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Diff for /pegasus/src/Pegasus/Common/Thread.cpp between version 1.1.2.13 and 1.91

version 1.1.2.13, 2001/11/12 16:52:57

version 1.91, 2006/08/09 21:12:42

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//%2006////////////////////////////////////////////////////////////////////////

//%/////////////////////////////////////////////////////////////////////////////

// Compaq Computer Corporation

// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.

// IBM Corp.; EMC Corporation, The Open Group.

// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.

// EMC Corporation; VERITAS Software Corporation; The Open Group.

// EMC Corporation; Symantec Corporation; The Open Group.

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to

Line 26

Line 33

// Modified By: Rudy Schuet (rudy.schuet@compaq.com) 11/12/01

// added nsk platform support

// Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)

// Amit K Arora, IBM (amita@in.ibm.com) for PEP#101

// Sean Keenan, Hewlett-Packard Company (sean.keenan@hp.com)

// David Dillard, VERITAS Software Corp.

// (david.dillard@veritas.com)

//%/////////////////////////////////////////////////////////////////////////////

#include "Thread.h"

#include <Pegasus/Common/IPC.h>

#include <exception>

#include <Pegasus/Common/Tracer.h>

#include "Time.h"

#if defined(PEGASUS_OS_TYPE_WINDOWS)

PEGASUS_USING_STD;

# include "ThreadWindows.cpp"

#elif defined(PEGASUS_OS_TYPE_UNIX)

# include "ThreadUnix.cpp"

#elif defined(PEGASUS_OS_TYPE_NSK)

# include "ThreadNsk.cpp"

#else

# error "Unsupported platform"

#endif

PEGASUS_NAMESPACE_BEGIN

void thread_data::default_delete(void * data)

//==============================================================================

// POSIX Threads Implementation:

//==============================================================================

#if defined(PEGASUS_HAVE_PTHREADS)

struct StartWrapperArg

{

if( data != NULL)

void *(PEGASUS_THREAD_CDECL * start) (void *);

::operator delete(data);

void *arg;

};

extern "C" void *_start_wrapper(void *arg_)

{

StartWrapperArg *arg = (StartWrapperArg *) arg_;

void *return_value = (*arg->start) (arg->arg);

delete arg;

return return_value;

}

Boolean Thread::_signals_blocked = false;

void Thread::cancel()

{

_cancelled = true;

pthread_cancel(_handle.thid.tt_handle());

}

// for non-native implementations

void Thread::test_cancel()

#ifndef PEGASUS_THREAD_CLEANUP_NATIVE

void Thread::cleanup_push( void (*routine)(void *), void *parm) throw(IPCException)

{

cleanup_handler *cu = new cleanup_handler(routine, parm);

#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)

try

pthread_testintr();

#else

pthread_testcancel();

#endif

}

Boolean Thread::is_cancelled(void)

{

_cleanup.insert_first(cu);

return _cancelled;

}

catch(IPCException& e)

void Thread::thread_switch()

{

delete cu;

#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)

throw;

pthread_yield(NULL);

#else

sched_yield();

#endif

}

return;

ATTN: why are these missing on other platforms?

#if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU)

void Thread::suspend()

{

pthread_kill(_handle.thid.tt_handle(), SIGSTOP);

}

void Thread::cleanup_pop(Boolean execute) throw(IPCException)

void Thread::resume()

{

cleanup_handler *cu ;

pthread_kill(_handle.thid.tt_handle(), SIGCONT);

try

}

#endif

void Thread::sleep(Uint32 msec)

{

cu = _cleanup.remove_first() ;

Threads::sleep(msec);

}

catch(IPCException& e)

void Thread::join(void)

{

PEGASUS_ASSERT(0);

if (!_is_detached && Threads::id(_handle.thid) != 0)

pthread_join(_handle.thid.tt_handle(), &_exit_code);

Threads::clear(_handle.thid);

}

if(execute == true)

cu->execute();

void Thread::thread_init(void)

delete cu;

{

#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)

pthread_setintr(PTHREAD_INTR_ENABLE);

pthread_setintrtype(PTHREAD_INTR_ASYNCHRONOUS);

#else

pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);

pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);

#endif

_cancel_enabled = true;

}

void Thread::detach(void)

