source: trunk/third/perl/win32/win32thread.c @ 14545

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

#if defined(PERL_OBJECT)
#define NO_XSLOCKS
extern CPerlObj* pPerl;
#include "XSUB.h"
#endif

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

void
Perl_set_context(void *t)
{
#if defined(USE_THREADS) || 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_THREADS) || 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_THREADS
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