version 1.66, 2004/07/26 23:45:11
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version 1.91, 2006/08/09 21:12:42
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//%2003//////////////////////////////////////////////////////////////////////// |
//%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. |
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L. P.; | // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L. P.; |
// IBM Corp.; EMC Corporation, The Open Group. | // IBM Corp.; EMC Corporation, The Open Group. |
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// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; |
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// 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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// added nsk platform support | // added nsk platform support |
// Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com) | // Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com) |
// Amit K Arora, IBM (amita@in.ibm.com) for PEP#101 | // Amit K Arora, IBM (amita@in.ibm.com) for PEP#101 |
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// Sean Keenan, Hewlett-Packard Company (sean.keenan@hp.com) |
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// David Dillard, VERITAS Software Corp. |
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// (david.dillard@veritas.com) |
// | // |
//%///////////////////////////////////////////////////////////////////////////// | //%///////////////////////////////////////////////////////////////////////////// |
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#include "Thread.h" | #include "Thread.h" |
#include <Pegasus/Common/IPC.h> |
#include <exception> |
#include <Pegasus/Common/Tracer.h> | #include <Pegasus/Common/Tracer.h> |
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#include "Time.h" |
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#if defined(PEGASUS_OS_TYPE_WINDOWS) |
PEGASUS_USING_STD; |
# 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_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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{ |
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if( data != NULL) |
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{ | { |
AutoPtr<AcceptLanguages> al(static_cast<AcceptLanguages *>(data)); |
void *(PEGASUS_THREAD_CDECL * start) (void *); |
} |
void *arg; |
} |
}; |
// l10n end |
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Boolean Thread::_signals_blocked = false; |
extern "C" void *_start_wrapper(void *arg_) |
// l10n |
{ |
#ifndef PEGASUS_OS_ZOS |
StartWrapperArg *arg = (StartWrapperArg *) arg_; |
PEGASUS_THREAD_KEY_TYPE Thread::_platform_thread_key = -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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delete arg; |
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// for non-native implementations |
return return_value; |
#ifndef PEGASUS_THREAD_CLEANUP_NATIVE |
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void Thread::cleanup_push( void (*routine)(void *), void *parm) throw(IPCException) |
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{ |
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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() |
{ | { |
AutoPtr<cleanup_handler> cu ; |
_cancelled = true; |
try |
pthread_cancel(_handle.thid.tt_handle()); |
{ |
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cu.reset(_cleanup.remove_first()); |
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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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} | } |
if(execute == true) |
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cu->execute(); |
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} |
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#endif |
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//thread_data *Thread::put_tsd(const Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value) throw(IPCException) |
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void Thread::test_cancel() |
#ifndef PEGASUS_THREAD_EXIT_NATIVE |
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void Thread::exit_self(PEGASUS_THREAD_RETURN exit_code) |
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{ |
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// execute the cleanup stack and then return |
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while( _cleanup.count() ) |
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{ |
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try |
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{ |
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cleanup_pop(true); |
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} |
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catch(IPCException&) |
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{ | { |
PEGASUS_ASSERT(0); |
#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
break; |
pthread_testintr(); |
} |
#else |
} |
pthread_testcancel(); |
_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) |
Boolean Thread::is_cancelled(void) |
{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Thread: able to create a thread key"); |
