thread-posix.cpp@ 37145

Last change on this file since 37145 was 36912, checked in by vboxsync, 14 years ago
gcc-4.6 -Werror=int-to-pointer-cast fixes
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1	/* $Id: thread-posix.cpp 36912 2011-05-02 14:23:01Z vboxsync $ */
2	/** @file
3	* IPRT - Threads, POSIX.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*******************************************************************************
29	* Header Files *
30	*******************************************************************************/
31	#define LOG_GROUP RTLOGGROUP_THREAD
32	#include <errno.h>
33	#include <pthread.h>
34	#include <signal.h>
35	#if defined(RT_OS_LINUX)
36	# include <unistd.h>
37	# include <sys/syscall.h>
38	#endif
39	#if defined(RT_OS_SOLARIS)
40	# include <sched.h>
41	# include <sys/resource.h>
42	#endif
43	#if defined(RT_OS_DARWIN)
44	# include <mach/thread_act.h>
45	# include <mach/thread_info.h>
46	# include <mach/host_info.h>
47	# include <mach/mach_init.h>
48	# include <mach/mach_host.h>
49	#endif
50
51	#include <iprt/thread.h>
52	#include <iprt/log.h>
53	#include <iprt/assert.h>
54	#include <iprt/asm.h>
55	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
56	# include <iprt/asm-amd64-x86.h>
57	#endif
58	#include <iprt/err.h>
59	#include <iprt/string.h>
60	#include "internal/thread.h"
61
62
63	/*******************************************************************************
64	* Defined Constants And Macros *
65	*******************************************************************************/
66	#ifndef IN_GUEST
67	/** Includes RTThreadPoke. */
68	# define RTTHREAD_POSIX_WITH_POKE
69	#endif
70
71
72	/*******************************************************************************
73	* Global Variables *
74	*******************************************************************************/
75	/** The pthread key in which we store the pointer to our own PRTTHREAD structure. */
76	static pthread_key_t g_SelfKey;
77	#ifdef RTTHREAD_POSIX_WITH_POKE
78	/** The signal we use for poking threads.
79	* This is set to -1 if no available signal was found. */
80	static int g_iSigPokeThread = -1;
81	#endif
82
83
84	/*******************************************************************************
85	* Internal Functions *
86	*******************************************************************************/
87	static void rtThreadNativeMain(void pvArgs);
88	static void rtThreadKeyDestruct(void *pvValue);
89	static void rtThreadPosixPokeSignal(int iSignal);
90
91
92	DECLHIDDEN(int) rtThreadNativeInit(void)
93	{
94	/*
95	* Allocate the TLS (key in posix terms) where we store the pointer to
96	* a threads RTTHREADINT structure.
97	*/
98	int rc = pthread_key_create(&g_SelfKey, rtThreadKeyDestruct);
99	if (rc)
100	return VERR_NO_TLS_FOR_SELF;
101
102	#ifdef RTTHREAD_POSIX_WITH_POKE
103	/*
104	* Try register the dummy signal handler for RTThreadPoke.
105	* Avoid SIGRTMIN thru SIGRTMIN+2 because of LinuxThreads.
106	*/
107	static const int s_aiSigCandidates[] =
108	{
109	# ifdef SIGRTMAX
110	SIGRTMAX-3,
111	SIGRTMAX-2,
112	SIGRTMAX-1,
113	# endif
114	# ifndef RT_OS_SOLARIS
115	SIGUSR2,
116	# endif
117	SIGWINCH
118	};
119
120	g_iSigPokeThread = -1;
121	for (unsigned iSig = 0; iSig < RT_ELEMENTS(s_aiSigCandidates); iSig++)
122	{
123	struct sigaction SigActOld;
124	if (!sigaction(s_aiSigCandidates[iSig], NULL, &SigActOld))
125	{
126	if ( SigActOld.sa_handler == SIG_DFL
127	\|\| SigActOld.sa_handler == rtThreadPosixPokeSignal)
128	{
129	struct sigaction SigAct;
130	RT_ZERO(SigAct);
131	SigAct.sa_handler = rtThreadPosixPokeSignal;
132	SigAct.sa_flags = 0;
133	sigfillset(&SigAct.sa_mask);
134
135	/* ASSUMES no sigaction race... (lazy bird) */
136	if (!sigaction(s_aiSigCandidates[iSig], &SigAct, NULL))
137	{
138	g_iSigPokeThread = s_aiSigCandidates[iSig];
139	break;
140	}
141	AssertMsgFailed(("rc=%Rrc errno=%d\n", RTErrConvertFromErrno(errno), errno));
142	}
143	}
144	else
145	AssertMsgFailed(("rc=%Rrc errno=%d\n", RTErrConvertFromErrno(errno), errno));
146	}
147	#endif /* RTTHREAD_POSIX_WITH_POKE */
148	return rc;
149	}
150
151
152	/**
153	* Destructor called when a thread terminates.
