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d55594ae GS |
1 | #ifndef _WIN32THREAD_H |
2 | #define _WIN32THREAD_H | |
4f63d024 | 3 | |
7766f137 | 4 | #include "win32.h" |
4f63d024 | 5 | |
d55594ae | 6 | typedef struct win32_cond { LONG waiters; HANDLE sem; } perl_cond; |
ea0efc06 | 7 | typedef DWORD perl_key; |
51dd5992 | 8 | typedef HANDLE perl_os_thread; |
ea0efc06 | 9 | |
4b026b9e GS |
10 | #ifndef DONT_USE_CRITICAL_SECTION |
11 | ||
12 | /* Critical Sections used instead of mutexes: lightweight, | |
ea0efc06 | 13 | * but can't be communicated to child processes, and can't get |
4b026b9e | 14 | * HANDLE to it for use elsewhere. |
ea0efc06 | 15 | */ |
d55594ae | 16 | typedef CRITICAL_SECTION perl_mutex; |
ea0efc06 MB |
17 | #define MUTEX_INIT(m) InitializeCriticalSection(m) |
18 | #define MUTEX_LOCK(m) EnterCriticalSection(m) | |
19 | #define MUTEX_UNLOCK(m) LeaveCriticalSection(m) | |
4f63d024 GS |
20 | #define MUTEX_LOCK_NOCONTEXT(m) EnterCriticalSection(m) |
21 | #define MUTEX_UNLOCK_NOCONTEXT(m) LeaveCriticalSection(m) | |
ea0efc06 | 22 | #define MUTEX_DESTROY(m) DeleteCriticalSection(m) |
4b026b9e | 23 | |
d55594ae | 24 | #else |
ea0efc06 | 25 | |
4b026b9e | 26 | typedef HANDLE perl_mutex; |
ea0efc06 MB |
27 | #define MUTEX_INIT(m) \ |
28 | STMT_START { \ | |
29 | if ((*(m) = CreateMutex(NULL,FALSE,NULL)) == NULL) \ | |
4f63d024 | 30 | Perl_croak(aTHX_ "panic: MUTEX_INIT"); \ |
ea0efc06 MB |
31 | } STMT_END |
32 | #define MUTEX_LOCK(m) \ | |
33 | STMT_START { \ | |
34 | if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \ | |
4f63d024 | 35 | Perl_croak(aTHX_ "panic: MUTEX_LOCK"); \ |
ea0efc06 MB |
36 | } STMT_END |
37 | #define MUTEX_UNLOCK(m) \ | |
38 | STMT_START { \ | |
39 | if (ReleaseMutex(*(m)) == 0) \ | |
4f63d024 GS |
40 | Perl_croak(aTHX_ "panic: MUTEX_UNLOCK"); \ |
41 | } STMT_END | |
42 | #define MUTEX_LOCK_NOCONTEXT(m) \ | |
43 | STMT_START { \ | |
44 | if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \ | |
45 | Perl_croak_nocontext("panic: MUTEX_LOCK"); \ | |
46 | } STMT_END | |
47 | #define MUTEX_UNLOCK_NOCONTEXT(m) \ | |
48 | STMT_START { \ | |
49 | if (ReleaseMutex(*(m)) == 0) \ | |
50 | Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \ | |
ea0efc06 MB |
51 | } STMT_END |
52 | #define MUTEX_DESTROY(m) \ | |
53 | STMT_START { \ | |
54 | if (CloseHandle(*(m)) == 0) \ | |
4f63d024 | 55 | Perl_croak(aTHX_ "panic: MUTEX_DESTROY"); \ |
ea0efc06 MB |
56 | } STMT_END |
57 | ||
d55594ae GS |
58 | #endif |
59 | ||
60 | /* These macros assume that the mutex associated with the condition | |
61 | * will always be held before COND_{SIGNAL,BROADCAST,WAIT,DESTROY}, | |
62 | * so there's no separate mutex protecting access to (c)->waiters | |
63 | */ | |
ea0efc06 | 64 | #define COND_INIT(c) \ |
4b026b9e GS |
65 | STMT_START { \ |
66 | (c)->waiters = 0; \ | |
67 | (c)->sem = CreateSemaphore(NULL,0,LONG_MAX,NULL); \ | |
68 | if ((c)->sem == NULL) \ | |
4f63d024 | 69 | Perl_croak(aTHX_ "panic: COND_INIT (%ld)",GetLastError()); \ |
