version 1.90.2.1, 2006/07/27 23:11:52
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version 1.90.2.9, 2006/07/29 15:54:07
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#include <Pegasus/Common/Tracer.h> | #include <Pegasus/Common/Tracer.h> |
#include "Time.h" | #include "Time.h" |
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#if defined(PEGASUS_OS_TYPE_WINDOWS) |
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# include "ThreadWindows.cpp" |
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#elif defined(PEGASUS_OS_TYPE_UNIX) |
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# include "ThreadUnix.cpp" |
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#elif defined(PEGASUS_OS_TYPE_NSK) |
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# include "ThreadNsk.cpp" |
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#elif defined(PEGASUS_OS_VMS) |
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# include "ThreadVms.cpp" |
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#else |
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# error "Unsupported platform" |
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#endif |
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PEGASUS_USING_STD; | PEGASUS_USING_STD; |
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PEGASUS_NAMESPACE_BEGIN | PEGASUS_NAMESPACE_BEGIN |
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//============================================================================== |
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// |
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// POSIX Threads Implementation: |
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// |
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//============================================================================== |
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void thread_data::default_delete(void * data) |
#if defined(PEGASUS_HAVE_PTHREADS) |
{ |
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if( data != NULL) |
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::operator delete(data); |
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} |
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// l10n start |
struct StartWrapperArg |
void language_delete(void * data) |
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{ | { |
if( data != NULL) |
void *(PEGASUS_THREAD_CDECL * start) (void *); |
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void *arg; |
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}; |
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extern "C" void *_start_wrapper(void *arg_) |
{ | { |
AutoPtr<AcceptLanguageList> al(static_cast<AcceptLanguageList *>(data)); |
StartWrapperArg *arg = (StartWrapperArg *) arg_; |
} |
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} |
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// l10n end |
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Boolean Thread::_signals_blocked = false; |
void *return_value = (*arg->start) (arg->arg); |
// l10n |
delete arg; |
#ifndef PEGASUS_OS_ZOS |
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TSDKeyType Thread::_platform_thread_key = TSDKeyType(-1); |
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#else |
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TSDKeyType Thread::_platform_thread_key; |
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#endif |
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Boolean Thread::_key_initialized = false; |
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Boolean Thread::_key_error = false; |
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return return_value; |
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} |
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void Thread::cleanup_push( void (*routine)(void *), void *parm) |
void Thread::cancel() |
{ | { |
AutoPtr<cleanup_handler> cu(new cleanup_handler(routine, parm)); |
_cancelled = true; |
_cleanup.insert_front(cu.get()); |
pthread_cancel(_handle.thid.tt_handle()); |
cu.release(); |
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return; |
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} | } |
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void Thread::cleanup_pop(Boolean execute) |
void Thread::test_cancel() |
{ |
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AutoPtr<cleanup_handler> cu; |
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try |
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{ | { |
cu.reset(_cleanup.remove_front()); |
#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
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pthread_testintr(); |
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#else |
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pthread_testcancel(); |
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#endif |
} | } |
catch(IPCException&) |
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Boolean Thread::is_cancelled(void) |
{ | { |
PEGASUS_ASSERT(0); |
return _cancelled; |
} | } |
if(execute == true) |
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cu->execute(); |
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} |
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//thread_data *Thread::put_tsd(const Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value) |
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#ifndef PEGASUS_THREAD_EXIT_NATIVE |
void Thread::thread_switch() |
void Thread::exit_self(ThreadReturnType exit_code) |
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{ |
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// execute the cleanup stack and then return |
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while( _cleanup.size() ) |
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{ |
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try |
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{ | { |
cleanup_pop(true); |
#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
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pthread_yield(NULL); |
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#else |
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sched_yield(); |
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#endif |