154	* @param pvValue The key value. PRTTHREAD in our case.
155	*/
156	static void rtThreadKeyDestruct(void *pvValue)
157	{
158	/*
159	* Deal with alien threads.
160	*/
161	PRTTHREADINT pThread = (PRTTHREADINT)pvValue;
162	if (pThread->fIntFlags & RTTHREADINT_FLAGS_ALIEN)
163	{
164	pthread_setspecific(g_SelfKey, pThread);
165	rtThreadTerminate(pThread, 0);
166	pthread_setspecific(g_SelfKey, NULL);
167	}
168	}
169
170
171	#ifdef RTTHREAD_POSIX_WITH_POKE
172	/**
173	* Dummy signal handler for the poke signal.
174	*
175	* @param iSignal The signal number.
176	*/
177	static void rtThreadPosixPokeSignal(int iSignal)
178	{
179	Assert(iSignal == g_iSigPokeThread);
180	NOREF(iSignal);
181	}
182	#endif
183
184
185	/**
186	* Adopts a thread, this is called immediately after allocating the
187	* thread structure.
188	*
189	* @param pThread Pointer to the thread structure.
190	*/
191	DECLHIDDEN(int) rtThreadNativeAdopt(PRTTHREADINT pThread)
192	{
193	/*
194	* Block SIGALRM - required for timer-posix.cpp.
195	* This is done to limit harm done by OSes which doesn't do special SIGALRM scheduling.
196	* It will not help much if someone creates threads directly using pthread_create. :/
197	*/
198	sigset_t SigSet;
199	sigemptyset(&SigSet);
200	sigaddset(&SigSet, SIGALRM);
201	sigprocmask(SIG_BLOCK, &SigSet, NULL);
202	#ifdef RTTHREAD_POSIX_WITH_POKE
203	if (g_iSigPokeThread != -1)
204	siginterrupt(g_iSigPokeThread, 1);
205	#endif
206
207	int rc = pthread_setspecific(g_SelfKey, pThread);
208	if (!rc)
209	return VINF_SUCCESS;
210	return VERR_FAILED_TO_SET_SELF_TLS;
211	}
212
213
214	DECLHIDDEN(void) rtThreadNativeDestroy(PRTTHREADINT pThread)
215	{
216	if (pThread == (PRTTHREADINT)pthread_getspecific(g_SelfKey))
217	pthread_setspecific(g_SelfKey, NULL);
218	}
219
220
221	/**
222	* Wrapper which unpacks the params and calls thread function.
223	*/
224	static void rtThreadNativeMain(void pvArgs)
225	{
226	PRTTHREADINT pThread = (PRTTHREADINT)pvArgs;
227
228	#if defined(RT_OS_LINUX)
229	/*
230	* Set the TID.
231	*/
232	pThread->tid = syscall(__NR_gettid);
233	ASMMemoryFence();
234	#endif
235
236	/*
237	* Block SIGALRM - required for timer-posix.cpp.
238	* This is done to limit harm done by OSes which doesn't do special SIGALRM scheduling.