{

_is_detached = true;

#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)

pthread_t thread_id=_handle.thid.tt_handle();

pthread_detach(&thread_id);

#else

pthread_detach(_handle.thid.tt_handle());

#endif

}

ThreadStatus Thread::run()

{

StartWrapperArg *arg = new StartWrapperArg;

arg->start = _start;

arg->arg = this;

//thread_data *Thread::put_tsd(Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value) throw(IPCException)

Threads::Type type = _is_detached ? Threads::DETACHED : Threads::JOINABLE;

int rc = Threads::create(_handle.thid, type, _start_wrapper, arg);

// On Linux distributions released prior 2005, the implementation of

// Native POSIX Thread Library returns ENOMEM instead of EAGAIN when

// there

// are no insufficient memory. Hence we are checking for both. See bug

// 386.

#ifndef PEGASUS_THREAD_EXIT_NATIVE

if ((rc == EAGAIN) || (rc == ENOMEM))

void Thread::exit_self(PEGASUS_THREAD_RETURN exit_code)

{

// execute the cleanup stack and then return

while( _cleanup.count() )

{

try

{

cleanup_pop(true);

Threads::clear(_handle.thid);

delete arg;

return PEGASUS_THREAD_INSUFFICIENT_RESOURCES;

}

catch(IPCException& e)

else if (rc != 0)

{

PEGASUS_ASSERT(0);

Threads::clear(_handle.thid);

break;

delete arg;

return PEGASUS_THREAD_SETUP_FAILURE;

}

return PEGASUS_THREAD_OK;

_exit_code = exit_code;

exit_thread(exit_code);

}

static sigset_t *block_signal_mask(sigset_t * sig)

{

sigemptyset(sig);

// should not be used for main()

sigaddset(sig, SIGHUP);

sigaddset(sig, SIGINT);

// maybe useless, since KILL can't be blocked according to POSIX

sigaddset(sig, SIGKILL);

#endif

sigaddset(sig, SIGABRT);

sigaddset(sig, SIGALRM);

sigaddset(sig, SIGPIPE);

ThreadPool::ThreadPool(Sint16 initial_size,

// Note: older versions of the linux pthreads library use SIGUSR1 and SIGUSR2

Sint16 max,

// internally to stop and start threads that are blocking, the newer ones

Sint16 min,

// implement this through the kernel's real time signals

Sint8 *key)

// since SIGSTOP/CONT can handle suspend()/resume() on Linux

: _max_threads(max), _min_threads(min),

// block them

_current_threads(0), _waiters(initial_size),

// #if defined(PEGASUS_PLATFORM_LINUX_IX86_GNU)

_pool_sem(0), _pool(true), _running(true),

// sigaddset(sig, SIGUSR1);

_dying(0)

// sigaddset(sig, SIGUSR2);

{

// #endif

_allocate_wait.tv_sec = 1;

#ifndef PEGASUS_PLATFORM_ZOS_ZSERIES_IBM

_allocate_wait.tv_usec = 0;

pthread_sigmask(SIG_BLOCK, sig, NULL);

_deallocate_wait.tv_sec = 30;

#else

_deallocate_wait.tv_usec = 0;

sigprocmask(SIG_BLOCK, sig, NULL);

_deadlock_detect.tv_sec = 60;

#endif

_deadlock_detect.tv_usec = 0;

return sig;

memset(_key, 0x00, 17);

if(key != 0)

strncpy(_key, key, 16);

if(_max_threads < initial_size)

_max_threads = initial_size;

if(_min_threads > initial_size)

_min_threads = initial_size;

int i;

for(i = 0; i < initial_size; i++)

{

_link_pool(_init_thread());

}

Thread::Thread(ThreadReturnType(PEGASUS_THREAD_CDECL * start) (void *), void *parameter, Boolean detached):_is_detached(detached),

_cancel_enabled(true),

_cancelled(false),

_start(start), _cleanup(), _tsd(), _thread_parm(parameter), _exit_code(0)

{

Threads::clear(_handle.thid);

}

ThreadPool::~ThreadPool(void)

Thread::~Thread()

{

_dying++;

try

Thread *th = _pool.remove_first();

{

while(th != 0)

join();

{

empty_tsd();