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Thread::_key_initialized = true; |
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} |
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else |
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{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
return _cancelled; |
"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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} |
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} | } |
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PEG_METHOD_EXIT(); |
void Thread::thread_switch() |
return 0; |
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} |
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Thread * Thread::getCurrent() |
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{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent"); |
#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
if (Thread::initializeKey() != 0) |
pthread_yield(NULL); |
{ |
#else |
return NULL; |
sched_yield(); |
} |
#endif |
PEG_METHOD_EXIT(); |
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return (Thread *)pegasus_get_thread_specific(_platform_thread_key); |
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} | } |
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void Thread::setCurrent(Thread * thrd) |
/* |
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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() |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent"); |
pthread_kill(_handle.thid.tt_handle(), SIGSTOP); |
if (Thread::initializeKey() == 0) |
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{ |
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if (pegasus_set_thread_specific(Thread::_platform_thread_key, |
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(void *) thrd) == 0) |
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{ |
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Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
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"Successful set Thread * into thread specific storage"); |
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} | } |
else |
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void Thread::resume() |
{ | { |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
pthread_kill(_handle.thid.tt_handle(), SIGCONT); |
"ERROR: got 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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} | } |
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#endif |
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AcceptLanguages * Thread::getLanguages() |
void Thread::sleep(Uint32 msec) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages"); |
Threads::sleep(msec); |
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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 |
void Thread::join(void) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages"); |
if (!_is_detached && Threads::id(_handle.thid) != 0) |
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pthread_join(_handle.thid.tt_handle(), &_exit_code); |
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Thread * currentThrd = Thread::getCurrent(); |
Threads::clear(_handle.thid); |
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(AcceptLanguages *), |
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langs); |
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} | } |
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PEG_METHOD_EXIT(); |
void Thread::thread_init(void) |
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{ |
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#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
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pthread_setintr(PTHREAD_INTR_ENABLE); |
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pthread_setintrtype(PTHREAD_INTR_ASYNCHRONOUS); |
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#else |
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pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL); |
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pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL); |
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#endif |
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_cancel_enabled = true; |
} | } |
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void Thread::clearLanguages() //l10n |
void Thread::detach(void) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages"); |
_is_detached = true; |
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#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
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pthread_t thread_id=_handle.thid.tt_handle(); |
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pthread_detach(&thread_id); |
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#else |
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pthread_detach(_handle.thid.tt_handle()); |
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#endif |
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} |
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Thread * currentThrd = Thread::getCurrent(); |
