diff options
Diffstat (limited to 'dep/acelite/ace/Task_T.h')
-rw-r--r-- | dep/acelite/ace/Task_T.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/dep/acelite/ace/Task_T.h b/dep/acelite/ace/Task_T.h new file mode 100644 index 00000000000..d79a5fb0e46 --- /dev/null +++ b/dep/acelite/ace/Task_T.h @@ -0,0 +1,198 @@ +// -*- C++ -*- + +//============================================================================= +/** + * @file Task_T.h + * + * $Id: Task_T.h 91016 2010-07-06 11:29:50Z johnnyw $ + * + * @author Douglas C. Schmidt <schmidt@cs.wustl.edu> + */ +//============================================================================= + +#ifndef ACE_TASK_T_H +#define ACE_TASK_T_H +#include /**/ "ace/pre.h" + +#include "ace/Message_Queue.h" + +#if !defined (ACE_LACKS_PRAGMA_ONCE) +# pragma once +#endif /* ACE_LACKS_PRAGMA_ONCE */ + +#include "ace/Synch_Traits.h" +#include "ace/Task.h" +#include "ace/IO_Cntl_Msg.h" + +ACE_BEGIN_VERSIONED_NAMESPACE_DECL + +// Forward decls... +template <ACE_SYNCH_DECL> class ACE_Module; + +/** + * @class ACE_Task + * + * @brief Primary interface for application message processing, as well + * as input and output message queueing. + * + * This class serves as the basis for passive and active objects + * in ACE. + */ +template <ACE_SYNCH_DECL> +class ACE_Task : public ACE_Task_Base +{ +public: + friend class ACE_Module<ACE_SYNCH_USE>; + friend class ACE_Module_Type; + + // = Initialization/termination methods. + /** + * Initialize a Task, supplying a thread manager and a message + * queue. If the user doesn't supply a ACE_Message_Queue pointer + * then we'll allocate one dynamically. Otherwise, we'll use the + * one passed as a parameter. + */ + ACE_Task (ACE_Thread_Manager *thr_mgr = 0, + ACE_Message_Queue<ACE_SYNCH_USE> *mq = 0); + + /// Destructor. + virtual ~ACE_Task (void); + + /// Gets the message queue associated with this task. + ACE_Message_Queue<ACE_SYNCH_USE> *msg_queue (void); + + /// Sets the message queue associated with this task. + void msg_queue (ACE_Message_Queue<ACE_SYNCH_USE> *); + +public: // Should be protected: + // = Message queue manipulation methods. + + // = Enqueue and dequeue methods. + + // For the following five method if @a timeout == 0, the caller will + // block until action is possible, else will wait until the + // <{absolute}> time specified in *@a timeout elapses). These calls + // will return, however, when queue is closed, deactivated, when a + // signal occurs, or if the time specified in timeout elapses, (in + // which case errno = EWOULDBLOCK). + + /// Insert message into the message queue. Note that @a timeout uses + /// <{absolute}> time rather than <{relative}> time. + int putq (ACE_Message_Block *, ACE_Time_Value *timeout = 0); + + /** + * Extract the first message from the queue (blocking). Note that + * @a timeout uses <{absolute}> time rather than <{relative}> time. + * Returns number of items in queue if the call succeeds or -1 otherwise. + */ + int getq (ACE_Message_Block *&mb, ACE_Time_Value *timeout = 0); + + /// Return a message to the queue. Note that @a timeout uses + /// <{absolute}> time rather than <{relative}> time. + int ungetq (ACE_Message_Block *, ACE_Time_Value *timeout = 0); + + /** + * Turn the message around, sending it in the opposite direction in + * the stream. To do this, the message is put onto the task next in + * the stream after this task's sibling. + * + * @param mb Pointer to the block that is used in the reply. + * @param tv The absolute time at which the put operation used to + * send the message block to the next module in the stream + * will time out. If 0, this call blocks until it can be + * completed. + */ + int reply (ACE_Message_Block *mb, ACE_Time_Value *tv = 0); + + /** + * Transfer message to the adjacent ACE_Task in a ACE_Stream. Note + * that @a timeout uses <{absolute}> time rather than <{relative}> + * time. + */ + int put_next (ACE_Message_Block *msg, ACE_Time_Value *timeout = 0); + + /** + * Tests whether we can enqueue a message without blocking. + * + * @deprecated This method is deprecated and will go away in the future. + */ + int can_put (ACE_Message_Block *); + + // = ACE_Task utility routines to identify names et al. + /// Return the name of the enclosing Module if there's one associated + /// with the Task, else returns 0. + const ACE_TCHAR *name (void) const; + + // = Pointers to next ACE_Task_Base (if ACE is part of an ACE_Stream). + /// Get next Task pointer. + ACE_Task<ACE_SYNCH_USE> *next (void); + + /// Set next Task pointer. + void next (ACE_Task<ACE_SYNCH_USE> *); + + /// Return the Task's sibling if there's one associated with the + /// Task's Module, else returns 0. + ACE_Task<ACE_SYNCH_USE> *sibling (void); + + /// Return the Task's Module if there is one, else returns 0. + ACE_Module<ACE_SYNCH_USE> *module (void) const; + + /** + * Flush the task's queue, i.e., free all of the enqueued + * message blocks and unblocks any threads waiting on the queue. + * Note that if this conflicts with the C++ iostream <flush> + * function, just rewrite the iostream function as ::<flush>. + */ + int flush (u_long flag = ACE_Task_Flags::ACE_FLUSHALL); + + // = Special routines corresponding to certain message types. + + /// Manipulate watermarks. + void water_marks (ACE_IO_Cntl_Msg::ACE_IO_Cntl_Cmds, size_t); + + /// Queue of messages on the ACE_Task.. + ACE_Message_Queue<ACE_SYNCH_USE> *msg_queue_; + + /// true if should delete Message_Queue, false otherwise. + bool delete_msg_queue_; + + /// Back-pointer to the enclosing module. + ACE_Module<ACE_SYNCH_USE> *mod_; + + /// Pointer to adjacent ACE_Task. + ACE_Task<ACE_SYNCH_USE> *next_; + + /// Dump the state of an object. + void dump (void) const; + + /// Declare the dynamic allocation hooks. + ACE_ALLOC_HOOK_DECLARE; + +private: + + // = Disallow these operations. + ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Task<ACE_SYNCH_USE> &)) + ACE_UNIMPLEMENTED_FUNC (ACE_Task (const ACE_Task<ACE_SYNCH_USE> &)) +}; + +#if defined ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT +template class ACE_Export ACE_Task<ACE_MT_SYNCH>; +template class ACE_Export ACE_Task<ACE_NULL_SYNCH>; +#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION_EXPORT */ + +ACE_END_VERSIONED_NAMESPACE_DECL + +#if defined (__ACE_INLINE__) +#include "ace/Task_T.inl" +#endif /* __ACE_INLINE__ */ + +#if defined (ACE_TEMPLATES_REQUIRE_SOURCE) +#include "ace/Task_T.cpp" +#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */ + +#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA) +#pragma implementation ("Task_T.cpp") +#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */ + +#include /**/ "ace/post.h" +#endif /* ACE_TASK_T_H */ |