// signal the thread's sleep semaphore

}

th->cancel();

catch(...)

th->join();

{

th->empty_tsd();

// Do not allow the destructor to throw an exception

delete th;

th = _pool.remove_first();

}

// make this static to the class

#endif /* PEGASUS_HAVE_PTHREADS */

PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL ThreadPool::_loop(void *parm)

{

Thread *myself = (Thread *)parm;

if(myself == 0)

throw NullPointer();

ThreadPool *pool = (ThreadPool *)myself->get_parm();

if(pool == 0 )

throw NullPointer();

Semaphore *sleep_sem;

struct timeval *deadlock_timer;

try

//==============================================================================

// Windows Threads Implementation:

//==============================================================================

#if defined(PEGASUS_HAVE_WINDOWS_THREADS)

ThreadStatus Thread::run(void)

{

sleep_sem = (Semaphore *)myself->reference_tsd("sleep sem");

// Note: A Win32 thread ID is not the same thing as a pthread ID.

myself->dereference_tsd();

// Win32 threads have both a thread ID and a handle. The handle

deadlock_timer = (struct timeval *)myself->reference_tsd("deadlock timer");

// is used in the wait functions, etc.

myself->dereference_tsd();

// So _handle.thid is actually the thread handle.

unsigned threadid = 0;

ThreadType tt;

tt.handle = (HANDLE) _beginthreadex(NULL, 0, _start, this, 0, &threadid);

_handle.thid = tt;

if (Threads::id(_handle.thid) == 0)

{

if (errno == EAGAIN)

{

return PEGASUS_THREAD_INSUFFICIENT_RESOURCES;

}

catch(IPCException & e)

else

{

myself->exit_self(0);

return PEGASUS_THREAD_SETUP_FAILURE;

}

return PEGASUS_THREAD_OK;

}

if(sleep_sem == 0 || deadlock_timer == 0)

throw NullPointer();

while(pool->_dying < 1)

void Thread::cancel(void)

{

myself->test_cancel();

_cancelled = true;

sleep_sem->wait();

}

// when we awaken we reside on the running queue, not the pool queue

myself->test_cancel();

gettimeofday(deadlock_timer, NULL);

PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *_work)(void *);

void Thread::test_cancel(void)

void *parm;

{

if (_cancel_enabled && _cancelled)

{

exit_self(0);

}

try

Boolean Thread::is_cancelled(void)

{

_work = (PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)) \

return _cancelled;

myself->reference_tsd("work func");

myself->dereference_tsd();

parm = myself->reference_tsd("work parm");

myself->dereference_tsd();

}

catch(IPCException & e)

void Thread::thread_switch(void)

{

myself->exit_self(0);

Sleep(0);

}

if(_work == 0)

void Thread::sleep(Uint32 milliseconds)

throw NullPointer();

{

_work(parm);

Sleep(milliseconds);

}

// put myself back onto the available list

void Thread::join(void)

try

{

if (Threads::id(_handle.thid) != 0)

{

if (!_is_detached)

{

pool->_running.remove((void *)myself);

if (!_cancelled)

pool->_link_pool(myself);

{

// Emulate the unix join api. Caller sleeps until thread is

// done.

WaitForSingleObject(_handle.thid.handle, INFINITE);

}

catch(IPCException & e)

else

{

// Currently this is the only way to ensure this code does

// not

// hang forever.

if (WaitForSingleObject(_handle.thid.handle, 10000) ==

WAIT_TIMEOUT)

{

myself->exit_self(0);

TerminateThread(_handle.thid.handle, 0);

}

myself->exit_self(0);

return((PEGASUS_THREAD_RETURN)0);

DWORD exit_code = 0;

GetExitCodeThread(_handle.thid.handle, &exit_code);

_exit_code = (ThreadReturnType) exit_code;

}

CloseHandle(_handle.thid.handle);

Threads::clear(_handle.thid);

}

void ThreadPool::allocate_and_awaken(void *parm,

void Thread::thread_init(void)

PEGASUS_THREAD_RETURN \

(PEGASUS_THREAD_CDECL *work)(void *))

throw(IPCException)

{

struct timeval start;

_cancel_enabled = true;

gettimeofday(&start, NULL);

