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 //%/////////////////////////////////////////////////////////////////////////////
33
34 #ifndef Pegasus_Threads_h
35 #define Pegasus_Threads_h
36
37 #include <cstring>
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38 mike 1.5 #include <cstdio>
39 #include <cstring>
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40 mike 1.2 #include <Pegasus/Common/Config.h>
41 #include <Pegasus/Common/Linkage.h>
42
43 // ATTN: can we consolidate these someplace?
44
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45 marek 1.15 #ifdef PEGASUS_OS_ZOS
46 # include <sched.h>
47 #endif
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48 mike 1.2 #if defined(PEGASUS_HAVE_PTHREADS)
49 # include <pthread.h>
50 # include <errno.h>
51 # include <sys/time.h>
52 #elif defined(PEGASUS_HAVE_WINDOWS_THREADS)
53 # include <windows.h>
54 # include <process.h>
55 #else
56 # error "<Pegasus/Common/Threads.h>: not implemented"
57 #endif
58
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59 karl 1.17 #if defined(PEGASUS_OS_SOLARIS)
60 # include <string.h>
61 # include <stdio.h>
62 #endif
63
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64 mike 1.2 PEGASUS_NAMESPACE_BEGIN
65
66 //==============================================================================
67 //
68 // PEGASUS_THREAD_CDECL
69 //
70 //==============================================================================
71
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72 a.dunfey 1.12 #if defined(PEGASUS_OS_TYPE_WINDOWS)
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73 mike 1.2 # define PEGASUS_THREAD_CDECL __stdcall
74 #else
75 # define PEGASUS_THREAD_CDECL /* empty */
76 #endif
77
78 //==============================================================================
79 //
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80 mike 1.4 // ThreadId
81 //
82 //==============================================================================
83
84 struct ThreadId
85 {
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86 kumpf 1.10 // The character representation of a uint64 requires 22 bytes including the
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87 mike 1.4 // null terminator.
88 char buffer[22];
89 };
90
91 //==============================================================================
92 //
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93 mike 1.2 // ThreadType
94 //
95 //==============================================================================
96
97 #if defined(PEGASUS_HAVE_PTHREADS)
98 struct ThreadType
99 {
100 ThreadType()
101 {
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102 mike 1.3 memset(&thread, 0, sizeof(thread));
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103 mike 1.2 }
104
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105 mike 1.3 ThreadType(pthread_t thread_) : thread(thread_)
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106 mike 1.2 {
107 }
108
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109 mike 1.3 pthread_t thread;
110 };
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111 mike 1.2 #endif /* PEGASUS_HAVE_PTHREADS */
112
113 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
114 struct ThreadType
115 {
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116 kumpf 1.10 ThreadType() : handle(NULL)
117 {
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118 mike 1.3 }
119
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120 mike 1.2 HANDLE handle;
121 };
122 #endif /* PEGASUS_HAVE_WINDOWS_THREADS */
123
124 //==============================================================================
125 //
126 // ThreadReturnType
127 //
128 //==============================================================================
129
130 #if defined(PEGASUS_HAVE_PTHREADS)
131 typedef void* ThreadReturnType;
132 #endif
133
134 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
135 typedef unsigned ThreadReturnType;
136 #endif
137
138 //==============================================================================
139 //
140 // ThreadHandle
141 mike 1.2 //
142 //==============================================================================
143
144 #if defined(PEGASUS_HAVE_PTHREADS)
145 struct ThreadHandle
146 {
147 ThreadType thid;
148 };
149 #elif defined(PEGASUS_HAVE_WINDOWS_THREADS)
150 struct ThreadHandle
151 {
152 ThreadType thid;
153 };
154 #endif
155
156 //==============================================================================
157 //
158 // Threads
159 //
160 //==============================================================================
161
162 mike 1.2 class PEGASUS_COMMON_LINKAGE Threads
163 {
164 public:
165
166 enum Type { DETACHED, JOINABLE };
167
168 static int create(
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169 kumpf 1.10 ThreadType& thread,
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170 mike 1.2 Type type,
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171 kumpf 1.10 void* (*start)(void*),
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172 mike 1.2 void* arg);
173
174 static ThreadType self();
175
176 static bool equal(ThreadType x, ThreadType y);
177
178 static void exit(ThreadReturnType rc);
179
180 static void cancel(ThreadType th, ThreadReturnType rc);
181
182 static void yield();
183
184 static void sleep(int msec);
185
186 static void cleanup_push(void (*start)(void*), void* arg);
187
188 static void cleanup_pop(int execute);
189
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190 mike 1.3 static ThreadId id(const ThreadType& x = Threads::self());
191
192 static bool null(const ThreadType& x = Threads::self());
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193 mike 1.2
194 static void clear(ThreadType& x);
195 };
196
197 //==============================================================================
198 //
199 // POSIX Threads Implementation
200 //
201 //==============================================================================
202
203 #if defined(PEGASUS_HAVE_PTHREADS)
204
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205 kumpf 1.10 inline bool Threads::equal(ThreadType x, ThreadType y)
206 {
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207 mike 1.3 return pthread_equal(x.thread, y.thread);
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208 mike 1.2 }
209
210 inline void Threads::exit(ThreadReturnType rc)
211 {
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212 marek 1.9 // NOTE: pthread_exit exhibits unusual behavior on RHEL 3 U2, as
213 // documented in Bugzilla 3836. Where feasible, it may be advantageous
214 // to avoid using this function.
