version 1.1.2.13, 2001/10/03 16:55:03
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version 1.26.2.1, 2002/10/28 15:43:24
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//%///////////-*-c++-*-////////////////////////////////////////////////////// |
//%/-*-c++-*-//////////////////////////////////////////////////////////////////////////// |
// | // |
// Copyright (c) 2000, 2001 The Open group, BMC Software, Tivoli Systems, IBM |
// Copyright (c) 2000, 2001, 2002 BMC Software, Hewlett-Packard Company, IBM, |
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// The Open Group, Tivoli Systems |
// | // |
// 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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#ifndef Pegasus_Thread_h | #ifndef Pegasus_Thread_h |
#define Pegasus_Thread_h | #define Pegasus_Thread_h |
#include <Pegasus/Common/IPC.h> |
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#include <Pegasus/Common/Config.h> | #include <Pegasus/Common/Config.h> |
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#include <Pegasus/Common/IPC.h> |
#include <Pegasus/Common/Exception.h> | #include <Pegasus/Common/Exception.h> |
#include <Pegasus/Common/DQueue.h> | #include <Pegasus/Common/DQueue.h> |
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#include <Pegasus/Common/Linkage.h> |
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PEGASUS_NAMESPACE_BEGIN | PEGASUS_NAMESPACE_BEGIN |
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class PEGASUS_EXPORT cleanup_handler |
class PEGASUS_COMMON_LINKAGE cleanup_handler |
{ | { |
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public: | public: |
cleanup_handler( void (*routine)(void *), void *arg ) : _routine(routine), _arg(arg) {} | cleanup_handler( void (*routine)(void *), void *arg ) : _routine(routine), _arg(arg) {} |
~cleanup_handler() {; } | ~cleanup_handler() {; } |
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private: |
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void execute(void) { _routine(_arg); } |
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cleanup_handler(); |
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void (*_routine)(void *); |
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inline Boolean operator==(const void *key) const | inline Boolean operator==(const void *key) const |
{ | { |
if(key == (void *)_routine) | if(key == (void *)_routine) |
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{ | { |
return(operator==((const void *)b._routine)); | return(operator==((const void *)b._routine)); |
} | } |
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private: |
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void execute(void) { _routine(_arg); } |
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cleanup_handler(); |
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void (*_routine)(void *); |
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void *_arg; | void *_arg; |
PEGASUS_CLEANUP_HANDLE _cleanup_buffer; | PEGASUS_CLEANUP_HANDLE _cleanup_buffer; |
friend class DQueue<class cleanup_handler>; | friend class DQueue<class cleanup_handler>; |
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/////////////////////////////////////////////////////////////////////////////// | /////////////////////////////////////////////////////////////////////////////// |
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class PEGASUS_EXPORT SimpleThread |
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{ |
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public: |
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SimpleThread( PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *start )(void *), |
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void *parameter, Boolean detached ); |
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~SimpleThread(); |
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void run(void); |
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Uint32 threadId(void); |
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// get the user parameter |
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void *get_parm(void); |
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// cancellation must be deferred (not asynchronous) |
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// for user-level threads the thread itself can decide |
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// when it should die. |
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void cancel(void); |
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void kill(int signum); |
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// cancel if there is a pending cancellation request |
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void test_cancel(void); |
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// for user-level threads - put the calling thread |
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// to sleep and jump to the thread scheduler. |
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// platforms with preemptive scheduling and native threads |
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// can define this to be a no-op. |
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// platforms without preemptive scheduling like NetWare |
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// or gnu portable threads will have an existing |
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// routine that can be mapped to this method |
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void thread_switch(void); |
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// suspend this thread |
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void suspend(void) ; |
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// resume this thread |
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void resume(void) ; |
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void sleep(Uint32 msec) ; |
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// block the calling thread until this thread terminates |
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void join( PEGASUS_THREAD_RETURN *ret_val); |