}

Thread *th = _pool.remove_first();

void Thread::detach(void)

{

_is_detached = true;

}

while (th == 0 && _dying < 1)

Thread::Thread(ThreadReturnType(PEGASUS_THREAD_CDECL * start) (void *),

void *parameter,

Boolean detached):_is_detached(detached),

_cancel_enabled(true),

_cancelled(false),

_start(start), _cleanup(), _tsd(), _thread_parm(parameter), _exit_code(0)

{

try // we couldn't get a free thread from the pool

Threads::clear(_handle.thid);

}

Thread::~Thread()

{

// wait for the right interval and try again

try

while(th == 0 && _dying < 1)

{

_check_deadlock(&start);

join();

Uint32 interval = _allocate_wait.tv_sec * 1000;

empty_tsd();

if(_allocate_wait.tv_usec > 0)

interval += (_deallocate_wait.tv_usec / 1000);

// will throw a timeout if no thread comes free

_pool_sem.time_wait(interval);

th = _pool.remove_first();

}

catch(...)

catch(TimeOut & to)

{

if(_current_threads < _max_threads)

{

th = _init_thread();

break;

}

// will throw a Deadlock Exception before falling out of the loop

_check_deadlock(&start);

#endif /* PEGASUS_HAVE_WINDOWS_THREADS */

} // while th == null

//==============================================================================

if(_dying < 1)

{

// Common implementation:

// initialize the thread data with the work function and parameters

th->remove_tsd("work func");

//==============================================================================

th->put_tsd("work func", NULL,

sizeof( PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)),

void thread_data::default_delete(void *data)

(void *)work);

{

th->remove_tsd("work parm");

if (data != NULL)

th->put_tsd("work parm", NULL, sizeof(void *), parm);

::operator delete(data);

}

// put the thread on the running list

_running.insert_first(th);

void language_delete(void *data)

{

// signal the thread's sleep semaphore to awaken it

if (data != NULL)

Semaphore *sleep_sem = (Semaphore *)th->reference_tsd("sleep sem");

{

if(sleep_sem == 0)

AutoPtr < AcceptLanguageList > al(static_cast <

throw NullPointer();

AcceptLanguageList * >(data));

sleep_sem->signal();

}

else

_pool.insert_first(th);

}

// caller is responsible for only calling this routine during slack periods

Boolean Thread::_signals_blocked = false;

// but should call it at least once per _deadlock_detect with the running q

#ifndef PEGASUS_OS_ZOS

// and at least once per _deallocate_wait for the pool q

TSDKeyType Thread::_platform_thread_key = TSDKeyType(-1);

#else

TSDKeyType Thread::_platform_thread_key;

#endif

Boolean Thread::_key_initialized = false;

Boolean Thread::_key_error = false;

void ThreadPool::_kill_dead_threads(DQueue<Thread> *q, Boolean (*check)(struct timeval *))

void Thread::cleanup_push(void (*routine) (void *), void *parm)

throw(IPCException)

{

struct timeval now;

AutoPtr < cleanup_handler > cu(new cleanup_handler(routine, parm));

gettimeofday(&now, NULL);

_cleanup.insert_front(cu.get());

cu.release();

DQueue<Thread> dead(true) ;

return;

}

if(q->count() > 0 )

void Thread::cleanup_pop(Boolean execute)

{

AutoPtr < cleanup_handler > cu;

try

{

q->try_lock();

cu.reset(_cleanup.remove_front());

}

catch(AlreadyLocked & a)

catch(IPCException &)

{

return;

PEGASUS_ASSERT(0);

}

if (execute == true)

cu->execute();

}

Thread *context = 0;

struct timeval dt = { 0, 0 };

//thread_data *Thread::put_tsd(const Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value)

struct timeval *dtp;

Thread *th = q->next(context);

while (th != 0 )

void Thread::exit_self(ThreadReturnType exit_code)

{

#if defined(PEGASUS_PLATFORM_HPUX_ACC) || \

defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU)

// NOTE: pthread_exit exhibits unusual behavior on RHEL 3 U2, as

// documented in Bugzilla 3836. Where feasible, it may be advantageous

// to avoid using this function.

pthread_exit(exit_code);

#else

// execute the cleanup stack and then return

while (_cleanup.size())

