ham_connect(), ham_connect_nd(), ham_connect_node()

Connect to the HAM


#include <ha/ham.h>

int ham_connect( unsigned flags);
int ham_connect_nd( int nd, unsigned flags);
int ham_connect_node( const char *nodename, unsigned flags);




The ham_connect() function initializes a connection to a HAM. The ham_connect_nd() and ham_connect_node() functions initialize connections to remote HAMs.

Note: A process may have only a single connection open to a HAM at any time.

The nd specified to ham_connect_nd is the node identifier of the remote node at the time the ham_connect_nd() call is made.

Note: Since node identifiers are transient objects, you should obtain the value for nd immediately before the call, using netmgr_strtond() or another function that converts nodenames into node identifiers.

The ham_connect_node() function takes as a parameter a fully qualified node name (FQNN).

You can call these functions any number of times, but because the library maintains a reference count, you need to call ham_disconnect() the same number of times to release the connection.

Connections are associated with a specific process ID (pid). If a process performs ham_connect() and then calls fork(), the child process needs to reconnect to the HAM by calling ham_connect() again.

But if a process calls any of the following:

it doesn't need to call ham_connect*(), since those functions do so on their own.

For all other ham*() functions, clients must call ham_connect() first.

There are no flags defined at this time.


An error occurred (errno is set).


Upon failure, the ham_connect*() functions return the error as set by the underlying open() library call that failed.


QNX Neutrino

Cancellation point No
Interrupt handler No
Signal handler No
Thread Yes