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comparison perl-5.22.2/win32/win32thread.h @ 8045:a16537d2fe07
<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author | HackBot |
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date | Sat, 14 May 2016 14:54:38 +0000 |
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8044:711c038a7dce | 8045:a16537d2fe07 |
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1 #ifndef _WIN32THREAD_H | |
2 #define _WIN32THREAD_H | |
3 | |
4 #include "win32.h" | |
5 | |
6 typedef struct win32_cond { LONG waiters; HANDLE sem; } perl_cond; | |
7 typedef DWORD perl_key; | |
8 typedef HANDLE perl_os_thread; | |
9 | |
10 #ifndef DONT_USE_CRITICAL_SECTION | |
11 | |
12 /* Critical Sections used instead of mutexes: lightweight, | |
13 * but can't be communicated to child processes, and can't get | |
14 * HANDLE to it for use elsewhere. | |
15 */ | |
16 typedef CRITICAL_SECTION perl_mutex; | |
17 #define MUTEX_INIT(m) InitializeCriticalSection(m) | |
18 #define MUTEX_LOCK(m) EnterCriticalSection(m) | |
19 #define MUTEX_UNLOCK(m) LeaveCriticalSection(m) | |
20 #define MUTEX_DESTROY(m) DeleteCriticalSection(m) | |
21 | |
22 #else | |
23 | |
24 typedef HANDLE perl_mutex; | |
25 # define MUTEX_INIT(m) \ | |
26 STMT_START { \ | |
27 if ((*(m) = CreateMutex(NULL,FALSE,NULL)) == NULL) \ | |
28 Perl_croak_nocontext("panic: MUTEX_INIT"); \ | |
29 } STMT_END | |
30 | |
31 # define MUTEX_LOCK(m) \ | |
32 STMT_START { \ | |
33 if (WaitForSingleObject(*(m),INFINITE) == WAIT_FAILED) \ | |
34 Perl_croak_nocontext("panic: MUTEX_LOCK"); \ | |
35 } STMT_END | |
36 | |
37 # define MUTEX_UNLOCK(m) \ | |
38 STMT_START { \ | |
39 if (ReleaseMutex(*(m)) == 0) \ | |
40 Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \ | |
41 } STMT_END | |
42 | |
43 # define MUTEX_DESTROY(m) \ | |
44 STMT_START { \ | |
45 if (CloseHandle(*(m)) == 0) \ | |
46 Perl_croak_nocontext("panic: MUTEX_DESTROY"); \ | |
47 } STMT_END | |
48 | |
49 #endif | |
50 | |
51 /* These macros assume that the mutex associated with the condition | |
52 * will always be held before COND_{SIGNAL,BROADCAST,WAIT,DESTROY}, | |
53 * so there's no separate mutex protecting access to (c)->waiters | |
54 */ | |
55 #define COND_INIT(c) \ | |
56 STMT_START { \ | |
57 (c)->waiters = 0; \ | |
58 (c)->sem = Win_CreateSemaphore(NULL,0,LONG_MAX,NULL); \ | |
59 if ((c)->sem == NULL) \ | |
60 Perl_croak_nocontext("panic: COND_INIT (%ld)",GetLastError()); \ | |
61 } STMT_END | |
62 | |
63 #define COND_SIGNAL(c) \ | |
64 STMT_START { \ | |
65 if ((c)->waiters > 0 && \ | |
66 ReleaseSemaphore((c)->sem,1,NULL) == 0) \ | |
67 Perl_croak_nocontext("panic: COND_SIGNAL (%ld)",GetLastError()); \ | |
68 } STMT_END | |
69 | |
70 #define COND_BROADCAST(c) \ | |
71 STMT_START { \ | |
72 if ((c)->waiters > 0 && \ | |
73 ReleaseSemaphore((c)->sem,(c)->waiters,NULL) == 0) \ | |
74 Perl_croak_nocontext("panic: COND_BROADCAST (%ld)",GetLastError());\ | |
75 } STMT_END | |
76 | |
77 #define COND_WAIT(c, m) \ | |
78 STMT_START { \ | |
79 (c)->waiters++; \ | |
80 MUTEX_UNLOCK(m); \ | |
81 /* Note that there's no race here, since a \ | |
82 * COND_BROADCAST() on another thread will have seen the\ | |
83 * right number of waiters (i.e. including this one) */ \ | |
84 if (WaitForSingleObject((c)->sem,INFINITE)==WAIT_FAILED)\ | |
85 Perl_croak_nocontext("panic: COND_WAIT (%ld)",GetLastError()); \ | |
86 /* XXX there may be an inconsequential race here */ \ | |
87 MUTEX_LOCK(m); \ | |
88 (c)->waiters--; \ | |
89 } STMT_END | |
90 | |
91 #define COND_DESTROY(c) \ | |
92 STMT_START { \ | |
93 (c)->waiters = 0; \ | |
94 if (CloseHandle((c)->sem) == 0) \ | |
