1 mike 1.2 //%2006////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
4 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
5 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
6 // IBM Corp.; EMC Corporation, The Open Group.
7 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
8 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
9 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
10 // EMC Corporation; VERITAS Software Corporation; The Open Group.
11 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
12 // EMC Corporation; Symantec Corporation; The Open Group.
13 //
14 // Permission is hereby granted, free of charge, to any person obtaining a copy
15 // of this software and associated documentation files (the "Software"), to
16 // deal in the Software without restriction, including without limitation the
17 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
18 // sell copies of the Software, and to permit persons to whom the Software is
19 // furnished to do so, subject to the following conditions:
20 //
21 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
22 mike 1.2 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
23 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
24 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
25 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
26 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
27 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 //
30 //==============================================================================
31 //
32 // Author: Mike Brasher (m.brasher@inovadevelopment.com)
33 //
34 //%/////////////////////////////////////////////////////////////////////////////
35
36 #ifndef Pegasus_Threads_h
37 #define Pegasus_Threads_h
38
39 #include <cstring>
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40 mike 1.5 #include <cstdio>
41 #include <cstring>
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42 mike 1.2 #include <Pegasus/Common/Config.h>
43 #include <Pegasus/Common/Linkage.h>
44
45 // ATTN: can we consolidate these someplace?
46
47 #if defined(PEGASUS_HAVE_PTHREADS)
48 # if defined(PEGASUS_PLATFORM_OS400_ISERIES_IBM)
49 # define _MULTI_THREADED // Is this really necessary?
50 # endif
51 # include <pthread.h>
52 # include <errno.h>
53 # include <sys/time.h>
54 #elif defined(PEGASUS_HAVE_WINDOWS_THREADS)
55 # include <windows.h>
56 # include <process.h>
57 #else
58 # error "<Pegasus/Common/Threads.h>: not implemented"
59 #endif
60
61 PEGASUS_NAMESPACE_BEGIN
62
63 mike 1.2 //==============================================================================
64 //
65 // PEGASUS_THREAD_CDECL
66 //
67 //==============================================================================
68
69 #if defined(PEGASUS_PLATFORM_WIN32_IX86_MSVC)
70 # define PEGASUS_THREAD_CDECL __stdcall
71 #else
72 # define PEGASUS_THREAD_CDECL /* empty */
73 #endif
74
75 //==============================================================================
76 //
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77 mike 1.4 // ThreadId
78 //
79 //==============================================================================
80
81 struct ThreadId
82 {
83 // The character representation of a uint64 requires 22 bytes including the
84 // null terminator.
85 char buffer[22];
86 };
87
88 //==============================================================================
89 //
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90 mike 1.2 // ThreadType
91 //
92 //==============================================================================
93
94 #if defined(PEGASUS_HAVE_PTHREADS)
95 struct ThreadType
96 {
97 ThreadType()
98 {
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99 mike 1.3 memset(&thread, 0, sizeof(thread));
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100 mike 1.2 }
101
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102 mike 1.3 ThreadType(pthread_t thread_) : thread(thread_)
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103 mike 1.2 {
104 }
105
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106 mike 1.3 pthread_t thread;
107 };
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108 mike 1.2 #endif /* PEGASUS_HAVE_PTHREADS */
109
110 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
111 struct ThreadType
112 {
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113 mike 1.3 ThreadType() : handle(NULL)
114 {
115 }
116
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117 mike 1.2 HANDLE handle;
118 };
119 #endif /* PEGASUS_HAVE_WINDOWS_THREADS */
120
121 //==============================================================================
122 //
123 // ThreadReturnType
124 //
125 //==============================================================================
126
127 #if defined(PEGASUS_HAVE_PTHREADS)
128 typedef void* ThreadReturnType;
129 #endif
130
131 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
132 typedef unsigned ThreadReturnType;
133 #endif
134
135 //==============================================================================
136 //
137 // ThreadHandle
138 mike 1.2 //
139 //==============================================================================
140
141 #if defined(PEGASUS_HAVE_PTHREADS)
142 struct ThreadHandle
143 {
144 ThreadType thid;
145 };
146 #elif defined(PEGASUS_HAVE_WINDOWS_THREADS)
147 struct ThreadHandle
148 {
149 ThreadType thid;
150 };
151 #endif
152
153 //==============================================================================
154 //
155 // Threads
156 //
157 //==============================================================================
158
159 mike 1.2 class PEGASUS_COMMON_LINKAGE Threads
160 {
161 public:
162
163 enum Type { DETACHED, JOINABLE };
164
165 static int create(
166 ThreadType& thread,
167 Type type,
168 void* (*start)(void*),
169 void* arg);
170
171 static ThreadType self();
172
173 static bool equal(ThreadType x, ThreadType y);
174
175 static void exit(ThreadReturnType rc);
176
177 static void cancel(ThreadType th, ThreadReturnType rc);
178
179 static void yield();
180 mike 1.2
181 static void sleep(int msec);
182
183 static void cleanup_push(void (*start)(void*), void* arg);
184
185 static void cleanup_pop(int execute);
186
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187 mike 1.3 static ThreadId id(const ThreadType& x = Threads::self());
188
189 static bool null(const ThreadType& x = Threads::self());
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190 mike 1.2
191 static void clear(ThreadType& x);
192 };
193
194 //==============================================================================
195 //
196 // POSIX Threads Implementation
197 //
198 //==============================================================================
199
200 #if defined(PEGASUS_HAVE_PTHREADS)
201
202 inline bool Threads::equal(ThreadType x, ThreadType y)
203 {
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204 mike 1.3 return pthread_equal(x.thread, y.thread);
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205 mike 1.2 }
206
207 inline void Threads::exit(ThreadReturnType rc)
208 {
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209 marek 1.9 // NOTE: pthread_exit exhibits unusual behavior on RHEL 3 U2, as
210 // documented in Bugzilla 3836. Where feasible, it may be advantageous
211 // to avoid using this function.
