ACE
6.1.2
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This Proactor makes use of Asynchronous I/O Control Blocks (AIOCB) to notify/get the completion status of the <aio_> operations issued. More...
#include <POSIX_Proactor.h>
Public Member Functions | |
ACE_POSIX_AIOCB_Proactor (size_t nmaxop=ACE_AIO_DEFAULT_SIZE) | |
virtual Proactor_Type | get_impl_type (void) |
virtual | ~ACE_POSIX_AIOCB_Proactor (void) |
Destructor. | |
virtual int | close (void) |
Close down the Proactor. | |
virtual int | handle_events (ACE_Time_Value &wait_time) |
virtual int | handle_events (void) |
virtual int | post_completion (ACE_POSIX_Asynch_Result *result) |
Post a result to the completion port of the Proactor. | |
virtual int | start_aio (ACE_POSIX_Asynch_Result *result, ACE_POSIX_Proactor::Opcode op) |
virtual int | cancel_aio (ACE_HANDLE h) |
Protected Member Functions | |
ACE_POSIX_AIOCB_Proactor (size_t nmaxop, ACE_POSIX_Proactor::Proactor_Type ptype) | |
virtual int | get_result_status (ACE_POSIX_Asynch_Result *asynch_result, int &error_status, size_t &transfer_count) |
int | create_result_aiocb_list (void) |
Create aiocb list. | |
int | delete_result_aiocb_list (void) |
void | create_notify_manager (void) |
void | delete_notify_manager (void) |
void | check_max_aio_num (void) |
void | set_notify_handle (ACE_HANDLE h) |
To identify requests from Notify_Pipe_Manager. | |
int | handle_events_i (u_long milli_seconds) |
int | start_deferred_aio (void) |
Start deferred AIO if necessary. | |
virtual int | cancel_aiocb (ACE_POSIX_Asynch_Result *result) |
Cancel running or deferred AIO. | |
ACE_POSIX_Asynch_Result * | find_completed_aio (int &error_status, size_t &transfer_count, size_t &index, size_t &count) |
Extract the results of aio. | |
virtual ssize_t | allocate_aio_slot (ACE_POSIX_Asynch_Result *result) |
Find free slot to store result and aiocb pointer. | |
virtual int | start_aio_i (ACE_POSIX_Asynch_Result *result) |
Initiate an aio operation. | |
virtual int | notify_completion (int sig_num) |
int | putq_result (ACE_POSIX_Asynch_Result *result) |
Put "post_completed" result into the internal queue. | |
ACE_POSIX_Asynch_Result * | getq_result (void) |
Get "post_completed" result from the internal queue. | |
int | clear_result_queue (void) |
Clear the internal results queue. | |
int | process_result_queue (void) |
Process the internal results queue. | |
Protected Attributes | |
ACE_AIOCB_Notify_Pipe_Manager * | aiocb_notify_pipe_manager_ |
aiocb ** | aiocb_list_ |
ACE_POSIX_Asynch_Result ** | result_list_ |
size_t | aiocb_list_max_size_ |
To maintain the maximum size of the array (list). | |
size_t | aiocb_list_cur_size_ |
To maintain the current size of the array (list). | |
ACE_SYNCH_MUTEX | mutex_ |
Mutex to protect work with lists. | |
ACE_HANDLE | notify_pipe_read_handle_ |
size_t | num_deferred_aiocb_ |
size_t | num_started_aio_ |
Number active,i.e. running requests. | |
ACE_Unbounded_Queue < ACE_POSIX_Asynch_Result * > | result_queue_ |
Queue which keeps "post_completed" ACE_POSIX_Asynch_Result's. | |
Friends | |
class | ACE_AIOCB_Notify_Pipe_Manager |
Handler needs to call application specific code. | |
class | ACE_POSIX_Asynch_Operation |
class | ACE_POSIX_Asynch_Accept |
class | ACE_POSIX_Asynch_Connect |
This Proactor makes use of Asynchronous I/O Control Blocks (AIOCB) to notify/get the completion status of the <aio_> operations issued.
