1 #include "private/gc_priv.h"
3 #if defined(GC_WIN32_THREADS)
10 /* Cygwin-specific forward decls */
11 # undef pthread_create
12 # undef pthread_sigmask
14 # undef pthread_detach
17 # define DEBUG_CYGWIN_THREADS 0
19 void * GC_start_routine(void * arg
);
20 void GC_thread_exit_proc(void *arg
);
24 /* The type of the first argument to InterlockedExchange. */
25 /* Documented to be LONG volatile *, but at least gcc likes */
30 # define MAX_THREADS 256
32 /* Things may get quite slow for large numbers of threads, */
33 /* since we look them up with sequential search. */
36 GC_bool GC_thr_initialized
= FALSE
;
38 DWORD GC_main_thread
= 0;
40 struct GC_thread_Rep
{
41 LONG in_use
; /* Updated without lock. */
42 /* We assert that unused */
43 /* entries have invalid ids of */
44 /* zero and zero stack fields. */
47 ptr_t stack_base
; /* The cold end of the stack. */
48 /* 0 ==> entry not valid. */
49 /* !in_use ==> stack_base == 0 */
53 void *status
; /* hold exit value until join in case it's a pointer */
55 short flags
; /* Protected by GC lock. */
56 # define FINISHED 1 /* Thread has exited. */
57 # define DETACHED 2 /* Thread is intended to be detached. */
61 typedef volatile struct GC_thread_Rep
* GC_thread
;
64 * We generally assume that volatile ==> memory ordering, at least among
68 volatile GC_bool GC_please_stop
= FALSE
;
70 volatile struct GC_thread_Rep thread_table
[MAX_THREADS
];
72 volatile LONG GC_max_thread_index
= 0; /* Largest index in thread_table */
73 /* that was ever used. */
75 extern LONG WINAPI
GC_write_fault_handler(struct _EXCEPTION_POINTERS
*exc_info
);
78 * This may be called from DllMain, and hence operates under unusual
81 static GC_thread
GC_new_thread(void) {
83 /* It appears to be unsafe to acquire a lock here, since this */
84 /* code is apparently not preeemptible on some systems. */
85 /* (This is based on complaints, not on Microsoft's official */
86 /* documentation, which says this should perform "only simple */
87 /* initialization tasks".) */
88 /* Hence we make do with nonblocking synchronization. */
90 /* The following should be a noop according to the win32 */
91 /* documentation. There is empirical evidence that it */
93 # if defined(MPROTECT_VDB)
94 if (GC_incremental
) SetUnhandledExceptionFilter(GC_write_fault_handler
);
96 /* cast away volatile qualifier */
97 for (i
= 0; InterlockedExchange((IE_t
)&thread_table
[i
].in_use
,1) != 0; i
++) {
98 /* Compare-and-swap would make this cleaner, but that's not */
99 /* supported before Windows 98 and NT 4.0. In Windows 2000, */
100 /* InterlockedExchange is supposed to be replaced by */
101 /* InterlockedExchangePointer, but that's not really what I */
103 if (i
== MAX_THREADS
- 1)
104 ABORT("too many threads");
106 /* Update GC_max_thread_index if necessary. The following is safe, */
107 /* and unlike CompareExchange-based solutions seems to work on all */
108 /* Windows95 and later platforms. */
109 /* Unfortunately, GC_max_thread_index may be temporarily out of */
110 /* bounds, so readers have to compensate. */
111 while (i
> GC_max_thread_index
) {
112 InterlockedIncrement((IE_t
)&GC_max_thread_index
);
114 if (GC_max_thread_index
>= MAX_THREADS
) {
115 /* We overshot due to simultaneous increments. */
116 /* Setting it to MAX_THREADS-1 is always safe. */
117 GC_max_thread_index
= MAX_THREADS
- 1;
121 thread_table
[i
].pthread_id
= pthread_self();
123 if (!DuplicateHandle(GetCurrentProcess(),
126 (HANDLE
*)&thread_table
[i
].handle
,
129 DUPLICATE_SAME_ACCESS
)) {
130 DWORD last_error
= GetLastError();
131 GC_printf1("Last error code: %lx\n", last_error
);
132 ABORT("DuplicateHandle failed");
134 thread_table
[i
].stack_base
= GC_get_stack_base();
135 /* Up until this point, GC_push_all_stacks considers this thread */
137 if (thread_table
[i
].stack_base
== NULL
)
138 ABORT("Failed to find stack base in GC_new_thread");
139 /* Up until this point, this entry is viewed as reserved but invalid */
140 /* by GC_delete_thread. */
141 thread_table
[i
].id
= GetCurrentThreadId();
142 /* If this thread is being created while we are trying to stop */
143 /* the world, wait here. Hopefully this can't happen on any */
144 /* systems that don't allow us to block here. */
145 while (GC_please_stop
) Sleep(20);
146 return thread_table
+ i
;
150 * GC_max_thread_index may temporarily be larger than MAX_THREADS.
