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
45 #if defined(PEGASUS_HAVE_PTHREADS)
46 # if defined(PEGASUS_PLATFORM_OS400_ISERIES_IBM)
47 # define _MULTI_THREADED // Is this really necessary?
48 # endif
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
59 PEGASUS_NAMESPACE_BEGIN
60
61 mike 1.2 //==============================================================================
62 //
63 // PEGASUS_THREAD_CDECL
64 //
65 //==============================================================================
66
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67 a.dunfey 1.12 #if defined(PEGASUS_OS_TYPE_WINDOWS)
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68 mike 1.2 # define PEGASUS_THREAD_CDECL __stdcall
69 #else
70 # define PEGASUS_THREAD_CDECL /* empty */
71 #endif
72
73 //==============================================================================
74 //
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75 mike 1.4 // ThreadId
76 //
77 //==============================================================================
78
79 struct ThreadId
80 {
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81 kumpf 1.10 // The character representation of a uint64 requires 22 bytes including the
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82 mike 1.4 // null terminator.
83 char buffer[22];
84 };
85
86 //==============================================================================
87 //
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88 mike 1.2 // ThreadType
89 //
90 //==============================================================================
91
92 #if defined(PEGASUS_HAVE_PTHREADS)
93 struct ThreadType
94 {
95 ThreadType()
96 {
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97 mike 1.3 memset(&thread, 0, sizeof(thread));
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98 mike 1.2 }
99
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100 mike 1.3 ThreadType(pthread_t thread_) : thread(thread_)
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101 mike 1.2 {
102 }
103
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104 mike 1.3 pthread_t thread;
105 };
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106 mike 1.2 #endif /* PEGASUS_HAVE_PTHREADS */
107
108 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
109 struct ThreadType
110 {
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111 kumpf 1.10 ThreadType() : handle(NULL)
112 {
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113 mike 1.3 }
114
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115 mike 1.2 HANDLE handle;
116 };
117 #endif /* PEGASUS_HAVE_WINDOWS_THREADS */
118
119 //==============================================================================
120 //
121 // ThreadReturnType
122 //
123 //==============================================================================
124
125 #if defined(PEGASUS_HAVE_PTHREADS)
126 typedef void* ThreadReturnType;
127 #endif
128
129 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
130 typedef unsigned ThreadReturnType;
131 #endif
132
133 //==============================================================================
134 //
135 // ThreadHandle
136 mike 1.2 //
137 //==============================================================================
138
139 #if defined(PEGASUS_HAVE_PTHREADS)
140 struct ThreadHandle
141 {
142 ThreadType thid;
143 };
144 #elif defined(PEGASUS_HAVE_WINDOWS_THREADS)
145 struct ThreadHandle
146 {
147 ThreadType thid;
148 };
149 #endif
150
151 //==============================================================================
152 //
153 // Threads
154 //
155 //==============================================================================
156
157 mike 1.2 class PEGASUS_COMMON_LINKAGE Threads
158 {
159 public:
160
161 enum Type { DETACHED, JOINABLE };
162
163 static int create(
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164 kumpf 1.10 ThreadType& thread,
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165 mike 1.2 Type type,
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166 kumpf 1.10 void* (*start)(void*),
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167 mike 1.2 void* arg);
168
169 static ThreadType self();
170
171 static bool equal(ThreadType x, ThreadType y);
172
173 static void exit(ThreadReturnType rc);
174
175 static void cancel(ThreadType th, ThreadReturnType rc);
176
177 static void yield();
178
179 static void sleep(int msec);
180
181 static void cleanup_push(void (*start)(void*), void* arg);
182
183 static void cleanup_pop(int execute);
184
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185 mike 1.3 static ThreadId id(const ThreadType& x = Threads::self());
186
187 static bool null(const ThreadType& x = Threads::self());
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188 mike 1.2
189 static void clear(ThreadType& x);
190 };
191
192 //==============================================================================
193 //
194 // POSIX Threads Implementation
195 //
196 //==============================================================================
197
198 #if defined(PEGASUS_HAVE_PTHREADS)
199
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200 kumpf 1.10 inline bool Threads::equal(ThreadType x, ThreadType y)
201 {
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202 mike 1.3 return pthread_equal(x.thread, y.thread);
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203 mike 1.2 }
204
205 inline void Threads::exit(ThreadReturnType rc)
206 {
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207 marek 1.9 // NOTE: pthread_exit exhibits unusual behavior on RHEL 3 U2, as
208 // documented in Bugzilla 3836. Where feasible, it may be advantageous
209 // to avoid using this function.
