version 1.71.2.6, 2005/08/16 17:30:51
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version 1.107, 2008/09/16 18:37:03
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//%2004//////////////////////////////////////////////////////////////////////// |
//%2006//////////////////////////////////////////////////////////////////////// |
// | // |
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development | // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development |
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. | // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. |
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// IBM Corp.; EMC Corporation, The Open Group. | // IBM Corp.; EMC Corporation, The Open Group. |
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; | // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; |
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group. | // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group. |
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// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.; |
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// EMC Corporation; VERITAS Software Corporation; The Open Group. |
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// Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.; |
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// EMC Corporation; Symantec Corporation; The Open Group. |
// | // |
// Permission is hereby granted, free of charge, to any person obtaining a copy | // Permission is hereby granted, free of charge, to any person obtaining a copy |
// of this software and associated documentation files (the "Software"), to | // of this software and associated documentation files (the "Software"), to |
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// | // |
//============================================================================== | //============================================================================== |
// | // |
// Author: Mike Day (mdday@us.ibm.com) |
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// |
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// Modified By: Rudy Schuet (rudy.schuet@compaq.com) 11/12/01 |
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// added nsk platform support |
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// Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com) |
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// Amit K Arora, IBM (amita@in.ibm.com) for PEP#101 |
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// |
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//%///////////////////////////////////////////////////////////////////////////// | //%///////////////////////////////////////////////////////////////////////////// |
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#include "Thread.h" | #include "Thread.h" |
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#include <errno.h> |
#include <exception> | #include <exception> |
#include <Pegasus/Common/IPC.h> |
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#include <Pegasus/Common/Tracer.h> | #include <Pegasus/Common/Tracer.h> |
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#include <Pegasus/Common/AutoPtr.h> |
#if defined(PEGASUS_OS_TYPE_WINDOWS) |
#include "Time.h" |
# 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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#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<AcceptLanguages> al(static_cast<AcceptLanguages *>(data)); |
// Clean up dynamic memory now to prevent a leak if the thread is canceled. |
} |
StartWrapperArg arg; |
} |
arg.start = ((StartWrapperArg *) arg_)->start; |
// l10n end |
arg.arg = ((StartWrapperArg *) arg_)->arg; |
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delete (StartWrapperArg *) arg_; |
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Boolean Thread::_signals_blocked = false; |
// establish cancelability of the thread |
// l10n |
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL); |
#ifndef PEGASUS_OS_ZOS |
pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL); |
PEGASUS_THREAD_KEY_TYPE Thread::_platform_thread_key = |
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PEGASUS_THREAD_KEY_TYPE(-1); |
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#else |
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PEGASUS_THREAD_KEY_TYPE 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 *return_value = (*arg.start) (arg.arg); |
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void Thread::cleanup_push( void (*routine)(void *), void *parm) throw(IPCException) |
return return_value; |
{ |
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AutoPtr<cleanup_handler> cu(new cleanup_handler(routine, parm)); |
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_cleanup.insert_first(cu.get()); |
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cu.release(); |
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return; |
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} | } |
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void Thread::cleanup_pop(Boolean execute) throw(IPCException) |
void Thread::cancel() |
{ |
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AutoPtr<cleanup_handler> cu ; |
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try |
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{ | { |
cu.reset(_cleanup.remove_first()); |
pthread_cancel(_handle.thid.thread); |
} | } |
catch(IPCException&) |
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{ |
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PEGASUS_ASSERT(0); |
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} |