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// stack of functions to be called when thread terminates |
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// will be called last in first out (LIFO) |
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void cleanup_push( void (*routine) (void *), void *parm ); |
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void cleanup_pop(Boolean execute) ; |
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PEGASUS_THREAD_TYPE self(void) ; |
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private: |
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SimpleThread(); |
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PEGASUS_THREAD_HANDLE _handle; |
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Boolean _is_detached; |
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Boolean _cancel_enabled; |
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Boolean _cancelled; |
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//PEGASUS_SEM_HANDLE _suspend_count; |
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Semaphore _suspend; |
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// always pass this * as the void * parameter to the thread |
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// store the user parameter in _thread_parm |
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PEGASUS_THREAD_RETURN ( PEGASUS_THREAD_CDECL *_start)(void *) ; |
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void *_thread_parm; |
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} ; |
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/////////////////////////////////////////////////////////////////////////////// |
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class PEGASUS_COMMON_LINKAGE thread_data |
class PEGASUS_EXPORT thread_data |
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{ | { |
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public: | public: |
static void default_delete(void *data); | static void default_delete(void *data); |
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thread_data( Sint8 *key ) : _delete_func(NULL) , _data(NULL), _size(0) |
thread_data( const Sint8 *key ) : _delete_func(NULL) , _data(NULL), _size(0) |
{ | { |
PEGASUS_ASSERT(key != NULL); | PEGASUS_ASSERT(key != NULL); |
size_t keysize = strlen(key); | size_t keysize = strlen(key); |
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} | } |
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thread_data(Sint8 *key, size_t size) : _delete_func(default_delete), _size(size) |
thread_data(const Sint8 *key, size_t size) : _delete_func(default_delete), _size(size) |
{ | { |
PEGASUS_ASSERT(key != NULL); | PEGASUS_ASSERT(key != NULL); |
size_t keysize = strlen(key); | size_t keysize = strlen(key); |
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} | } |
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thread_data(Sint8 *key, size_t size, void *data) : _delete_func(default_delete), _size(size) |
thread_data(const Sint8 *key, size_t size, void *data) : _delete_func(default_delete), _size(size) |
{ | { |
PEGASUS_ASSERT(key != NULL); | PEGASUS_ASSERT(key != NULL); |
PEGASUS_ASSERT(data != NULL); | PEGASUS_ASSERT(data != NULL); |
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{ | { |
if( _data != NULL) | if( _data != NULL) |
if(_delete_func != NULL) | if(_delete_func != NULL) |
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{ |
_delete_func( _data ); | _delete_func( _data ); |
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} |
if( _key != NULL ) | if( _key != NULL ) |
delete [] _key; | delete [] _key; |
} | } |
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} | } |
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void copy_data(void **buf, size_t *size) throw(BufferTooSmall, NullPointer) |
void copy_data(void **buf, size_t *size) throw(NullPointer) |
{ | { |
if((buf == NULL) || (size == NULL)) | if((buf == NULL) || (size == NULL)) |
throw NullPointer() ; | throw NullPointer() ; |
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return(true); | return(true); |
return(false); | return(false); |
} | } |
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inline Boolean operator==(const thread_data& b) const | inline Boolean operator==(const thread_data& b) const |
{ | { |
return(operator==((const void *)b._key)); | return(operator==((const void *)b._key)); |
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void *_data; | void *_data; |
size_t _size; | size_t _size; |
Sint8 *_key; | Sint8 *_key; |
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friend class DQueue<thread_data>; | friend class DQueue<thread_data>; |
friend class Thread; | friend class Thread; |
}; | }; |
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/////////////////////////////////////////////////////////////////////////// | /////////////////////////////////////////////////////////////////////////// |
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class PEGASUS_EXPORT Thread |
class PEGASUS_COMMON_LINKAGE ThreadPool; |
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class PEGASUS_COMMON_LINKAGE Thread |
{ | { |
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public: | public: |
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// cancel if there is a pending cancellation request | // cancel if there is a pending cancellation request |
void test_cancel(void); | void test_cancel(void); |
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Boolean is_cancelled(void); |
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// for user-level threads - put the calling thread | // for user-level threads - put the calling thread |
// to sleep and jump to the thread scheduler. | // to sleep and jump to the thread scheduler. |
// platforms with preemptive scheduling and native threads | // platforms with preemptive scheduling and native threads |
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void thread_switch(void); | void thread_switch(void); |
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#ifdef PEGASUS_PLATFORM_LINUX_IX86_GNU |
#if defined(PEGASUS_PLATFORM_LINUX_IX86_GNU) || defined(PEGASUS_PLATFORM_LINUX_GENERIC_GNU) |