ThreadStatus Thread::run() |
if (currentThrd != NULL) |
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{ | { |
// deletes the old tsd |
StartWrapperArg *arg = new StartWrapperArg; |
currentThrd->delete_tsd("acceptLanguages"); |
arg->start = _start; |
} |
arg->arg = this; |
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PEG_METHOD_EXIT(); |
Threads::Type type = _is_detached ? Threads::DETACHED : Threads::JOINABLE; |
} |
int rc = Threads::create(_handle.thid, type, _start_wrapper, arg); |
// l10n end |
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#if 0 |
// On Linux distributions released prior 2005, the implementation of |
// two special synchronization classes for ThreadPool |
// Native POSIX Thread Library returns ENOMEM instead of EAGAIN when |
// |
// 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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class timed_mutex |
if ((rc == EAGAIN) || (rc == ENOMEM)) |
{ |
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public: |
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timed_mutex(Mutex* mut, int msec) |
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:_mut(mut) |
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{ | { |
_mut->timed_lock(msec, pegasus_thread_self()); |
Threads::clear(_handle.thid); |
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delete arg; |
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return PEGASUS_THREAD_INSUFFICIENT_RESOURCES; |
} | } |
~timed_mutex(void) |
else if (rc != 0) |
{ |
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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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{ | { |
public: |
Threads::clear(_handle.thid); |
try_mutex(Mutex* mut) |
delete arg; |
:_mut(mut) |
return PEGASUS_THREAD_SETUP_FAILURE; |
{ |
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_mut->try_lock(pegasus_thread_self()); |
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} | } |
~try_mutex(void) |
return PEGASUS_THREAD_OK; |
{ |
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_mut->unlock(); |
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} | } |
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Mutex* _mut; |
static sigset_t *block_signal_mask(sigset_t * sig) |
}; |
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class auto_int |
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{ |
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public: |
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auto_int(AtomicInt* num) |
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: _int(num) |
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{ | { |
_int->operator++(); |
sigemptyset(sig); |
} |
// should not be used for main() |
~auto_int(void) |
sigaddset(sig, SIGHUP); |
{ |
sigaddset(sig, SIGINT); |
_int->operator--(); |
// maybe useless, since KILL can't be blocked according to POSIX |
} |
sigaddset(sig, SIGKILL); |
AtomicInt *_int; |
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}; |
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sigaddset(sig, SIGABRT); |
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sigaddset(sig, SIGALRM); |
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sigaddset(sig, SIGPIPE); |
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AtomicInt _idle_control; |
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DQueue<ThreadPool> ThreadPool::_pools(true); |
// 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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} |
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void ThreadPool::kill_idle_threads(void) |
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) |
{ | { |
static struct timeval now, last = {0, 0}; |
Threads::clear(_handle.thid); |
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} |
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pegasus_gettimeofday(&now); |
Thread::~Thread() |
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 | try |
{ | { |
p->kill_dead_threads(); |
join(); |
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empty_tsd(); |
} | } |
catch(...) | catch(...) |
{ | { |
} |
// Do not allow the destructor to throw an exception |
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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#endif /* PEGASUS_HAVE_PTHREADS */ |
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ThreadPool::ThreadPool(Sint16 initial_size, |
//============================================================================== |
const Sint8 *key, |
// |
Sint16 min, |
// Windows Threads Implementation: |
Sint16 max, |
// |
struct timeval & alloc_wait, |
//============================================================================== |
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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{ |
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_allocate_wait.tv_sec = alloc_wait.tv_sec; |
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_allocate_wait.tv_usec = alloc_wait.tv_usec; |
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_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; |