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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) throw(IPCException) |
void Thread::thread_switch() |
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#ifndef PEGASUS_THREAD_EXIT_NATIVE |
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void Thread::exit_self(PEGASUS_THREAD_RETURN exit_code) |
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{ | { |
// execute the cleanup stack and then return |
#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
while( _cleanup.count() ) |
pthread_yield(NULL); |
{ |
#else |
try |
sched_yield(); |
{ |
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cleanup_pop(true); |
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} |
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catch(IPCException&) |
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{ |
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PEGASUS_ASSERT(0); |
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break; |
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} |
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} |
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_exit_code = exit_code; |
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exit_thread(exit_code); |
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_handle.thid = 0; |
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} |
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#endif | #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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{ |
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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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} | } |
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if (pegasus_key_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() |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
if (!_is_detached && !Threads::null(_handle.thid)) |
"Thread: ERROR - unable to create a thread key"); |
pthread_join(_handle.thid.thread, &_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::detach() |
{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent"); |
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if (Thread::initializeKey() != 0) |
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{ | { |
return NULL; |
_is_detached = true; |
} |
#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
PEG_METHOD_EXIT(); |
pthread_t thread_id=_handle.thid.thread; |
return (Thread *)pegasus_get_thread_specific(_platform_thread_key); |
pthread_detach(&thread_id); |
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#else |
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pthread_detach(_handle.thid.thread); |
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#endif |
} | } |
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void Thread::setCurrent(Thread * thrd) |
ThreadStatus Thread::run() |
{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent"); |
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if (Thread::initializeKey() == 0) |
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{ | { |
if (pegasus_set_thread_specific(Thread::_platform_thread_key, |
StartWrapperArg *arg = new StartWrapperArg; |
(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 == -1) |
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rc = errno; |
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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: got 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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AcceptLanguages * Thread::getLanguages() |
Thread::Thread( |
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ThreadReturnType(PEGASUS_THREAD_CDECL* start) (void*), |
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void* parameter, |
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Boolean detached) |
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: _is_detached(detached), |
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_start(start), |
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_cleanup(), |
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_tsd(), |
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_thread_parm(parameter), |
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_exit_code(0) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages"); |
Threads::clear(_handle.thid); |
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Thread * curThrd = Thread::getCurrent(); |
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if (curThrd == NULL) |
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return NULL; |
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AcceptLanguages * acceptLangs = |
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(AcceptLanguages *)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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void Thread::setLanguages(AcceptLanguages *langs) //l10n |
Thread::~Thread() |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages"); |
try |
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Thread * currentThrd = Thread::getCurrent(); |
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if (currentThrd != NULL) |
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{ | { |
// deletes the old tsd and creates a new one |
join(); |
currentThrd->put_tsd("acceptLanguages", |
empty_tsd(); |
language_delete, |
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sizeof(AcceptLanguages *), |
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langs); |
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} |