// suspend this thread | // suspend this thread |
void suspend(void) ; | void suspend(void) ; |
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void resume(void) ; | void resume(void) ; |
#endif | #endif |
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void sleep(Uint32 msec) ; |
static void sleep(Uint32 msec) ; |
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// block the calling thread until this thread terminates | // block the calling thread until this thread terminates |
void join( void ); | void join( void ); |
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void cleanup_pop(Boolean execute = true) throw(IPCException); | void cleanup_pop(Boolean execute = true) throw(IPCException); |
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// create and initialize a tsd | // create and initialize a tsd |
inline void create_tsd(Sint8 *key, int size, void *buffer) throw(IPCException) |
inline void create_tsd(const Sint8 *key, int size, void *buffer) throw(IPCException) |
{ | { |
thread_data *tsd = new thread_data(key, size, buffer); | thread_data *tsd = new thread_data(key, size, buffer); |
try { _tsd.insert_first(tsd); } | try { _tsd.insert_first(tsd); } |
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// get the buffer associated with the key | // get the buffer associated with the key |
// NOTE: this call leaves the tsd LOCKED !!!! | // NOTE: this call leaves the tsd LOCKED !!!! |
inline void *reference_tsd(Sint8 *key) throw(IPCException) |
inline void *reference_tsd(const Sint8 *key) throw(IPCException) |
{ | { |
_tsd.lock(); | _tsd.lock(); |
thread_data *tsd = _tsd.reference((void *)key); |
thread_data *tsd = _tsd.reference((const void *)key); |
if(tsd != NULL) | if(tsd != NULL) |
return( (void *)(tsd->_data) ); | return( (void *)(tsd->_data) ); |
else | else |
return(NULL); | return(NULL); |
} | } |
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inline void *try_reference_tsd(const Sint8 *key) throw(IPCException) |
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{ |
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_tsd.try_lock(); |
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thread_data *tsd = _tsd.reference((const void *)key); |
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if(tsd != NULL) |
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return((void *)(tsd->_data) ); |
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else |
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return(NULL); |
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} |
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// release the lock held on the tsd | // release the lock held on the tsd |
// NOTE: assumes a corresponding and prior call to reference_tsd() !!! | // NOTE: assumes a corresponding and prior call to reference_tsd() !!! |
inline void dereference_tsd(void) throw(IPCException) | inline void dereference_tsd(void) throw(IPCException) |
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} | } |
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// delete the tsd associated with the key | // delete the tsd associated with the key |
inline void delete_tsd(Sint8 *key) throw(IPCException) |
inline void delete_tsd(const Sint8 *key) throw(IPCException) |
{ | { |
thread_data *tsd = _tsd.remove((void *)key); |
thread_data *tsd = _tsd.remove((const void *)key); |
if(tsd != NULL) | if(tsd != NULL) |
delete tsd; | delete tsd; |
} | } |
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// Note: Caller must delete the thread_data object returned (if not null) |
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inline void *remove_tsd(const Sint8 *key) throw(IPCException) |
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{ |
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return(_tsd.remove((const void *)key)); |
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} |
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inline void empty_tsd(void) throw(IPCException) |
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{ |
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thread_data* tsd; |
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while (0 != (tsd = _tsd.remove_first())) |
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{ |
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delete tsd; |
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} |
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//_tsd.empty_list(); |
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} |
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// create or re-initialize tsd associated with the key | // create or re-initialize tsd associated with the key |
// if the tsd already exists, return the existing buffer |
// if the tsd already exists, delete the existing buffer |
thread_data *put_tsd(Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value) |
void put_tsd(const Sint8 *key, void (*delete_func)(void *), Uint32 size, void *value) |
throw(IPCException) | throw(IPCException) |
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{ | { |
PEGASUS_ASSERT(key != NULL); | PEGASUS_ASSERT(key != NULL); |
PEGASUS_ASSERT(delete_func != NULL); |
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thread_data *tsd ; | thread_data *tsd ; |
tsd = _tsd.remove((void *)key); // may throw an IPC exception |
tsd = _tsd.remove((const void *)key); // may throw an IPC exception |
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delete tsd; |
thread_data *ntsd = new thread_data(key); | thread_data *ntsd = new thread_data(key); |
ntsd->put_data(delete_func, size, value); | ntsd->put_data(delete_func, size, value); |
try { _tsd.insert_first(ntsd); } | try { _tsd.insert_first(ntsd); } |
catch(IPCException& e) { e = e; delete ntsd; throw; } | catch(IPCException& e) { e = e; delete ntsd; throw; } |
return(tsd); |
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} | } |
inline PEGASUS_THREAD_RETURN get_exit(void) { return _exit_code; } | inline PEGASUS_THREAD_RETURN get_exit(void) { return _exit_code; } |
inline PEGASUS_THREAD_TYPE self(void) {return pegasus_thread_self(); } | inline PEGASUS_THREAD_TYPE self(void) {return pegasus_thread_self(); } |
