lib/kernel32/thread/fls.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:  See COPYING in the top level directory
   4  * PROJECT:    ReactOS system libraries
   5  * FILE:       lib/kernel32/thread/fls.c
   6  * PURPOSE:    Fiber local storage functions
   7  * PROGRAMMER: KJK::Hyperion <noog@libero.it>
   8  *
   9  * UPDATE HISTORY:
  10  *             28/05/2003 - created. Stubs only
  11  *
  12  */
  13
  14 #include <k32.h>
  15
  16 #include <kernel32/kernel32.h>
  17
  18 /*
  19  * @unimplemented
  20  */
  21 DWORD WINAPI FlsAlloc(PFLS_CALLBACK_FUNCTION lpCallback)
  22 {
  23  (void)lpCallback;
  24
  25  UNIMPLEMENTED;
  26  SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
  27  return FLS_OUT_OF_INDEXES;
  28 }
  29
  30
  31 /*
  32  * @unimplemented
  33  */
  34 BOOL WINAPI FlsFree(DWORD dwFlsIndex)
  35 {
  36  (void)dwFlsIndex;
  37
  38  UNIMPLEMENTED;
  39  SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
  40  return FALSE;
  41 }
  42
  43
  44 /*
  45  * @implemented
  46  */
  47 PVOID WINAPI FlsGetValue(DWORD dwFlsIndex)
  48 {
  49  PVOID * ppFlsSlots;
  50  PVOID pRetVal;
  51
  52  if(dwFlsIndex >= 128) goto l_InvalidParam;
  53
  54  ppFlsSlots = NtCurrentTeb()->FlsSlots;
  55
  56  if(ppFlsSlots == NULL) goto l_InvalidParam;
  57
  58  SetLastError(0);
  59  pRetVal = ppFlsSlots[dwFlsIndex + 2];
  60
  61  return pRetVal;
  62
  63 l_InvalidParam:
  64  SetLastError(ERROR_INVALID_PARAMETER);
  65  return NULL;
  66 }
  67
  68
  69 /*
  70  * @implemented
  71  */
  72 BOOL WINAPI FlsSetValue(DWORD dwFlsIndex, PVOID lpFlsData)
  73 {
  74  PVOID * ppFlsSlots;
  75  TEB * pTeb = NtCurrentTeb();
  76
  77  if(dwFlsIndex >= 128) goto l_InvalidParam;
  78
  79  ppFlsSlots = pTeb->FlsSlots;
  80
  81  if(ppFlsSlots == NULL)
  82  {
  83   PEB * pPeb = pTeb->Peb;
  84
  85   ppFlsSlots = RtlAllocateHeap
  86   (
  87    pPeb->ProcessHeap,
  88    HEAP_ZERO_MEMORY,
  89    (128 + 2) * sizeof(PVOID)
  90   );
  91
  92   if(ppFlsSlots == NULL) goto l_OutOfMemory;
  93
  94   pTeb->FlsSlots = ppFlsSlots;
  95
  96   RtlAcquirePebLock();
  97
  98   /* TODO: initialization */
  99
 100   RtlReleasePebLock();
 101  }
 102
 103  ppFlsSlots[dwFlsIndex + 2] = lpFlsData;
 104
 105  return TRUE;
 106
 107 l_OutOfMemory:
 108  SetLastError(ERROR_NOT_ENOUGH_MEMORY);
 109  goto l_Fail;
 110
 111 l_InvalidParam:
 112  SetLastError(ERROR_INVALID_PARAMETER);
 113
 114 l_Fail:
 115  return FALSE;
 116 }
 117
 118 /* EOF */