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PEG_METHOD_EXIT(); |
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} | } |
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catch (...) |
void Thread::clearLanguages() //l10n |
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{ |
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PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages"); |
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Thread * currentThrd = Thread::getCurrent(); |
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if (currentThrd != NULL) |
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{ | { |
// deletes the old tsd |
// Do not allow the destructor to throw an exception |
currentThrd->delete_tsd("acceptLanguages"); |
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} | } |
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PEG_METHOD_EXIT(); |
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} | } |
// l10n end |
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#if 0 |
#endif /* PEGASUS_HAVE_PTHREADS */ |
// two special synchronization classes for ThreadPool |
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// |
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class timed_mutex |
//============================================================================== |
{ |
// |
public: |
// Windows Threads Implementation: |
timed_mutex(Mutex* mut, int msec) |
// |
:_mut(mut) |
//============================================================================== |
{ |
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_mut->timed_lock(msec, pegasus_thread_self()); |
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} |
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~timed_mutex(void) |
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{ |
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_mut->unlock(); |
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} |
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Mutex* _mut; |
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}; |
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#endif |
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class try_mutex |
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{ |
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public: |
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try_mutex(Mutex* mut) |
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:_mut(mut) |
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{ |
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_mut->try_lock(pegasus_thread_self()); |
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} |
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~try_mutex(void) |
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{ |
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_mut->unlock(); |
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} |
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Mutex* _mut; |
#if defined(PEGASUS_HAVE_WINDOWS_THREADS) |
}; |
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class auto_int |
ThreadStatus Thread::run() |
{ | { |
public: |
// Note: A Win32 thread ID is not the same thing as a pthread ID. |
auto_int(AtomicInt* num) |
// Win32 threads have both a thread ID and a handle. The handle |
: _int(num) |
// is used in the wait functions, etc. |
{ |
// So _handle.thid is actually the thread handle. |
_int->operator++(); |
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} |
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~auto_int(void) |
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{ |
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_int->operator--(); |
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} |
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AtomicInt *_int; |
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}; |
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AtomicInt _idle_control; |
unsigned threadid = 0; |
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DQueue<ThreadPool> ThreadPool::_pools(true); |
ThreadType tt; |
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tt.handle = (HANDLE) _beginthreadex(NULL, 0, _start, this, 0, &threadid); |
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_handle.thid = tt; |
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void ThreadPool::kill_idle_threads(void) |
if (Threads::null(_handle.thid)) |
{ | { |
static struct timeval now, last = {0, 0}; |
if (errno == EAGAIN) |
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pegasus_gettimeofday(&now); |
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if(now.tv_sec - last.tv_sec > 5) |
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{ |
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_pools.lock(); |
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ThreadPool *p = _pools.next(0); |
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while(p != 0) |
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{ | { |
try |
return PEGASUS_THREAD_INSUFFICIENT_RESOURCES; |
{ |
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p->kill_dead_threads(); |
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} | } |
catch(...) |
else |
{ | { |
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return PEGASUS_THREAD_SETUP_FAILURE; |
} | } |
p = _pools.next(p); |
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} |
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_pools.unlock(); |
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pegasus_gettimeofday(&last); |
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} | } |
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return PEGASUS_THREAD_OK; |