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PEGASUS_THREAD_HANDLE getThreadHandle() {return _handle;} | PEGASUS_THREAD_HANDLE getThreadHandle() {return _handle;} |
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inline Boolean operator==(const void *key) const |
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{ |
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if ( (void *)this == key) |
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return(true); |
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return(false); |
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} |
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inline Boolean operator==(const Thread & b) const |
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{ |
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return(operator==((const void *)&b )); |
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} |
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void detach(void); |
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private: | private: |
Thread(); | Thread(); |
inline void create_tsd(Sint8 *key ) throw(IPCException) |
inline void create_tsd(const Sint8 *key ) throw(IPCException) |
{ | { |
thread_data *tsd = new thread_data(key); | thread_data *tsd = new thread_data(key); |
try { _tsd.insert_first(tsd); } | try { _tsd.insert_first(tsd); } |
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void *_thread_parm; | void *_thread_parm; |
PEGASUS_THREAD_RETURN _exit_code; | PEGASUS_THREAD_RETURN _exit_code; |
static Boolean _signals_blocked; | static Boolean _signals_blocked; |
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friend class ThreadPool; |
} ; | } ; |
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#if 0 |
class PEGASUS_COMMON_LINKAGE ThreadPool |
class PEGASUS_EXPORT Aggregator { |
{ |
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public: | public: |
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Aggregator(); |
ThreadPool(Sint16 initial_size, |
~Aggregator(); |
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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~ThreadPool(void); |
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void allocate_and_awaken(void *parm, |
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PEGASUS_THREAD_RETURN (PEGASUS_THREAD_CDECL *work)(void *), |
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Semaphore *blocking = 0) |
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throw(IPCException); |
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void started(void); |
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void completed(void); |
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void remaining(int operations); |
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void put_result(CIMReference *ref); |
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private: |
Uint32 kill_dead_threads( void ) |
int _reference_count; |
throw(IPCException); |
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void get_key(Sint8 *buf, int bufsize); |
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// keep track of the thread running this operation so we can kill |
inline Boolean operator==(const void *key) const |
// it if necessary |
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Thread _owner; |
if ( ! strncmp( reinterpret_cast<Sint8 *>(const_cast<void *>(key)), _key, 16 )) |
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return(true); |
// this is a phased aggregate. when it is complete is will |
return(false); |
// be streamed to the client regardless of the state of |
} |
// siblings |
inline Boolean operator==(const ThreadPool & b) const |
Boolean _is_phased; |
{ |
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return(operator==((const void *) b._key )); |
int _total_values; |
} |
int _completed_values; |
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int _total_child_values; |
inline void set_min_threads(Sint16 min) |
int _completed_child_values; |
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int _completion_state; |
_min_threads = min; |
struct timeval _last_update; |
} |
time_t lifetime; |
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Aggregator *_parent; |
inline Sint16 get_min_threads(void) const |
// children may be phased or not phased |
{ |
DQueue _children; |
return _min_threads; |
// empty results that are filled by provider |
} |
DQueue _results; |
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// array of predicates for events and |
inline void set_max_threads(Sint16 max) |
// stored queries (cursors) |
{ |
Array _filter; |
_max_threads = max; |
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} |
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inline Sint16 get_max_threads(void) const |
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{ |
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return _max_threads; |
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} |
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inline void set_allocate_wait(const struct timeval & alloc_wait) |
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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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} |
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inline struct timeval *get_allocate_wait(struct timeval *buffer) const |
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{ |
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if(buffer == 0) |
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throw NullPointer(); |
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buffer->tv_sec = _allocate_wait.tv_sec; |
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buffer->tv_usec = _allocate_wait.tv_usec; |
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return buffer; |
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} |
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inline void set_deallocate_wait(const struct timeval & dealloc_wait) |
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{ |
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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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} |