} | } |
catch(IPCException&) |
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/* |
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ATTN: why are these missing on other platforms? |
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*/ |
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#if defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) |
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void Thread::suspend() |
{ | { |
PEGASUS_ASSERT(0); |
pthread_kill(_handle.thid.tt_handle(), SIGSTOP); |
break; |
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} |
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} |
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_exit_code = exit_code; |
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Threads::exit(exit_code); |
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_handle.thid = 0; |
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} | } |
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void Thread::resume() |
#endif |
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// l10n start |
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Sint8 Thread::initializeKey() |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::initializeKey"); |
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if (!Thread::_key_initialized) |
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{ |
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if (Thread::_key_error) |
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{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
pthread_kill(_handle.thid.tt_handle(), SIGCONT); |
"Thread: ERROR - thread key error"); |
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return -1; |
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} | } |
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#endif |
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if (TSDKey::create(&Thread::_platform_thread_key) == 0) |
void Thread::sleep(Uint32 msec) |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
Threads::sleep(msec); |
"Thread: able to create a thread key"); |
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Thread::_key_initialized = true; |
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} | } |
else |
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void Thread::join(void) |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
if (!_is_detached && Threads::id(_handle.thid) != 0) |
"Thread: ERROR - unable to create a thread key"); |
pthread_join(_handle.thid.tt_handle(), &_exit_code); |
Thread::_key_error = true; |
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return -1; |
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} |
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} |
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PEG_METHOD_EXIT(); |
Threads::clear(_handle.thid); |
return 0; |
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} | } |
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Thread * Thread::getCurrent() |
void Thread::thread_init(void) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent"); |
#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
if (Thread::initializeKey() != 0) |
pthread_setintr(PTHREAD_INTR_ENABLE); |
{ |
pthread_setintrtype(PTHREAD_INTR_ASYNCHRONOUS); |
return NULL; |
#else |
} |
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL); |
PEG_METHOD_EXIT(); |
pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL); |
return (Thread *)TSDKey::get_thread_specific(_platform_thread_key); |
#endif |
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_cancel_enabled = true; |
} | } |
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void Thread::setCurrent(Thread * thrd) |
void Thread::detach(void) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent"); |
_is_detached = true; |
if (Thread::initializeKey() == 0) |
pthread_detach(_handle.thid.tt_handle()); |
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} |
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ThreadStatus Thread::run() |
{ | { |
if (TSDKey::set_thread_specific( |
StartWrapperArg *arg = new StartWrapperArg; |
Thread::_platform_thread_key, (void *) thrd) == 0) |
arg->start = _start; |
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arg->arg = this; |
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Threads::Type type = _is_detached ? Threads::DETACHED : Threads::JOINABLE; |
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int rc = Threads::create(_handle.thid, type, _start_wrapper, arg); |
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// On Linux distributions released prior 2005, the implementation of |
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// Native POSIX Thread Library returns ENOMEM instead of EAGAIN when |
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// there |
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// are no insufficient memory. Hence we are checking for both. See bug |
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// 386. |
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if ((rc == EAGAIN) || (rc == ENOMEM)) |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
Threads::clear(_handle.thid); |
"Successful set Thread * into thread specific storage"); |
delete arg; |
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return PEGASUS_THREAD_INSUFFICIENT_RESOURCES; |
} | } |
else |
else if (rc != 0) |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
Threads::clear(_handle.thid); |
"ERROR: error setting Thread * into thread specific storage"); |
delete arg; |
} |
return PEGASUS_THREAD_SETUP_FAILURE; |
} | } |
PEG_METHOD_EXIT(); |
return PEGASUS_THREAD_OK; |
} | } |
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AcceptLanguageList * Thread::getLanguages() |
static sigset_t *block_signal_mask(sigset_t * sig) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages"); |
sigemptyset(sig); |
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// should not be used for main() |
Thread * curThrd = Thread::getCurrent(); |
sigaddset(sig, SIGHUP); |
if (curThrd == NULL) |
sigaddset(sig, SIGINT); |
return NULL; |
// maybe useless, since KILL can't be blocked according to POSIX |
AcceptLanguageList * acceptLangs = |
sigaddset(sig, SIGKILL); |