{

try

{

dtp = (struct timeval *)th->try_reference_tsd("deadlock timer");

cleanup_pop(true);

}

catch(AlreadyLocked & a)

catch(IPCException &)

{

context = th;

PEGASUS_ASSERT(0);

th = q->next(context);

break;

continue;

}

_exit_code = exit_code;

Threads::exit(exit_code);

Threads::clear(_handle.thid);

#endif

}

Sint8 Thread::initializeKey()

{

PEG_METHOD_ENTER(TRC_THREAD, "Thread::initializeKey");

if (!Thread::_key_initialized)

{

if (Thread::_key_error)

{

Tracer::trace(TRC_THREAD, Tracer::LEVEL4,

"Thread: ERROR - thread key error");

return -1;

}

if(dtp != 0)

if (TSDKey::create(&Thread::_platform_thread_key) == 0)

{

memcpy(&dt, dtp, sizeof(struct timeval));

Tracer::trace(TRC_THREAD, Tracer::LEVEL4,

"Thread: able to create a thread key");

Thread::_key_initialized = true;

}

else

{

Tracer::trace(TRC_THREAD, Tracer::LEVEL4,

"Thread: ERROR - unable to create a thread key");

Thread::_key_error = true;

return -1;

}

PEG_METHOD_EXIT();

return 0;

}

th->dereference_tsd();

if( true == check(&dt))

Thread *Thread::getCurrent()

{

PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent");

if (Thread::initializeKey() != 0)

{

th = q->remove_no_lock((void *)th);

return NULL;

}

PEG_METHOD_EXIT();

return (Thread *) TSDKey::get_thread_specific(_platform_thread_key);

}

if(th != 0)

void Thread::setCurrent(Thread * thrd)

{

PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent");

if (Thread::initializeKey() == 0)

{

if (TSDKey::

set_thread_specific(Thread::_platform_thread_key,

(void *) thrd) == 0)

{

dead.insert_first(th);

Tracer::trace(TRC_THREAD, Tracer::LEVEL4,

th = 0;

"Successful set Thread * into thread specific storage");

}

else

{

Tracer::trace(TRC_THREAD, Tracer::LEVEL4,

"ERROR: error setting Thread * into thread specific storage");

}

context = th;

th = q->next(context);

}

q->unlock();

PEG_METHOD_EXIT();

}

if(dead.count())

AcceptLanguageList *Thread::getLanguages()

{

Thread *th = dead.remove_first();

while(th != 0)

{

th->cancel();

PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages");

th->join();

delete th;

Thread *curThrd = Thread::getCurrent();

th = dead.remove_first();

if (curThrd == NULL)

return NULL;

AcceptLanguageList *acceptLangs =

(AcceptLanguageList *) curThrd->reference_tsd("acceptLanguages");

curThrd->dereference_tsd();

PEG_METHOD_EXIT();

return acceptLangs;

}

void Thread::setLanguages(AcceptLanguageList * langs) // l10n

{

PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages");

Thread *currentThrd = Thread::getCurrent();

if (currentThrd != NULL)

{

// deletes the old tsd and creates a new one

currentThrd->put_tsd("acceptLanguages",

language_delete,

sizeof (AcceptLanguageList *), langs);

}

return;

PEG_METHOD_EXIT();

}

Boolean ThreadPool::_check_time(struct timeval *start, struct timeval *interval)

void Thread::clearLanguages() // l10n

{

struct timeval now;

PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages");

gettimeofday(&now, NULL);

if( (now.tv_sec - start->tv_sec) > interval->tv_sec ||

Thread *currentThrd = Thread::getCurrent();

(((now.tv_sec - start->tv_sec) == interval->tv_sec) &&

if (currentThrd != NULL)

((now.tv_usec - start->tv_usec) >= interval->tv_usec ) ) )

{

return true;

// deletes the old tsd

else

currentThrd->delete_tsd("acceptLanguages");

return false;

}

PEG_METHOD_EXIT();

}

PEGASUS_NAMESPACE_END

// ATTN: not sure where to put this!

#ifdef PEGASUS_ZOS_SECURITY

bool isEnhancedSecurity = 99;

#endif

PEGASUS_NAMESPACE_END

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