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inline struct timeval *get_deallocate_wait(struct timeval *buffer) const |
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{ |
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if(buffer == 0) |
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throw NullPointer(); |
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buffer->tv_sec = _deallocate_wait.tv_sec; |
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buffer->tv_usec = _deallocate_wait.tv_usec; |
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return buffer; |
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} |
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inline void set_deadlock_detect(const struct timeval & deadlock) |
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{ |
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_deadlock_detect.tv_sec = deadlock.tv_sec; |
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_deadlock_detect.tv_usec = deadlock.tv_usec; |
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} |
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inline struct timeval * get_deadlock_detect(struct timeval *buffer) const |
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{ |
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if(buffer == 0) |
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throw NullPointer(); |
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buffer->tv_sec = _deadlock_detect.tv_sec; |
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buffer->tv_usec = _deadlock_detect.tv_usec; |
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return buffer; |
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} |
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inline Uint32 running_count(void) |
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{ |
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return _running.count(); |
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} |
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inline Uint32 pool_count(void) |
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{ |
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return _pool.count(); |
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} |
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inline Uint32 dead_count(void) |
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{ |
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return _dead.count(); |
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} |
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static Boolean check_time(struct timeval *start, struct timeval *interval); |
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Boolean operator ==(const ThreadPool & p) |
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{ |
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return operator==((const void *)&p); |
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} |
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Boolean operator ==(const void *p) |
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{ |
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if((void *)this == p) |
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return true; |
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return false; |
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} |
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static void kill_idle_threads(void); |
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private: |
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ThreadPool(void); |
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Sint16 _max_threads; |
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Sint16 _min_threads; |
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AtomicInt _current_threads; |
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struct timeval _allocate_wait; |
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struct timeval _deallocate_wait; |
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struct timeval _deadlock_detect; |
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static PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL _loop(void *); |
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Sint8 _key[17]; |
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DQueue<Thread> _pool; |
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DQueue<Thread> _running; |
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DQueue<Thread> _dead; |
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AtomicInt _dying; |
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static void _sleep_sem_del(void *p); |
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void _check_deadlock(struct timeval *start) throw(Deadlock); |
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Boolean _check_deadlock_no_throw(struct timeval *start); |
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Boolean _check_dealloc(struct timeval *start); |
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Thread *_init_thread(void) throw(IPCException); |
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void _link_pool(Thread *th) throw(IPCException); |
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static PEGASUS_THREAD_RETURN _undertaker(void *); |
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static DQueue<ThreadPool> _pools; |
} ; | } ; |
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#if defined(PEGASUS_OS_TYPE_WINDOWS) |
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# include "ThreadWindows_inline.h" |
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#elif defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) |
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# include "ThreadzOS_inline.h" |
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#elif defined(PEGASUS_OS_TYPE_UNIX) |
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# include "ThreadUnix_inline.h" |
#endif | #endif |
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PEGASUS_NAMESPACE_END | PEGASUS_NAMESPACE_END |