NULL };
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#define HandleTable_GetInstance() \
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if (HandleTable.MaxCount < 1) \
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winpr_HandleTable_New()
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void winpr_HandleTable_New()
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{
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size_t size;
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HandleTable.Count = 0;
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HandleTable.MaxCount = 64;
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size = sizeof(HANDLE_TABLE_ENTRY) * HandleTable.MaxCount;
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HandleTable.Entries = (PHANDLE_TABLE_ENTRY) malloc(size);
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ZeroMemory(HandleTable.Entries, size);
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}
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void winpr_HandleTable_Grow()
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{
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size_t size;
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HandleTable.MaxCount *= 2;
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size = sizeof(HANDLE_TABLE_ENTRY) * HandleTable.MaxCount;
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HandleTable.Entries = (PHANDLE_TABLE_ENTRY) realloc(HandleTable.Entries, size);
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ZeroMemory((void*) &HandleTable.Entries[HandleTable.MaxCount / 2], size / 2);
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}
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void winpr_HandleTable_Free()
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{
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HandleTable.Count = 0;
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HandleTable.MaxCount = 0;
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free(HandleTable.Entries);
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HandleTable.Entries = NULL;
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}
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HANDLE winpr_Handle_Insert(ULONG Type, PVOID Object)
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{
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int index;
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HandleTable_GetInstance();
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for (index = 0; index < (int) HandleTable.MaxCount; index++)
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{
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if (HandleTable.Entries[index].Object == NULL)
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{
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HandleTable.Count++;
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HandleTable.Entries[index].Type = Type;
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HandleTable.Entries[index].Object = Object;
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return Object;
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}
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}
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/* no available entry was found, the table needs to be grown */
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winpr_HandleTable_Grow();
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/* the next call should now succeed */
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return winpr_Handle_Insert(Type, Object);
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}
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BOOL winpr_Handle_Remove(HANDLE handle)
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{
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int index;
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HandleTable_GetInstance();
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for (index = 0; index < (int) HandleTable.MaxCount; index++)
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{
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if (HandleTable.Entries[index].Object == handle)
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{
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HandleTable.Entries[index].Type = HANDLE_TYPE_NONE;
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HandleTable.Entries[index].Object = NULL;
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HandleTable.Count--;
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return TRUE;
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}
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}
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return FALSE;
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}
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ULONG winpr_Handle_GetType(HANDLE handle)
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{
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int index;
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HandleTable_GetInstance();
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for (index = 0; index < (int) HandleTable.MaxCount; index++)
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{
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if (HandleTable.Entries[index].Object == handle)
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return HandleTable.Entries[index].Type;
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}
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return HANDLE_TYPE_NONE;
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}
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PVOID winpr_Handle_GetObject(HANDLE handle)
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{
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HandleTable_GetInstance();
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return handle;
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}
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BOOL winpr_Handle_GetInfo(HANDLE handle, ULONG* pType, PVOID* pObject)
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{
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int index;
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HandleTable_GetInstance();
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for (index = 0; index < (int) HandleTable.MaxCount; index++)
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{
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if (HandleTable.Entries[index].Object == handle)
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{
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*pType = HandleTable.Entries[index].Type;
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*pObject = HandleTable.Entries[index].Object;
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return TRUE;
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}
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}
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return FALSE;
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}
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#endif
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