(AcceptLanguageList *)curThrd->reference_tsd("acceptLanguages"); |
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curThrd->dereference_tsd(); |
sigaddset(sig, SIGABRT); |
PEG_METHOD_EXIT(); |
sigaddset(sig, SIGALRM); |
return acceptLangs; |
sigaddset(sig, SIGPIPE); |
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// Note: older versions of the linux pthreads library use SIGUSR1 and SIGUSR2 |
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// internally to stop and start threads that are blocking, the newer ones |
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// implement this through the kernel's real time signals |
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// since SIGSTOP/CONT can handle suspend()/resume() on Linux |
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// block them |
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// #if defined(PEGASUS_PLATFORM_LINUX_IX86_GNU) |
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// sigaddset(sig, SIGUSR1); |
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// sigaddset(sig, SIGUSR2); |
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// #endif |
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#ifndef PEGASUS_PLATFORM_ZOS_ZSERIES_IBM |
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pthread_sigmask(SIG_BLOCK, sig, NULL); |
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#else |
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sigprocmask(SIG_BLOCK, sig, NULL); |
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#endif |
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return sig; |
} | } |
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void Thread::setLanguages(AcceptLanguageList *langs) //l10n |
Thread::Thread(ThreadReturnType(PEGASUS_THREAD_CDECL * start) (void *), void *parameter, Boolean detached):_is_detached(detached), |
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_cancel_enabled(true), |
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_cancelled(false), |
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_start(start), _cleanup(), _tsd(), _thread_parm(parameter), _exit_code(0) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages"); |
Threads::clear(_handle.thid); |
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Thread* currentThrd = Thread::getCurrent(); |
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if (currentThrd != NULL) |
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{ |
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// deletes the old tsd and creates a new one |
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currentThrd->put_tsd("acceptLanguages", |
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language_delete, |
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sizeof(AcceptLanguageList *), |
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langs); |
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} |
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PEG_METHOD_EXIT(); |
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} | } |
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void Thread::clearLanguages() //l10n |
Thread::~Thread() |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages"); |
try |
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Thread * currentThrd = Thread::getCurrent(); |
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if (currentThrd != NULL) |
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{ | { |
// deletes the old tsd |
join(); |
currentThrd->delete_tsd("acceptLanguages"); |
empty_tsd(); |
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} |
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catch(...) |
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{ |
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// Do not allow the destructor to throw an exception |
} | } |
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PEG_METHOD_EXIT(); |
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} | } |
// l10n end |
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#endif /* PEGASUS_HAVE_PTHREADS */ |
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/////////////////////////////////////////////////////////////////////////////// |
//============================================================================== |
// | // |
// ThreadPool |
// Windows Threads Implementation: |
// | // |
/////////////////////////////////////////////////////////////////////////////// |
//============================================================================== |
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ThreadPool::ThreadPool( |
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Sint16 initialSize, |
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const char* key, |
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Sint16 minThreads, |
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Sint16 maxThreads, |
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struct timeval& deallocateWait) |
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: _maxThreads(maxThreads), |
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_minThreads(minThreads), |
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_currentThreads(0), |
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_idleThreads(), |
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_runningThreads(), |
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_dying(0) |
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{ |
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_deallocateWait.tv_sec = deallocateWait.tv_sec; |
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_deallocateWait.tv_usec = deallocateWait.tv_usec; |
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memset(_key, 0x00, 17); |
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if (key != 0) |
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{ |
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strncpy(_key, key, 16); |
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} |
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if ((_maxThreads > 0) && (_maxThreads < initialSize)) |
#if defined(PEGASUS_HAVE_WINDOWS_THREADS) |
{ |
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_maxThreads = initialSize; |