151 * To avoid subscript errors, we check on access.
156 LONG
GC_get_max_thread_index()
158 LONG my_max
= GC_max_thread_index
;
160 if (my_max
>= MAX_THREADS
) return MAX_THREADS
-1;
164 /* This is intended to be lock-free, though that */
165 /* assumes that the CloseHandle becomes visible before the */
166 /* in_use assignment. */
167 static void GC_delete_gc_thread(GC_thread thr
)
169 CloseHandle(thr
->handle
);
170 /* cast away volatile qualifier */
175 # endif /* CYGWIN32 */
179 static void GC_delete_thread(DWORD thread_id
) {
181 LONG my_max
= GC_get_max_thread_index();
185 (!thread_table
[i
].in_use
|| thread_table
[i
].id
!= thread_id
);
186 /* Must still be in_use, since nobody else can store our thread_id. */
189 WARN("Removing nonexistent thread %ld\n", (GC_word
)thread_id
);
191 GC_delete_gc_thread(thread_table
+i
);
198 /* Return a GC_thread corresponding to a given pthread_t. */
199 /* Returns 0 if it's not there. */
200 /* We assume that this is only called for pthread ids that */
201 /* have not yet terminated or are still joinable. */
202 static GC_thread
GC_lookup_thread(pthread_t id
)
205 LONG my_max
= GC_get_max_thread_index();
209 (!thread_table
[i
].in_use
|| thread_table
[i
].pthread_id
!= id
210 || !thread_table
[i
].in_use
);
211 /* Must still be in_use, since nobody else can store our thread_id. */
213 if (i
> my_max
) return 0;
214 return thread_table
+ i
;
217 #endif /* CYGWIN32 */
219 void GC_push_thread_structures
GC_PROTO((void))
221 /* Unlike the other threads implementations, the thread table here */
222 /* contains no pointers to the collectable heap. Thus we have */
223 /* no private structures we need to preserve. */
225 { int i
; /* pthreads may keep a pointer in the thread exit value */
226 LONG my_max
= GC_get_max_thread_index();
228 for (i
= 0; i
<= my_max
; i
++)
229 if (thread_table
[i
].in_use
)
230 GC_push_all((ptr_t
)&(thread_table
[i
].status
),
231 (ptr_t
)(&(thread_table
[i
].status
)+1));
236 /* Defined in misc.c */
237 extern CRITICAL_SECTION GC_write_cs
;
241 DWORD thread_id
= GetCurrentThreadId();
244 if (!GC_thr_initialized
) ABORT("GC_stop_world() called before GC_thr_init()");
246 GC_please_stop
= TRUE
;
248 EnterCriticalSection(&GC_write_cs
);
249 # endif /* !CYGWIN32 */
250 for (i
= 0; i
<= GC_get_max_thread_index(); i
++)
251 if (thread_table
[i
].stack_base
!= 0
252 && thread_table
[i
].id
!= thread_id
) {
254 /* SuspendThread will fail if thread is running kernel code */
255 while (SuspendThread(thread_table
[i
].handle
) == (DWORD
)-1)
258 /* Apparently the Windows 95 GetOpenFileName call creates */
259 /* a thread that does not properly get cleaned up, and */
260 /* SuspendThread on its descriptor may provoke a crash. */
261 /* This reduces the probability of that event, though it still */
262 /* appears there's a race here. */
264 if (GetExitCodeThread(thread_table
[i
].handle
,&exitCode
) &&
265 exitCode
!= STILL_ACTIVE
) {
266 thread_table
[i
].stack_base
= 0; /* prevent stack from being pushed */