ea0efc06 | 70 | } STMT_END |
d55594ae | 71 | |
ea0efc06 | 72 | #define COND_SIGNAL(c) \ |
4b026b9e GS |
73 | STMT_START { \ |
74 | if ((c)->waiters > 0 && \ | |
75 | ReleaseSemaphore((c)->sem,1,NULL) == 0) \ | |
4f63d024 | 76 | Perl_croak(aTHX_ "panic: COND_SIGNAL (%ld)",GetLastError()); \ |
ea0efc06 | 77 | } STMT_END |
d55594ae | 78 | |
ea0efc06 | 79 | #define COND_BROADCAST(c) \ |
4b026b9e GS |
80 | STMT_START { \ |
81 | if ((c)->waiters > 0 && \ | |
82 | ReleaseSemaphore((c)->sem,(c)->waiters,NULL) == 0) \ | |
4f63d024 | 83 | Perl_croak(aTHX_ "panic: COND_BROADCAST (%ld)",GetLastError());\ |
ea0efc06 | 84 | } STMT_END |
d55594ae | 85 | |
ea0efc06 | 86 | #define COND_WAIT(c, m) \ |
4b026b9e GS |
87 | STMT_START { \ |
88 | (c)->waiters++; \ | |
89 | MUTEX_UNLOCK(m); \ | |
90 | /* Note that there's no race here, since a \ | |
91 | * COND_BROADCAST() on another thread will have seen the\ | |
92 | * right number of waiters (i.e. including this one) */ \ | |
93 | if (WaitForSingleObject((c)->sem,INFINITE)==WAIT_FAILED)\ | |
4f63d024 | 94 | Perl_croak(aTHX_ "panic: COND_WAIT (%ld)",GetLastError()); \ |
4b026b9e GS |
95 | /* XXX there may be an inconsequential race here */ \ |
96 | MUTEX_LOCK(m); \ | |
97 | (c)->waiters--; \ | |
ea0efc06 | 98 | } STMT_END |
d55594ae | 99 | |
ea0efc06 | 100 | #define COND_DESTROY(c) \ |
4b026b9e GS |
101 | STMT_START { \ |
102 | (c)->waiters = 0; \ | |
103 | if (CloseHandle((c)->sem) == 0) \ | |
4f63d024 | 104 | Perl_croak(aTHX_ "panic: COND_DESTROY (%ld)",GetLastError()); \ |
ea0efc06 MB |
105 | } STMT_END |
106 | ||
107 | #define DETACH(t) \ | |
108 | STMT_START { \ | |
46930d8f | 109 | if (CloseHandle((t)->self) == 0) { \ |
ea0efc06 | 110 | MUTEX_UNLOCK(&(t)->mutex); \ |
4f63d024 | 111 | Perl_croak(aTHX_ "panic: DETACH"); \ |
ea0efc06 MB |
112 | } \ |
113 | } STMT_END | |
114 | ||
9811a7d7 | 115 | |
d55594ae GS |
116 | #define THREAD_CREATE(t, f) Perl_thread_create(t, f) |
117 | #define THREAD_POST_CREATE(t) NOOP | |
2d7a9237 GS |
118 | |
119 | /* XXX Docs mention that the RTL versions of thread creation routines | |
120 | * should be used, but that advice only seems applicable when the RTL | |
121 | * is not in a DLL. RTL DLLs in both Borland and VC seem to do all of | |
122 | * the init/deinit required upon DLL_THREAD_ATTACH/DETACH. So we seem | |
123 | * to be completely safe using straight Win32 API calls, rather than | |
124 | * the much braindamaged RTL calls. | |
125 | * | |
126 | * _beginthread() in the RTLs call CloseHandle() just after the thread | |
127 | * function returns, which means: 1) we have a race on our hands | |
128 | * 2) it is impossible to implement join() semantics. | |
129 | * | |
130 | * IOW, do *NOT* turn on USE_RTL_THREAD_API! It is here | |
131 | * for experimental purposes only. GSAR 98-01-02 | |
132 | */ | |
133 | #ifdef USE_RTL_THREAD_API | |
134 | # include <process.h> | |
135 | # if defined(__BORLANDC__) | |
136 | /* Borland RTL doesn't allow a return value from thread function! */ | |