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} |
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if (_minThreads > initialSize) |
ThreadStatus Thread::run(void) |
{ | { |
_minThreads = initialSize; |
// Note: A Win32 thread ID is not the same thing as a pthread ID. |
} |
// Win32 threads have both a thread ID and a handle. The handle |
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// is used in the wait functions, etc. |
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// So _handle.thid is actually the thread handle. |
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for (int i = 0; i < initialSize; i++) |
unsigned threadid = 0; |
{ |
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_addToIdleThreadsQueue(_initializeThread()); |
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} |
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} |
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ThreadPool::~ThreadPool() |
ThreadType tt; |
{ |
tt.handle = (HANDLE) _beginthreadex(NULL, 0, _start, this, 0, &threadid); |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::~ThreadPool"); |
_handle.thid = tt; |
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try |
if (Threads::id(_handle.thid) == 0) |
{ |
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// Set the dying flag so all thread know the destructor has been entered |
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_dying++; |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
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"Cleaning up %d idle threads. ", _currentThreads.get()); |
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while (_currentThreads.get() > 0) |
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{ | { |
Thread* thread = _idleThreads.remove_front(); |
if (errno == EAGAIN) |
if (thread != 0) |
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{ | { |
_cleanupThread(thread); |
return PEGASUS_THREAD_INSUFFICIENT_RESOURCES; |
_currentThreads--; |
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} | } |
else | else |
{ | { |
Threads::yield(); |
return PEGASUS_THREAD_SETUP_FAILURE; |
} | } |
} | } |
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return PEGASUS_THREAD_OK; |
} | } |
catch (...) |
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void Thread::cancel(void) |
{ | { |
} |
_cancelled = true; |
} | } |
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ThreadReturnType PEGASUS_THREAD_CDECL ThreadPool::_loop(void* parm) |
void Thread::test_cancel(void) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_loop"); |
if (_cancel_enabled && _cancelled) |
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try |
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{ | { |
Thread* myself = (Thread *)parm; |
exit_self(0); |
PEGASUS_ASSERT(myself != 0); |
} |
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} |
// Set myself into thread specific storage |
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// This will allow code to get its own Thread |
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Thread::setCurrent(myself); |
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ThreadPool* pool = (ThreadPool *)myself->get_parm(); |
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PEGASUS_ASSERT(pool != 0); |
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Semaphore* sleep_sem = 0; |
Boolean Thread::is_cancelled(void) |
struct timeval* lastActivityTime = 0; |
{ |
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return _cancelled; |
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} |
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try |
void Thread::thread_switch(void) |
{ | { |
sleep_sem = (Semaphore *)myself->reference_tsd("sleep sem"); |
Sleep(0); |
myself->dereference_tsd(); |
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PEGASUS_ASSERT(sleep_sem != 0); |
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lastActivityTime = |
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(struct timeval *)myself->reference_tsd("last activity time"); |
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myself->dereference_tsd(); |
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PEGASUS_ASSERT(lastActivityTime != 0); |
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} | } |
catch (...) |
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void Thread::sleep(Uint32 milliseconds) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
Sleep(milliseconds); |
"ThreadPool::_loop: Failure getting sleep_sem or " |
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"lastActivityTime."); |
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PEGASUS_ASSERT(false); |
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pool->_idleThreads.remove(myself); |
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pool->_currentThreads--; |
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PEG_METHOD_EXIT(); |
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return((ThreadReturnType)1); |
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} | } |
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while (1) |
void Thread::join(void) |
{ | { |
try |
if (Threads::id(_handle.thid) != 0) |
{ | { |
sleep_sem->wait(); |
if (!_is_detached) |
} |
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catch (...) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
if (!_cancelled) |
"ThreadPool::_loop: failure on sleep_sem->wait()."); |
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PEGASUS_ASSERT(false); |
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pool->_idleThreads.remove(myself); |
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pool->_currentThreads--; |
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PEG_METHOD_EXIT(); |
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return((ThreadReturnType)1); |
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} |
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// When we awaken we reside on the _runningThreads queue, not the |
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// _idleThreads queue. |
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ThreadReturnType (PEGASUS_THREAD_CDECL* work)(void *) = 0; |
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void* parm = 0; |