268 /* this breaks pthread_join on Cygwin, which is guaranteed to */
269 /* only see user pthreads */
270 thread_table
[i
].in_use
= FALSE
;
271 CloseHandle(thread_table
[i
].handle
);
275 if (SuspendThread(thread_table
[i
].handle
) == (DWORD
)-1)
276 ABORT("SuspendThread failed");
278 thread_table
[i
].suspended
= TRUE
;
281 LeaveCriticalSection(&GC_write_cs
);
282 # endif /* !CYGWIN32 */
285 void GC_start_world()
287 DWORD thread_id
= GetCurrentThreadId();
289 LONG my_max
= GC_get_max_thread_index();
291 for (i
= 0; i
<= my_max
; i
++)
292 if (thread_table
[i
].stack_base
!= 0 && thread_table
[i
].suspended
293 && thread_table
[i
].id
!= thread_id
) {
294 if (ResumeThread(thread_table
[i
].handle
) == (DWORD
)-1)
295 ABORT("ResumeThread failed");
296 thread_table
[i
].suspended
= FALSE
;
298 GC_please_stop
= FALSE
;
302 # pragma warning(disable:4715)
304 ptr_t
GC_current_stackbottom()
306 DWORD thread_id
= GetCurrentThreadId();
308 LONG my_max
= GC_get_max_thread_index();
310 for (i
= 0; i
<= my_max
; i
++)
311 if (thread_table
[i
].stack_base
&& thread_table
[i
].id
== thread_id
)
312 return thread_table
[i
].stack_base
;
313 ABORT("no thread table entry for current thread");
316 # pragma warning(default:4715)
320 /* The VirtualQuery calls below won't work properly on WinCE, but */
321 /* since each stack is restricted to an aligned 64K region of */
322 /* virtual memory we can just take the next lowest multiple of 64K. */
323 # define GC_get_stack_min(s) \
324 ((ptr_t)(((DWORD)(s) - 1) & 0xFFFF0000))
326 static ptr_t
GC_get_stack_min(ptr_t s
)
329 MEMORY_BASIC_INFORMATION info
;
330 VirtualQuery(s
, &info
, sizeof(info
));
332 bottom
= info
.BaseAddress
;
333 VirtualQuery(bottom
- 1, &info
, sizeof(info
));
334 } while ((info
.Protect
& PAGE_READWRITE
)
335 && !(info
.Protect
& PAGE_GUARD
));
340 void GC_push_all_stacks()
342 DWORD thread_id
= GetCurrentThreadId();
343 GC_bool found_me
= FALSE
;
348 LONG my_max
= GC_get_max_thread_index();
350 for (i
= 0; i
<= my_max
; i
++) {
351 thread
= thread_table
+ i
;
352 if (thread
-> in_use
&& thread
-> stack_base
) {
353 if (thread
-> id
== thread_id
) {
358 context
.ContextFlags
= CONTEXT_INTEGER
|CONTEXT_CONTROL
;
359 if (!GetThreadContext(thread_table
[i
].handle
, &context
))
360 ABORT("GetThreadContext failed");
362 /* Push all registers that might point into the heap. Frame */
363 /* pointer registers are included in case client code was */
364 /* compiled with the 'omit frame pointer' optimisation. */
365 # define PUSH1(reg) GC_push_one((word)context.reg)
366 # define PUSH2(r1,r2) PUSH1(r1), PUSH1(r2)
367 # define PUSH4(r1,r2,r3,r4) PUSH2(r1,r2), PUSH2(r3,r4)
368 # if defined(__x86_64__)
369 PUSH4(Rdi
,Rsi
,Rbx
,Rdx
), PUSH2(Rcx
,Rax
), PUSH1(Rbp
);
370 PUSH4(R8
,R9
,R10
,R11
), PUSH4(R12
,R13
,R14
,R15
);
371 sp
= (ptr_t
)context
.Rsp
;
373 PUSH4(Edi
,Esi
,Ebx
,Edx
), PUSH2(Ecx
,Eax
), PUSH1(Ebp
);
374 sp
= (ptr_t
)context
.Esp
;
375 # elif defined(ARM32)
376 PUSH4(R0
,R1
,R2
,R3
),PUSH4(R4
,R5
,R6
,R7