} | } |
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void Thread::cancel() |
ThreadPool::ThreadPool(Sint16 initial_size, |
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const Sint8 *key, |
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Sint16 min, |
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Sint16 max, |
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struct timeval & alloc_wait, |
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struct timeval & dealloc_wait, |
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struct timeval & deadlock_detect) |
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: _max_threads(max), _min_threads(min), |
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_current_threads(0), |
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_pool(true), _running(true), |
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_dead(true), _dying(0) |
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{ | { |
_allocate_wait.tv_sec = alloc_wait.tv_sec; |
_cancelled = true; |
_allocate_wait.tv_usec = alloc_wait.tv_usec; |
} |
_deallocate_wait.tv_sec = dealloc_wait.tv_sec; |
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_deallocate_wait.tv_usec = dealloc_wait.tv_usec; |
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_deadlock_detect.tv_sec = deadlock_detect.tv_sec; |
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_deadlock_detect.tv_usec = deadlock_detect.tv_usec; |
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memset(_key, 0x00, 17); |
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if(key != 0) |
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strncpy(_key, key, 16); |
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if(_max_threads > 0 && _max_threads < initial_size) |
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_max_threads = initial_size; |
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if(_min_threads > initial_size) |
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_min_threads = initial_size; |
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int i; |
void Thread::thread_switch() |
for(i = 0; i < initial_size; i++) |
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{ | { |
_link_pool(_init_thread()); |
Sleep(0); |
} | } |
_pools.insert_last(this); |
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void Thread::sleep(Uint32 milliseconds) |
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{ |
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Sleep(milliseconds); |
} | } |
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ThreadPool::~ThreadPool(void) |
void Thread::join() |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::~ThreadPool"); |
if (!Threads::null(_handle.thid)) |
try |
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{ | { |
// Set the dying flag so all thread know the destructor has been entered |
if (!_is_detached) |
_dying++; |
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// remove from the global pools list |
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_pools.remove(this); |
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while(_current_threads.value() > 0) |
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{ | { |
Thread* thread = _pool.remove_first(); |
if (!_cancelled) |
if (thread != 0) |
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{ | { |
_cleanupThread(thread); |
// Emulate the unix join api. Caller sleeps until thread is |
_current_threads--; |
// done. |
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WaitForSingleObject(_handle.thid.handle, INFINITE); |
} | } |
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else | else |
{ | { |
pegasus_yield(); |
// Currently this is the only way to ensure this code does |
} |
// not |
} |
// hang forever. |
} |
if (WaitForSingleObject(_handle.thid.handle, 10000) == |
catch(...) |
WAIT_TIMEOUT) |
{ | { |
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TerminateThread(_handle.thid.handle, 0); |
} | } |
} | } |
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// make this static to the class |
DWORD exit_code = 0; |
PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL ThreadPool::_loop(void *parm) |
GetExitCodeThread(_handle.thid.handle, &exit_code); |
{ |
_exit_code = (ThreadReturnType) exit_code; |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_loop"); |
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Thread *myself = (Thread *)parm; |
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if(myself == 0) |
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{ |
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Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"ThreadPool::_loop: Thread pointer is null"); |
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PEG_METHOD_EXIT(); |
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throw NullPointer(); |
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} | } |
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// l10n |
CloseHandle(_handle.thid.handle); |
// Set myself into thread specific storage |
Threads::clear(_handle.thid); |
// This will allow code to get its own Thread |
} |
Thread::setCurrent(myself); |
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ThreadPool *pool = (ThreadPool *)myself->get_parm(); |
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if(pool == 0 ) |
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{ |
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Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"ThreadPool::_loop: ThreadPool pointer is null"); |
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PEG_METHOD_EXIT(); |
