win32/win32thread.c

   1 #include "EXTERN.h"
   2 #include "perl.h"
   3
   4 #if defined(PERL_OBJECT)
   5 #define NO_XSLOCKS
   6 extern CPerlObj* pPerl;
   7 #include "XSUB.h"
   8 #endif
   9
  10 #ifdef USE_DECLSPEC_THREAD
  11 __declspec(thread) struct perl_thread *Perl_current_thread = NULL;
  12 #endif
  13
  14 void
  15 Perl_setTHR(struct perl_thread *t)
  16 {
  17 #ifdef USE_THREADS
  18 #ifdef USE_DECLSPEC_THREAD
  19  Perl_current_thread = t;
  20 #else
  21  TlsSetValue(PL_thr_key,t);
  22 #endif
  23 #endif
  24 }
  25
  26 struct perl_thread *
  27 Perl_getTHR(void)
  28 {
  29 #ifdef USE_THREADS
  30 #ifdef USE_DECLSPEC_THREAD
  31  return Perl_current_thread;
  32 #else
  33  return (struct perl_thread *) TlsGetValue(PL_thr_key);
  34 #endif
  35 #else
  36  return NULL;
  37 #endif
  38 }
  39
  40 void
  41 Perl_alloc_thread_key(void)
  42 {
  43 #ifdef USE_THREADS
  44     static int key_allocated = 0;
  45     if (!key_allocated) {
  46         if ((PL_thr_key = TlsAlloc()) == TLS_OUT_OF_INDEXES)
  47             Perl_croak_nocontext("panic: TlsAlloc");
  48         key_allocated = 1;
  49     }
  50 #endif
  51 }
  52
  53 void
  54 Perl_init_thread_intern(struct perl_thread *athr)
  55 {
  56 #ifdef USE_THREADS
  57 #ifndef USE_DECLSPEC_THREAD
  58
  59  /*
  60   * Initialize port-specific per-thread data in thr->i
  61   * as only things we have there are just static areas for
  62   * return values we don't _need_ to do anything but
  63   * this is good practice:
  64   */
  65  memset(&athr->i,0,sizeof(athr->i));
  66
  67 #endif
  68 #endif
  69 }
  70
  71 void
  72 Perl_set_thread_self(struct perl_thread *thr)
  73 {
  74 #ifdef USE_THREADS
  75     /* Set thr->self.  GetCurrentThread() retrurns a pseudo handle, need
  76        this to convert it into a handle another thread can use.
  77      */
  78     DuplicateHandle(GetCurrentProcess(),
  79                     GetCurrentThread(),
  80                     GetCurrentProcess(),
  81                     &thr->self,
  82                     0,
  83                     FALSE,
  84                     DUPLICATE_SAME_ACCESS);
  85 #endif
  86 }
  87
  88 #ifdef USE_THREADS
  89 int
  90 Perl_thread_create(struct perl_thread *thr, thread_func_t *fn)
  91 {
  92     DWORD junk;
  93     unsigned long th;
  94
  95     DEBUG_S(PerlIO_printf(Perl_debug_log,
  96                           "%p: create OS thread\n", thr));
  97 #ifdef USE_RTL_THREAD_API
  98     /* See comment about USE_RTL_THREAD_API in win32thread.h */
  99 #if defined(__BORLANDC__)
 100     th = _beginthreadNT(fn,                             /* start address */
 101                         0,                              /* stack size */
 102                         (void *)thr,                    /* parameters */
 103                         (void *)NULL,                   /* security attrib */
 104                         0,                              /* creation flags */
 105                         (unsigned long *)&junk);        /* tid */
 106     if (th == (unsigned long)-1)
 107         th = 0;
 108 #elif defined(_MSC_VER_)
 109     th = _beginthreadex((void *)NULL,                   /* security attrib */
 110                         0,                              /* stack size */
 111                         fn,                             /* start address */
 112                         (void*)thr,                     /* parameters */
 113                         0,                              /* creation flags */
 114                         (unsigned *)&junk);             /* tid */
 115 #else /* compilers using CRTDLL.DLL only have _beginthread() */
 116     th = _beginthread(fn,                               /* start address */
 117                       0,                                /* stack size */
 118                       (void*)thr);                      /* parameters */
 119     if (th == (unsigned long)-1)
 120         th = 0;
 121 #endif
 122     thr->self = (HANDLE)th;
 123 #else   /* !USE_RTL_THREAD_API */
 124     thr->self = CreateThread(NULL, 0, fn, (void*)thr, 0, &junk);
 125 #endif  /* !USE_RTL_THREAD_API */
 126     DEBUG_S(PerlIO_printf(Perl_debug_log,
 127                           "%p: OS thread = %p, id=%ld\n", thr, thr->self, junk));
 128     return thr->self ? 0 : -1;
 129 }
 130 #endif
 131