Tango::ApiUtil Class Reference

Miscellaneous utility methods usefull in a Tango client. More...

#include "tango.h"

Public Member Functions
cb_sub_model	get_asynch_cb_sub_model ()
	Get asynchronous callback sub-model. More...
void	get_asynch_replies ()
	Fire callback methods for asynchronous request(s) More...
void	get_asynch_replies (long timeout)
	Fire callback methods for asynchronous request(s) with timeout. More...
size_t	pending_asynch_call (asyn_req_type ty)
	Get pending asynchronous requets number. More...
void	set_asynch_cb_sub_model (cb_sub_model csm)
	Set asynchronous callback sub-model. More...

Static Public Member Functions
static TANGO_IMP_EXP void	cleanup ()
	Destroy the ApiUtil instance. More...
static TANGO_IMP_EXP int	get_env_var (const char *name, string &value)
	Get environment variable. More...
static TANGO_IMP_EXP ApiUtil *	instance ()
	Retrieve the ApiUtil instance. More...

Detailed Description

Miscellaneous utility methods usefull in a Tango client.

This class is a singleton. Therefore, it is not necessary to create it. It will be automatically done. A static method allows a user to retrieve the instance

Author

taurel

Revision

1

Member Function Documentation

cleanup()

static TANGO_IMP_EXP void Tango::ApiUtil::cleanup ( )

inlinestatic

Destroy the ApiUtil instance.

Destroy the ApiUtil singleton instance.

get_asynch_cb_sub_model()

cb_sub_model Tango::ApiUtil::get_asynch_cb_sub_model ( )

inline

Get asynchronous callback sub-model.

Get the asynchronous callback sub-model

Returns

The asynchronous callback sub-model

get_asynch_replies() [1/2]

void Tango::ApiUtil::get_asynch_replies

(

)

Fire callback methods for asynchronous request(s)

Fire callback methods for all (any device) asynchronous requests (command and attribute) with already arrived replied. Returns immediately if there is no replies already arrived or if there is no asynchronous requests.

get_asynch_replies() [2/2]

void Tango::ApiUtil::get_asynch_replies

(

long

timeout

)

Fire callback methods for asynchronous request(s) with timeout.

Fire callback methods for all (any device) asynchronous requests (command and attributes) with already arrived replied. Wait and block the caller for timeout milliseconds if they are some device asynchronous requests which are not yet arrived. Returns immediately if there is no asynchronous request. If timeout is set to 0, the call waits until all the asynchronous requests sent has received a reply.

Parameters

[in]

timeout

The timeout value

get_env_var()

static TANGO_IMP_EXP int Tango::ApiUtil::get_env_var ( const char *  name, string &  value  )

static

Get environment variable.

Get environment variable. On Unixes OS, this call tries to get the variable in the caller environment then in a file .tangorc in the user home directory and finally in a file /etc/tangorc. On Windows, this call looks in the user environment then in a file stored in TANGO_HOME%/tangorc. This method returns 0 of the environment variable is found. Otherwise, it returns -1.

Parameters

[in]	name	The environment variable name
[out]	value	The environment variable value

Returns

Set to -1 if the environment varaibel is not found

instance()

ApiUtil * Tango::ApiUtil::instance ( )

inlinestatic

Retrieve the ApiUtil instance.

Return the ApiUtil singleton instance

Returns

The singleton instance

Some inline methods

pending_asynch_call()

size_t Tango::ApiUtil::pending_asynch_call ( asyn_req_type  ty )

inline

Get pending asynchronous requets number.

Return number of asynchronous pending requests (any device).

Parameters

[in]

ty

Asynchronous request type

Returns

Pending asynchronous request number

set_asynch_cb_sub_model()

void Tango::ApiUtil::set_asynch_cb_sub_model

(

cb_sub_model

csm

)

Set asynchronous callback sub-model.

Set the asynchronous callback sub-model between the pull and push sub-model. See Tango book chapter 4.5 to read the definition of these sub-models. By default, all Tango client using asynchronous callback model are in pull sub-model. This call must be used to switch to the push sub-model. NOTE that in push sub-model, a separate thread is spawned to deal with server replies.

Parameters

[in]

csm

The asynchronous callback sub-model

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The documentation for this class was generated from the following file:

• devapi.h