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Semaphore* blocking_sem = 0; |
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try |
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{ | { |
work = (ThreadReturnType (PEGASUS_THREAD_CDECL *)(void *)) |
// Emulate the unix join api. Caller sleeps until thread is |
myself->reference_tsd("work func"); |
// done. |
myself->dereference_tsd(); |
WaitForSingleObject(_handle.thid.handle, INFINITE); |
parm = myself->reference_tsd("work parm"); |
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myself->dereference_tsd(); |
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blocking_sem = (Semaphore *)myself->reference_tsd("blocking sem"); |
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myself->dereference_tsd(); |
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} | } |
catch (...) |
else |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
// Currently this is the only way to ensure this code does |
"ThreadPool::_loop: Failure accessing work func, work parm, " |
// not |
"or blocking sem."); |
// hang forever. |
PEGASUS_ASSERT(false); |
if (WaitForSingleObject(_handle.thid.handle, 10000) == |
pool->_idleThreads.remove(myself); |
WAIT_TIMEOUT) |
pool->_currentThreads--; |
{ |
PEG_METHOD_EXIT(); |
TerminateThread(_handle.thid.handle, 0); |
return((ThreadReturnType)1); |
} |
} | } |
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if (work == 0) |
DWORD exit_code = 0; |
{ |
GetExitCodeThread(_handle.thid.handle, &exit_code); |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
_exit_code = (ThreadReturnType) exit_code; |
"ThreadPool::_loop: work func is 0, meaning we should exit."); |
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break; |
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} | } |
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Time::gettimeofday(lastActivityTime); |
CloseHandle(_handle.thid.handle); |
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Threads::clear(_handle.thid); |
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} |
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} |
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try |
void Thread::thread_init(void) |
{ | { |
PEG_TRACE_STRING(TRC_THREAD, Tracer::LEVEL4, "Work starting."); |
_cancel_enabled = true; |
work(parm); |
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PEG_TRACE_STRING(TRC_THREAD, Tracer::LEVEL4, "Work finished."); |
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} |
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catch (Exception & e) |
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{ |
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PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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String("Exception from work in ThreadPool::_loop: ") + |
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e.getMessage()); |
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} |
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#if !defined(PEGASUS_OS_LSB) |
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catch (const exception& e) |
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{ |
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PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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String("Exception from work in ThreadPool::_loop: ") + |
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e.what()); |
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} | } |
#endif |
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catch (...) |
void Thread::detach(void) |
{ | { |
PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
_is_detached = true; |
"Unknown exception from work in ThreadPool::_loop."); |
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} | } |
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// put myself back onto the available list |
Thread::Thread(ThreadReturnType(PEGASUS_THREAD_CDECL * start) (void *), |
try |
void *parameter, |
{ |
Boolean detached):_is_detached(detached), |
Time::gettimeofday(lastActivityTime); |
_cancel_enabled(true), |
if (blocking_sem != 0) |
_cancelled(false), |
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_start(start), _cleanup(), _tsd(), _thread_parm(parameter), _exit_code(0) |
{ | { |
blocking_sem->signal(); |
Threads::clear(_handle.thid); |
} | } |
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pool->_runningThreads.remove(myself); |
Thread::~Thread() |
pool->_idleThreads.insert_front(myself); |
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} |
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catch (...) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
try |
"ThreadPool::_loop: Adding thread to idle pool failed."); |
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PEGASUS_ASSERT(false); |
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pool->_currentThreads--; |
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PEG_METHOD_EXIT(); |
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return((ThreadReturnType)1); |
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} |
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} |
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} |
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catch (const Exception& e) |
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{ | { |
PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
join(); |
"Caught exception: \"" + e.getMessage() + "\". Exiting _loop."); |
empty_tsd(); |
} | } |
catch (...) | catch (...) |
{ | { |
PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"Caught unrecognized exception. Exiting _loop."); |
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} | } |
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PEG_METHOD_EXIT(); |
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return((ThreadReturnType)0); |
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} | } |
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ThreadStatus ThreadPool::allocate_and_awaken( |
#endif /* PEGASUS_HAVE_WINDOWS_THREADS */ |
void* parm, |
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ThreadReturnType (PEGASUS_THREAD_CDECL* work)(void *), |
