852 lines
19 KiB
C++
852 lines
19 KiB
C++
/**
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* Thread.cpp
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004-2014 Null Team
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*
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* This software is distributed under multiple licenses;
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* see the COPYING file in the main directory for licensing
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* information for this specific distribution.
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*
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* This use of this software may be subject to additional restrictions.
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* See the LEGAL file in the main directory for details.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "yateclass.h"
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#include <string.h>
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#ifdef _WINDOWS
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#include <process.h>
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typedef unsigned long HTHREAD;
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#else
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#include <pthread.h>
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typedef pthread_t HTHREAD;
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#ifndef PTHREAD_EXPLICIT_SCHED
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#define PTHREAD_EXPLICIT_SCHED 0
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static int pthread_attr_setinheritsched(pthread_attr_t *,int) { return 0; }
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#endif
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#endif
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#ifdef HAVE_PRCTL
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#include <sys/prctl.h>
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#endif
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#ifndef PTHREAD_STACK_MIN
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#define PTHREAD_STACK_MIN 16384
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#else
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#ifndef PAGE_SIZE
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#define PAGE_SIZE 4096
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#endif
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#endif
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#ifndef THREAD_IDLE_MSEC
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#define THREAD_IDLE_MSEC 5
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#endif
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#define THREAD_IDLE_MIN 1
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#define THREAD_IDLE_MAX 20
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namespace TelEngine {
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class ThreadPrivate : public GenObject {
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friend class Thread;
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public:
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ThreadPrivate(Thread* t,const char* name);
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~ThreadPrivate();
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void run();
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bool cancel(bool hard);
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void cleanup();
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void destroy();
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void pubdestroy();
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static ThreadPrivate* create(Thread* t,const char* name,Thread::Priority prio);
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static void killall();
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static ThreadPrivate* current();
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Thread* m_thread;
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HTHREAD thread;
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NamedCounter* m_counter;
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bool m_running;
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bool m_started;
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bool m_updest;
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bool m_cancel;
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const char* m_name;
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#ifdef _WINDOWS
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static void startFunc(void* arg);
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#else
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static void* startFunc(void* arg);
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#endif
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static void cleanupFunc(void* arg);
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static void destroyFunc(void* arg);
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};
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};
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using namespace TelEngine;
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#define SOFT_WAITS 3
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#define HARD_KILLS 5
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#define KILL_WAIT 32
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#ifdef _WINDOWS
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#define TLS_MAGIC 0xfeeb1e
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static DWORD tls_index = TLS_MAGIC;
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static DWORD getTls()
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{
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// this seems unsafe but is not - allocation happens once before
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// any Thread is actually created
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if (tls_index == TLS_MAGIC)
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tls_index = ::TlsAlloc();
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if (tls_index == (DWORD)-1)
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// if it happened is REALLY BAD so better die quick and clean!