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throw NullPointer(); |
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} | } |
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Semaphore *sleep_sem = 0; |
void Thread::detach() |
Semaphore *blocking_sem = 0; |
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struct timeval *deadlock_timer = 0; |
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try |
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{ | { |
sleep_sem = (Semaphore *)myself->reference_tsd("sleep sem"); |
_is_detached = true; |
myself->dereference_tsd(); |
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PEGASUS_ASSERT(sleep_sem != 0); |
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deadlock_timer = (struct timeval *)myself->reference_tsd("deadlock timer"); |
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myself->dereference_tsd(); |
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PEGASUS_ASSERT(deadlock_timer != 0); |
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} | } |
catch(...) |
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Thread::Thread(ThreadReturnType(PEGASUS_THREAD_CDECL * start) (void *), |
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void *parameter, |
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Boolean detached):_is_detached(detached), |
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_cancelled(false), |
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_start(start), _cleanup(), _tsd(), _thread_parm(parameter), _exit_code(0) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
Threads::clear(_handle.thid); |
"ThreadPool::_loop: Failure getting sleep_sem or deadlock_timer."); |
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PEGASUS_ASSERT(false); |
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pool->_pool.remove(myself); |
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pool->_current_threads--; |
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PEG_METHOD_EXIT(); |
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return((PEGASUS_THREAD_RETURN)1); |
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} | } |
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while(1) |
Thread::~Thread() |
{ | { |
try | try |
{ | { |
sleep_sem->wait(); |
join(); |
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empty_tsd(); |
} | } |
catch(...) | catch(...) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"ThreadPool::_loop: failure on sleep_sem->wait()."); |
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PEGASUS_ASSERT(false); |
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pool->_pool.remove(myself); |
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pool->_current_threads--; |
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PEG_METHOD_EXIT(); |
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return((PEGASUS_THREAD_RETURN)1); |
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} | } |
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// when we awaken we reside on the running queue, not the pool queue |
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/* Hence no need to move the thread to the _dead queue, as the _running |
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* queue is only dused by kill_dead_threads which makes sure that the |
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* the threads are cleaned up (unlocking any locked lists in the TSD, etc) |
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* before killing it. |
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*/ |
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PEGASUS_THREAD_RETURN (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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{ |
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_work = (PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)) \ |
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myself->reference_tsd("work func"); |
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myself->dereference_tsd(); |
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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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} |
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catch(...) |
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{ |
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Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"ThreadPool::_loop: Failure accessing work func, work parm, or blocking sem."); |
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PEGASUS_ASSERT(false); |
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pool->_pool.remove(myself); |
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pool->_current_threads--; |
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PEG_METHOD_EXIT(); |
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return((PEGASUS_THREAD_RETURN)1); |
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} | } |
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if(_work == 0) |
#endif /* PEGASUS_HAVE_WINDOWS_THREADS */ |
{ |
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Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"ThreadPool::_loop: work func is 0, meaning we should exit."); |
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break; |
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} |
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gettimeofday(deadlock_timer, NULL); |
//============================================================================== |
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// |