137 | # define THREAD_RET_TYPE void _USERENTRY | |
138 | # define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p))) | |
139 | # elif defined (_MSC_VER) | |
140 | # define THREAD_RET_TYPE unsigned __stdcall | |
141 | # define THREAD_RET_CAST(p) ((unsigned)(p)) | |
142 | # else | |
143 | /* CRTDLL.DLL doesn't allow a return value from thread function! */ | |
144 | # define THREAD_RET_TYPE void __cdecl | |
145 | # define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p))) | |
146 | # endif | |
147 | #else /* !USE_RTL_THREAD_API */ | |
148 | # define THREAD_RET_TYPE DWORD WINAPI | |
149 | # define THREAD_RET_CAST(p) ((DWORD)(p)) | |
150 | #endif /* !USE_RTL_THREAD_API */ | |
ea0efc06 | 151 | |
d55594ae GS |
152 | typedef THREAD_RET_TYPE thread_func_t(void *); |
153 | ||
0fefa03b | 154 | |
d55594ae | 155 | START_EXTERN_C |
0fefa03b | 156 | |
c69f112c | 157 | #if defined(PERLDLL) && defined(USE_DECLSPEC_THREAD) && (!defined(__BORLANDC__) || defined(_DLL)) |
0372dfcf | 158 | extern __declspec(thread) struct perl_thread *Perl_current_thread; |
0fefa03b NIS |
159 | #define SET_THR(t) (Perl_current_thread = t) |
160 | #define THR Perl_current_thread | |
161 | #else | |
162 | #define THR Perl_getTHR() | |
163 | #define SET_THR(t) Perl_setTHR(t) | |
164 | #endif | |
c69f112c | 165 | struct perl_thread; |
0fefa03b | 166 | |
20ce7b12 GS |
167 | void Perl_alloc_thread_key (void); |
168 | int Perl_thread_create (struct perl_thread *thr, thread_func_t *fn); | |
169 | void Perl_set_thread_self (struct perl_thread *thr); | |
170 | struct perl_thread *Perl_getTHR (void); | |
171 | void Perl_setTHR (struct perl_thread *t); | |
172 | void Perl_init_thread_intern (struct perl_thread *t); | |
0fefa03b | 173 | |
d55594ae GS |
174 | END_EXTERN_C |
175 | ||
176 | #define INIT_THREADS NOOP | |
c69f112c | 177 | #define ALLOC_THREAD_KEY Perl_alloc_thread_key() |
235db74f | 178 | #define SET_THREAD_SELF(thr) Perl_set_thread_self(thr) |
ea0efc06 | 179 | |
2d7a9237 GS |
180 | #if defined(USE_RTL_THREAD_API) && !defined(_MSC_VER) |
181 | #define JOIN(t, avp) \ | |
182 | STMT_START { \ | |
183 | if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \ | |
8e11982f GS |
184 | || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \ |
185 | || (CloseHandle((t)->self) == 0)) \ | |
4f63d024 | 186 | Perl_croak(aTHX_ "panic: JOIN"); \ |
2d7a9237 GS |
187 | *avp = (AV *)((t)->i.retv); \ |
188 | } STMT_END | |
189 | #else /* !USE_RTL_THREAD_API || _MSC_VER */ | |
ea0efc06 MB |
190 | #define JOIN(t, avp) \ |
191 | STMT_START { \ | |
46930d8f | 192 | if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \ |
8e11982f GS |
193 | || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \ |
194 | || (CloseHandle((t)->self) == 0)) \ | |
7766f137 | 195 | Perl_croak(aTHX_ "panic: JOIN"); \ |
ea0efc06 | 196 | } STMT_END |
2d7a9237 | 197 | #endif /* !USE_RTL_THREAD_API || _MSC_VER */ |
ea0efc06 | 198 | |
ea0efc06 | 199 | #define YIELD Sleep(0) |
d55594ae GS |
200 | |
201 | #endif /* _WIN32THREAD_H */ | |
0fefa03b | 202 |