reactos/lib/crt/misc/tls.c

   1 #include <precomp.h>
   2 #include <stdlib.h>
   3 #include <internal/tls.h>
   4 #include <internal/rterror.h>
   5
   6
   7 static unsigned long TlsIndex = (unsigned long)-1;
   8
   9
  10 static void InitThreadData(PTHREADDATA ThreadData)
  11 {
  12    ThreadData->terrno = 0;
  13    ThreadData->tdoserrno = 0;
  14
  15    ThreadData->fpecode = 0;
  16
  17    /* FIXME: init more thread local data */
  18
  19 }
  20
  21
  22 int CreateThreadData(void)
  23 {
  24    PTHREADDATA ThreadData;
  25
  26    TlsIndex = TlsAlloc();
  27    if (TlsIndex == (unsigned long)-1)
  28      return FALSE;
  29
  30    ThreadData = (PTHREADDATA)calloc(1, sizeof(THREADDATA));
  31    if (ThreadData == NULL)
  32      return FALSE;
  33
  34    if(!TlsSetValue(TlsIndex, (LPVOID)ThreadData))
  35      return FALSE;
  36
  37    InitThreadData(ThreadData);
  38
  39    return TRUE;
  40 }
  41
  42
  43 void DestroyThreadData(void)
  44 {
  45    if (TlsIndex != (unsigned long)-1)
  46      {
  47         TlsFree(TlsIndex);
  48         TlsIndex = (unsigned long)-1;
  49      }
  50 }
  51
  52
  53 void FreeThreadData(PTHREADDATA ThreadData)
  54 {
  55    if (TlsIndex != (unsigned long)-1)
  56      {
  57         if (ThreadData == NULL)
  58            ThreadData = TlsGetValue(TlsIndex);
  59
  60         if (ThreadData != NULL)
  61           {
  62              /* FIXME: free more thread local data */
  63
  64              free(ThreadData);
  65           }
  66
  67         TlsSetValue(TlsIndex, NULL);
  68      }
  69 }
  70
  71
  72 PTHREADDATA GetThreadData(void)
  73 {
  74    PTHREADDATA ThreadData;
  75    DWORD LastError;
  76
  77    LastError = GetLastError();
  78    ThreadData = TlsGetValue(TlsIndex);
  79    if (ThreadData == NULL)
  80      {
  81         ThreadData = (PTHREADDATA)calloc(1, sizeof(THREADDATA));
  82         if (ThreadData != NULL)
  83           {
  84              TlsSetValue(TlsIndex, (LPVOID)ThreadData);
  85
  86              InitThreadData(ThreadData);
  87           }
  88         else
  89           {
  90             _amsg_exit(_RT_THREAD); /* write message and die */
  91           }
  92      }
  93
  94    SetLastError(LastError);
  95
  96    return ThreadData;
  97 }
  98
  99 /* EOF */
 100