ACE_POSIX_AIOCB_Proactor::ACE_POSIX_AIOCB_Proactor | ( | size_t | nmaxop = ACE_AIO_DEFAULT_SIZE | ) |
Constructor defines max number asynchronous operations which can be started at the same time
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Destructor.
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Special constructor for ACE_SUN_Proactor and ACE_POSIX_SIG_Proactor
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protectedvirtual |
Find free slot to store result and aiocb pointer.
Reimplemented in ACE_POSIX_CB_Proactor.
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This method should be called from ACE_POSIX_Asynch_Operation::cancel() instead of usual ::aio_cancel. For all deferred AIO requests with handle "h" it removes its from the lists and notifies user. For all running AIO requests with handle "h" it calls ::aio_cancel. According to the POSIX standards we will receive ECANCELED for all ::aio_canceled AIO requests later on return from ::aio_suspend
Implements ACE_POSIX_Proactor.
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protectedvirtual |
Cancel running or deferred AIO.
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Define the maximum number of asynchronous I/O requests for the current OS
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Clear the internal results queue.
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Close down the Proactor.
Reimplemented from ACE_POSIX_Proactor.
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Call these methods from derived class when virtual table is built.
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Create aiocb list.
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Call this method from derived class when virtual table is built.
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Extract the results of aio.
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Reimplemented from ACE_POSIX_Proactor.
Reimplemented in ACE_POSIX_CB_Proactor.
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protectedvirtual |
Check AIO for completion, error and result status Return: 1 - AIO completed , 0 - not completed yet
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Get "post_completed" result from the internal queue.
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Dispatch a single set of events. If wait_time elapses before any events occur, return 0. Return 1 on success i.e., when a completion is dispatched, non-zero (-1) on errors and errno is set accordingly.
Implements ACE_POSIX_Proactor.
Reimplemented in ACE_POSIX_CB_Proactor.
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Block indefinitely until at least one event is dispatched. Dispatch a single set of events. If wait_time elapses before any events occur, return 0. Return 1 on success i.e., when a completion is dispatched, non-zero (-1) on errors and errno is set accordingly.
Implements ACE_POSIX_Proactor.
Reimplemented in ACE_POSIX_CB_Proactor.
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Dispatch a single set of events. If <milli_seconds> elapses before any events occur, return 0. Return 1 if a completion dispatched. Return -1 on errors.
Reimplemented in ACE_POSIX_CB_Proactor.
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protectedvirtual |
Notify queue of "post_completed" ACE_POSIX_Asynch_Results called from post_completion method
Reimplemented in ACE_POSIX_CB_Proactor.
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Post a result to the completion port of the Proactor.
Implements ACE_POSIX_Proactor.
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Process the internal results queue.
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Put "post_completed" result into the internal queue.
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To identify requests from Notify_Pipe_Manager.
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virtual |
Implements ACE_POSIX_Proactor.
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protectedvirtual |
Initiate an aio operation.
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Start deferred AIO if necessary.
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friend |
Handler needs to call application specific code.
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friend |
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friend |
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friend |
This class does the registering of Asynch Operations with the Proactor which is necessary in the AIOCB strategy.
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Use a dynamically allocated array to keep track of all the aio's issued currently.
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To maintain the current size of the array (list).
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To maintain the maximum size of the array (list).
This class takes care of doing <accept> when we use AIO_CONTROL_BLOCKS strategy.
Mutex to protect work with lists.
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The purpose of this member is only to identify asynchronous request from NotifyManager. We will reserve for it always slot 0 in the list of aiocb's to be sure that don't lose notifications.
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Number of ACE_POSIX_Asynch_Result's waiting for start i.e. deferred AIOs
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Number active,i.e. running requests.
Queue which keeps "post_completed" ACE_POSIX_Asynch_Result's.