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for(i = 0; i < initial_size; i++) |
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{ |
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_link_pool(_init_thread()); |
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} |
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_pools.insert_last(this); |
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} |
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// Note: <<< Fri Oct 17 09:19:03 2003 mdd >>> |
#if defined(PEGASUS_HAVE_WINDOWS_THREADS) |
// the pegasus_yield() calls that preceed each th->join() are to |
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// give a thread on the running list a chance to reach a cancellation |
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// point before the join |
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ThreadPool::~ThreadPool(void) |
ThreadStatus Thread::run(void) |
{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::~ThreadPool"); |
// Note: A Win32 thread ID is not the same thing as a pthread ID. |
try |
// Win32 threads have both a thread ID and a handle. The handle |
{ |
// is used in the wait functions, etc. |
// Set the dying flag so all thread know the destructor has been entered |
// So _handle.thid is actually the thread handle. |
_dying++; |
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// remove from the global pools list |
unsigned threadid = 0; |
_pools.remove(this); |
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// start with idle threads. |
ThreadType tt; |
Thread *th = 0; |
tt.handle = (HANDLE) _beginthreadex(NULL, 0, _start, this, 0, &threadid); |
th = _pool.remove_first(); |
_handle.thid = tt; |
Semaphore* sleep_sem; |
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while(th != 0) |
if (Threads::id(_handle.thid) == 0) |
{ | { |
sleep_sem = (Semaphore *)th->reference_tsd("sleep sem"); |
if (errno == EAGAIN) |
PEGASUS_ASSERT(sleep_sem != 0); |
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if(sleep_sem == 0) |
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{ | { |
th->dereference_tsd(); |
return PEGASUS_THREAD_INSUFFICIENT_RESOURCES; |
} | } |
else | else |
{ | { |
// Signal to get the thread out of the work loop. |
return PEGASUS_THREAD_SETUP_FAILURE; |
sleep_sem->signal(); |
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// Signal to get the thread past the end. See the comment |
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// "wait to be awakend by the thread pool destructor" |
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// Note: the current implementation of Thread for Windows |
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// does not implement "pthread" cancelation points so this |
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// is needed. |
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sleep_sem->signal(); |
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th->dereference_tsd(); |
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th->cancel(); |
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th->join(); |
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delete th; |
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} |
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th = _pool.remove_first(); |
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} |
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while(_idle_control.value()) |
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pegasus_yield(); |
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th = _dead.remove_first(); |
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while(th != 0) |
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{ |
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sleep_sem = (Semaphore *)th->reference_tsd("sleep sem"); |
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PEGASUS_ASSERT(sleep_sem != 0); |
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if(sleep_sem == 0) |
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{ |
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th->dereference_tsd(); |
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} | } |
else |
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{ |
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//ATTN-DME-P3-20030322: _dead queue processing in |
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//ThreadPool::~ThreadPool is inconsistent with the |
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//processing in kill_dead_threads. Is this correct? |
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// signal the thread's sleep semaphore |
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sleep_sem->signal(); |
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sleep_sem->signal(); |
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th->dereference_tsd(); |
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th->cancel(); |
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th->join(); |
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delete th; |
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} | } |
th = _dead.remove_first(); |
return PEGASUS_THREAD_OK; |
} | } |