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abort();
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return tls_index;
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}
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#else /* _WINDOWS */
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static pthread_key_t current_key;
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class ThreadPrivateKeyAlloc
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{
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public:
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ThreadPrivateKeyAlloc()
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{
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if (::pthread_key_create(¤t_key,ThreadPrivate::destroyFunc)) {
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abortOnBug(true);
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Debug(DebugFail,"Failed to create current thread key!");
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}
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}
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};
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static ThreadPrivateKeyAlloc keyAllocator;
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#endif /* _WINDOWS */
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static TokenDict s_prio[] = {
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{ "lowest", Thread::Lowest },
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{ "low", Thread::Low },
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{ "normal", Thread::Normal },
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{ "high", Thread::High },
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{ "highest", Thread::Highest },
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{ 0, 0 }
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};
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static unsigned long s_idleMs = 1000 * THREAD_IDLE_MSEC;
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static ObjList s_threads;
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static Mutex s_tmutex(true,"Thread");
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static NamedCounter* s_counter = 0;
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ThreadPrivate* ThreadPrivate::create(Thread* t,const char* name,Thread::Priority prio)
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{
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ThreadPrivate *p = new ThreadPrivate(t,name);
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int e = 0;
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#ifndef _WINDOWS
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// Set a decent (256K) stack size that won't eat all virtual memory
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pthread_attr_t attr;
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::pthread_attr_init(&attr);
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::pthread_attr_setstacksize(&attr, 16*PTHREAD_STACK_MIN);
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if (prio > Thread::Normal) {
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struct sched_param param;
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param.sched_priority = 0;
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int policy = SCHED_OTHER;
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switch (prio) {
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case Thread::High:
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policy = SCHED_RR;
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param.sched_priority = 1;
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break;
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case Thread::Highest:
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policy = SCHED_FIFO;
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param.sched_priority = 99;
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break;
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default:
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break;
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}
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int err = ::pthread_attr_setinheritsched(&attr,PTHREAD_EXPLICIT_SCHED);
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if (!err)
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err = ::pthread_attr_setschedpolicy(&attr,policy);
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if (!err)
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err = ::pthread_attr_setschedparam(&attr,¶m);
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if (err)
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Debug(
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#ifdef DEBUG
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DebugWarn,
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#else
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DebugNote,
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#endif
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"Could not set thread scheduling parameters: %s (%d)",
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strerror(err),err);
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#ifdef XDEBUG
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else
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Debug(DebugInfo,"Successfully set high thread priority %d",prio);
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#endif
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}
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#endif /* _WINDOWS */
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for (int i=0; i<5; i++) {
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#ifdef _WINDOWS
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HTHREAD t = ::_beginthread(startFunc,16*PTHREAD_STACK_MIN,p);
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e = (t == (HTHREAD)-1) ? errno : 0;
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if (!e) {
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p->thread = t;
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int pr = THREAD_PRIORITY_NORMAL;
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switch (prio) {
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case Thread::Lowest:
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pr = THREAD_PRIORITY_LOWEST;
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break;
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case Thread::Low:
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pr = THREAD_PRIORITY_BELOW_NORMAL;
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break;
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case Thread::High:
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pr = THREAD_PRIORITY_ABOVE_NORMAL;
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break;
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case Thread::Highest:
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pr = THREAD_PRIORITY_HIGHEST;
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break;
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default:
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break;
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}
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if (pr != THREAD_PRIORITY_NORMAL)
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::SetThreadPriority(reinterpret_cast<HANDLE>(t),pr);
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}
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#else /* _WINDOWS */
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e = ::pthread_create(&p->thread,&attr,startFunc,p);
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#ifdef PTHREAD_INHERIT_SCHED
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if ((0 == i) && (EPERM == e) && (prio > Thread::Normal)) {
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Debug(DebugWarn,"Failed to create thread with priority %d, trying with inherited",prio);
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::pthread_attr_setinheritsched(&attr,PTHREAD_INHERIT_SCHED);
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e = EAGAIN;
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}
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#endif
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#endif /* _WINDOWS */
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if (e != EAGAIN)
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break;
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Thread::usleep(20);
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}
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#ifndef _WINDOWS
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::pthread_attr_destroy(&attr);
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#endif
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if (e) {
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Alarm("engine","system",DebugGoOn,"Error %d while creating pthread in '%s' [%p]",e,name,p);
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p->m_thread = 0;
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p->destroy();
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return 0;
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}
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p->m_running = true;
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return p;
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}
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ThreadPrivate::ThreadPrivate(Thread* t,const char* name)
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: m_thread(t), m_counter(0),
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m_running(false), m_started(false), m_updest(true), m_cancel(false), m_name(name)
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{
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#ifdef DEBUG
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Debugger debug("ThreadPrivate::ThreadPrivate","(%p,\"%s\") [%p]",t,name,this);
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#endif
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// Inherit object counter of creating thread
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m_counter = Thread::getCurrentObjCounter(true);
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Lock lock(s_tmutex);
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s_threads.append(this);
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}
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ThreadPrivate::~ThreadPrivate()
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{
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#ifdef DEBUG
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Debugger debug("ThreadPrivate::~ThreadPrivate()"," %p '%s' [%p]",m_thread,m_name,this);
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#endif
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m_running = false;
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Lock lock(s_tmutex);
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s_threads.remove(this,false);
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if (m_thread && m_updest) {
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Thread *t = m_thread;
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m_thread = 0;
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// let other threads access the list while we delete our upper layer
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lock.drop();
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delete t;
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}
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}
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void ThreadPrivate::destroy()
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{
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DDebug(DebugAll,"ThreadPrivate::destroy() '%s' [%p]",m_name,this);
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cleanup();
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delete this;
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}
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void ThreadPrivate::pubdestroy()
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{
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#ifdef DEBUG
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Debugger debug(DebugAll,"ThreadPrivate::pubdestroy()"," %p '%s' [%p]",m_thread,m_name,this);
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#endif
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m_updest = false;
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cleanup();
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m_thread = 0;
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if (current() == this) {
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cancel(true);
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// should never reach here...
