X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/c69f112c145fabe210a7e2c5c2406baeea71af2f..3c841f204981f702a769e4ea6da93e7b55a75bc0:/win32/win32thread.h diff --git a/win32/win32thread.h b/win32/win32thread.h index 6f355f0..8c02fa1 100644 --- a/win32/win32thread.h +++ b/win32/win32thread.h @@ -1,5 +1,8 @@ #ifndef _WIN32THREAD_H #define _WIN32THREAD_H + +#include "win32.h" + typedef struct win32_cond { LONG waiters; HANDLE sem; } perl_cond; typedef DWORD perl_key; typedef HANDLE perl_os_thread; @@ -19,25 +22,28 @@ typedef CRITICAL_SECTION perl_mutex; #else typedef HANDLE perl_mutex; -#define MUTEX_INIT(m) \ +# define MUTEX_INIT(m) \ STMT_START { \ if ((*(m) = CreateMutex(NULL,FALSE,NULL)) == NULL) \ - croak("panic: MUTEX_INIT"); \ + Perl_croak_nocontext("panic: MUTEX_INIT"); \ } STMT_END -#define MUTEX_LOCK(m) \ + +# define MUTEX_LOCK(m) \ STMT_START { \ if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \ - croak("panic: MUTEX_LOCK"); \ + Perl_croak_nocontext("panic: MUTEX_LOCK"); \ } STMT_END -#define MUTEX_UNLOCK(m) \ + +# define MUTEX_UNLOCK(m) \ STMT_START { \ if (ReleaseMutex(*(m)) == 0) \ - croak("panic: MUTEX_UNLOCK"); \ + Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \ } STMT_END -#define MUTEX_DESTROY(m) \ + +# define MUTEX_DESTROY(m) \ STMT_START { \ if (CloseHandle(*(m)) == 0) \ - croak("panic: MUTEX_DESTROY"); \ + Perl_croak_nocontext("panic: MUTEX_DESTROY"); \ } STMT_END #endif @@ -51,21 +57,21 @@ typedef HANDLE perl_mutex; (c)->waiters = 0; \ (c)->sem = CreateSemaphore(NULL,0,LONG_MAX,NULL); \ if ((c)->sem == NULL) \ - croak("panic: COND_INIT (%ld)",GetLastError()); \ + Perl_croak_nocontext("panic: COND_INIT (%ld)",GetLastError()); \ } STMT_END #define COND_SIGNAL(c) \ STMT_START { \ if ((c)->waiters > 0 && \ ReleaseSemaphore((c)->sem,1,NULL) == 0) \ - croak("panic: COND_SIGNAL (%ld)",GetLastError()); \ + Perl_croak_nocontext("panic: COND_SIGNAL (%ld)",GetLastError()); \ } STMT_END #define COND_BROADCAST(c) \ STMT_START { \ if ((c)->waiters > 0 && \ ReleaseSemaphore((c)->sem,(c)->waiters,NULL) == 0) \ - croak("panic: COND_BROADCAST (%ld)",GetLastError());\ + Perl_croak_nocontext("panic: COND_BROADCAST (%ld)",GetLastError());\ } STMT_END #define COND_WAIT(c, m) \ @@ -76,7 +82,7 @@ typedef HANDLE perl_mutex; * COND_BROADCAST() on another thread will have seen the\ * right number of waiters (i.e. including this one) */ \ if (WaitForSingleObject((c)->sem,INFINITE)==WAIT_FAILED)\ - croak("panic: COND_WAIT (%ld)",GetLastError()); \ + Perl_croak_nocontext("panic: COND_WAIT (%ld)",GetLastError()); \ /* XXX there may be an inconsequential race here */ \ MUTEX_LOCK(m); \ (c)->waiters--; \ @@ -86,22 +92,53 @@ typedef HANDLE perl_mutex; STMT_START { \ (c)->waiters = 0; \ if (CloseHandle((c)->sem) == 0) \ - croak("panic: COND_DESTROY (%ld)",GetLastError()); \ + Perl_croak_nocontext("panic: COND_DESTROY (%ld)",GetLastError()); \ } STMT_END #define DETACH(t) \ STMT_START { \ if (CloseHandle((t)->self) == 0) { \ MUTEX_UNLOCK(&(t)->mutex); \ - croak("panic: DETACH"); \ + Perl_croak_nocontext("panic: DETACH"); \ } \ } STMT_END #define THREAD_CREATE(t, f) Perl_thread_create(t, f) #define THREAD_POST_CREATE(t) NOOP -#define THREAD_RET_TYPE DWORD WINAPI -#define THREAD_RET_CAST(p) ((DWORD)(p)) + +/* XXX Docs mention that the RTL versions of thread creation routines + * should be used, but that advice only seems applicable when the RTL + * is not in a DLL. RTL DLLs in both Borland and VC seem to