lib/msvcrt/misc/tls.c

   1 /* tls.c */
   2
   3 #include <windows.h>
   4 #include <msvcrt/stdlib.h>
   5 #include <msvcrt/internal/tls.h>
   6 #include <msvcrt/internal/rterror.h>
   7
   8
   9 static unsigned long TlsIndex = (unsigned long)-1;
  10
  11
  12 static void InitThreadData(PTHREADDATA ThreadData)
  13 {
  14    ThreadData->terrno = 0;
  15    ThreadData->tdoserrno = 0;
  16
  17    ThreadData->fpecode = 0;
  18
  19    /* FIXME: init more thread local data */
  20
  21 }
  22
  23
  24 int CreateThreadData(void)
  25 {
  26    PTHREADDATA ThreadData;
  27
  28    TlsIndex = TlsAlloc();
  29    if (TlsIndex == (unsigned long)-1)
  30      return FALSE;
  31
  32    ThreadData = (PTHREADDATA)calloc(1, sizeof(THREADDATA));
  33    if (ThreadData == NULL)
  34      return FALSE;
  35
  36    if(!TlsSetValue(TlsIndex, (LPVOID)ThreadData))
  37      return FALSE;
  38
  39    InitThreadData(ThreadData);
  40
  41    return TRUE;
  42 }
  43
  44
  45 void DestroyThreadData(void)
  46 {
  47    if (TlsIndex != (unsigned long)-1)
  48      {
  49         TlsFree(TlsIndex);
  50         TlsIndex = (unsigned long)-1;
  51      }
  52 }
  53
  54
  55 void FreeThreadData(PTHREADDATA ThreadData)
  56 {
  57    if (TlsIndex != (unsigned long)-1)
  58      {
  59         if (ThreadData == NULL)
  60            ThreadData = TlsGetValue(TlsIndex);
  61
  62         if (ThreadData != NULL)
  63           {
  64              /* FIXME: free more thread local data */
  65
  66              free(ThreadData);
  67           }
  68
  69         TlsSetValue(TlsIndex, NULL);
  70      }
  71 }
  72
  73
  74 PTHREADDATA GetThreadData(void)
  75 {
  76    PTHREADDATA ThreadData;
  77    DWORD LastError;
  78
  79    LastError = GetLastError();
  80    ThreadData = TlsGetValue(TlsIndex);
  81    if (ThreadData == NULL)
  82      {
  83         ThreadData = (PTHREADDATA)calloc(1, sizeof(THREADDATA));
  84         if (ThreadData != NULL)
  85           {
  86              TlsSetValue(TlsIndex, (LPVOID)ThreadData);
  87
  88              InitThreadData(ThreadData);
  89           }
  90         else
  91           {
  92             _amsg_exit(_RT_THREAD); /* write message and die */
  93           }
  94      }
  95
  96    SetLastError(LastError);
  97
  98    return ThreadData;
  99 }
 100
 101 /* EOF */
 102