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212 mike 1.2 pthread_exit(rc);
213 }
214
215 inline void Threads::cancel(ThreadType th, ThreadReturnType rc)
216 {
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217 mike 1.3 pthread_cancel(th.thread);
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218 mike 1.2 }
219
220 inline void Threads::yield()
221 {
222 #if defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) || \
223 defined(PEGASUS_PLATFORM_HPUX_ACC) || \
224 defined(PEGASUS_PLATFORM_OS400_ISERIES_IBM) || \
225 defined(PEGASUS_PLATFORM_TRU64_ALPHA_DECCXX) || \
226 defined(PEGASUS_OS_VMS) || \
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227 karl 1.8 defined(PEGASUS_OS_ZOS) || \
228 defined(PEGASUS_PLATFORM_DARWIN_PPC_GNU)
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229 mike 1.2 sched_yield();
230 #else
231 pthread_yield();
232 #endif
233 }
234
235 inline void Threads::cleanup_push(void (*func)(void*), void* arg)
236 {
237 // ATTN: it is doubtful whether cleanup handlers ever really worked.
238 // They are only used in two places and not used in many other
239 // places where mutexes are obtained. Further, they are only
240 // implemented correctly on one or two platforms. For now, we
241 // will defer their implementation until we can find a way to
242 // implement them on all platforms (using thread local storage).
243 }
244
245 inline void Threads::cleanup_pop(int execute)
246 {
247 // ATTN: not implemented.
248 }
249
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250 mike 1.3 inline ThreadId Threads::id(const ThreadType& x)
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251 mike 1.2 {
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252 mike 1.3 ThreadId tid;
253
254 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
255 const char* s = x.thread.__;
256 sprintf(tid.buffer, "%X%X%X%X%X%X%X%X",
257 s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7]);
258 #else
259 sprintf(tid.buffer, "%" PEGASUS_64BIT_CONVERSION_WIDTH "u",
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260 mike 1.6 Uint64(x.thread));
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261 mike 1.3 #endif
262
263 return tid;
264 }
265
266 inline bool Threads::null(const ThreadType& x)
267 {
268 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
269 Uint64 tmp;
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270 marek 1.7 memcpy(&tmp, x.thread.__, sizeof(Uint64));
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271 mike 1.3 return tmp == 0;
272 #else
273 return x.thread == 0;
274 #endif
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275 mike 1.2 }
276
277 inline void Threads::clear(ThreadType& x)
278 {
279 memset(&x, 0, sizeof(x));
280 }
281
282 #endif /* defined(PEGASUS_HAVE_PTHREADS) */
283
284 //==============================================================================
285 //
286 // Windows Threads Implementation
287 //
288 //==============================================================================
289
290 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
291
292 inline ThreadType Threads::self()
293 {
294 ThreadType tt;
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295 mike 1.5 tt.handle = GetCurrentThread();
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296 mike 1.2 return tt;
297 }
298
299 inline bool Threads::equal(ThreadType x, ThreadType y)
300 {
301 return x.handle == y.handle;
302 }
303
304 inline void Threads::exit(ThreadReturnType rc)
305 {
306 _endthreadex(rc);
307 }
308
309 inline void Threads::cancel(ThreadType th, ThreadReturnType rc)
310 {
311 TerminateThread(th.handle, rc);
312 }
313
314 inline void Threads::yield()
315 {
316 Sleep(0);
317 mike 1.2 }
318
319 inline void Threads::cleanup_push(void (*func)(void*), void* arg)
320 {
321 // ATTN: Not implemented on Windows.
322 }
323
324 inline void Threads::cleanup_pop(int execute)
325 {
326 // ATTN: Not implemented on Windows.
327 }
328
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329 mike 1.3 inline ThreadId Threads::id(const ThreadType& x)
330 {
331 ThreadId tmp;
332
333 sprintf(tmp.buffer, "%" PEGASUS_64BIT_CONVERSION_WIDTH "u",
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334 mike 1.5 Uint64(x.handle));
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335 mike 1.3
336 return tmp;
337 }
338
339 inline bool Threads::null(const ThreadType& x)
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340 mike 1.2 {
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341 mike 1.3 return x.handle == NULL;
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342 mike 1.2 }
343
344 inline void Threads::clear(ThreadType& x)
345 {
346 x.handle = NULL;
347 }
348
349 #endif /* defined(PEGASUS_HAVE_WINDOWS_THREADS) */
350
351 PEGASUS_NAMESPACE_END
352
353 #endif /* Pegasus_Threads_h */
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