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void Thread::cancel(void) |
{ | { |
th = _running.remove_first(); |
_cancelled = true; |
while(th != 0) |
} |
{ |
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// signal the thread's sleep semaphore |
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sleep_sem = (Semaphore *)th->reference_tsd("sleep sem"); |
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PEGASUS_ASSERT(sleep_sem != 0); |
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if(sleep_sem == 0 ) |
void Thread::test_cancel(void) |
{ | { |
th->dereference_tsd(); |
if (_cancel_enabled && _cancelled) |
} |
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else |
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{ | { |
sleep_sem->signal(); |
exit_self(0); |
sleep_sem->signal(); |
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th->dereference_tsd(); |
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th->cancel(); |
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pegasus_yield(); |
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th->join(); |
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delete th; |
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} |
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th = _running.remove_first(); |
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} |
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} | } |
} | } |
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catch(...) |
Boolean Thread::is_cancelled(void) |
{ | { |
} |
return _cancelled; |
} | } |
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// make this static to the class |
void Thread::thread_switch(void) |
PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL ThreadPool::_loop(void *parm) |
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{ | { |
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::_loop"); |
Sleep(0); |
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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 |
void Thread::sleep(Uint32 milliseconds) |
// 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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if(pool == 0 ) |
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{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
Sleep(milliseconds); |
"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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if(pool->_dying.value()) |
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{ |
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Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
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"ThreadPool::_loop: ThreadPool is dying(1)"); |
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PEG_METHOD_EXIT(); |
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return((PEGASUS_THREAD_RETURN)0); |
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} | } |
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Semaphore *sleep_sem = 0; |
void Thread::join(void) |
Semaphore *blocking_sem = 0; |
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struct timeval *deadlock_timer = 0; |
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try |
|
{ | { |
sleep_sem = (Semaphore *)myself->reference_tsd("sleep sem"); |
if (Threads::id(_handle.thid) != 0) |
myself->dereference_tsd(); |
|
deadlock_timer = (struct timeval *)myself->reference_tsd("deadlock timer"); |
|
myself->dereference_tsd(); |
|
} |
|
|
|
catch(...) |
|
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
if (!_is_detached) |
"ThreadPool::_loop: Failure getting sleep_sem or deadlock_timer"); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} |
|
|
|
if(sleep_sem == 0 || deadlock_timer == 0) |
|
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
if (!_cancelled) |
"ThreadPool::_loop: sleep_sem or deadlock_timer are null."); |
{ |
PEG_METHOD_EXIT(); |
// Emulate the unix join api. Caller sleeps until thread is |
return((PEGASUS_THREAD_RETURN)0); |
// done. |
|
WaitForSingleObject(_handle.thid.handle, INFINITE); |
} | } |
|
else |
while(1) |
|
{ | { |
if(pool->_dying.value()) |
// Currently this is the only way to ensure this code does |
break; |
// not |
|
// hang forever. |
try |
if (WaitForSingleObject(_handle.thid.handle, 10000) == |
|
WAIT_TIMEOUT) |
{ | { |
sleep_sem->wait(); |
TerminateThread(_handle.thid.handle, 0); |
} | } |
catch(IPCException& ) |
|
{ |
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::_loop: failure on sleep_sem->wait()."); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} | } |
| |
// when we awaken we reside on the running queue, not the pool queue |
DWORD exit_code = 0; |
|
GetExitCodeThread(_handle.thid.handle, &exit_code); |
PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *_work)(void *) = 0; |
_exit_code = (ThreadReturnType) exit_code; |
void *parm = 0; |
} |
|
|
try |
|
{ |
|
_work = (PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)) \ |
|
myself->reference_tsd("work func"); |
|
myself->dereference_tsd(); |
|
parm = myself->reference_tsd("work parm"); |
|
myself->dereference_tsd(); |
|
blocking_sem = (Semaphore *)myself->reference_tsd("blocking sem"); |
|
myself->dereference_tsd(); |
|
| |
|
CloseHandle(_handle.thid.handle); |