239	* It will not help much if someone creates threads directly using pthread_create. :/
240	*/
241	sigset_t SigSet;
242	sigemptyset(&SigSet);
243	sigaddset(&SigSet, SIGALRM);
244	sigprocmask(SIG_BLOCK, &SigSet, NULL);
245	#ifdef RTTHREAD_POSIX_WITH_POKE
246	if (g_iSigPokeThread != -1)
247	siginterrupt(g_iSigPokeThread, 1);
248	#endif
249
250	int rc = pthread_setspecific(g_SelfKey, pThread);
251	AssertReleaseMsg(!rc, ("failed to set self TLS. rc=%d thread '%s'\n", rc, pThread->szName));
252
253	/*
254	* Call common main.
255	*/
256	pthread_t Self = pthread_self();
257	Assert((uintptr_t)Self == (RTNATIVETHREAD)Self && (uintptr_t)Self != NIL_RTNATIVETHREAD);
258	rc = rtThreadMain(pThread, (uintptr_t)Self, &pThread->szName[0]);
259
260	pthread_setspecific(g_SelfKey, NULL);
261	pthread_exit((void *)(intptr_t)rc);
262	return (void *)(intptr_t)rc;
263	}
264
265
266	DECLHIDDEN(int) rtThreadNativeCreate(PRTTHREADINT pThread, PRTNATIVETHREAD pNativeThread)
267	{
268	/*
269	* Set the default stack size.
270	*/
271	if (!pThread->cbStack)
272	pThread->cbStack = 512*1024;
273
274	#ifdef RT_OS_LINUX
275	pThread->tid = -1;
276	#endif
277
278	/*
279	* Setup thread attributes.
280	*/
281	pthread_attr_t ThreadAttr;
282	int rc = pthread_attr_init(&ThreadAttr);
283	if (!rc)
284	{
285	rc = pthread_attr_setdetachstate(&ThreadAttr, PTHREAD_CREATE_DETACHED);
286	if (!rc)
287	{
288	rc = pthread_attr_setstacksize(&ThreadAttr, pThread->cbStack);
289	if (!rc)
290	{
291	/*
292	* Create the thread.
293	*/
294	pthread_t ThreadId;
295	rc = pthread_create(&ThreadId, &ThreadAttr, rtThreadNativeMain, pThread);
296	if (!rc)
297	{
298	*pNativeThread = (uintptr_t)ThreadId;
299	return VINF_SUCCESS;
300	}
301	}
302	}
303	pthread_attr_destroy(&ThreadAttr);
304	}
305	return RTErrConvertFromErrno(rc);
306	}
307
308
309	RTDECL(RTTHREAD) RTThreadSelf(void)
310	{
311	PRTTHREADINT pThread = (PRTTHREADINT)pthread_getspecific(g_SelfKey);
312	/** @todo import alien threads? */
313	return pThread;
314	}
315
316
317	RTDECL(RTNATIVETHREAD) RTThreadNativeSelf(void)
318	{
319	return (RTNATIVETHREAD)pthread_self();
320	}
321
322
323	RTDECL(int) RTThreadSleep(RTMSINTERVAL cMillies)
324	{
325	LogFlow(("RTThreadSleep: cMillies=%d\n", cMillies));
326	if (!cMillies)
327	{
328	/* pthread_yield() isn't part of SuS, thus this fun. */
329	#ifdef RT_OS_DARWIN
330	pthread_yield_np();
331	#elif defined(RT_OS_FREEBSD) /* void pthread_yield */
332	pthread_yield();
333	#elif defined(RT_OS_SOLARIS)
334	sched_yield();
335	#else
336	if (!pthread_yield())
337	#endif
338	{
339	LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
340	return VINF_SUCCESS;
341	}
342	}
343	else
344	{
345	struct timespec ts;
346	struct timespec tsrem = {0,0};
347
348	ts.tv_nsec = (cMillies % 1000) * 1000000;
349	ts.tv_sec = cMillies / 1000;
350	if (!nanosleep(&ts, &tsrem))
351	{
352	LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
353	return VINF_SUCCESS;
354	}
355	}
356
357	int rc = RTErrConvertFromErrno(errno);
358	LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", rc, cMillies));
359	return rc;
