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Send a heartbeat to the HAM
#include <ha/ham.h>
int ham_heartbeat( void );
libham
Self-attached entities that have committed to sending
heartbeats at prescribed intervals need to call
ham_heartbeat() when they want to transmit a
heartbeat.
The ham_heartbeat() function does nothing if the
client isn't a self-attached entity or hasn't committed to
sending heartbeats.
This function always succeeds.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
Although this function always succeeds, the HAM doesn't
always receive the heartbeat right away.
For example, if a client commits to sending a heartbeat
every 5 seconds (at 5-, 10-, 15-second intervals, and so on),
but instead transmits at the 2-second mark, then the HAM
won't receive a heartbeat until the 5-second mark.
Or if the client sends a heartbeat at the 7-second mark and
another at the 8-second mark, then the HAM will receive only
one heartbeat at the 10-second mark.
ham_attach_self(),
ham_detach_self()
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