|
Threads::clear(_handle.thid); |
} | } |
catch(IPCException &) |
|
{ |
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::_loop: Failure accessing work func, work parm, or blocking sem."); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} | } |
| |
if(_work == 0) |
void Thread::thread_init(void) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
_cancel_enabled = true; |
"ThreadPool::_loop: work func is null."); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} | } |
| |
if(_work == |
void Thread::detach(void) |
(PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)) &_undertaker) |
|
{ | { |
PEG_METHOD_EXIT(); |
_is_detached = true; |
_work(parm); |
|
} | } |
| |
gettimeofday(deadlock_timer, NULL); |
Thread::Thread(ThreadReturnType(PEGASUS_THREAD_CDECL * start) (void *), |
|
void *parameter, |
if (pool->_dying.value() == 0) |
Boolean detached):_is_detached(detached), |
|
_cancel_enabled(true), |
|
_cancelled(false), |
|
_start(start), _cleanup(), _tsd(), _thread_parm(parameter), _exit_code(0) |
{ | { |
try |
Threads::clear(_handle.thid); |
{ |
|
_work(parm); |
|
} |
|
catch(Exception & e) |
|
{ |
|
PEG_TRACE_STRING(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
String("Exception from _work in ThreadPool::_loop: ") + |
|
e.getMessage()); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} |
|
catch(...) |
|
{ |
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::_loop: execution of _work failed."); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} | } |
} |
|
|
|
// put myself back onto the available list |
|
try |
|
{ |
|
if(pool->_dying.value() == 0) |
|
{ |
|
gettimeofday(deadlock_timer, NULL); |
|
if( blocking_sem != 0 ) |
|
blocking_sem->signal(); |
|
| |
// If we are not on _running then ~ThreadPool has removed |
Thread::~Thread() |
// us and now "owns" our pointer. |
|
if ( pool->_running.remove((void *)myself) != 0 ) |
|
{ | { |
pool->_pool.insert_first(myself); |
try |
} |
|
else |
|
{ |
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::_loop: Failed to remove thread from running queue."); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} |
|
} |
|
else |
|
{ | { |
PEG_METHOD_EXIT(); |
join(); |
return((PEGASUS_THREAD_RETURN)0); |
empty_tsd(); |
} |
|
} | } |
catch(...) | catch(...) |
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::_loop: Adding thread to idle pool failed."); |
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} | } |
|
|
} |
|
|
|
// TODO: Why is this needed? Why not just continue? |
|
// wait to be awakend by the thread pool destructor |
|
//sleep_sem->wait(); |
|
|
|
myself->test_cancel(); |
|
|
|
PEG_METHOD_EXIT(); |
|
return((PEGASUS_THREAD_RETURN)0); |
|
} | } |
| |
Boolean ThreadPool::allocate_and_awaken(void *parm, |
#endif /* PEGASUS_HAVE_WINDOWS_THREADS */ |
PEGASUS_THREAD_RETURN \ |
|
(PEGASUS_THREAD_CDECL *work)(void *), |
|
Semaphore *blocking) |
|
throw(IPCException) |
|
{ |
|
PEG_METHOD_ENTER(TRC_THREAD, "ThreadPool::allocate_and_awaken"); |
|
| |
// 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: |
|
// |
|
//============================================================================== |
| |
try |
void thread_data::default_delete(void *data) |
{ |
|
if (_dying.value()) |
|
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
if (data != NULL) |
"ThreadPool::allocate_and_awaken: ThreadPool is dying(1)."); |
::operator delete(data); |
// ATTN: Error result has not yet been defined |
|
return true; |
|
} | } |
struct timeval start; |
|
gettimeofday(&start, NULL); |
|
Thread *th = 0; |
|
|
|
th = _pool.remove_first(); |
|
| |
if (th == 0) |
void language_delete(void *data) |
{ | { |
// will throw an IPCException& |
if (data != NULL) |
_check_deadlock(&start) ; |
|
|
|
if(_max_threads == 0 || _current_threads < _max_threads) |
|
{ | { |
th = _init_thread(); |
AutoPtr < AcceptLanguageList > al(static_cast < |
} |
AcceptLanguageList * >(data)); |
} | } |
|
|
if (th == 0) |
|
{ |
|
// ATTN-DME-P3-20031103: This trace message should not be |
|
// be labeled TRC_DISCARDED_DATA, because it does not |
|
// necessarily imply that a failure has occurred. However, |
|
// this label is being used temporarily to help isolate |
|
// the cause of client timeout problems. |
|
|
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::allocate_and_awaken: Insufficient resources: " |
|
" pool = %s, running threads = %d, idle threads = %d, dead threads = %d ", |
|
_key, _running.count(), _pool.count(), _dead.count()); |
|
return false; |
|
} | } |
| |
// initialize the thread data with the work function and parameters |
Boolean Thread::_signals_blocked = false; |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
#ifndef PEGASUS_OS_ZOS |
"Initializing thread with work function and parameters: parm = %p", |
TSDKeyType Thread::_platform_thread_key = TSDKeyType(-1); |
parm); |
#else |
|
TSDKeyType Thread::_platform_thread_key; |
|
#endif |
|
Boolean Thread::_key_initialized = false; |
|
Boolean Thread::_key_error = false; |
| |
th->delete_tsd("work func"); |
void Thread::cleanup_push(void (*routine) (void *), void *parm) |
th->put_tsd("work func", NULL, |
|
sizeof( PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)), |
|
(void *)work); |
|
th->delete_tsd("work parm"); |
|
