[fpc-devel] threadvar implementation

Michael Schnell mschnell at lumino.de
Mon Jul 26 13:43:34 CEST 2010

  M$ C on Win32 (X86/32), using Visual Studio.

declspec(thread) int ithread;

   ithread = 1;

results in

  mov eax, dword ptr [__tls_index (417328h) ]
  mov ecx, dword ptr fs:[2Ch]
  mov edx, dword ptr [ecx,+eax*4]
  mov dword pth[edx+104h],1

This is essentially the same code as with Delphi. Supposedly as with 
Delphi [__tls_index (417328h) ] is always 0 with normal applications. 
(no idea what this is useful for)


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