reactos/posix/lib/psxdll/misc/tls.c

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/* $Id: tls.c,v 1.3 2002/10/29 04:45:35 rex Exp $
*/
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS POSIX+ Subsystem
* FILE: subsys/psx/lib/psxdll/misc/tls.c
* PURPOSE: Thread local storage
* PROGRAMMER: KJK::Hyperion <noog@libero.it>
* UPDATE HISTORY:
* 30/04/2002: Created
*/
#include <ddk/ntddk.h>
#include <ntdll/rtl.h>
#include <psx/tls.h>
#include <psx/errno.h>
__tls_index_t __tls_alloc()
{
ULONG nIndex;
RtlAcquirePebLock();
nIndex = RtlFindClearBitsAndSet(NtCurrentPeb()->TlsBitmap, 1, 0);
if (nIndex == (ULONG)-1)
errno = ENOMEM;
else
NtCurrentTeb()->TlsSlots[nIndex] = 0;
RtlReleasePebLock();
return(nIndex);
}
int __tls_free(__tls_index_t index)
{
if (index >= TLS_MINIMUM_AVAILABLE)
{
errno = ERANGE;
return (-1);
}
RtlAcquirePebLock();
if(RtlAreBitsSet(NtCurrentPeb()->TlsBitmap, index, 1))
{
NtSetInformationThread
(
NtCurrentThread(),
ThreadZeroTlsCell,
&index,
sizeof(DWORD)
);
RtlClearBits(NtCurrentPeb()->TlsBitmap, index, 1);
}
RtlReleasePebLock();
return (0);
}
void * __tls_get_val(__tls_index_t index)
{
if(index >= TLS_MINIMUM_AVAILABLE)
{
errno = ERANGE;
return (0);
}
return (NtCurrentTeb()->TlsSlots[index]);
}
int __tls_put_val(__tls_index_t index, void * data)
{
if(index >= TLS_MINIMUM_AVAILABLE)
{
errno = ERANGE;
return (-1);
}
NtCurrentTeb()->TlsSlots[index] = data;
return (0);
}
/* EOF */