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"); |
|
|
|
if(sleep_sem == 0) |
|
{ |
|
th->dereference_tsd(); |
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::allocate_and_awaken: thread data is corrupted."); |
|
PEG_METHOD_EXIT(); |
|
throw NullPointer(); |
|
} |
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, "Signal thread to awaken"); |
|
sleep_sem->signal(); |
|
th->dereference_tsd(); |
|
} |
|
catch (...) |
|
{ | { |
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
AutoPtr < cleanup_handler > cu(new cleanup_handler(routine, parm)); |
"ThreadPool::allocate_and_awaken: Operation Failed."); |
_cleanup.insert_front(cu.get()); |
PEG_METHOD_EXIT(); |
cu.release(); |
// ATTN: Error result has not yet been defined |
return; |
return true; |
|
} |
|
PEG_METHOD_EXIT(); |
|
return true; |
|
} | } |
| |
// caller is responsible for only calling this routine during slack periods |
void Thread::cleanup_pop(Boolean execute) |
// 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) |
|
throw(IPCException) |
|
{ | { |
// Since the kill_dead_threads, ThreadPool or allocate_and_awaken |
AutoPtr < cleanup_handler > cu; |
// manipulate the threads on the ThreadPool queues, they should never |
|
// be allowed to run at the same time. |
|
|
|
// << Thu Oct 23 14:41:02 2003 mdd >> |
|
// not true, the queues are thread safe. they are syncrhonized. |
|
|
|
auto_int do_not_destruct(&_idle_control); |
|
|
|
try | try |
{ | { |
if (_dying.value()) |
cu.reset(_cleanup.remove_front()); |
{ |
|
return 0; |
|
} | } |
|
catch(IPCException &) |
struct timeval now; |
|
gettimeofday(&now, NULL); |
|
Uint32 bodies = 0; |
|
|
|
// first go thread the dead q and clean it up as much as possible |
|
try |
|
{ |
|
while(_dying.value() == 0 && _dead.count() > 0) |
|
{ |
|
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, "ThreadPool:: removing and joining dead thread"); |
|
Thread *dead = _dead.remove_first(); |
|
|
|
if(dead ) |
|
{ | { |
dead->join(); |
PEGASUS_ASSERT(0); |
delete dead; |
|
} |
|
} |
|
} | } |
catch(...) |
if (execute == true) |
{ |
cu->execute(); |
} | } |
| |
if (_dying.value()) |
|
{ |
|
return 0; |
|
} |
|
| |
DQueue<Thread> * map[2] = |
//thread_data *Thread::put_tsd(const Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value) |
{ |
|
&_pool, &_running |
|
}; |
|
| |
| |
DQueue<Thread> *q = 0; |
void Thread::exit_self(ThreadReturnType exit_code) |
int i = 0; |
|
AtomicInt needed(0); |
|
Thread *th = 0; |
|
internal_dq idq; |
|
|
|
#ifdef PEGASUS_KILL_LONG_RUNNING_THREADS |
|
// Defining PEGASUS_KILL_LONG_RUNNING_THREADS causes the thread pool |
|
// to kill threads that are on the _running queue longer than the |
|
// _deadlock_detect time interval specified for the thread pool. |
|
// Cancelling long-running threads has proven to be problematic and |
|
// may cause a crash depending on the state of the thread when it is |
|
// killed. Use this option with care. |
|
for( ; i < 2; i++) |
|
#else |
|
for( ; i < 1; i++) |
|
#endif |
|
{ | { |
q = map[i]; |
#if defined(PEGASUS_PLATFORM_HPUX_ACC) || \ |
if(q->count() > 0 ) |
defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) |
|
// NOTE: pthread_exit exhibits unusual behavior on RHEL 3 U2, as |
|
// documented in Bugzilla 3836. Where feasible, it may be advantageous |
|
// to avoid using this function. |
|
pthread_exit(exit_code); |
|
#else |
|
// execute the cleanup stack and then return |
|
while (_cleanup.size()) |
{ | { |
try | try |
{ | { |
q->try_lock(); |
cleanup_pop(true); |
} | } |
catch(...) |
catch(IPCException &) |
{ | { |
return bodies; |
PEGASUS_ASSERT(0); |
|
break; |
} | } |
|
|
struct timeval dt = { 0, 0 }; |
|
struct timeval *dtp; |
|
|
|
th = q->next(th); |
|
while (th != 0 ) |
|
{ |
|
try |
|
{ |
|
dtp = (struct timeval *)th->try_reference_tsd("deadlock timer"); |
|
} | } |
catch(...) |
_exit_code = exit_code; |
{ |
Threads::exit(exit_code); |
q->unlock(); |
Threads::clear(_handle.thid); |
return bodies; |
#endif |
} | } |
| |
if(dtp != 0) |
Sint8 Thread::initializeKey() |
{ | { |
memcpy(&dt, dtp, sizeof(struct timeval)); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::initializeKey"); |
} |
if (!Thread::_key_initialized) |
th->dereference_tsd(); |
|
struct timeval deadlock_timeout; |
|
Boolean too_long; |
|
if( i == 0) |
|
{ | { |
too_long = check_time(&dt, get_deallocate_wait(&deadlock_timeout)); |
if (Thread::_key_error) |
} |
|
else |
|
{ | { |
too_long = check_time(&dt, get_deadlock_detect(&deadlock_timeout)); |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
|
"Thread: ERROR - thread key error"); |
|
return -1; |
} | } |
| |
if( true == too_long) |
if (TSDKey::create(&Thread::_platform_thread_key) == 0) |
{ |
|
// if we are deallocating from the pool, escape if we are |
|
// down to the minimum thread count |
|
_current_threads--; |
|
if( _current_threads.value() < (Uint32)_min_threads ) |
|
{ |
|
if( i == 0) |
|
{ | { |
_current_threads++; |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
th = q->next(th); |
"Thread: able to create a thread key"); |
continue; |
Thread::_key_initialized = true; |
} | } |
else | else |
{ | { |
// we are killing a hung thread and we will drop below the |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
// minimum. create another thread to make up for the one |