),PUSH4(R8
,R9
,R10
,R11
),PUSH1(R12
);
377 sp
= (ptr_t
)context
.Sp
;
379 PUSH4(R0
,R1
,R2
,R3
), PUSH4(R4
,R5
,R6
,R7
), PUSH4(R8
,R9
,R10
,R11
);
380 PUSH2(R12
,R13
), PUSH1(R14
);
381 sp
= (ptr_t
)context
.R15
;
383 PUSH4(IntAt
,IntV0
,IntV1
,IntA0
), PUSH4(IntA1
,IntA2
,IntA3
,IntT0
);
384 PUSH4(IntT1
,IntT2
,IntT3
,IntT4
), PUSH4(IntT5
,IntT6
,IntT7
,IntS0
);
385 PUSH4(IntS1
,IntS2
,IntS3
,IntS4
), PUSH4(IntS5
,IntS6
,IntS7
,IntT8
);
386 PUSH4(IntT9
,IntK0
,IntK1
,IntS8
);
387 sp
= (ptr_t
)context
.IntSp
;
389 PUSH4(Gpr0
, Gpr3
, Gpr4
, Gpr5
), PUSH4(Gpr6
, Gpr7
, Gpr8
, Gpr9
);
390 PUSH4(Gpr10
,Gpr11
,Gpr12
,Gpr14
), PUSH4(Gpr15
,Gpr16
,Gpr17
,Gpr18
);
391 PUSH4(Gpr19
,Gpr20
,Gpr21
,Gpr22
), PUSH4(Gpr23
,Gpr24
,Gpr25
,Gpr26
);
392 PUSH4(Gpr27
,Gpr28
,Gpr29
,Gpr30
), PUSH1(Gpr31
);
393 sp
= (ptr_t
)context
.Gpr1
;
394 # elif defined(ALPHA)
395 PUSH4(IntV0
,IntT0
,IntT1
,IntT2
), PUSH4(IntT3
,IntT4
,IntT5
,IntT6
);
396 PUSH4(IntT7
,IntS0
,IntS1
,IntS2
), PUSH4(IntS3
,IntS4
,IntS5
,IntFp
);
397 PUSH4(IntA0
,IntA1
,IntA2
,IntA3
), PUSH4(IntA4
,IntA5
,IntT8
,IntT9
);
398 PUSH4(IntT10
,IntT11
,IntT12
,IntAt
);
399 sp
= (ptr_t
)context
.IntSp
;
401 # error "architecture is not supported"
405 stack_min
= GC_get_stack_min(thread
->stack_base
);
407 if (sp
>= stack_min
&& sp
< thread
->stack_base
)
408 GC_push_all_stack(sp
, thread
->stack_base
);
410 WARN("Thread stack pointer 0x%lx out of range, pushing everything\n",
412 GC_push_all_stack(stack_min
, thread
->stack_base
);
416 if (!found_me
) ABORT("Collecting from unknown thread.");
419 void GC_get_next_stack(char *start
, char **lo
, char **hi
)
422 # define ADDR_LIMIT (char *)(-1L)
423 char * current_min
= ADDR_LIMIT
;
424 LONG my_max
= GC_get_max_thread_index();
426 for (i
= 0; i
<= my_max
; i
++) {
427 char * s
= (char *)thread_table
[i
].stack_base
;
429 if (0 != s
&& s
> start
&& s
< current_min
) {
434 if (current_min
== ADDR_LIMIT
) {
438 *lo
= GC_get_stack_min(current_min
);
439 if (*lo
< start
) *lo
= start
;
442 #if !defined(CYGWIN32)
444 #if !defined(MSWINCE) && defined(GC_DLL)
446 /* We register threads from DllMain */
448 GC_API HANDLE WINAPI
GC_CreateThread(
449 LPSECURITY_ATTRIBUTES lpThreadAttributes
,
450 DWORD dwStackSize
, LPTHREAD_START_ROUTINE lpStartAddress
,
451 LPVOID lpParameter
, DWORD dwCreationFlags
, LPDWORD lpThreadId
)
453 return CreateThread(lpThreadAttributes
, dwStackSize
, lpStartAddress
,
454 lpParameter
, dwCreationFlags
, lpThreadId
);
457 #else /* defined(MSWINCE) || !defined(GC_DLL)) */
459 /* We have no DllMain to take care of new threads. Thus we */
460 /* must properly intercept thread creation. */
463 LPTHREAD_START_ROUTINE start
;
467 static DWORD WINAPI
thread_start(LPVOID arg
);
469 GC_API HANDLE WINAPI
GC_CreateThread(
470 LPSECURITY_ATTRIBUTES lpThreadAttributes
,
471 DWORD dwStackSize
, LPTHREAD_START_ROUTINE lpStartAddress
,
472 LPVOID lpParameter
, DWORD dwCreationFlags
, LPDWORD lpThreadId
)
474 HANDLE thread_h
= NULL
;
478 if (!GC_is_initialized
) GC_init();
