| #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; |
| |
| #ifndef DONT_USE_CRITICAL_SECTION |
| |
| /* Critical Sections used instead of mutexes: lightweight, |
| * but can't be communicated to child processes, and can't get |
| * HANDLE to it for use elsewhere. |
| */ |
| typedef CRITICAL_SECTION perl_mutex; |
| #define MUTEX_INIT(m) InitializeCriticalSection(m) |
| #define MUTEX_LOCK(m) EnterCriticalSection(m) |
| #define MUTEX_UNLOCK(m) LeaveCriticalSection(m) |
| #define MUTEX_DESTROY(m) DeleteCriticalSection(m) |
| |
| #else |
| |
| typedef HANDLE perl_mutex; |
| # define MUTEX_INIT(m) \ |
| STMT_START { \ |
| if ((*(m) = CreateMutex(NULL,FALSE,NULL)) == NULL) \ |
| Perl_croak_nocontext("panic: MUTEX_INIT"); \ |
| } STMT_END |
| |
| # define MUTEX_LOCK(m) \ |
| STMT_START { \ |
| if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \ |
| Perl_croak_nocontext("panic: MUTEX_LOCK"); \ |
| } STMT_END |
| |
| # define MUTEX_UNLOCK(m) \ |
| STMT_START { \ |
| if (ReleaseMutex(*(m)) == 0) \ |
| Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \ |
| } STMT_END |
| |
| # define MUTEX_DESTROY(m) \ |
| STMT_START { \ |
| if (CloseHandle(*(m)) == 0) \ |
| Perl_croak_nocontext("panic: MUTEX_DESTROY"); \ |
| } STMT_END |
| |
| #endif |
| |
| /* These macros assume that the mutex associated with the condition |
| * will always be held before COND_{SIGNAL,BROADCAST,WAIT,DESTROY}, |
| * so there's no separate mutex protecting access to (c)->waiters |
| */ |
| #define COND_INIT(c) \ |
| STMT_START { \ |
| (c)->waiters = 0; \ |
| (c)->sem = Win_CreateSemaphore(NULL,0,LONG_MAX,NULL); \ |
| if ((c)->sem == NULL) \ |
| 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) \ |
| 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) \ |
| Perl_croak_nocontext("panic: COND_BROADCAST (%ld)",GetLastError());\ |
| } STMT_END |
| |
| #define COND_WAIT(c, m) \ |
| STMT_START { \ |
| (c)->waiters++; \ |
| MUTEX_UNLOCK(m); \ |
| /* Note that there's no race here, since a \ |
| * 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)\ |
| Perl_croak_nocontext("panic: COND_WAIT (%ld)",GetLastError()); \ |
| /* XXX there may be an inconsequential race here */ \ |
| MUTEX_LOCK(m); \ |
| (c)->waiters--; \ |
| } STMT_END |
| |
| #define COND_DESTROY(c) \ |
| STMT_START { \ |
| (c)->waiters = 0; \ |
| if (CloseHandle((c)->sem) == 0) \ |
| Perl_croak_nocontext("panic: COND_DESTROY (%ld)",GetLastError()); \ |
| } STMT_END |
| |
| #define DETACH(t) \ |
| STMT_START { \ |
| if (CloseHandle((t)->self) == 0) { \ |
| MUTEX_UNLOCK(&(t)->mutex); \ |
| Perl_croak_nocontext("panic: DETACH"); \ |
| } \ |
| } STMT_END |
| |
| |
| #define THREAD_CREATE(t, f) Perl_thread_create(t, f) |
| #define THREAD_POST_CREATE(t) NOOP |
| |
| /* 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 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 <process.h> |
| # if 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 *); |
| |
| |
| START_EXTERN_C |
| |
| #if defined(PERLDLL) && defined(USE_DECLSPEC_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 PERL_GET_CONTEXT Perl_get_context() |
| #define PERL_SET_CONTEXT(t) Perl_set_context(t) |
| #endif |
| |
| END_EXTERN_C |
| |
| #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) \ |
| || (CloseHandle((t)->self) == 0)) \ |
| Perl_croak_nocontext("panic: JOIN"); \ |
| } STMT_END |
| #endif /* !USE_RTL_THREAD_API || _MSC_VER */ |
| |
| #define YIELD Sleep(0) |
| |
| #endif /* _WIN32THREAD_H */ |
| |