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Debug(DebugFail,"ThreadPrivate::pubdestroy() past cancel??? [%p]",this);
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}
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else {
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cancel(false);
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// delay a little so thread has a chance to clean up
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for (int i=0; i<20; i++) {
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s_tmutex.lock();
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bool done = !s_threads.find(this);
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s_tmutex.unlock();
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if (done)
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return;
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Thread::idle(false);
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}
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if (m_cancel && !cancel(true))
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Debug(DebugWarn,"ThreadPrivate::pubdestroy() %p '%s' failed cancel [%p]",m_thread,m_name,this);
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}
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}
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void ThreadPrivate::run()
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{
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DDebug(DebugAll,"ThreadPrivate::run() '%s' [%p]",m_name,this);
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#ifdef _WINDOWS
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::TlsSetValue(getTls(),this);
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#else
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::pthread_setspecific(current_key,this);
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pthread_cleanup_push(cleanupFunc,this);
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#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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::pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS,0);
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#endif
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::pthread_detach(::pthread_self());
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#endif /* _WINDOWS */
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#ifdef HAVE_PRCTL
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#ifdef PR_SET_NAME
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if (m_name)
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prctl(PR_SET_NAME,(unsigned long)m_name,0,0,0);
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#endif
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#endif
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#ifdef _WINDOWS
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#ifndef NDEBUG
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if (m_name) {
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struct {
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DWORD dwType;
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LPCSTR szName;
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DWORD dwThreadID;
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DWORD dwFlags;
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} threadInfo;
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threadInfo.dwType = 0x1000;
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threadInfo.szName = m_name;
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threadInfo.dwThreadID = (DWORD)-1;
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threadInfo.dwFlags = 0;
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__try { RaiseException(0x406D1388, 0, sizeof(threadInfo)/sizeof(DWORD), (DWORD*)&threadInfo); }
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__except (EXCEPTION_CONTINUE_EXECUTION) { }
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}
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#endif
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#endif
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// FIXME: possible race if public object is destroyed during thread startup
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while (!m_started)
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Thread::usleep(10,true);
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if (m_thread)
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m_thread->run();
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#ifndef _WINDOWS
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pthread_cleanup_pop(1);
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#endif
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}
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bool ThreadPrivate::cancel(bool hard)
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{
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DDebug(DebugAll,"ThreadPrivate::cancel(%s) '%s' [%p]",String::boolText(hard),m_name,this);
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bool ret = true;
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if (m_running) {
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ret = false;
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if (hard) {
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bool critical = m_thread && m_thread->m_locking;
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if (critical) {
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// give the thread a chance to cancel without locking a mutex
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Debug(DebugMild,"Hard canceling '%s' while is taking a lock [%p]",m_name,this);
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m_cancel = true;
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for (int i = 0; i < 50; i++) {
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Thread::msleep(1);
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if (!m_running)
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return true;
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}
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}
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m_running = false;
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#ifdef _WINDOWS
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Debug(DebugGoOn,"ThreadPrivate '%s' terminating win32 thread %lu [%p]",
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m_name,thread,this);
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ret = ::TerminateThread(reinterpret_cast<HANDLE>(thread),0) != 0;
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#else
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#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
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Debug(critical ? DebugInfo : DebugWarn,"ThreadPrivate '%s' terminating pthread %p [%p]",
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m_name,&thread,this);
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ret = !::pthread_cancel(thread);
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#else
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Debug(DebugGoOn,"ThreadPrivate '%s' cannot terminate %p on this platform [%p]",
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m_name,&thread,this);
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#endif
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#endif /* _WINDOWS */
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if (ret) {
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// hard cancel succeeded - object is unsafe to touch any more
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Thread::msleep(1);
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return true;
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}
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// hard cancel failed - set back the running flag
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m_running = true;
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}
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m_cancel = true;
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}
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return ret;
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}