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// 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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PEG_TRACE_STRING(TRC_THREAD, Tracer::LEVEL4, |
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"Worker started"); |
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_work(parm); |
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PEG_TRACE_STRING(TRC_THREAD, Tracer::LEVEL4, |
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"Worker 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 (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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} |
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#endif |
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catch(...) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
if (data != NULL) |
"ThreadPool::_loop: execution of _work failed."); |
::operator delete(data); |
} | } |
| |
// put myself back onto the available list |
void language_delete(void *data) |
try |
|
{ | { |
gettimeofday(deadlock_timer, NULL); |
if (data != NULL) |
if( blocking_sem != 0 ) |
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blocking_sem->signal(); |
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|
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Boolean removed = pool->_running.remove((void *)myself); |
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PEGASUS_ASSERT(removed); |
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|
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pool->_pool.insert_first(myself); |
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} |
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catch(...) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
AutoPtr < AcceptLanguageList > al(static_cast < |
"ThreadPool::_loop: Adding thread to idle pool failed."); |
AcceptLanguageList * >(data)); |
PEGASUS_ASSERT(false); |
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pool->_current_threads--; |
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PEG_METHOD_EXIT(); |
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return((PEGASUS_THREAD_RETURN)1); |
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} |
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|
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} | } |
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PEG_METHOD_EXIT(); |
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return((PEGASUS_THREAD_RETURN)0); |
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} | } |
| |
ThreadStatus ThreadPool::allocate_and_awaken(void *parm, |
Boolean Thread::_signals_blocked = false; |
PEGASUS_THREAD_RETURN \ |
#ifndef PEGASUS_OS_ZOS |
(PEGASUS_THREAD_CDECL *work)(void *), |
TSDKeyType Thread::_platform_thread_key = TSDKeyType(-1); |
Semaphore *blocking) |
#else |
|
TSDKeyType Thread::_platform_thread_key; |
{ |
#endif |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::allocate_and_awaken"); |
Boolean Thread::_key_initialized = false; |
|
Boolean Thread::_key_error = false; |
// Allocate_and_awaken will not run if the _dying flag is set. |
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// Once the lock is acquired, ~ThreadPool will not change |
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// the value of _dying until the lock is released. |
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| |
try |
void Thread::cleanup_push(void (*routine) (void *), void *parm) |
{ |
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if (_dying.value()) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
AutoPtr < cleanup_handler > cu(new cleanup_handler(routine, parm)); |
"ThreadPool::allocate_and_awaken: ThreadPool is dying(1)."); |
_cleanup.insert_front(cu.get()); |
return PEGASUS_THREAD_UNAVAILABLE; |
cu.release(); |
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return; |
} | } |
struct timeval start; |
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gettimeofday(&start, NULL); |
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Thread *th = 0; |
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|
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th = _pool.remove_first(); |
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| |
if (th == 0) |
void Thread::cleanup_pop(Boolean execute) |
{ | { |
// will throw an IPCException& |
AutoPtr < cleanup_handler > cu; |
_check_deadlock(&start) ; |
try |
|
|
if(_max_threads == 0 || _current_threads < _max_threads) |
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{ | { |
th = _init_thread(); |
cu.reset(_cleanup.remove_front()); |
} |
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} |
|
|
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if (th == 0) |
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{ |
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// ATTN-DME-P3-20031103: This trace message should not be |
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// be labeled TRC_DISCARDED_DATA, because it does not |
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// necessarily imply that a failure has occurred. However, |
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// this label is being used temporarily to help isolate |
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// the cause of client timeout problems. |
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|
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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, dead threads = %d ", |
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_key, _running.count(), _pool.count(), _dead.count()); |
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return PEGASUS_THREAD_INSUFFICIENT_RESOURCES; |