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Semaphore* blocking) |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::allocate_and_awaken"); |
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// Allocate_and_awaken will not run if the _dying flag is set. |
//============================================================================== |
// Once the lock is acquired, ~ThreadPool will not change |
// |
// the value of _dying until the lock is released. |
// Common implementation: |
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// |
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//============================================================================== |
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try |
void thread_data::default_delete(void *data) |
{ |
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if (_dying.get()) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
if (data != NULL) |
"ThreadPool::allocate_and_awaken: ThreadPool is dying(1)."); |
::operator delete(data); |
return PEGASUS_THREAD_UNAVAILABLE; |
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} | } |
struct timeval start; |
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Time::gettimeofday(&start); |
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Thread* th = 0; |
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th = _idleThreads.remove_front(); |
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if (th == 0) |
void language_delete(void *data) |
{ | { |
if ((_maxThreads == 0) || |
if (data != NULL) |
(_currentThreads.get() < Uint32(_maxThreads))) |
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{ | { |
th = _initializeThread(); |
AutoPtr < AcceptLanguageList > al(static_cast < |
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AcceptLanguageList * >(data)); |
} | } |
} | } |
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if (th == 0) |
Boolean Thread::_signals_blocked = false; |
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#ifndef PEGASUS_OS_ZOS |
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TSDKeyType Thread::_platform_thread_key = TSDKeyType(-1); |
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#else |
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TSDKeyType Thread::_platform_thread_key; |
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#endif |
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Boolean Thread::_key_initialized = false; |
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Boolean Thread::_key_error = false; |
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void Thread::cleanup_push(void (*routine) (void *), void *parm) |
{ | { |
// ATTN-DME-P3-20031103: This trace message should not be |
AutoPtr < cleanup_handler > cu(new cleanup_handler(routine, parm)); |
// be labeled TRC_DISCARDED_DATA, because it does not |
_cleanup.insert_front(cu.get()); |
// necessarily imply that a failure has occurred. However, |
cu.release(); |
// this label is being used temporarily to help isolate |
return; |
// the cause of client timeout problems. |
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Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"ThreadPool::allocate_and_awaken: Insufficient resources: " |
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" pool = %s, running threads = %d, idle threads = %d", |
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_key, _runningThreads.size(), _idleThreads.size()); |
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return PEGASUS_THREAD_INSUFFICIENT_RESOURCES; |
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} | } |
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// initialize the thread data with the work function and parameters |
void Thread::cleanup_pop(Boolean execute) |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
{ |
"Initializing thread with work function and parameters: parm = %p", |
AutoPtr < cleanup_handler > cu; |
parm); |
try |
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{ |
th->delete_tsd("work func"); |
cu.reset(_cleanup.remove_front()); |
th->put_tsd("work func", NULL, |
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sizeof( ThreadReturnType (PEGASUS_THREAD_CDECL *)(void *)), |
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(void *)work); |
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th->delete_tsd("work parm"); |
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th->put_tsd("work parm", NULL, sizeof(void *), parm); |
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th->delete_tsd("blocking sem"); |
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if (blocking != 0) |
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th->put_tsd("blocking sem", NULL, sizeof(Semaphore *), blocking); |
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// put the thread on the running list |
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_runningThreads.insert_front(th); |
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// signal the thread's sleep semaphore to awaken it |
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Semaphore* sleep_sem = (Semaphore *)th->reference_tsd("sleep sem"); |
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PEGASUS_ASSERT(sleep_sem != 0); |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, "Signal thread to awaken"); |
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sleep_sem->signal(); |
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th->dereference_tsd(); |
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} | } |
catch (...) |
catch(IPCException &) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
PEGASUS_ASSERT(0); |
"ThreadPool::allocate_and_awaken: Operation Failed."); |
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PEG_METHOD_EXIT(); |
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// ATTN: Error result has not yet been defined |
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return PEGASUS_THREAD_SETUP_FAILURE; |
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} | } |
PEG_METHOD_EXIT(); |
if (execute == true) |
return PEGASUS_THREAD_OK; |
cu->execute(); |
} | } |
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// caller is responsible for only calling this routine during slack periods |