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void ThreadPrivate::cleanup()
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{
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DDebug(DebugAll,"ThreadPrivate::cleanup() %p '%s' [%p]",m_thread,m_name,this);
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if (m_thread && m_thread->m_private) {
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if (m_thread->m_private == this) {
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m_thread->m_private = 0;
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m_thread->cleanup();
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if (m_thread->locked())
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Alarm("engine","bug",DebugFail,"Thread '%s' destroyed with mutex locks (%d held) [%p]",m_name,m_thread->locks(),m_thread);
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}
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else {
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Alarm("engine","bug",DebugFail,"ThreadPrivate::cleanup() %p '%s' mismatching %p [%p]",m_thread,m_name,m_thread->m_private,this);
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m_thread = 0;
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}
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}
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}
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ThreadPrivate* ThreadPrivate::current()
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{
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#ifdef _WINDOWS
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return reinterpret_cast<ThreadPrivate *>(::TlsGetValue(getTls()));
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#else
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return reinterpret_cast<ThreadPrivate *>(::pthread_getspecific(current_key));
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#endif
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}
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void ThreadPrivate::killall()
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{
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Debugger debug("ThreadPrivate::killall()");
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ThreadPrivate *t;
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bool sledgehammer = false;
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s_tmutex.lock();
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ThreadPrivate* crt = ThreadPrivate::current();
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int c = s_threads.count();
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if (crt)
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Debug(DebugNote,"Thread '%s' is soft cancelling other %d running threads",crt->m_name,c-1);
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else
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Debug(DebugNote,"Soft cancelling %d running threads",c);
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ObjList* l = &s_threads;
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while (l && (t = static_cast<ThreadPrivate *>(l->get())) != 0)
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{
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if (t != crt) {
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Debug(DebugInfo,"Stopping ThreadPrivate '%s' [%p]",t->m_name,t);
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t->cancel(false);
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}
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l = l->next();
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}
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for (int w = 0; w < SOFT_WAITS; w++) {
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s_tmutex.unlock();
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Thread::idle();
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s_tmutex.lock();
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c = s_threads.count();
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// ignore the current thread if we have one
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if (crt && c)
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c--;
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if (!c) {
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s_tmutex.unlock();
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return;
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}
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}
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Debug(DebugMild,"Hard cancelling %d remaining threads",c);
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l = &s_threads;
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c = 1;
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while (l && (t = static_cast<ThreadPrivate *>(l->get())) != 0)
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{
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if (t == crt) {
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l = l->next();
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continue;
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}
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Debug(DebugInfo,"Trying to kill ThreadPrivate '%s' [%p], attempt %d",t->m_name,t,c);
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bool ok = t->cancel(true);
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if (ok) {
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int d = 0;
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// delay a little (exponentially) so threads have a chance to clean up
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for (int i=1; i<=KILL_WAIT; i<<=1) {
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s_tmutex.unlock();
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Thread::msleep(i-d);
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d = i;
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s_tmutex.lock();
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if (t != l->get())
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break;
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}
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}
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if (t != l->get())
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c = 1;
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else {
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if (ok) {
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#ifdef _WINDOWS
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Debug(DebugGoOn,"Could not kill %p but seems OK to delete it (library bug?)",t);
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s_tmutex.unlock();
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t->destroy();
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s_tmutex.lock();
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if (t != l->get())
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c = 1;
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#else
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Debug(DebugGoOn,"Could not kill cancelled %p so we'll abandon it (library bug?)",t);
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l->remove(t,false);
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c = 1;
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#endif
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continue;
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}
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Thread::msleep(1);
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if (++c >= HARD_KILLS) {
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Debug(DebugGoOn,"Could not kill %p, will use sledgehammer later.",t);
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sledgehammer = true;
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t->m_thread = 0;
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l = l->next();
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c = 1;
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}
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}
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}
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s_tmutex.unlock();
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// last solution - a REALLY BIG tool!