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} |
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|
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// initialize the thread data with the work function and parameters |
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Initializing thread with work function and parameters: parm = %p", |
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parm); |
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|
|
th->delete_tsd("work func"); |
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th->put_tsd("work func", NULL, |
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sizeof( PEGASUS_THREAD_RETURN (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); |
|
th->delete_tsd("blocking sem"); |
|
if(blocking != 0 ) |
|
th->put_tsd("blocking sem", NULL, sizeof(Semaphore *), blocking); |
|
|
|
// put the thread on the running list |
|
_running.insert_first(th); |
|
|
|
// signal the thread's sleep semaphore to awaken it |
|
Semaphore *sleep_sem = (Semaphore *)th->reference_tsd("sleep sem"); |
|
PEGASUS_ASSERT(sleep_sem != 0); |
|
|
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, "Signal thread to awaken"); |
|
sleep_sem->signal(); |
|
th->dereference_tsd(); |
|
} | } |
catch (...) | catch (...) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
PEGASUS_ASSERT(0); |
"ThreadPool::allocate_and_awaken: Operation Failed."); |
|
PEG_METHOD_EXIT(); |
|
// ATTN: Error result has not yet been defined |
|
return PEGASUS_THREAD_SETUP_FAILURE; |
|
} | } |
PEG_METHOD_EXIT(); |
if (execute == true) |
return PEGASUS_THREAD_OK; |
cu->execute(); |
} | } |
| |
// caller is responsible for only calling this routine during slack periods |
|
// but should call it at least once per _deadlock_detect with the running q |
|
// and at least once per _deallocate_wait for the pool q |
|
| |
Uint32 ThreadPool::kill_dead_threads(void) |
void Thread::exit_self(ThreadReturnType exit_code) |
throw(IPCException) |
|
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::kill_dead_threads"); |
#if !defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) \ |
|
&& !defined(PEGASUS_PLATFORM_PASE_ISERIES_IBMCXX) |
Uint32 numThreadsCleanedUp = 0; |
Threads::exit(exit_code); |
|
#else |
Uint32 numIdleThreads = _pool.count(); |
// execute the cleanup stack and then return |
for (Uint32 i = 0; i < numIdleThreads; i++) |
while (_cleanup.size()) |
{ | { |
// Do not dip below the minimum thread count |
try |
if (_current_threads.value() <= (Uint32)_min_threads) |
|
{ | { |
break; |
cleanup_pop(true); |
} | } |
|
catch (...) |
Thread* thread = _pool.remove_last(); |
|
|
|
// If there are no more threads in the _pool queue, we're done. |
|
if (thread == 0) |
|
{ | { |
|
PEGASUS_ASSERT(0); |
break; | break; |
} | } |
|
} |
|
_exit_code = exit_code; |
|
Threads::exit(exit_code); |
|
Threads::clear(_handle.thid); |
|
#endif |
|
} |
| |
struct timeval* lastActivityTime; |
Sint8 Thread::initializeKey() |
try |
|
{ | { |
lastActivityTime = (struct timeval *)thread->try_reference_tsd( |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::initializeKey"); |
"deadlock timer"); |
if (!Thread::_key_initialized) |
PEGASUS_ASSERT(lastActivityTime != 0); |
|
} |
|
catch (...) |
|
{ | { |
PEGASUS_ASSERT(false); |
if (Thread::_key_error) |
_pool.insert_last(thread); |
{ |
break; |
PEG_TRACE_CSTRING(TRC_THREAD, Tracer::LEVEL1, |
|
"Thread: ERROR - thread key error"); |
|
return -1; |
} | } |
| |
Boolean cleanupThisThread = |
if (TSDKey::create(&Thread::_platform_thread_key) == 0) |
check_time(lastActivityTime, &_deallocate_wait); |
{ |
thread->dereference_tsd(); |
PEG_TRACE_CSTRING(TRC_THREAD, Tracer::LEVEL4, |
|
"Thread: able to create a thread key"); |
if (cleanupThisThread) |
Thread::_key_initialized = true; |
{ |
|
_cleanupThread(thread); |
|
_current_threads--; |
|
numThreadsCleanedUp++; |
|
} | } |
else | else |
{ | { |
_pool.insert_first(thread); |
PEG_TRACE_CSTRING(TRC_THREAD, Tracer::LEVEL1, |
|
"Thread: ERROR - unable to create a thread key"); |
|
Thread::_key_error = true; |
|
return -1; |
} | } |
} | } |
| |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return numThreadsCleanedUp; |
return 0; |
} | } |
| |
void ThreadPool::_cleanupThread(Thread* th) |
Thread *Thread::getCurrent() |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::cleanupThread"); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent"); |
|
if (Thread::initializeKey() != 0) |
// Set the "work func" and "work parm" to 0 so _loop() knows to exit. |
|
th->delete_tsd("work func"); |
|
th->put_tsd( |
|
"work func", NULL, |
|
sizeof(PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)), |
|
(void *) 0); |
|
th->delete_tsd("work parm"); |
|
th->put_tsd("work parm", NULL, sizeof(void *), 0); |
|
|
|
// signal the thread's sleep semaphore to awaken it |
|
Semaphore* sleep_sem = (Semaphore *)th->reference_tsd("sleep sem"); |
|
PEGASUS_ASSERT(sleep_sem != 0); |
|
sleep_sem->signal(); |
|
th->dereference_tsd(); |
|
|
|
th->join(); |
|
delete th; |
|
|
|
PEG_METHOD_EXIT(); |
|
} |
|
|
|
Boolean ThreadPool::check_time(struct timeval *start, struct timeval *interval) |
|
{ | { |
// never time out if the interval is zero |
return NULL; |
if(interval && interval->tv_sec == 0 && interval->tv_usec == 0) |
|
return false; |
|
|
|
struct timeval now , finish , remaining ; |
|
Uint32 usec; |
|
pegasus_gettimeofday(&now); |
|
/* remove valgrind error */ |
|
pegasus_gettimeofday(&remaining); |
|
|
|
|
|
finish.tv_sec = start->tv_sec + interval->tv_sec; |
|
usec = start->tv_usec + interval->tv_usec; |
|
finish.tv_sec += (usec / 1000000); |
|
usec %= 1000000; |
|
finish.tv_usec = usec; |
|
|
|