"Thread: ERROR - unable to create a thread key"); |
// we are about to kill |
Thread::_key_error = true; |
needed++; |
return -1; |
} | } |
} | } |
| |
th = q->remove_no_lock((void *)th); |
PEG_METHOD_EXIT(); |
idq.insert_first((void*)th); |
return 0; |
} |
|
th = q->next(th); |
|
} |
|
q->unlock(); |
|
} | } |
| |
th = (Thread*)idq.remove_last(); |
Thread *Thread::getCurrent() |
while(th != 0) |
|
{ |
|
if( i == 0 ) |
|
{ | { |
th->delete_tsd("work func"); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getCurrent"); |
th->put_tsd("work func", NULL, |
if (Thread::initializeKey() != 0) |
sizeof( PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *)(void *)), |
|
(void *)&_undertaker); |
|
th->delete_tsd("work parm"); |
|
th->put_tsd("work parm", NULL, sizeof(void *), th); |
|
|
|
// signal the thread's sleep semaphore to awaken it |
|
Semaphore *sleep_sem = (Semaphore *)th->reference_tsd("sleep sem"); |
|
PEGASUS_ASSERT(sleep_sem != 0); |
|
|
|
bodies++; |
|
th->dereference_tsd(); |
|
// Putting thread on _dead queue delays availability to others |
|
//_dead.insert_first(th); |
|
sleep_sem->signal(); |
|
th->join(); // Note: Clean up the thread here rather than |
|
delete th; // leave it sitting unused on the _dead queue |
|
th = 0; |
|
} |
|
else |
|
{ | { |
// deadlocked threads |
return NULL; |
Tracer::trace(TRC_THREAD, Tracer::LEVEL2, |
|
"A thread has run longer than %u seconds and " |
|
"will be cancelled.", |
|
Uint32(_deadlock_detect.tv_sec)); |
|
Logger::put_l(Logger::ERROR_LOG, System::CIMSERVER, |
|
Logger::SEVERE, |
|
"Common.Thread.CANCEL_LONG_RUNNING_THREAD", |
|
"A thread has run longer than {0} seconds and " |
|
"will be cancelled.", |
|
Uint32(_deadlock_detect.tv_sec)); |
|
th->cancel(); |
|
delete th; |
|
} |
|
th = (Thread*)idq.remove_last(); |
|
} | } |
|
PEG_METHOD_EXIT(); |
|
return (Thread *) TSDKey::get_thread_specific(_platform_thread_key); |
} | } |
| |
while (needed.value() > 0) { |
void Thread::setCurrent(Thread * thrd) |
_link_pool(_init_thread()); |
|
needed--; |
|
pegasus_sleep(0); |
|
} |
|
return bodies; |
|
} |
|
catch (...) |
|
{ | { |
} |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setCurrent"); |
return 0; |
if (Thread::initializeKey() == 0) |
} |
|
|
|
|
|
Boolean ThreadPool::check_time(struct timeval *start, struct timeval *interval) |
|
{ | { |
// never time out if the interval is zero |
if (TSDKey:: |
if(interval && interval->tv_sec == 0 && interval->tv_usec == 0) |
set_thread_specific(Thread::_platform_thread_key, |
return false; |
(void *) thrd) == 0) |
|
|
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 ) |
|
{ | { |
exit_thread((PEGASUS_THREAD_RETURN)1); |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
return (PEGASUS_THREAD_RETURN)1; |
"Successful set Thread * into thread specific storage"); |
} | } |
|
else |
|
|
void ThreadPool::_sleep_sem_del(void *p) |
|
{ |
|
if(p != 0) |
|
{ | { |
delete (Semaphore *)p; |
Tracer::trace(TRC_THREAD, Tracer::LEVEL4, |
|
"ERROR: error setting Thread * into thread specific storage"); |
} | } |
} | } |
|
PEG_METHOD_EXIT(); |
void ThreadPool::_check_deadlock(struct timeval *start) throw(Deadlock) |
|
{ |
|
if (true == check_time(start, &_deadlock_detect)) |
|
throw Deadlock(pegasus_thread_self()); |
|
return; |
|
} | } |
| |
|
AcceptLanguageList *Thread::getLanguages() |
Boolean ThreadPool::_check_deadlock_no_throw(struct timeval *start) |
|
{ | { |
return(check_time(start, &_deadlock_detect)); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::getLanguages"); |
} |
|
| |
Boolean ThreadPool::_check_dealloc(struct timeval *start) |
Thread *curThrd = Thread::getCurrent(); |
{ |
if (curThrd == NULL) |
return(check_time(start, &_deallocate_wait)); |
return NULL; |
|
AcceptLanguageList *acceptLangs = |
|
(AcceptLanguageList *) curThrd->reference_tsd("acceptLanguages"); |
|
curThrd->dereference_tsd(); |
|
PEG_METHOD_EXIT(); |
|
return acceptLangs; |
} | } |
| |
Thread *ThreadPool::_init_thread(void) throw(IPCException) |
void Thread::setLanguages(AcceptLanguageList * langs) // l10n |
{ | { |
Thread *th = (Thread *) new Thread(_loop, this, false); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::setLanguages"); |
// 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); |
|
// thread will enter _loop(void *) and sleep on sleep_sem until we signal it |
|
| |
if (!th->run()) |
Thread *currentThrd = Thread::getCurrent(); |
|
if (currentThrd != NULL) |
{ | { |
delete th; |
// deletes the old tsd and creates a new one |
return 0; |
currentThrd->put_tsd("acceptLanguages", |
|
language_delete, |
|
sizeof (AcceptLanguageList *), langs); |
} | } |
_current_threads++; |
|
pegasus_yield(); |
|
| |
return th; |
PEG_METHOD_EXIT(); |
} | } |
| |
void ThreadPool::_link_pool(Thread *th) throw(IPCException) |
void Thread::clearLanguages() // l10n |
{ |
|
if(th == 0) |
|
{ |
|
Tracer::trace(TRC_DISCARDED_DATA, Tracer::LEVEL2, |
|
"ThreadPool::_link_pool: Thread pointer is null."); |
|
throw NullPointer(); |
|
} |
|
try |
|
{ | { |
_pool.insert_first(th); |
PEG_METHOD_ENTER(TRC_THREAD, "Thread::clearLanguages"); |
} |
|
catch(...) |
Thread *currentThrd = Thread::getCurrent(); |
|
if (currentThrd != NULL) |
{ | { |
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 |
|
|