Echelon Neuron C - Manual (Page 143)

Neuron C Reference Guide 123
Example
void f(void)
{
unsigned
value;
...
value = random();
}
resp_alloc( ) Built-in Function
The resp_alloc( ) built-in function allocates an object for an outgoing response.
The function returns TRUE if a resp_out object can be allocated. The function
returns FALSE if a resp_out object cannot be allocated. When this function
returns FALSE, a program can continue with other processing, if necessary,
rather than waiting for a free message buffer.
See Chapter 6, How Devices Communicate Using Application Messages, in the
Neuron C Programmer's Guide for more information about application messages.
Syntax
boolean resp_alloc (void);
Example
when (...)
{
if (resp_alloc()) {
// OK. Build and send message
...
}
}
resp_cancel( ) Built-in Function
The resp_cancel( ) built-in function cancels the response being built and frees the
associated resp_out object, allowing another response to be constructed.
If a response is constructed but not sent before the critical section (for example, a
task) is exited, the response is automatically cancelled. See Chapter 6, How
Devices Communicate Using Application Messages, of the Neuron C
Programmer's Guide for more information.
Syntax
void resp_cancel (void);
Example
void f(void)
{
if (resp_alloc()) {
...