do all of + * the init/deinit required upon DLL_THREAD_ATTACH/DETACH. So we seem + * to be completely safe using straight Win32 API calls, rather than + * the much braindamaged RTL calls. + * + * _beginthread() in the RTLs call CloseHandle() just after the thread + * function returns, which means: 1) we have a race on our hands + * 2) it is impossible to implement join() semantics. + * + * IOW, do *NOT* turn on USE_RTL_THREAD_API! It is here + * for experimental purposes only. GSAR 98-01-02 + */ +#ifdef USE_RTL_THREAD_API +# include +# if defined(__BORLANDC__) + /* Borland RTL doesn't allow a return value from thread function! */ +# define THREAD_RET_TYPE void _USERENTRY +# define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p))) +# elif defined (_MSC_VER) +# define THREAD_RET_TYPE unsigned __stdcall +# define THREAD_RET_CAST(p) ((unsigned)(p)) +# else + /* CRTDLL.DLL doesn't allow a return value from thread function! */ +# define THREAD_RET_TYPE void __cdecl +# define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p))) +# endif +#else /* !USE_RTL_THREAD_API */ +# define THREAD_RET_TYPE DWORD WINAPI +# define THREAD_RET_CAST(p) ((DWORD)(p)) +#endif /* !USE_RTL_THREAD_API */ typedef THREAD_RET_TYPE thread_func_t(void *); @@ -109,33 +146,50 @@ typedef THREAD_RET_TYPE thread_func_t(void *); START_EXTERN_C #if defined(PERLDLL) && defined(USE_DECLSPEC_THREAD) && (!defined(__BORLANDC__) || defined(_DLL)) -extern __declspec(thread) struct perl_thread *Perl_current_thread; -#define SET_THR(t) (Perl_current_thread = t) -#define THR Perl_current_thread +extern __declspec(thread) void *PL_current_context; +#define PERL_SET_CONTEXT(t) (PL_current_context = t) +#define PERL_GET_CONTEXT PL_current_context #else -#define THR Perl_getTHR() -#define SET_THR(t) Perl_setTHR(t) +#define PERL_GET_CONTEXT Perl_get_context() +#define PERL_SET_CONTEXT(t) Perl_set_context(t) #endif -struct perl_thread; - -void Perl_alloc_thread_key _((void)); -int Perl_thread_create _((struct perl_thread *thr, thread_func_t *fn)); -void Perl_set_thread_self _((struct perl_thread *thr)); -struct perl_thread *Perl_getTHR _((void)); -void Perl_setTHR _((struct perl_thread *t)); END_EXTERN_C -#define INIT_THREADS NOOP -#define ALLOC_THREAD_KEY Perl_alloc_thread_key() -#define SET_THREAD_SELF(thr) Perl_set_thread_self(thr) +#define INIT_THREADS NOOP +#define ALLOC_THREAD_KEY \ + STMT_START { \ + if ((PL_thr_key = TlsAlloc()) == TLS_OUT_OF_INDEXES) { \ + PerlIO_printf(PerlIO_stderr(),"panic: TlsAlloc"); \ + exit(1); \ + } \ + } STMT_END + +#define FREE_THREAD_KEY \ + STMT_START { \ + TlsFree(PL_thr_key); \ + } STMT_END + +#define PTHREAD_ATFORK(prepare,parent,child) NOOP +#if defined(USE_RTL_THREAD_API) && !defined(_MSC_VER) +#define JOIN(t, avp) \ + STMT_START { \ + if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \ + || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \ + || (CloseHandle((t)->self) == 0)) \ + Perl_croak_nocontext("panic: JOIN"); \ + *avp = (AV *)((t)->i.retv); \ + } STMT_END +#else /* !USE_RTL_THREAD_API || _MSC_VER */ #define JOIN(t, avp) \ STMT_START { \ if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \ - || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0)) \ - croak("panic: JOIN"); \ + || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \ + || (CloseHandle((t)->self) == 0)) \ + Perl_croak_nocontext("panic: JOIN"); \ } STMT_END +#endif /* !USE_RTL_THREAD_API || _MSC_VER */ #define YIELD Sleep(0)