479 /* make sure GC is initialized (i.e. main thread is attached) */
481 args
= GC_malloc_uncollectable(sizeof(thread_args
));
482 /* Handed off to and deallocated by child thread. */
484 SetLastError(ERROR_NOT_ENOUGH_MEMORY
);
488 /* set up thread arguments */
489 args
-> start
= lpStartAddress
;
490 args
-> param
= lpParameter
;
492 thread_h
= CreateThread(lpThreadAttributes
,
493 dwStackSize
, thread_start
,
494 args
, dwCreationFlags
,
500 static DWORD WINAPI
thread_start(LPVOID arg
)
503 thread_args
*args
= (thread_args
*)arg
;
507 /* Clear the thread entry even if we exit with an exception. */
508 /* This is probably pointless, since an uncaught exception is */
509 /* supposed to result in the process being killed. */
512 #endif /* __GNUC__ */
513 ret
= args
->start (args
->param
);
516 #endif /* __GNUC__ */
518 GC_delete_thread(GetCurrentThreadId());
521 #endif /* __GNUC__ */
525 #endif /* !defined(MSWINCE) && !(defined(__MINGW32__) && !defined(_DLL)) */
527 #endif /* !CYGWIN32 */
533 HINSTANCE hPrevInstance
;
538 DWORD WINAPI
main_thread_start(LPVOID arg
);
540 int WINAPI
WinMain(HINSTANCE hInstance
, HINSTANCE hPrevInstance
,
541 LPWSTR lpCmdLine
, int nShowCmd
)
545 main_thread_args args
= {
546 hInstance
, hPrevInstance
, lpCmdLine
, nShowCmd
551 /* initialize everything */
554 /* start the main thread */
555 thread_h
= GC_CreateThread(
556 NULL
, 0, main_thread_start
, &args
, 0, &thread_id
);
558 if (thread_h
!= NULL
)
560 WaitForSingleObject (thread_h
, INFINITE
);
561 GetExitCodeThread (thread_h
, &exit_code
);
562 CloseHandle (thread_h
);
566 DeleteCriticalSection(&GC_allocate_ml
);
568 return (int) exit_code
;
571 DWORD WINAPI
main_thread_start(LPVOID arg
)
573 main_thread_args
* args
= (main_thread_args
*) arg
;
575 return (DWORD
) GC_WinMain (args
->hInstance
, args
->hPrevInstance
,
576 args
->lpCmdLine
, args
->nShowCmd
);
579 # else /* !MSWINCE */
581 /* Called by GC_init() - we hold the allocation lock. */
583 if (GC_thr_initialized
) return;
584 GC_main_thread
= GetCurrentThreadId();
585 GC_thr_initialized
= TRUE
;
587 /* Add the initial thread, so we can stop it. */
594 void *(*start_routine
)(void *);
599 int GC_pthread_join(pthread_t pthread_id
, void **retval
) {
604 # if DEBUG_CYGWIN_THREADS
605 GC_printf3("thread 0x%x(0x%x) is joining thread 0x%x.\n",
606 (int)pthread_self(), GetCurrentThreadId(), (int)pthread_id
);
609 /* Thread being joined might not have registered itself yet. */
610 /* After the join,thread id may have been recycled. */
611 /* FIXME: It would be better if this worked more like */
612 /* pthread_support.c. */
614 while ((me
= GC_lookup_thread(pthread_id
)) == 0) Sleep(10);
616 result
= pthread_join(pthread_id
, retval
);
618 GC_delete_gc_thread(me
);
620 # if DEBUG_CYGWIN_THREADS
621 GC_printf3("thread 0x%x(0x%x) completed join with thread 0x%x.\n",
622 (int)pthread_self(), GetCurrentThreadId(), (int)pthread_id
);
628 /* Cygwin-pthreads calls CreateThread internally, but it's not
629 * easily interceptible by us..