360	}
361
362
363	RTDECL(bool) RTThreadYield(void)
364	{
365	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
366	uint64_t u64TS = ASMReadTSC();
367	#endif
368	#ifdef RT_OS_DARWIN
369	pthread_yield_np();
370	#elif defined(RT_OS_SOLARIS)
371	sched_yield();
372	#else
373	pthread_yield();
374	#endif
375	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
376	u64TS = ASMReadTSC() - u64TS;
377	bool fRc = u64TS > 1500;
378	LogFlow(("RTThreadYield: returning %d (%llu ticks)\n", fRc, u64TS));
379	#else
380	bool fRc = true; /* PORTME: Add heuristics for determining whether the cpus was yielded. */
381	#endif
382	return fRc;
383	}
384
385
386	RTR3DECL(uint64_t) RTThreadGetAffinity(void)
387	{
388	return 1;
389	}
390
391
392	RTR3DECL(int) RTThreadSetAffinity(uint64_t u64Mask)
393	{
394	if (u64Mask != 1)
395	return VERR_INVALID_PARAMETER;
396	return VINF_SUCCESS;
397	}
398
399
400	#ifdef RTTHREAD_POSIX_WITH_POKE
401	RTDECL(int) RTThreadPoke(RTTHREAD hThread)
402	{
403	AssertReturn(hThread != RTThreadSelf(), VERR_INVALID_PARAMETER);
404	PRTTHREADINT pThread = rtThreadGet(hThread);
405	AssertReturn(pThread, VERR_INVALID_HANDLE);
406
407	int rc;
408	if (g_iSigPokeThread != -1)
409	{
410	rc = pthread_kill((pthread_t)(uintptr_t)pThread->Core.Key, g_iSigPokeThread);
411	rc = RTErrConvertFromErrno(rc);
412	}
413	else
414	rc = VERR_NOT_SUPPORTED;
415
416	rtThreadRelease(pThread);
417	return rc;
418	}
419	#endif
420
421	/** @todo move this into platform specific files. */
422	RTR3DECL(int) RTThreadGetExecutionTimeMilli(uint64_t pKernelTime, uint64_t pUserTime)
423	{
424	#if defined(RT_OS_SOLARIS)
425	struct rusage ts;
426	int rc = getrusage(RUSAGE_LWP, &ts);
427	if (rc)
428	return RTErrConvertFromErrno(rc);
429
430	pKernelTime = ts.ru_stime.tv_sec 1000 + ts.ru_stime.tv_usec / 1000;
431	pUserTime = ts.ru_utime.tv_sec 1000 + ts.ru_utime.tv_usec / 1000;
432	return VINF_SUCCESS;
433
434	#elif defined(RT_OS_LINUX) \|\| defined(RT_OS_FREEBSD)
435	/* on Linux, getrusage(RUSAGE_THREAD, ...) is available since 2.6.26 */
436	struct timespec ts;
437	int rc = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
438	if (rc)
439	return RTErrConvertFromErrno(rc);
440
441	*pKernelTime = 0;
442	pUserTime = (uint64_t)ts.tv_sec 1000 + ts.tv_nsec / 1000000;
443	return VINF_SUCCESS;
444
445	#elif defined(RT_OS_DARWIN)
446	thread_basic_info ThreadInfo;
447	mach_msg_type_number_t Count = THREAD_BASIC_INFO_COUNT;
448	kern_return_t krc = thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)&ThreadInfo, &Count);
449	AssertReturn(krc == KERN_SUCCESS, RTErrConvertFromDarwinKern(krc));
450
451	pKernelTime = ThreadInfo.system_time.seconds 1000 + ThreadInfo.system_time.microseconds / 1000;
452	pUserTime = ThreadInfo.user_time.seconds 1000 + ThreadInfo.user_time.microseconds / 1000;
453
454	return VINF_SUCCESS;
455	#else
456	return VERR_NOT_IMPLEMENTED;
457	#endif
458	}
459

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source: vbox/trunk/src/VBox/Runtime/r3/posix/thread-posix.cpp@ 37145

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