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// usually too big since many libraries have threads of their own...
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if (sledgehammer) {
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#ifdef THREAD_KILL
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Debug(DebugGoOn,"Brutally killing remaining threads!");
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::pthread_kill_other_threads_np();
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#else
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Debug(DebugGoOn,"Aargh! I cannot kill remaining threads on this platform!");
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#endif
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}
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}
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void ThreadPrivate::destroyFunc(void* arg)
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{
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#ifdef DEBUG
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Debugger debug("ThreadPrivate::destroyFunc","(%p)",arg);
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#endif
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ThreadPrivate *t = reinterpret_cast<ThreadPrivate *>(arg);
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if (t)
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t->destroy();
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}
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void ThreadPrivate::cleanupFunc(void* arg)
|
|
{
|
|
DDebug(DebugAll,"ThreadPrivate::cleanupFunc(%p)",arg);
|
|
ThreadPrivate *t = reinterpret_cast<ThreadPrivate *>(arg);
|
|
if (t)
|
|
t->cleanup();
|
|
}
|
|
|
|
#ifdef _WINDOWS
|
|
void ThreadPrivate::startFunc(void* arg)
|
|
#else
|
|
void* ThreadPrivate::startFunc(void* arg)
|
|
#endif
|
|
{
|
|
DDebug(DebugAll,"ThreadPrivate::startFunc(%p)",arg);
|
|
ThreadPrivate *t = reinterpret_cast<ThreadPrivate *>(arg);
|
|
t->run();
|
|
#ifdef _WINDOWS
|
|
t->m_running = false;
|
|
if (t->m_updest)
|
|
t->destroy();
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
Runnable::~Runnable()
|
|
{
|
|
}
|
|
|
|
Thread::Thread(const char* name, Priority prio)
|
|
: m_private(0), m_locks(0), m_locking(false)
|
|
{
|
|
#ifdef DEBUG
|
|
Debugger debug("Thread::Thread","(\"%s\",%d) [%p]",name,prio,this);
|
|
#endif
|
|
m_private = ThreadPrivate::create(this,name,prio);
|
|
}
|
|
|
|
Thread::Thread(const char *name, const char* prio)
|
|
: m_private(0), m_locks(0), m_locking(false)
|
|
{
|
|
#ifdef DEBUG
|
|
Debugger debug("Thread::Thread","(\"%s\",\"%s\") [%p]",name,prio,this);
|
|
#endif
|
|
m_private = ThreadPrivate::create(this,name,priority(prio));
|
|
}
|
|
|
|
Thread::~Thread()
|
|
{
|
|
