3 typedef struct win32_cond { LONG waiters; HANDLE sem; } perl_cond;
4 typedef DWORD perl_key;
5 typedef HANDLE perl_os_thread;
7 #ifndef DONT_USE_CRITICAL_SECTION
9 /* Critical Sections used instead of mutexes: lightweight,
10 * but can't be communicated to child processes, and can't get
11 * HANDLE to it for use elsewhere.
13 typedef CRITICAL_SECTION perl_mutex;
14 #define MUTEX_INIT(m) InitializeCriticalSection(m)
15 #define MUTEX_LOCK(m) EnterCriticalSection(m)
16 #define MUTEX_UNLOCK(m) LeaveCriticalSection(m)
17 #define MUTEX_DESTROY(m) DeleteCriticalSection(m)
21 typedef HANDLE perl_mutex;
22 #define MUTEX_INIT(m) \
24 if ((*(m) = CreateMutex(NULL,FALSE,NULL)) == NULL) \
25 croak("panic: MUTEX_INIT"); \
27 #define MUTEX_LOCK(m) \
29 if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \
30 croak("panic: MUTEX_LOCK"); \
32 #define MUTEX_UNLOCK(m) \
34 if (ReleaseMutex(*(m)) == 0) \
35 croak("panic: MUTEX_UNLOCK"); \
37 #define MUTEX_DESTROY(m) \
39 if (CloseHandle(*(m)) == 0) \
40 croak("panic: MUTEX_DESTROY"); \
45 /* These macros assume that the mutex associated with the condition
46 * will always be held before COND_{SIGNAL,BROADCAST,WAIT,DESTROY},
47 * so there's no separate mutex protecting access to (c)->waiters
49 #define COND_INIT(c) \
52 (c)->sem = CreateSemaphore(NULL,0,LONG_MAX,NULL); \
53 if ((c)->sem == NULL) \
54 croak("panic: COND_INIT (%ld)",GetLastError()); \
57 #define COND_SIGNAL(c) \
59 if ((c)->waiters > 0 && \
60 ReleaseSemaphore((c)->sem,1,NULL) == 0) \
61 croak("panic: COND_SIGNAL (%ld)",GetLastError()); \
64 #define COND_BROADCAST(c) \
66 if ((c)->waiters > 0 && \
67 ReleaseSemaphore((c)->sem,(c)->waiters,NULL) == 0) \
68 croak("panic: COND_BROADCAST (%ld)",GetLastError());\
71 #define COND_WAIT(c, m) \
75 /* Note that there's no race here, since a \
76 * COND_BROADCAST() on another thread will have seen the\
77 * right number of waiters (i.e. including this one) */ \
78 if (WaitForSingleObject((c)->sem,INFINITE)==WAIT_FAILED)\
79 croak("panic: COND_WAIT (%ld)",GetLastError()); \
80 /* XXX there may be an inconsequential race here */ \
85 #define COND_DESTROY(c) \
88 if (CloseHandle((c)->sem) == 0) \
89 croak("panic: COND_DESTROY (%ld)",GetLastError()); \
94 if (CloseHandle((t)->self) == 0) { \
95 MUTEX_UNLOCK(&(t)->mutex); \
96 croak("panic: DETACH"); \
101 #define THREAD_CREATE(t, f) Perl_thread_create(t, f)
102 #define THREAD_POST_CREATE(t) NOOP
104 /* XXX Docs mention that the RTL versions of thread creation routines
105 * should be used, but that advice only seems applicable when the RTL
106 * is not in a DLL. RTL DLLs in both Borland and VC seem to do all of
107 * the init/deinit required upon DLL_THREAD_ATTACH/DETACH. So we seem
108 * to be completely safe using straight Win32 API calls, rather than
109 * the much braindamaged RTL calls.
111 * _beginthread() in the RTLs call CloseHandle() just after the thread
112 * function returns, which means: 1) we have a race on our hands
113 * 2) it is impossible to implement join() semantics.
115 * IOW, do *NOT* turn on USE_RTL_THREAD_API! It is here
116 * for experimental purposes only. GSAR 98-01-02
118 #ifdef USE_RTL_THREAD_API
119 # include <process.h>
120 # if defined(__BORLANDC__)
121 /* Borland RTL doesn't allow a return value from thread function! */
122 # define THREAD_RET_TYPE void _USERENTRY
123 # define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p)))
124 # elif defined (_MSC_VER)
125 # define THREAD_RET_TYPE unsigned __stdcall
126 # define THREAD_RET_CAST(p) ((unsigned)(p))
128 /* CRTDLL.DLL doesn't allow a return value from thread function! */
129 # define THREAD_RET_TYPE void __cdecl
130 # define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p)))
132 #else /* !USE_RTL_THREAD_API */
133 # define THREAD_RET_TYPE DWORD WINAPI
134 # define THREAD_RET_CAST(p) ((DWORD)(p))
135 #endif /* !USE_RTL_THREAD_API */
137 typedef THREAD_RET_TYPE thread_func_t(void *);
142 #if defined(PERLDLL) && defined(USE_DECLSPEC_THREAD) && (!defined(__BORLANDC__) || defined(_DLL))
143 extern __declspec(thread) struct perl_thread *Perl_current_thread;
144 #define SET_THR(t) (Perl_current_thread = t)
145 #define THR Perl_current_thread
147 #define THR Perl_getTHR()
148 #define SET_THR(t) Perl_setTHR(t)
152 void Perl_alloc_thread_key _((void));
153 int Perl_thread_create _((struct perl_thread *thr, thread_func_t *fn));
154 void Perl_set_thread_self _((struct perl_thread *thr));
155 struct perl_thread *Perl_getTHR _((void));
156 void Perl_setTHR _((struct perl_thread *t));
157 void Perl_init_thread_intern _((struct perl_thread *t));
161 #define INIT_THREADS NOOP
162 #define ALLOC_THREAD_KEY Perl_alloc_thread_key()
163 #define SET_THREAD_SELF(thr) Perl_set_thread_self(thr)
165 #if defined(USE_RTL_THREAD_API) && !defined(_MSC_VER)
166 #define JOIN(t, avp) \
168 if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \
169 || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0)) \
170 croak("panic: JOIN"); \
171 *avp = (AV *)((t)->i.retv); \
173 #else /* !USE_RTL_THREAD_API || _MSC_VER */
174 #define JOIN(t, avp) \
176 if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \
177 || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0)) \
178 croak("panic: JOIN"); \
180 #endif /* !USE_RTL_THREAD_API || _MSC_VER */
182 #define YIELD Sleep(0)
184 #endif /* _WIN32THREAD_H */