send
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send

send — transmits expressions for evaluation.

Synopsis

send (task, s_exp)

Arguments

task

A task descriptor as assigned to a locate_task call.

s_exp

Any Gamma or Lisp expression.

Returns

A result depending on the receiving task, which could include:

  • t if the message was delivered successfully.

  • nil if the message could not be delivered.

  • An expression in the form: (error "error message") if there was an error. See error.

Description

This function constructs an ASCII string representing the s_exp and transmits it via synchronous interprocess communication to the receiving task. The task processes the message and returns a result based on that processing. If the task is another Gamma process, the message will be interpreted as a Gamma expression and evaluated. The return value will be the result of that evaluation.

Example

Task 1:

Gamma> init_ipc ("a","a");
t
Gamma> tsk = locate_task("b",nil);
#<Task:9751>
Gamma> send(tsk, #princ("hello\n"));
hello
t
Gamma> send_async(tsk, #princ(cos(5), "\n"));
t
Gamma> send(tsk, #princ("goodbye\n"));
t
Gamma>

Task 2:

Gamma> init_ipc ("b","b");
t
Gamma> while(t) next_event();
hello
0.28366218546322624627
goodbye

See Also

isend, locate_task, send_async, send_string, send_string_async

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