630 * so intercept pthread_create instead
633 GC_pthread_create(pthread_t
*new_thread
,
634 const pthread_attr_t
*attr
,
635 void *(*start_routine
)(void *), void *arg
) {
637 struct start_info
* si
;
639 if (!GC_is_initialized
) GC_init();
640 /* make sure GC is initialized (i.e. main thread is attached) */
642 /* This is otherwise saved only in an area mmapped by the thread */
643 /* library, which isn't visible to the collector. */
644 si
= GC_malloc_uncollectable(sizeof(struct start_info
));
645 if (0 == si
) return(EAGAIN
);
647 si
-> start_routine
= start_routine
;
650 pthread_attr_getdetachstate(attr
, &si
->detached
)
651 == PTHREAD_CREATE_DETACHED
) {
655 # if DEBUG_CYGWIN_THREADS
656 GC_printf2("About to create a thread from 0x%x(0x%x)\n",
657 (int)pthread_self(), GetCurrentThreadId
);
659 result
= pthread_create(new_thread
, attr
, GC_start_routine
, si
);
661 if (result
) { /* failure */
668 void * GC_start_routine(void * arg
)
670 struct start_info
* si
= arg
;
672 void *(*start
)(void *);
674 pthread_t pthread_id
;
679 # if DEBUG_CYGWIN_THREADS
680 GC_printf2("thread 0x%x(0x%x) starting...\n",(int)pthread_self(),
681 GetCurrentThreadId());
684 /* If a GC occurs before the thread is registered, that GC will */
685 /* ignore this thread. That's fine, since it will block trying to */
686 /* acquire the allocation lock, and won't yet hold interesting */
689 /* We register the thread here instead of in the parent, so that */
690 /* we don't need to hold the allocation lock during pthread_create. */
691 me
= GC_new_thread();
694 start
= si
-> start_routine
;
695 start_arg
= si
-> arg
;
696 if (si
-> detached
) me
-> flags
|= DETACHED
;
697 me
-> pthread_id
= pthread_id
= pthread_self();
699 GC_free(si
); /* was allocated uncollectable */
701 pthread_cleanup_push(GC_thread_exit_proc
, (void *)me
);
702 result
= (*start
)(start_arg
);
703 me
-> status
= result
;
704 pthread_cleanup_pop(0);
706 # if DEBUG_CYGWIN_THREADS
707 GC_printf2("thread 0x%x(0x%x) returned from start routine.\n",
708 (int)pthread_self(),GetCurrentThreadId());
714 void GC_thread_exit_proc(void *arg
)
716 GC_thread me
= (GC_thread
)arg
;
719 # if DEBUG_CYGWIN_THREADS
720 GC_printf2("thread 0x%x(0x%x) called pthread_exit().\n",
721 (int)pthread_self(),GetCurrentThreadId());
725 if (me
-> flags
& DETACHED
) {
726 GC_delete_thread(GetCurrentThreadId());
728 /* deallocate it as part of join */
729 me
-> flags
|= FINISHED
;
734 /* nothing required here... */
735 int GC_pthread_sigmask(int how
, const sigset_t
*set
, sigset_t
*oset
) {
736 return pthread_sigmask(how
, set
, oset
);
739 int GC_pthread_detach(pthread_t thread
)
742 GC_thread thread_gc_id
;
745 thread_gc_id
= GC_lookup_thread(thread
);
747 result
= pthread_detach(thread
);
750 thread_gc_id
-> flags
|= DETACHED
;
751 /* Here the pthread thread id may have been recycled. */
752 if (thread_gc_id
-> flags
& FINISHED
) {
753 GC_delete_gc_thread(thread_gc_id
);
760 GC_PTR
GC_get_thread_stack_base()
763 return ((NT_TIB
*)NtCurrentTeb())->StackBase
;
765 extern GC_PTR _tlsbase
__asm__ ("%fs:4");
770 #else /* !CYGWIN32 */
773 * We avoid acquiring locks here, since this doesn't seem to be preemptable.
774 * Pontus Rydin suggests wrapping the thread start routine instead.
777 BOOL WINAPI
DllMain(HINSTANCE inst
, ULONG reason
, LPVOID reserved
)
780 case DLL_PROCESS_ATTACH
:
781 GC_init(); /* Force initialization before thread attach. */
783 case DLL_THREAD_ATTACH
:
784 GC_ASSERT(GC_thr_initialized
);
785 if (GC_main_thread
!= GetCurrentThreadId()) {
787 } /* o.w. we already did it during GC_thr_init(), called by GC_init() */
790 case DLL_THREAD_DETACH
:
791 GC_delete_thread(GetCurrentThreadId());
794 case DLL_PROCESS_DETACH
:
799 for (i
= 0; i
<= GC_get_max_thread_index(); ++i
)
801 if (thread_table
[i
].in_use
)
802 GC_delete_gc_thread(thread_table
+ i
);
807 DeleteCriticalSection(&GC_allocate_ml
);
815 #endif /* !CYGWIN32 */
817 # endif /* !MSWINCE */
819 #endif /* GC_WIN32_THREADS */