/* Time-stamp: <01/08/01 21:00:29 keuchel@w2k> */

#include "EXTERN.h"
#include "perl.h"

#ifdef USE_DECLSPEC_THREAD
__declspec(thread) void *PL_current_context = NULL;
#endif

void
Perl_set_context(void *t)
{
#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
#  ifdef USE_DECLSPEC_THREAD
    Perl_current_context = t;
#  else
    DWORD err = GetLastError();
    TlsSetValue(PL_thr_key,t);
    SetLastError(err);
#  endif
#endif
}

void *
Perl_get_context(void)
{
#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
#  ifdef USE_DECLSPEC_THREAD
    return Perl_current_context;
#  else
    DWORD err = GetLastError();
    void *result = TlsGetValue(PL_thr_key);
    SetLastError(err);
    return result;
#  endif
#else
    return NULL;
#endif
}

#ifdef USE_5005THREADS
void
Perl_init_thread_intern(struct perl_thread *athr)
{
#ifndef USE_DECLSPEC_THREAD

 /* 
  * Initialize port-specific per-thread data in thr->i
  * as only things we have there are just static areas for
  * return values we don't _need_ to do anything but 
  * this is good practice:
  */
 memset(&athr->i,0,sizeof(athr->i));

#endif
}

void
Perl_set_thread_self(struct perl_thread *thr)
{
    /* Set thr->self.  GetCurrentThread() retrurns a pseudo handle, need
       this to convert it into a handle another thread can use.
     */
    DuplicateHandle(GetCurrentProcess(),
		    GetCurrentThread(),
		    GetCurrentProcess(),
		    &thr->self,
		    0,
		    FALSE,
		    DUPLICATE_SAME_ACCESS);
}

int
Perl_thread_create(struct perl_thread *thr, thread_func_t *fn)
{
    DWORD junk;
    unsigned long th;

    DEBUG_S(PerlIO_printf(Perl_debug_log,
			  "%p: create OS thread\n", thr));
#ifdef USE_RTL_THREAD_API
    /* See comment about USE_RTL_THREAD_API in win32thread.h */
#if defined(__BORLANDC__)
    th = _beginthreadNT(fn,				/* start address */
			0,				/* stack size */
			(void *)thr,			/* parameters */
			(void *)NULL,			/* security attrib */
			0,				/* creation flags */
			(unsigned long *)&junk);	/* tid */
    if (th == (unsigned long)-1)
	th = 0;
#elif defined(_MSC_VER_)
    th = _beginthreadex((void *)NULL,			/* security attrib */
			0,				/* stack size */
			fn,				/* start address */
			(void*)thr,			/* parameters */
			0,				/* creation flags */
			(unsigned *)&junk);		/* tid */
#else /* compilers using CRTDLL.DLL only have _beginthread() */
    th = _beginthread(fn,				/* start address */
		      0,				/* stack size */
		      (void*)thr);			/* parameters */
    if (th == (unsigned long)-1)
	th = 0;
#endif
    thr->self = (HANDLE)th;
#else	/* !USE_RTL_THREAD_API */
    thr->self = CreateThread(NULL, 0, fn, (void*)thr, 0, &junk);
#endif	/* !USE_RTL_THREAD_API */
    DEBUG_S(PerlIO_printf(Perl_debug_log,
			  "%p: OS thread = %p, id=%ld\n", thr, thr->self, junk));
    return thr->self ? 0 : -1;
}
#endif