if ( timeval_subtract(&remaining, &finish, &now) ) |
|
return true; |
|
else |
|
return false; |
|
} | } |
|
|
PEGASUS_THREAD_RETURN ThreadPool::_undertaker( void *parm ) |
|
{ |
|
|
|
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_undertaker"); |
|
exit_thread((PEGASUS_THREAD_RETURN)1); |
|
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return (PEGASUS_THREAD_RETURN)1; |
return (Thread *) TSDKey::get_thread_specific(_platform_thread_key); |
} | } |
| |
PEGASUS_THREAD_RETURN ThreadPool::_graveyard(Thread *t) |
void Thread::setCurrent(Thread * thrd) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_graveyard"); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent"); |
ThreadPool *pool = (ThreadPool *)t->get_parm(); |
if (Thread::initializeKey() == 0) |
if(pool == 0 ) { |
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
|
"Could not obtain the pool information from the Thread.", t); |
|
|
|
return (PEGASUS_THREAD_RETURN)1; |
|
} |
|
if (pool->_pool.exists(t)) |
|
{ | { |
if (pool->_pool.remove( (void *) t) != 0) |
if (TSDKey:: |
|
set_thread_specific(Thread::_platform_thread_key, |
|
(void *) thrd) == 0) |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
PEG_TRACE_CSTRING(TRC_THREAD, Tracer::LEVEL4, |
"Moving thread %p", t); |
"Successful set Thread * into thread specific storage"); |
/* We are moving the thread to the _running queue b/c |
|
_only_ kill_dead_threads has enough logic to take care |
|
of cleaning up the threads.*/ |
|
|
|
pool->_running.insert_first( t ); |
|
} | } |
else | else |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
PEG_TRACE_CSTRING(TRC_THREAD, Tracer::LEVEL1, |
"Could not move Thread %p from _pool to _runing queue.", t); |
"ERROR: error setting Thread * into thread specific storage"); |
return (PEGASUS_THREAD_RETURN)1; |
|
} |
|
} |
|
|
|
else if (pool->_running.exists(t)) |
|
{ |
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
|
"Thread %p is on _running queue. Letting kill_dead_threads take care of the problem.", t); |
|
return (PEGASUS_THREAD_RETURN)1; |
|
} | } |
if (!pool->_dead.exists(t)) |
|
{ |
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
|
"Thread is not on any queue! Moving it to the running queue."); |
|
pool->_running.insert_first( t ); |
|
} | } |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return (PEGASUS_THREAD_RETURN)0; |
|
} |
|
|
|
void ThreadPool::_sleep_sem_del(void *p) |
|
{ |
|
if(p != 0) |
|
{ |
|
delete (Semaphore *)p; |
|
} |
|
} | } |
| |
void ThreadPool::_check_deadlock(struct timeval *start) throw(Deadlock) |
AcceptLanguageList *Thread::getLanguages() |
{ | { |
if (true == check_time(start, &_deadlock_detect)) |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages"); |
throw Deadlock(pegasus_thread_self()); |
|
return; |
|
} |
|
|
|
| |
Boolean ThreadPool::_check_deadlock_no_throw(struct timeval *start) |
Thread *curThrd = Thread::getCurrent(); |
{ |
if (curThrd == NULL) |
return(check_time(start, &_deadlock_detect)); |
return NULL; |
|
AcceptLanguageList *acceptLangs = |
|
(AcceptLanguageList *) curThrd->reference_tsd("acceptLanguages"); |
|
curThrd->dereference_tsd(); |
|
PEG_METHOD_EXIT(); |
|
return acceptLangs; |
} | } |
| |
Boolean ThreadPool::_check_dealloc(struct timeval *start) |
void Thread::setLanguages(const AcceptLanguageList& langs) |
{ | { |
return(check_time(start, &_deallocate_wait)); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages"); |
} |
|
| |
Thread *ThreadPool::_init_thread(void) throw(IPCException) |
Thread *currentThrd = Thread::getCurrent(); |
|
if (currentThrd != NULL) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_init_thread"); |
AutoPtr<AcceptLanguageList> langsCopy(new AcceptLanguageList(langs)); |
Thread *th = (Thread *) new Thread(_loop, this, false); |
|
// allocate a sleep semaphore and pass it in the thread context |
|
// initial count is zero, loop function will sleep until |
|
// we signal the semaphore |
|
Semaphore *sleep_sem = (Semaphore *) new Semaphore(0); |
|
th->put_tsd("sleep sem", &_sleep_sem_del, sizeof(Semaphore), (void *)sleep_sem); |
|
|
|
struct timeval *dldt = (struct timeval *) ::operator new(sizeof(struct timeval)); |
|
pegasus_gettimeofday(dldt); |
|
| |
th->put_tsd("deadlock timer", thread_data::default_delete, sizeof(struct timeval), (void *)dldt); |
// deletes the old tsd and creates a new one |
// thread will enter _loop(void *) and sleep on sleep_sem until we signal it |
currentThrd->put_tsd( |
|
"acceptLanguages", |
|
language_delete, |
|
sizeof (AcceptLanguageList *), |
|
langsCopy.get()); |
| |
if (th->run() != PEGASUS_THREAD_OK) |
langsCopy.release(); |
{ |
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
|
"Could not create thread. Error code is %d.", errno); |
|
delete th; |
|
return 0; |
|
} | } |
_current_threads++; |
|
pegasus_yield(); |
|
| |
PEG_METHOD_EXIT(); | PEG_METHOD_EXIT(); |
return th; |
|
} | } |
| |
void ThreadPool::_link_pool(Thread *th) throw(IPCException) |
void Thread::clearLanguages() |
{ | { |
if(th == 0) |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages"); |
{ |
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
Thread *currentThrd = Thread::getCurrent(); |
"ThreadPool::_link_pool: Thread pointer is null."); |
if (currentThrd != NULL) |
throw NullPointer(); |
|
} |
|
try |
|
{ |
|
_pool.insert_first(th); |
|
} |
|
catch(...) |
|
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
// deletes the old tsd |
"ThreadPool::_link_pool: _pool.insert_first failed."); |
currentThrd->delete_tsd("acceptLanguages"); |
} | } |
|
|
|
PEG_METHOD_EXIT(); |
} | } |
| |
|
// ATTN: not sure where to put this! |
|
#ifdef PEGASUS_ZOS_SECURITY |
|
bool isEnhancedSecurity = 99; |
|
#endif |
| |
PEGASUS_NAMESPACE_END | PEGASUS_NAMESPACE_END |
|
|