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Used by an entity to notify the HAM of a state transition
#include <ha/ham.h>
int ham_entity_condition_state(
ham_entity_t *ehdl,
unsigned tostate,
unsigned flags );
libham
This function enables an entity to report a transition to the HAM;
the value tostate indicates the transitional state.
The HAM in turn triggers a condition state event for this entity, and will search for
matching subscribers for this event and execute all associated
actions. For more details of the matching mechanisms refer to the
API documentation for
ham_condition_state().
- 0
- Success.
- -1
- An error occurred (errno is set).
- EBADF
- Couldn't connect to the HAM.
- EINVAL
- The handle specified in ehdl is invalid.
The connection to the HAM is invalid. This happens when the
process that opened the connection (using ham_connect())
and the process that's calling this function are not the same.
- ENOENT
- There's no entity by the given handle (ehdl).
In addition to the above errors, the HAM returns any error
it encounters while servicing this request.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
ham_condition(),
ham_condition_raise(),
ham_condition_state(),
ham_attach()
ham_attach_self()
ham_entity()
ham_entity_control()
ham_entity_handle()
ham_entity_handle_free()
ham_entity_node()
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