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// but should call it at least once per _deallocateWait interval. |
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Uint32 ThreadPool::cleanupIdleThreads() |
//thread_data *Thread::put_tsd(const Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value) |
{ |
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PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::cleanupIdleThreads"); |
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Uint32 numThreadsCleanedUp = 0; |
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Uint32 numIdleThreads = _idleThreads.size(); |
void Thread::exit_self(ThreadReturnType exit_code) |
for (Uint32 i = 0; i < numIdleThreads; i++) |
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{ | { |
// Do not dip below the minimum thread count |
#if defined(PEGASUS_PLATFORM_HPUX_ACC) || \ |
if (_currentThreads.get() <= (Uint32)_minThreads) |
defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) |
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// NOTE: pthread_exit exhibits unusual behavior on RHEL 3 U2, as |
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// documented in Bugzilla 3836. Where feasible, it may be advantageous |
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// to avoid using this function. |
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pthread_exit(exit_code); |
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#else |
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// execute the cleanup stack and then return |
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while (_cleanup.size()) |
{ | { |
break; |
try |
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{ |
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cleanup_pop(true); |
} | } |
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catch(IPCException &) |
Thread* thread = _idleThreads.remove_back(); |
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// If there are no more threads in the _idleThreads queue, we're done. |
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if (thread == 0) |
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{ | { |
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PEGASUS_ASSERT(0); |
break; | break; |
} | } |
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} |
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_exit_code = exit_code; |
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Threads::exit(exit_code); |
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Threads::clear(_handle.thid); |
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#endif |
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} |
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struct timeval* lastActivityTime; |
Sint8 Thread::initializeKey() |
try |
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{ | { |
lastActivityTime = (struct timeval *)thread->try_reference_tsd( |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::initializeKey"); |
"last activity time"); |
if (!Thread::_key_initialized) |
PEGASUS_ASSERT(lastActivityTime != 0); |
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} |
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catch (...) |
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{ | { |
PEGASUS_ASSERT(false); |
if (Thread::_key_error) |
_idleThreads.insert_back(thread); |
{ |
break; |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Thread: ERROR - thread key error"); |
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return -1; |
} | } |
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Boolean cleanupThisThread = |
if (TSDKey::create(&Thread::_platform_thread_key) == 0) |
_timeIntervalExpired(lastActivityTime, &_deallocateWait); |
{ |
thread->dereference_tsd(); |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Thread: able to create a thread key"); |
if (cleanupThisThread) |
Thread::_key_initialized = true; |
{ |
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_cleanupThread(thread); |
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_currentThreads--; |
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numThreadsCleanedUp++; |
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} | } |
else | else |
{ | { |
_idleThreads.insert_front(thread); |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Thread: ERROR - unable to create a thread key"); |
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Thread::_key_error = true; |
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return -1; |
} | } |
} | } |
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PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return numThreadsCleanedUp; |
return 0; |
} | } |
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void ThreadPool::_cleanupThread(Thread* thread) |
Thread *Thread::getCurrent() |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::cleanupThread"); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent"); |
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if (Thread::initializeKey() != 0) |
// Set the "work func" and "work parm" to 0 so _loop() knows to exit. |
{ |
thread->delete_tsd("work func"); |
return NULL; |
thread->put_tsd( |
} |
"work func", 0, |
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sizeof(ThreadReturnType (PEGASUS_THREAD_CDECL *)(void *)), |
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(void *) 0); |
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thread->delete_tsd("work parm"); |
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thread->put_tsd("work parm", 0, sizeof(void *), 0); |
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// signal the thread's sleep semaphore to awaken it |
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Semaphore* sleep_sem = (Semaphore *)thread->reference_tsd("sleep sem"); |
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PEGASUS_ASSERT(sleep_sem != 0); |
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sleep_sem->signal(); |
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thread->dereference_tsd(); |
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thread->join(); |
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delete thread; |
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PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
