lib/msvcrt/misc/tls.c

   1 /* tls.c */
   2
   3 #include <windows.h>
   4 #include <msvcrt/internal/tls.h>
   5 #include <msvcrt/internal/rterror.h>
   6
   7
   8 static unsigned long TlsIndex = (unsigned long)-1;
   9
  10
  11 static void InitThreadData(PTHREADDATA ThreadData)
  12 {
  13    ThreadData->terrno = 0;
  14    ThreadData->tdoserrno = 0;
  15
  16    ThreadData->fpecode = 0;
  17
  18    /* FIXME: init more thread local data */
  19
  20 }
  21
  22
  23 int CreateThreadData(void)
  24 {
  25    PTHREADDATA ThreadData;
  26
  27    TlsIndex = TlsAlloc();
  28    if (TlsIndex == (unsigned long)-1)
  29      return FALSE;
  30
  31    ThreadData = (PTHREADDATA)calloc(1, sizeof(THREADDATA));
  32    if (ThreadData == NULL)
  33      return FALSE;
  34
  35    if(!TlsSetValue(TlsIndex, (LPVOID)ThreadData))
  36      return FALSE;
  37
  38    InitThreadData(ThreadData);
  39
  40    return TRUE;
  41 }
  42
  43
  44 void DestroyThreadData(void)
  45 {
  46    if (TlsIndex != (unsigned long)-1)
  47      {
  48         TlsFree(TlsIndex);
  49         TlsIndex = (unsigned long)-1;
  50      }
  51 }
  52
  53
  54 void FreeThreadData(PTHREADDATA ThreadData)
  55 {
  56    if (TlsIndex != (unsigned long)-1)
  57      {
  58         if (ThreadData == NULL)
  59            ThreadData = TlsGetValue(TlsIndex);
  60
  61         if (ThreadData != NULL)
  62           {
  63              /* FIXME: free more thread local data */
  64
  65              free(ThreadData);
  66           }
  67
  68         TlsSetValue(TlsIndex, NULL);
  69      }
  70 }
  71
  72
  73 PTHREADDATA GetThreadData(void)
  74 {
  75    PTHREADDATA ThreadData;
  76    DWORD LastError;
  77
  78    LastError = GetLastError();
  79    ThreadData = TlsGetValue(TlsIndex);
  80    if (ThreadData == NULL)
  81      {
  82         ThreadData = (PTHREADDATA)calloc(1, sizeof(THREADDATA));
  83         if (ThreadData != NULL)
  84           {
  85              TlsSetValue(TlsIndex, (LPVOID)ThreadData);
  86
  87              InitThreadData(ThreadData);
  88           }
  89         else
  90           {
  91             _amsg_exit(_RT_THREAD); /* write message and die */
  92           }
  93      }
  94
  95    SetLastError(LastError);
  96
  97    return ThreadData;
  98 }
  99
 100 /* EOF */
 101