95 Perl_croak_nocontext("panic: COND_DESTROY (%ld)",GetLastError()); \ | |
96 } STMT_END | |
97 | |
98 #define DETACH(t) \ | |
99 STMT_START { \ | |
100 if (CloseHandle((t)->self) == 0) { \ | |
101 MUTEX_UNLOCK(&(t)->mutex); \ | |
102 Perl_croak_nocontext("panic: DETACH"); \ | |
103 } \ | |
104 } STMT_END | |
105 | |
106 | |
107 #define THREAD_CREATE(t, f) Perl_thread_create(t, f) | |
108 #define THREAD_POST_CREATE(t) NOOP | |
109 | |
110 /* XXX Docs mention that the RTL versions of thread creation routines | |
111 * should be used, but that advice only seems applicable when the RTL | |
112 * is not in a DLL. RTL DLLs seem to do all of the init/deinit required | |
113 * upon DLL_THREAD_ATTACH/DETACH. So we seem to be completely safe using | |
114 * straight Win32 API calls, rather than the much braindamaged RTL calls. | |
115 * | |
116 * _beginthread() in the RTLs call CloseHandle() just after the thread | |
117 * function returns, which means: 1) we have a race on our hands | |
118 * 2) it is impossible to implement join() semantics. | |
119 * | |
120 * IOW, do *NOT* turn on USE_RTL_THREAD_API! It is here | |
121 * for experimental purposes only. GSAR 98-01-02 | |
122 */ | |
123 #ifdef USE_RTL_THREAD_API | |
124 # include <process.h> | |
125 # if defined (_MSC_VER) | |
126 # define THREAD_RET_TYPE unsigned __stdcall | |
127 # define THREAD_RET_CAST(p) ((unsigned)(p)) | |
128 # else | |
129 /* CRTDLL.DLL doesn't allow a return value from thread function! */ | |
130 # define THREAD_RET_TYPE void __cdecl | |
131 # define THREAD_RET_CAST(p) ((void)(thr->i.retv = (void *)(p))) | |
132 # endif | |
133 #else /* !USE_RTL_THREAD_API */ | |
134 # define THREAD_RET_TYPE DWORD WINAPI | |
135 # define THREAD_RET_CAST(p) ((DWORD)(p)) | |
136 #endif /* !USE_RTL_THREAD_API */ | |
137 | |
138 typedef THREAD_RET_TYPE thread_func_t(void *); | |
139 | |
140 | |
141 START_EXTERN_C | |
142 | |
143 #if defined(PERLDLL) && defined(USE_DECLSPEC_THREAD) | |
144 extern __declspec(thread) void *PL_current_context; | |
145 #define PERL_SET_CONTEXT(t) (PL_current_context = t) | |
146 #define PERL_GET_CONTEXT PL_current_context | |
147 #else | |
148 #define PERL_GET_CONTEXT Perl_get_context() | |
149 #define PERL_SET_CONTEXT(t) Perl_set_context(t) | |
150 #endif | |
151 | |
152 END_EXTERN_C | |
153 | |
154 #define INIT_THREADS NOOP | |
155 #define ALLOC_THREAD_KEY \ | |
156 STMT_START { \ | |
157 if ((PL_thr_key = TlsAlloc()) == TLS_OUT_OF_INDEXES) { \ | |
158 PerlIO_printf(PerlIO_stderr(),"panic: TlsAlloc"); \ | |
159 exit(1); \ | |
160 } \ | |
161 } STMT_END | |
162 | |
163 #define FREE_THREAD_KEY \ | |
164 STMT_START { \ | |
165 TlsFree(PL_thr_key); \ | |
166 } STMT_END | |
167 | |
168 #define PTHREAD_ATFORK(prepare,parent,child) NOOP | |
169 | |
170 #if defined(USE_RTL_THREAD_API) && !defined(_MSC_VER) | |
171 #define JOIN(t, avp) \ | |
172 STMT_START { \ | |
173 if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \ | |
174 || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \ | |
175 || (CloseHandle((t)->self) == 0)) \ | |
176 Perl_croak_nocontext("panic: JOIN"); \ | |
177 *avp = (AV *)((t)->i.retv); \ | |
178 } STMT_END | |
179 #else /* !USE_RTL_THREAD_API || _MSC_VER */ | |
180 #define JOIN(t, avp) \ | |
181 STMT_START { \ | |
182 if ((WaitForSingleObject((t)->self,INFINITE) == WAIT_FAILED) \ | |
183 || (GetExitCodeThread((t)->self,(LPDWORD)(avp)) == 0) \ | |
184 || (CloseHandle((t)->self) == 0)) \ | |
185 Perl_croak_nocontext("panic: JOIN"); \ | |
186 } STMT_END | |
187 #endif /* !USE_RTL_THREAD_API || _MSC_VER */ | |
188 | |
189 #define YIELD Sleep(0) | |
190 | |
191 #endif /* _WIN32THREAD_H */ | |
192 |