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215 mike 1.2 pthread_exit(rc);
216 }
217
218 inline void Threads::cancel(ThreadType th, ThreadReturnType rc)
219 {
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220 mike 1.3 pthread_cancel(th.thread);
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221 mike 1.2 }
222
223 inline void Threads::yield()
224 {
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225 marek 1.16 #ifdef PEGASUS_OS_LINUX
226 pthread_yield();
227 #else
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228 mike 1.2 sched_yield();
229 #endif
230 }
231
232 inline void Threads::cleanup_push(void (*func)(void*), void* arg)
233 {
234 // ATTN: it is doubtful whether cleanup handlers ever really worked.
235 // They are only used in two places and not used in many other
236 // places where mutexes are obtained. Further, they are only
237 // implemented correctly on one or two platforms. For now, we
238 // will defer their implementation until we can find a way to
239 // implement them on all platforms (using thread local storage).
240 }
241
242 inline void Threads::cleanup_pop(int execute)
243 {
244 // ATTN: not implemented.
245 }
246
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247 mike 1.3 inline ThreadId Threads::id(const ThreadType& x)
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248 mike 1.2 {
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249 karl 1.17 ThreadId tid = { { 0 } };
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250 mike 1.3
251 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
252 const char* s = x.thread.__;
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253 kumpf 1.10 sprintf(tid.buffer, "%X%X%X%X%X%X%X%X",
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254 mike 1.3 s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7]);
255 #else
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256 kumpf 1.10 sprintf(tid.buffer, "%" PEGASUS_64BIT_CONVERSION_WIDTH "u",
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257 mike 1.6 Uint64(x.thread));
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258 mike 1.3 #endif
259
260 return tid;
261 }
262
263 inline bool Threads::null(const ThreadType& x)
264 {
265 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
266 Uint64 tmp;
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267 marek 1.7 memcpy(&tmp, x.thread.__, sizeof(Uint64));
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268 mike 1.3 return tmp == 0;
269 #else
270 return x.thread == 0;
271 #endif
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272 mike 1.2 }
273
274 inline void Threads::clear(ThreadType& x)
275 {
276 memset(&x, 0, sizeof(x));
277 }
278
279 #endif /* defined(PEGASUS_HAVE_PTHREADS) */
280
281 //==============================================================================
282 //
283 // Windows Threads Implementation
284 //
285 //==============================================================================
286
287 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
288
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289 kumpf 1.10 inline ThreadType Threads::self()
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290 mike 1.2 {
291 ThreadType tt;
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292 mike 1.5 tt.handle = GetCurrentThread();
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293 mike 1.2 return tt;
294 }
295
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296 kumpf 1.10 inline bool Threads::equal(ThreadType x, ThreadType y)
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297 mike 1.2 {
298 return x.handle == y.handle;
299 }
300
301 inline void Threads::exit(ThreadReturnType rc)
302 {
303 _endthreadex(rc);
304 }
305
306 inline void Threads::cancel(ThreadType th, ThreadReturnType rc)
307 {
308 TerminateThread(th.handle, rc);
309 }
310
311 inline void Threads::yield()
312 {
313 Sleep(0);
314 }
315
316 inline void Threads::cleanup_push(void (*func)(void*), void* arg)
317 {
318 mike 1.2 // ATTN: Not implemented on Windows.
319 }
320
321 inline void Threads::cleanup_pop(int execute)
322 {
323 // ATTN: Not implemented on Windows.
324 }
325
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326 mike 1.3 inline ThreadId Threads::id(const ThreadType& x)
327 {
328 ThreadId tmp;
329
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330 kumpf 1.10 sprintf(tmp.buffer, "%" PEGASUS_64BIT_CONVERSION_WIDTH "u",
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331 mike 1.5 Uint64(x.handle));
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332 mike 1.3
333 return tmp;
334 }
335
336 inline bool Threads::null(const ThreadType& x)
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337 mike 1.2 {
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338 mike 1.3 return x.handle == NULL;
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339 mike 1.2 }
340
341 inline void Threads::clear(ThreadType& x)
342 {
343 x.handle = NULL;
344 }
345
346 #endif /* defined(PEGASUS_HAVE_WINDOWS_THREADS) */
347
348 PEGASUS_NAMESPACE_END
349
350 #endif /* Pegasus_Threads_h */
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