DDebug(DebugAll,"Thread::~Thread() [%p]",this);
|
|
if (m_private)
|
|
m_private->pubdestroy();
|
|
}
|
|
|
|
bool Thread::error() const
|
|
{
|
|
return !m_private;
|
|
}
|
|
|
|
bool Thread::running() const
|
|
{
|
|
Lock lock(s_tmutex);
|
|
return m_private ? m_private->m_started : false;
|
|
}
|
|
|
|
const char* Thread::name() const
|
|
{
|
|
return m_private ? m_private->m_name : 0;
|
|
}
|
|
|
|
bool Thread::startup()
|
|
{
|
|
if (!m_private)
|
|
return false;
|
|
m_private->m_started = true;
|
|
return true;
|
|
}
|
|
|
|
Thread *Thread::current()
|
|
{
|
|
ThreadPrivate* t = ThreadPrivate::current();
|
|
return t ? t->m_thread : 0;
|
|
}
|
|
|
|
const char* Thread::currentName()
|
|
{
|
|
ThreadPrivate* t = ThreadPrivate::current();
|
|
return t ? t->m_name : 0;
|
|
}
|
|
|
|
NamedCounter* Thread::getObjCounter() const
|
|
{
|
|
return m_private ? m_private->m_counter : 0;
|
|
}
|
|
|
|
NamedCounter* Thread::setObjCounter(NamedCounter* counter)
|
|
{
|
|
if (!m_private)
|
|
return 0;
|
|
if (counter == m_private->m_counter)
|
|
return counter;
|
|
s_tmutex.lock();
|
|
NamedCounter* oldCounter = m_private->m_counter;
|
|
m_private->m_counter = counter;
|
|
s_tmutex.unlock();
|
|
return oldCounter;
|
|
}
|
|
|
|
NamedCounter* Thread::getCurrentObjCounter(bool always)
|
|
{
|
|
if (!(always || GenObject::getObjCounting()))
|
|
return 0;
|
|
ThreadPrivate* t = ThreadPrivate::current();
|
|
return t ? t->m_counter : s_counter;
|
|
}
|
|
|
|
NamedCounter* Thread::setCurrentObjCounter(NamedCounter* counter)
|
|
{
|
|
ThreadPrivate* t = ThreadPrivate::current();
|
|
NamedCounter*& c = t ? t->m_counter : s_counter;
|
|
if (counter == c)
|
|
return counter;
|
|
if (!t)
|
|
s_tmutex.lock();
|
|
NamedCounter* oldCounter = c;
|
|
c = counter;
|
|
if (!t)
|
|
s_tmutex.unlock();
|
|
return oldCounter;
|
|
}
|
|
|
|
int Thread::count()
|
|
{
|
|
Lock lock(s_tmutex);
|
|
return s_threads.count();
|
|
}
|
|
|
|
void Thread::cleanup()
|
|
{
|
|
DDebug(DebugAll,"Thread::cleanup() [%p]",this);
|
|
}
|
|
|
|
void Thread::killall()
|
|
{
|
|
ThreadPrivate::killall();
|
|
}
|
|
|
|
void Thread::exit()
|
|
{
|
|
DDebug(DebugAll,"Thread::exit()");
|
|
ThreadPrivate* t = ThreadPrivate::current();
|
|
if (t && t->m_thread && t->m_thread->locked())
|
|
Alarm("engine","bug",DebugFail,"Thread::exit() in '%s' with mutex locks (%d held) [%p]",
|
|
t->m_name,t->m_thread->locks(),t->m_thread);
|
|
#ifdef _WINDOWS
|
|
if (t) {
|
|
t->m_running = false;
|
|
t->destroy();
|
|
}
|
|
::_endthread();
|
|
#else
|
|
::pthread_exit(0);
|
|
#endif
|
|
}
|
|
|
|
bool Thread::check(bool exitNow)
|
|
{
|
|
ThreadPrivate* t = ThreadPrivate::current();
|
|
if (!(t && t->m_cancel))
|
|
return false;
|
|
if (exitNow)
|
|
exit();
|
|
return true;
|
|
}
|
|
|
|
void Thread::cancel(bool hard)
|
|
{
|
|
DDebug(DebugAll,"Thread::cancel() [%p]",this);