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210 mike 1.2 pthread_exit(rc);
211 }
212
213 inline void Threads::cancel(ThreadType th, ThreadReturnType rc)
214 {
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215 mike 1.3 pthread_cancel(th.thread);
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216 mike 1.2 }
217
218 inline void Threads::yield()
219 {
220 #if defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) || \
221 defined(PEGASUS_PLATFORM_HPUX_ACC) || \
222 defined(PEGASUS_PLATFORM_OS400_ISERIES_IBM) || \
223 defined(PEGASUS_PLATFORM_TRU64_ALPHA_DECCXX) || \
224 defined(PEGASUS_OS_VMS) || \
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225 karl 1.8 defined(PEGASUS_OS_ZOS) || \
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226 mike 1.11 defined(PEGASUS_OS_DARWIN)
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227 mike 1.2 sched_yield();
228 #else
229 pthread_yield();
230 #endif
231 }
232
233 inline void Threads::cleanup_push(void (*func)(void*), void* arg)
234 {
235 // ATTN: it is doubtful whether cleanup handlers ever really worked.
236 // They are only used in two places and not used in many other
237 // places where mutexes are obtained. Further, they are only
238 // implemented correctly on one or two platforms. For now, we
239 // will defer their implementation until we can find a way to
240 // implement them on all platforms (using thread local storage).
241 }
242
243 inline void Threads::cleanup_pop(int execute)
244 {
245 // ATTN: not implemented.
246 }
247
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248 mike 1.3 inline ThreadId Threads::id(const ThreadType& x)
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249 mike 1.2 {
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250 mike 1.3 ThreadId tid;
251
252 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
253 const char* s = x.thread.__;
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254 kumpf 1.10 sprintf(tid.buffer, "%X%X%X%X%X%X%X%X",
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255 mike 1.3 s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7]);
256 #else
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257 kumpf 1.10 sprintf(tid.buffer, "%" PEGASUS_64BIT_CONVERSION_WIDTH "u",
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258 mike 1.6 Uint64(x.thread));
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259 mike 1.3 #endif
260
261 return tid;
262 }
263
264 inline bool Threads::null(const ThreadType& x)
265 {
266 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
267 Uint64 tmp;
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268 marek 1.7 memcpy(&tmp, x.thread.__, sizeof(Uint64));
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269 mike 1.3 return tmp == 0;
270 #else
271 return x.thread == 0;
272 #endif
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273 mike 1.2 }
274
275 inline void Threads::clear(ThreadType& x)
276 {
277 memset(&x, 0, sizeof(x));
278 }
279
280 #endif /* defined(PEGASUS_HAVE_PTHREADS) */
281
282 //==============================================================================
283 //
284 // Windows Threads Implementation
285 //
286 //==============================================================================
287
288 #if defined(PEGASUS_HAVE_WINDOWS_THREADS)
289
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290 kumpf 1.10 inline ThreadType Threads::self()
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291 mike 1.2 {
292 ThreadType tt;
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293 mike 1.5 tt.handle = GetCurrentThread();
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294 mike 1.2 return tt;
295 }
296
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297 kumpf 1.10 inline bool Threads::equal(ThreadType x, ThreadType y)
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298 mike 1.2 {
299 return x.handle == y.handle;
300 }
301
302 inline void Threads::exit(ThreadReturnType rc)
303 {
304 _endthreadex(rc);
305 }
306
307 inline void Threads::cancel(ThreadType th, ThreadReturnType rc)
308 {
309 TerminateThread(th.handle, rc);
310 }
311
312 inline void Threads::yield()
313 {
314 Sleep(0);
315 }
316
317 inline void Threads::cleanup_push(void (*func)(void*), void* arg)
318 {
319 mike 1.2 // ATTN: Not implemented on Windows.
320 }
321
322 inline void Threads::cleanup_pop(int execute)
323 {
324 // ATTN: Not implemented on Windows.
325 }
326
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327 mike 1.3 inline ThreadId Threads::id(const ThreadType& x)
328 {
329 ThreadId tmp;
330
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331 kumpf 1.10 sprintf(tmp.buffer, "%" PEGASUS_64BIT_CONVERSION_WIDTH "u",
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332 mike 1.5 Uint64(x.handle));
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333 mike 1.3
334 return tmp;
335 }
336
337 inline bool Threads::null(const ThreadType& x)
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338 mike 1.2 {
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339 mike 1.3 return x.handle == NULL;
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340 mike 1.2 }
341
342 inline void Threads::clear(ThreadType& x)
343 {
344 x.handle = NULL;
345 }
346
347 #endif /* defined(PEGASUS_HAVE_WINDOWS_THREADS) */
348
349 PEGASUS_NAMESPACE_END
350
351 #endif /* Pegasus_Threads_h */
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