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return (Thread *) TSDKey::get_thread_specific(_platform_thread_key); |
} | } |
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Boolean ThreadPool::_timeIntervalExpired( |
void Thread::setCurrent(Thread * thrd) |
struct timeval* start, |
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struct timeval* interval) |
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{ | { |
// never time out if the interval is zero |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent"); |
if (interval && (interval->tv_sec == 0) && (interval->tv_usec == 0)) |
if (Thread::initializeKey() == 0) |
{ | { |
return false; |
if (TSDKey:: |
} |
set_thread_specific(Thread::_platform_thread_key, |
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(void *) thrd) == 0) |
struct timeval now, finish, remaining; |
{ |
Uint32 usec; |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
Time::gettimeofday(&now); |
"Successful set Thread * into thread specific storage"); |
Time::gettimeofday(&remaining); // Avoid valgrind error |
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finish.tv_sec = start->tv_sec + interval->tv_sec; |
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usec = start->tv_usec + interval->tv_usec; |
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finish.tv_sec += (usec / 1000000); |
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usec %= 1000000; |
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finish.tv_usec = usec; |
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return (Time::subtract(&remaining, &finish, &now) != 0); |
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} | } |
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else |
void ThreadPool::_deleteSemaphore(void *p) |
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{ | { |
delete (Semaphore *)p; |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"ERROR: error setting Thread * into thread specific storage"); |
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} |
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} |
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PEG_METHOD_EXIT(); |
} | } |
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Thread* ThreadPool::_initializeThread() |
AcceptLanguageList *Thread::getLanguages() |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_initializeThread"); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages"); |
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Thread* th = (Thread *) new Thread(_loop, this, false); |
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// allocate a sleep semaphore and pass it in the thread context |
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// initial count is zero, loop function will sleep until |
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// we signal the semaphore |
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Semaphore* sleep_sem = (Semaphore *) new Semaphore(0); |
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th->put_tsd( |
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"sleep sem", &_deleteSemaphore, sizeof(Semaphore), (void *)sleep_sem); |
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struct timeval* lastActivityTime = |
Thread *curThrd = Thread::getCurrent(); |
(struct timeval *) ::operator new(sizeof(struct timeval)); |
if (curThrd == NULL) |
Time::gettimeofday(lastActivityTime); |
return NULL; |
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AcceptLanguageList *acceptLangs = |
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(AcceptLanguageList *) curThrd->reference_tsd("acceptLanguages"); |
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curThrd->dereference_tsd(); |
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PEG_METHOD_EXIT(); |
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return acceptLangs; |
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} |
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th->put_tsd("last activity time", thread_data::default_delete, |
void Thread::setLanguages(AcceptLanguageList * langs) // l10n |
sizeof(struct timeval), (void *)lastActivityTime); |
{ |
// thread will enter _loop() and sleep on sleep_sem until we signal it |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages"); |
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if (th->run() != PEGASUS_THREAD_OK) |
Thread *currentThrd = Thread::getCurrent(); |
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if (currentThrd != NULL) |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
// deletes the old tsd and creates a new one |
"Could not create thread. Error code is %d.", errno); |
currentThrd->put_tsd("acceptLanguages", |
delete th; |
language_delete, |
return 0; |
sizeof (AcceptLanguageList *), langs); |
} | } |
_currentThreads++; |
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Threads::yield(); |
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PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return th; |
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} | } |
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void ThreadPool::_addToIdleThreadsQueue(Thread* th) |
void Thread::clearLanguages() // l10n |
{ |
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if (th == 0) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages"); |
"ThreadPool::_addToIdleThreadsQueue: Thread pointer is null."); |
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throw NullPointer(); |
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} |
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try |
Thread *currentThrd = Thread::getCurrent(); |
{ |
if (currentThrd != NULL) |
_idleThreads.insert_front(th); |
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} |
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catch (...) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
// deletes the old tsd |
"ThreadPool::_addToIdleThreadsQueue: _idleThreads.insert_front " |
currentThrd->delete_tsd("acceptLanguages"); |
"failed."); |
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} | } |
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PEG_METHOD_EXIT(); |
} | } |
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// ATTN: not sure where to put this! | // ATTN: not sure where to put this! |