|
|
if (m_private)
|
|
m_private->cancel(hard);
|
|
}
|
|
|
|
void Thread::yield(bool exitCheck)
|
|
{
|
|
#ifdef _WINDOWS
|
|
// zero sleep is bad if we have high priority threads, they
|
|
// won't relinquish the timeslice for lower priority ones
|
|
::Sleep(1);
|
|
#else
|
|
::usleep(0);
|
|
#endif
|
|
if (exitCheck)
|
|
check();
|
|
}
|
|
|
|
void Thread::idle(bool exitCheck)
|
|
{
|
|
#ifdef DEBUG
|
|
const Thread* t = Thread::current();
|
|
if (t && t->locked())
|
|
Debug(DebugMild,"Thread '%s' idling with %d mutex locks held [%p]",
|
|
t->name(),t->locks(),t);
|
|
#endif
|
|
msleep(s_idleMs,exitCheck);
|
|
}
|
|
|
|
void Thread::sleep(unsigned int sec, bool exitCheck)
|
|
{
|
|
#ifdef _WINDOWS
|
|
::Sleep(sec*1000);
|
|
#else
|
|
::sleep(sec);
|
|
#endif
|
|
if (exitCheck)
|
|
check();
|
|
}
|
|
|
|
void Thread::msleep(unsigned long msec, bool exitCheck)
|
|
{
|
|
#ifdef _WINDOWS
|
|
::Sleep(msec);
|
|
#else
|
|
::usleep(msec*1000L);
|
|
#endif
|
|
if (exitCheck)
|
|
check();
|
|
}
|
|
|
|
void Thread::usleep(unsigned long usec, bool exitCheck)
|
|
{
|
|
#ifdef _WINDOWS
|
|
if (usec) {
|
|
usec = (usec + 500) / 1000;
|
|
if (!usec)
|
|
usec = 1;
|
|
}
|
|
::Sleep(usec);
|
|
#else
|
|
::usleep(usec);
|
|
#endif
|
|
if (exitCheck)
|
|
check();
|
|
}
|
|
|
|
unsigned long Thread::idleUsec()
|
|
{
|
|
return s_idleMs * 1000;
|
|
}
|
|
|
|
unsigned long Thread::idleMsec()
|
|
{
|
|
return s_idleMs;
|
|
}
|
|
|
|
void Thread::idleMsec(unsigned long msec)
|
|
{
|
|
if (msec == 0)
|
|
msec = THREAD_IDLE_MSEC;
|
|
else if (msec < THREAD_IDLE_MIN)
|
|
msec = THREAD_IDLE_MIN;
|
|
else if (msec > THREAD_IDLE_MAX)
|
|
msec = THREAD_IDLE_MAX;
|
|
s_idleMs = msec;
|
|
}
|
|
|
|
Thread::Priority Thread::priority(const char* name, Thread::Priority defvalue)
|
|
{
|
|
return (Thread::Priority)lookup(name,s_prio,defvalue);
|
|
}
|
|
|
|
const char* Thread::priority(Thread::Priority prio)
|
|
{
|
|
return lookup(prio,s_prio);
|
|
}
|
|
|
|
void Thread::preExec()
|
|
{
|
|
#ifdef THREAD_KILL
|
|
::pthread_kill_other_threads_np();
|
|
#endif
|
|
}
|
|
|
|
// Get the last thread error
|
|
int Thread::lastError()
|
|
{
|
|
#ifdef _WINDOWS
|
|
return ::GetLastError();
|
|
#else
|
|
return errno;
|
|
#endif
|
|
}
|
|
|
|
// Get an error string from system.
|
|
bool Thread::errorString(String& buffer, int code)
|
|
{
|
|
#ifdef _WINDOWS
|
|
LPTSTR buf = 0;
|
|
DWORD res = FormatMessageA(
|
|
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
|
|
NULL,code,0,(LPTSTR)&buf,0,0);
|
|
if (buf) {
|
|
if (res > 0)
|
|
buffer.assign(buf,res);
|
|
::LocalFree(buf);
|
|
}
|
|
#else
|
|
buffer = ::strerror(code);
|
|
#endif
|
|
if (buffer)
|
|
return true;
|
|
buffer << "Unknown error (code=" << code << ")";
|
|
return false;
|
|
}
|
|
|
|
/* vi: set ts=8 sw=4 sts=4 noet: */
|