AlliedModders - plugin-to-plugin communication

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- - plugin-to-plugin communication (https://forums.alliedmods.net/showthread.php?t=658)

plugin-to-plugin communication

to what extent can plugins communicate with one another?

xvars, cvars, vault, files, sql, tasks, ...

But to be honest; why do you need interplugin communication? I have made a lot of plugins and almost never really needed that.

I can see that .. I'm thinking of redoing next map.. and map chooser so they track the last 5 maps.. I would like to share vars between them.

you can also call a public function in an another plugin using the callfunc_* natives. Check the amxmodx.inc file for details

Quote:

Originally Posted by PM

you can also call a public function in an another plugin using the callfunc_* natives. Check the amxmodx.inc file for details

Quote:

/* Call a function in this / an another plugin by name.
* Parameters:
* plugin - plugin name; if "", the caller plugin is used.
* If specified, it has to be the exact name (for example stats.amx)
* func - function name
* Return value:
* 1 - Success
* 0 - Runtime error
* -1 - Plugin not found
* -2 - Function not found */
native callfunc_begin(const plugin[]="", const func[]);

/* Push a parameter (integer, string, float) */
native callfunc_push_int(value);
native callfunc_push_str(value[]);
native callfunc_push_float(Float: value);
native callfunc_push_intrf(&value);
native callfunc_push_floatrf(& Float: value);

/* Make the actual call.
* Return value of the function called. */
native callfunc_end();

Do all three of those need to be used when calling a pubic?

when

hmm lol the function prototype actually is

Code:

native callfunc_begin(const func[], const plugin[]="");

looks like we have messed it up in the include file

anyways, here is an example:

Code:

callfunc_begin("my_function", "theplugin.amx");
callfunc_push_int(4);
callfunc_push_str("Hello");
callfunc_push_float(myfloatvalue);
new returnValue = callfunc_end();

this will call the public function my_function in the plugin theplugin.amx, the first parameter will be 4, the second parameter will be "Hello", the third parameter will be the value of myfloatvalue variable / constant / whatever. In returnValue, the return value will be stored ;]

callfunc_push_int: push the value of the integer
used with normal parameters
callfunc_push_intrf: push the reference to the variable
used with &prm parameters
callfunc_push_float: push the value of the float
used with Float:prm parameters
callfunc_push_floatrf: push the reference to the float variable
used with &Float:prm parameters
callfunc_push_str: push a string (an array)
used with prm[] / const prm[] parameters

A native like
callfunc(func, plugin, param1, param2, param2);
is not possible / very very hard to implement.

Is there anything bad, to use a couple of cvars for communication? Especially slow, limited, etc...?

What does it mean to "push"?

snd info over to that plugin

push and pop refer to stacks of data such as an array or list.

Push adds an item to the tail/end of a list. PM's callfunc works by pushing values onto a list of parameters and then calling the actual function once you end it. much like message_begin ... write_x.... message_end